CHAPTER 1INTRODUCTIONForest management implemented so far has
led to the degradation impact on the need for the preservation of wildlife
habitat and ecosystem of tropical rain. Concerns about the decline in wildlife
populations and their habitats due to forest use has been recognized by many
parties. From 1981 to 1985, every year 4.4 million hectares of forests
worldwide cut of which 3.8 million ha converted to non-forest land for the
purpose, so that the rate of reduction of forest in the world about one percent
per year of the remaining forest area (WWF, 1990).
In Indonesia, in the period between
1998-2004 there has been a vast change in tropical forests from primary to
secondary forest conditions an average of 1.15 million ha per year, and changes
of secondary forest to degraded forest 2.15 million ha per year (Ministry of
Forestry , 2005). The rate of increase in the critical field of the year
2000-2006 average of 3.62% per year even for Kalimantan critical land rate of
increase of 4.4% a year (Ministry of Forestry, 2007). According to the theory
of biogeography, widespread habitat islands or ten times greater then the
number of species that inhabit the opportunities will increase two-fold (Diamond,
1975). With such diversity, wildlife populations and habitat will follow the
rules above, as the basis for establishing the conservation area.
Protection of wildlife in Indonesia,
especially endangered species, has been started since 1931 with the Wild Animals
Protection Ordinance 1931 (Statute No. 1931. No. 226 jis 1932. No. 28 and 1935.
513). Protected primates include proboscis (Nasalis larvatus Wurmb.), All kinds
of gibbons (Hylobates spp.), And orangutans (Pongo pygmaeus). Efforts to
improve wildlife conservation also being conducted melaIui establishment and
structuring of various conservation area, which is now a conservation area land
accounted for 17% (22,702,527.17 ha) of forests of Indonesia (Ministry of
Forestry, 2007). Conservation area is not only to maintain the continuity of
ecological and evolutionary processes that determine species diversity, but
also for the preservation of natural germplasm of high economic and ecological
value.
Development of a conservation area is a
realization of Law. 5 of 1990 on Conservation of Biological Resources and
Ekosistemnya.Dengan the various interests of forest land allocation and not all
populations of rare and endangered primates included in the conservation area.
To protect the existing wildlife outside protected areas such as in the area of
forest concessions (HPH) or Licensed Timber Utilisation (IUPHHK), of course,
need to consider the use of forests and wildlife habitat tolerance to damage,
in addition to developing a conservation area within the concession (starting
with the Forestry Minister. 252/Kpts-II/1993) and developed to the Forestry
Minister. 4795/Kpts-II/2002 about Keriteria and Natural Forest Management
Indicators for Sustainable Production).
Preservation of forests outside of
protected areas important to the preservation of wildlife and the environment.
In the forest conservation is necessary to find an ecological indicator of
environmental quality as a determinant of the forest, such as wildlife that
depend on the forest stand. In the forest areas in Sumatra, Java, Kalimantan,
and Sulawesi are inhabited by endangered species protected, primates can be
used as an indicator in forest management and conservation strategies to
determine. This species in his life depend on tree stands in performing daily
activities, especially the trees as the main source of feed. In this case,
knowledge about the ecological factors that affect patterns of eating behavior
(feeding behavior) or feeding ecology (feeding ecology) management system to
support habitat and wildlife populations in the conservation area as well as in
production forests (Bismark, 1993; Meiyaardet al. , 2006).
1.1. Animals Endemic Proboscis Monkey
Proboscis Monkey (Nasalis larvatus Wurmb.)
Is a type of animal that is included in the Order (the nation) Primates, Family
(tribe) Cercophitecidae, and subfamily (child rate) Colobinae (Jolly, 1972)
with the conservation status of endangered (IUCN, 2008), including the Appendix
I of CITES and very high attention in conservation efforts. This species is
classified as very rare and endemic species, with limited habitat mangrove
forests around the river, and peat swamp habitat in which some have been
threatened by various human activities.
According to McNeely et al. (1990), of
29,500 square km proboscis monkey habitat, this time has been reduced of 40%,
while the status of protected areas is only 4.1%. In 2000, the rate of
deforestation, habitat proboscis 3.49% per year (Supriatna, 2004). Of the six
ecosystem types proboscis monkey habitat, in 1995 there has been a broad
decline in habitat between 20-88% (Meijaard, 2000) and the rate of decline is
habitat within and outside conservation areas two percent per year (PHVA
Proboscis monkeys, 2004). As a result of these habitat penurunanluas the
proboscis monkey populations tend to decline as these primates are less
tolerant of habitat destruction (Wilson and Wilson, 1975; Yeager, 1992).
Morphologically, proboscis monkey hair color varies. In the shoulder and upper
back reddish brown. The ends of her hair brownish red, while two-thirds of its
gray. Yellow-gray backs, colored belly powerful the ningan or gray, sometimes
brownish yellow section. Hands and feet yellowish white, reddish-brown head and
neck grayish white areas. Characteristic proboscis that is easily recognizable
is the size of a large nose and long padajantan (Figure 1) and tapered at
betina.Adanya coat color variation in body parts as a basis for distinguishing
sub-species that exist proboscis, which Nasalis larvatus larvatus and Nasalis
lavartus orientalis (Kern, 1964).
1.2. Support Research in Conservation
Program proboscis monkey
Some aspects of the research has been done
such as proboscis monkey populations in Tanjung Puting concerns and feeding
ecology in mangroves (Bismark, 1980, 1989), ecology and social behavior of peat
swamp forest habitat in Central Kalimantan (TN Tanjung Puting) (Yeager, 1989,
1990 ), social organizations in mangroves Sarawak (Bennett and Sebastian,
1988), distribution, habitat and population in Sarawak (Salter et al., 1985),
and their distribution in different habitat types (Meijaard and Nijman, 2000).
In this case, in-depth study of the
ecology of proboscis monkeys living in mangrove habitat has not been much done.
However, Sunjoto (2004) has reviewed aspects of the ecology and habitat of
proboscis monkeys living in the forests of Borneo rubber Selatan.Laporan
previous research has many functions and propose and discuss the benefits and
potential of mangroves. Mangrove forests are one part of the estuarine
ecosystem with high productivity ter main mangrove ecosystem type
"riverine" (Lear and Turner, 1977; Mitsch and Gosselink, 1984) and
has the function of tissue preservation ekologisdalam eat (Dingwall, 1983). As
in New Guinea there are 204 species of fish depend on mangroves, while the
northern part of Borneo is known to have 40 species of 33 genera of fish
(Collette, 1983).
In addition to the ecological value of
mangroves also have value in coastal protection, wildlife habitat, aesthetic,
and economic value (Dingwall, 1983). Limited distribution and extensive
mangrove forests and the high value of importance of these ecosystems boost
conservation efforts, especially mangrove forests as wildlife habitat.
Therefore, the results of the study are now more digging and socio-economic
aspects of biodiversity in the rehabilitation of mangrove areas for the purpose
of preservation of function as a buffer zone waters of life. Distribution and
extensive mangrove forests in Kalimantan (Figure 2) is very limited ie 383 450
ha (Darsidi, 1984) and the habitat only proboscis of 15,600 ha. In 1995 the
only remaining habitat is 9200 ha. A decrease of 41% has an impact on habitat
and population distribution uneven proboscis (Salter et al., 1985; Yasuma,
1989; Bismark, 2004) and the changing nature of the proboscis are less tolerant
of habitat destruction (Wilson and Wilson, 1975) and increased land
requirements for agriculture, settlements and utilize mangrove forests along
the river. This is a major concern to the population keterancaman proboscis.
Food resources in primate habitat is an
ecological factors that determine the sustainability of primate populations
(Bismark, 1994, 2004; Meijaard et al., 2006). The quality and quantity of food
can affect behavior and social organization of primates (Raemaker and Chivers,
1980), wide area roaming and affect the movement behavior of primates (Whitten,
1982), and also affects the feed as a source of energy, growth and
proliferation. Potential feed also affects the size and population of the
proboscis monkey (Iskandar, 2006). Given the magnitude of the role of food
resources on the behavior and survival of primates, the proboscis monkey
population management and habitat can be determined based on the parameters
feeding ecology of the relation of environmental factors on the pattern
perilakumakan habitat and daily activities in the habitat (Bismark, 2004;
Sunjoto, 2005). Given that many proboscis feed stored in mangroves, the
mangroves will rescue rescuing proboscis monkey populations. In the proboscis
monkey conservation program required information about behavioral and
environmental factors that support habitat to feed the needs and safety of the
hunt.
1.3. Biophysical Environment Habitat
proboscis monkey
Mangrove forest ecosystem as proboscis
monkey habitat (Nasalis larvatus) differs from the peat swamp forests and other
riverside forest, where mangroves are influenced by tides with salt levels
(salinity) high. This situation affects the soil drainage and soil salinity
conditions (Lear and Turner, 1977).
Tides also act as carriers of nutrients
and stabilize the salinity of the soil, so there is no kompetisitumbuhan
mangroves with plants that are not tolerant to high soil salinity. Besides the
river also plays a role in regulating the physical and chemical properties of
mangrove forests that occur vegetasiyang differences exist on the edge of the
river with forest on the inside (Mitsch and Gosselink, 1984). In addition to
its effect on physical properties, soil chemistry, and vegetation, the river
which is the habitat of predators and parasites potentially carry pollutants
that will affect the lives of proboscis. The physical environment of mangrove
forests, as mentioned above akanberpengaruh on productivity, distribution,
density, and diversity of plant. This condition will determine the quantity and
nutritional quality of food sources proboscis, ie protein, fat, crude fiber,
carbohydrates, and minerals from the leaves, flowers, and fruit. Furthermore,
the quantity and quality of food resources will form a pattern of behavior
proboscis. Primates are very selective in choosing a suitable habitat with
potential food source that can meet their needs, so that the feed source tree
has a positive correlation estimators dandapat a population of Hylobates
(Iskandar, 2006).
In theory, the source of food is the most
important factor in the selection of the habitat. Animals in the selection of
the preferred habitat can be viewed from two aspects. First, genetically, each
individual is able to react to environmental conditions so as to make the
selection of suitable habitat. Second, the relationship between types or groups
as well as the process of learning right from a young age or learning from the
experience gained from older individuals. Both of these factors can be seen in the
pattern of cruising and space odyssey (home range) corresponding to primate
social behavior and the behavior of the environment makandalam habitat
(Whitten, 1982; Bismark, 1994).
The diversity of species and the physical
structure of the forest as a habitat, separately or bersamasama will provide a
variety of niches (niche) potential ecological distribution of wildlife,
especially the volume of the canopy as a producer of primary products
relativity that will determine the secondary productivity (the animal). Lowland
tropical forests in Asia, Africa, and America, produce dry litter as / of 6-7
tonnes / ha / year, in Malaysia around 7.5 tonnes / ha / year (Raemakers et
al., 1980), and mangroves Young leaves can produce 5 tons / ha / year (Clough
et al., 1983). The physical structure of the forest is formed due to the
difference in height of trees by type, age and nature of the growth. This forms
the stratification that creates ecological niches, such as the difference in
height and the position of the primates eat simpatrik the tree. A variety of
ecological niches will give the other herbivorous mammals bagisatwa danburung
to find food. These animals can help accelerate forest regeneration through
seed dispersal of plants as food scraps, either by primates and birds as well
as speed up the process of recycling the essential elements into the
environment. Proboscis monkeys can increase biodiversity of plants in their
habitat in a way that reduces the number of seeds eaten dominant vegetation,
thus providing an opportunity for yangtidak dominant plant seeds to grow and
develop (Yeager and Blondal, 1992).
Indonesia tropical forest has a high
diversity of primates, both primate leaf eating (folivorous) and fruit-eating
(frugivorous). This is supported by the ecology of each species of primate in
the use of different food sources according to the type of food you like, use
forest canopy stratification, and movement patterns (Curtin and Chivers, 1979;
Meijaard et al., 2006). A high diversity of plant species in their habitat,
especially primates simpatrik will allow the high diversity of food in space
and time. Although the primary forest there are many big and tall trees, the
animal life more generally ranging in height between 25-35 m and 15-30 m,
except in certain habitats such as river (Curtin and Chivers, 1979).
Mangrove ecosystem with all the
interactions and inter-relationships of components in it related to population
growth is the availability or potential animal feed available in the habitat.
Arboreal primate populations is highly dependent on the density of trees
(Bismark, 2006; Iskandar, 2006). Therefore, conservation of habitat and
populations of rare endemic species including primates proboscis begins with
knowledge of the status and potential of tree stands that serve as feeding and
sleeping tree that determines the carrying capacity of the habitat.
Primates in natural food sources can be
grouped into three categories: vegetative parts of plants, the reproductive
parts of plants and animals. In this case can be a leaf, a flower, fruit, bird
eggs and insects, and plant parts such as bulbs with the same nutritional value
of fruits that contain protein, free amino acids, vitamin C, and sugar is
beneficial. In general, the vegetative parts of plants and trees to climb right
dima primates, including young leaves or old leaves (Chivers and Raemakers,
1980). Orangutans can eat bark (Rijksen, 1978) as well as the types of
squirrels (Whitten and Whitten, 1987).
Problems in feeding primates in tropical
forests are phytochemical compounds that are toxic, cellulose, and lignin
(Oates, 1977, Hoshino, 1985). Leaf-eating primate species, especially of
children Colobinae tribe, the microbes digest cellulose bersimbiose with
gastric (Bauchop, 1978), but this process will be less effective when there is
a high lignin content (Oates, 1977). Phytochemical compounds found in the
leaves (classified as secondary compounds) affect the level of preference
mammalian herbivores to eat. Plants contained in nutrient-poor tropical forests
contain many phytochemical compounds as compounds for defense, such as against
insects (Curtin and Chivers, 1979). Secondary compounds may be either
non-protein amino acids, alkaloids, and phenols which all affect the feeding
behavior of animals (Hladik, 1978). Tannins, as found in mangrove leaf contains
compounds that can mengkoagulasikan component proteins and digestive enzymes,
but in some primate species seen no significant correlation between the
intensity of eating with the secondary compound (Whitten and Whitten, 1987).
The difference in feed composition can
occur in different habitats, especially the differences in soil fertility will
affect the diversity of plant species. The difference in feeding behavior is
also seen in the proboscis of different habitats such as mangroves National
Park (TN) Bako and Wildlife (SM) Samunsam, Sarawak, where in TN Bako feeding
activity proboscis some 63.2%, while in the mangroves SM Samunsan 13.1% (Salter
et al., 1985). Proboscis as leaf-eating primates that are like ruminants
(Hladik, 1978) takes the feed ratio of protein with low roughness fibers
(Bennett and Sebastian, 1988). In the dipterocarp forest, with nutrient poor
soil produce leaves with a ratio of protein and fiber are low anyway, but other
elements such as mineral deficiency, causing proboscis monkey can not occupy
such habitats (Bennett and Sebastian, 1988).
The mangrove forests that receive nutrient
inputs from rivers and tidal water from the sea, through the deposition and
decomposition by microorganisms (Lear and Turner, 1977) led to soil nutrient
rich mangrove forests, such as the elements of N which plays a role in
increasing the productivity of mangrove leaves (Clough et al., 1983). In
addition, mangrove leaves contain more minerals that are needed by ruminant
animals. In forest habitats, primates feed spread vertically and horizontally,
thereby primates will move vertically or horizontally to find food in
accordance with the level of preference to the type of feed, especially
associated with higher levels of nutrition and safety, and to avoid competition
(Bismark, 1994).
In this book the authors presented a
summary of the research results to the population and behavior of proboscis
monkeys in the mangroves and the results of relevant research experts including
the results of research in the doctoral program in which the author
participated as Team Promoter. As a preliminary description above, ecology and
conservation studies will be directed at potential proboscis monkey habitat,
distribution proboscis monkey populations, and especially behaviors related to
feed, carrying capacity, and conservation aspects proboscis outside the
conservation area.
CHAPTER 2
HABITAT
2.1. Types and
Distribution of Habitat
In general
Borneo endemic proboscis monkey forest habitat like wetlands, both inside and
outside protected areas. In South Kalimantan, proboscis monkey can be found in
the rubber forests outside protected areas adjacent to a water source such as a
river or small lake (Soendjoto et al., 2005). Meijaard et al. (2000) have
identified an area of ecosystem habitats in Borneo proboscis.
If you see a
proboscis monkey habitat in 1995 (Meijaardet al., 2000) is the smallest area of
mangrove forest remaining 59%. These conditions will change in the next year
due to changes in the function of mangrove forests and vegetation, while the
proboscis is very dependent on the mangrove forest (Kern, 1962). Bismark (1980)
reported the presence of these primates are scattered in different habitat
types including rivers impassable peat swamp forest. Proboscis monkeys are also
known to use the existing trees on the edge of his bed-tepisungai for
distribution and habitatprimata so identification is easier to do, including
the use of population census methods proboscis through the river.
Proboscis type
are also found in the river upstream far from the sea, such as Moody River
North Barito (Chivers reports and personal observation, 1994) as well as in the
upper reaches of the dipterocarp forests dominated Sangatta (Bismark, 1997).
Proboscis monkeys are found in small islands, such as Island Shocked covering
247 hectares in South Kalimantan and mangrove habitats are affected by
salinity.
Concerns about
the rapid reduction of the negative impact on the habitat of the proboscis
monkey population decline are habitat degradation of lowland forest, as is the
case in the National Park Mountain Trench. From 1998-2002, widespread decline
in TN Mountain Trench cover greatly increased from about 500 to 8,000 haper
years and in the buffer zone of about 600 ha per year (Curran et al., 2004).
Mangrove forest destruction is caused more by the conversion of land into
farms. Ponds in the mangrove forest in production forests Karyasa PT Kencana
Tarakan in the past 10 years since 1982 increased drastically. Extensive pond
awalnya125 ha increased to 50-fold (Sardjono, 1995) as a form of shrinking
mangrove areas. In general, improvement efforts through the rehabilitation of
mangrove ecosystems in Borneo in the period 1999-2006 has been realized some 4173
ha.
In South
Kalimantan, proboscis monkey habitat includes mangrove forest, mixed forest on
the coast, peat and swamp forest dominated by Galam (Melaleuca cajuputi).
Additionally proboscis monkey populations are also found in the limestone hill
forest and rubber forest (Sunjoto et al., 2005). Distribution of proboscis
monkeys in some areas outside conservation areas in South Kalimantan have been
identified by Sunjoto et al. (2003).
2.1.1. Peat
Swamp Forests
Conditions
proboscis monkey habitat vegetation in peat swamp forest Tanjung Puting
National Park has been reported by Yeager on tahun1989. Analysis of the
vegetation is more focused on potential feed proboscis. With these data it is
possible to develop silvicultural research the types of critical habitat
necessary to rehabilitate or enhance the feed source tree in habitat,
conservation and restoration of degraded forest areas which potentially has a
population of proboscis monkeys.
High trees in
habitats ranging proboscis 6-27 m (average 11.4 m), tree diameter from 9.6 to
45.2 cm (mean 18.11 cm), and basal area from 71.6 to 1604.6 cm ² (average 350.3
cm2) and the broad canopy of 9.1 to 54 m² (average of 22.9 m²). Some 71% of the
tree is a tree identification results feed covering 80.4% of total basal area
and 71.6% of the canopy (Yeager, 1980). Tree species favored by the proboscis
monkey as a source of food is Ganua motleyana (Yeager, 1989; Bismark, 1980).
Proboscis
monkeys in Kuala Samboja, East Kalimantan habitat location adjacent to village
showing the proboscis adapted to the residential areas. Or conversely, there
has been an invasion of land use by the local community proboscis monkey
habitat. In this habitat is the dominant tree Sonneratia casiolaris (Important
Value Index (IVI) of 38.37%), Vitex pubescens (IVI 30.38%), Sandoricum koetjapi
(IVI 24.15%), and Syzygium sp. (IVI 18.9%). There are also rubber tree (Hevea
brasiliensis) 28.95 trees / ha (Alikodra et al., 1995).
Proboscis monkey
habitat around the population with dominant plant Sonneratia caseolaris black
riverside forest Samboja, East Kalimantan highly degraded condition was also
reported by Ma'ruf (2004). Analysis of the detailed mangrove forest habitat in
the forest complex Sangkimah, Kutai National Park has been carried out in 1994.
The analysis was conducted in the area of 1 square km starting from the
riverbank to 500 m into the forest (Bismark, 1994).
2.1.2. Mangrove
Forests
Mangrove forest
habitat example proboscis is populated by mangrove type "riverine" on
the banks Sangkimah National Park (TN) Kutai (Bismark, 1994). Mangrove forest
stretching from the coast up to 2 km upstream. The river banks are dominated by
palm (Nypa fruticans), apiapi tree (Avicennia officinalis), Bruguiera
parviflora and Rhizophora apiculata. Some research sites on the coast there are
coastal forest vegetation dominated by Casuarina equisetifolia. Plant species
were found at the sites listed in Table 5. Examples of this habitat can be a
model of proboscis monkey in the mangrove forest habitat.
In general, there
is a mangrove forest zoning or group of dominant species. Establishment of
zoning is influenced by tides, vegetation away from the beach as well as the
factors geomor fologi, ekofisiologi plant succession and population dynamics
types (Watson, 1928; Anwar et al., 1984). Zonation of vegetation in the study
area is also used to view knowl lompokan types can also describe the
distribution of mangrove tree species as a potential feed proboscis. Examples
of plants that are mapped zoning include Aglaia cucullata, Avicennia
officinalis, Rhizophora apiculata, Bruguiera gymnorhiza, Ceri ops tagal, and
Bruguiera parviflora.
Of zoning is
evident that R. apiculata dominated vegetation even grow along with other
types. This situation can occur because the ground state is relatively dense
forest and peat with the forest floor is dominated by Acrostichum aureum.
Zoning is determined by the type of soil conditions, where the soil is soft or
muddy in the overgrown by Avicennia and Sonneratia, while relatively hard ground
covered with Rhizophora (Sugiarto, 1984). R. apiculata grown inland but
Rhizophora mucronata grows on the muddy ground (Anwar et al., 1984).
Diameter,
height, broad canopy and tree density plays a role in forming the structure of
vegetation. From the observation and measurement of the diameter and height of
trees in the path of vegetation known observation that mangroves can reach a
diameter of 140 cm.
Trees with
diameters> 50 cm with a height of over 30 m, mempunyaifungsi protection and
movement of the proboscis, especially the micro-climate that provides comfort
as a resting place proboscis. Trees with a height between 10-30 m 20-40 cm
diameter reaches 52%. This supports the potential feeding activity and food
resources proboscis.
Extensive
relationships with the diameter of the tree canopy is calculated from the
number of trees in the plot size of 10 mx 100 m, which is designed to describe
the plot diagram mangrove vegetation profile of the river bank up to 100 m into
the forest. From the analysis found a linear relationship between the size of
the canopy (Y, in m²) and basal area (X, in cm ²) with the equation Y = 11.0559
+ 0.01343 x (r = 0.69, n = 78, p <0.005)
Mangrove forest
soils different from other forest land, where there is no drainage, high salt levels,
anaerobic conditions, and has a high organic content. Mangroveini forest soil
formation is influenced by physical factors, through nutrient transport by
tides, waves, and rivers, through the sediment chemical and biotic factors,
namely the process of decomposition by microorganisms (Lear and Turner, 1977).
Salinity and
nitrogen are the ecological factors affecting mangrove forests harbor Growth
(Peng and Xin-Men, 1983) and the parameters of Na / K is the chemical factors
that can affect seedling growth in addition to salinity (Bhosale and Shinde,
1983). Sukardjo (1987) analysis of soil C and N content of mangrove vegetation
relation to the number of trees in the plot observations.
In the mangrove
forest TN Kutai, look no apparent difference between the levels of N and C in
each zone, as well as the Na / K and salinity. From this analysis it can be
said that the organic content, Na, and K and soil salinity concentrations were
evenly distributed in riverine mangrove forests (Table 7). This condition can
be caused by zoning R. apiculata were very dominant. Besides the dominance of
A. aureum as the physical plant can be influential in pengendapanunsur
nutrients into the soil. The concentration of C in the soil between 4.996 to
5.995% showed a relatively stable concentration where the concentration below
2.86% are included in the category of unstable (Soegiarto, 1984). High levels
of forest soil organic matter was made possible due largely dominated peat soil
structure and higher production of litter and nutrients from the river.
Soil N levels in
the river mangrove habitat proboscis monkey habitat ranges from 0.904 to
1.325%. Sukardjo report (1987) indicates that the mangroves have Indramayu soil
N levels from 0.08 to 0.203% while Soegiarto (1984) put the figure ranges from
0.28 to 1.26% on the island of hair. The high element of C and N in the soil
allows the mangrove vegetation grows so well that the density of trees in the
mangrove forest that has not been disturbed reaches 755 trees per ha with high
forest productivity. The results Peng and Xin-Men (1983) showed a correlation
between the height (Y) of mangrove forest with a concentration N (X) is
contained in the 20-40cm soil layer. This can be shown by the equation log Y =
0.9373 + 3.124 X. Judging from the organic content (C), zoning C. tagal have
the highest soil C levels of 5.995%. The condition was also reported by
Johnstone (1983), while the value of Na / K higher in zoning Rhizophora
(Spenceley, 1983).
Proboscis monkey
habitat dominated by R. apiculata (number and spreading) can achieve important
value index (IVI) of more than 200% to the level of the trees and small trees.
This condition is also seen in the mangrove forest dominated by R. apiculata in
Sulawesi, which demonstrated high IVI, as in the River Ranu (Morowali, Central
Sulawesi) with an IVI tree R. apiculata by 203.58% and 249.60% IVI pole with a
density of 300 trees / ha (tree diameter> 10 cm) (Darnaedi and Budiman,
1982).
Salinity is not
too important to the survival of mangrove tree species, but it is necessary to
avoid kompetisidengan types that are not tolerant to high salinity (Mitsch and
Gosselink, 1984). At low salinity soil (0.876%) will be formed zoning R. pure
apiculata (Sukardjo, 1987). Conditions of soil salinity is relatively high
(6.44 to 7.475%), supporting the establishment of another zonasijenis although
still dominated by R. apiculata. In conditions of high soil salinity, plants
store the salt in old leaves before autumn and the Avicennia, salt gland can be
removed through the leaves (Lear and Turner, 1977; Mitsch and Gosselink, 1984;
Field et aI., 1984) .2.2. Habitat degradation Degradation of habitat proboscis
happen relatively quickly due to the high economic value. Riverside habitat is
the area traversed by the first people to invade land behind, which was opened
for settlement and agricultural land. Similarly, the formation of the township
that all these are forms of habitat degradation are common in the mouth of the
river upstream to the riparian forest habitat potential proboscis.
The development
of residential and agricultural areas along the edge of the forest and the
river causes a decrease berpencarnya proboscis monkey population between 15-40
km (Bismark, 2002; Ma'ruf, 2004). In the end, proboscis monkeys are left, which
should be the original inhabitants, dianggapsebagai agricultural pests by most
people (Sunjoto et al., 2005). In 1990 the proboscis monkey habitat was
reported missing seluas49% and in 1995 39% reported living and only 15% of the
original habitat in protected areas (Meijaard et al., 2000). Habitat is
estimated to have decreased about 2% a year.
Habitat
destruction is not just happening outside the conservation area, has even
entered the conservation area. In 2001 the lowland forests of Borneo conservation
area has been degraded by over 56% (Curran et al., 2004). Habitat degradation
seen in the island Startled, where only 10% and 90% forested areas into
agricultural areas (Meijaard, 2000). Habitat is the only plant trees 20-50 m
from the edge of the river with a tree density of 150 trees per hectare
(Bismark, 1997). Large forest fires occurred in Tanjung Puting National Park in
1997 led to habitat lost about 75% and in 1998 wildfires Kutai National Park
menyisakanhabitat wooded 5%.
Proboscis monkey
habitat specific, limited feed resources, and competition with other primates,
causing proboscis lebihsensitif against habitat destruction. Based on the
impact of increased traffic flow streams, forest utilization in the form of
timber management and habitat destruction accelerate acceleration is driven by
forest fires, illegal logging, land conversion of peatland forests into
plantations and farms.
Forest damage
caused by illegal logging, gold mining impacts, and the emergence of land
plants in the forest pakupakuan inhibiting forest regeneration has also
contributed to habitat degradation proboscis. But the kind of damage a very
negative impact on the habitat of proboscis monkey is the utilization of
mangrove forests. Although the existence of fairly extensive mangrove on the
beach, but the proboscis monkey habitat is very limited in the type of riverine
mangrove.
Identification
Meijaard (2000) suggests some priority areas in the proboscis monkey habitat
protection and pressure that cause degradation of habitat in Borneo. Habitat
degradation and its impact on hunting and konversilahan proboscis monkey
population has reduced by 90% in 20 years and in the mangrove forest decline
3.1% per year (Bismark, 2002). In addition there has been a process of
adaptation to the proboscis which pushed oil but can not be separated from the
need to water sources, lakes and streams with different riparian vegetation as
a river or small lake (Soendjoto et al., 2004).
2.3. Fauna
Habitat Diversity on proboscis monkey
Borneo
rainforest habitat has a high diversity of fauna, where more than 420 species
of birds and 222 species of mammals live in the forests of Borneo. Over 50% of
birds and more than 35% kind of mammals are endemic Borneo, where 60% and 81%
of bird species of mammals live in the lowland forests (Curran et al., 2004).
Biodiversity in
Borneo is a large part of Indonesia's biodiversity, including flora and fauna,
which became the basis for the development of capital diverse cultures and
tribes. A variety of ceremonial and ritual activities commonly carried by many
tribes in Indonesia can not be separated from the use of biodiversity.
Biodiversity (genetic diversity, species, and ecosystems) Indonesia is the
highest in the world, and these natural resources as capital construction, but
the problems encountered is how to sustainably utilize biodiversity (Sumardja,
2000).
The threat to
diversity of fauna in Borneo is also triggered by the El-Nino causes drought
affecting the fruiting season changes that are inconsistent with the reproduction
of fauna as determinants of population sustainability. Additionally
konsesihutan based timber, plantation establishment, and weak oversight has
increased habitat fragmentation and deforestation fauna (Curran et al., 2004).
2.3.1. Mammals
Generally,
nutrient poor soil in Borneo especially in upstream forest dominated by
dipterocarp forest. Low soil nutrient impact on plant productivity
terutamatumbuhan animal feed sources (Meijaard et al., 2006), so the low
herbivor animal biomass. In this case herbivor large animals, ungulate needs
salt (salt licks), including proboscis monkeys require high bermineral feed
sources such as mangrove forests. The low mineral dipterocarp forest land
affects the distribution and stability of herbivorous animal population
(Bennett and Sebastian, 1988).
Low levels of
soil fertility causing plants produce secondary compounds that leaves less
desirable species, but there are species that are not affected by herbivor
elements. Element is essential for vertebrate Ca as a key mineral. The low
biomass, limited distribution and population herbivor cause mammalian predator
population is low. In Borneo, for example, only found one kind of tiger, the
clouded leopard, Neofelis nebulosa which tracks ever found in the forest floor
under the bed where trees proboscis (Bismark, personal observation).
Mammals like the
proboscis monkey habitat in peat bogs include orangutan (Pongo pygmaeus),
Macaca fascicularis, Presbytis spp., Hylobates agilis, and Helarctos malayanus.
While in the mangrove forest mammals are more common are Macaca fascicularis
and Presbytis cristata.Sistem existing mangrove tree roots above the soil
surface is quite difficult for terrestrial animals such as Cervus unicoloruntuk
moving on the forest floor, while small mammals linsang type is dominant on the
forest floor mangrove.
2.3.2. Bird
Proboscis monkey
in the mangrove forest habitat with a high density of trees and has several
strata according to the growth of saplings and poles make good habitat for bird
species. Diversity of organisms in a community means a dalampendugaan the state
of the environment of the community. In relation to bird species diversity in a
community, Karr (1975) has suggested the hypothesis that species diversity in a
community has a correlation with the existing resources in the community and
also correlated with productivity maupunlaju flow of energy contained in those
communities.
Limited number
of birds in tropical forests due to the complexity of the interaction between
community ecology of birds with habitat. Among ecological problems closely
related to bird community succession rate is a factor that has been achieved by
a forest, a state-related rainfall and musimbuah insect populations, habitat
diversity and the relationship between birds and other wildlife. The difference
between the habitat diversity of other habitats is largely influenced by
physical factors such as climatic conditions as well as the vertical structure
and composition of the canopy in each habitat (Bismark, 1986).
Mangrove forests
have lower species diversity and rare are the fleshy fruits as bird food,
especially fruit-eating birds. The high diversity of bird species in the
mangrove forest ecosystems due to habitat conditions are relatively stable in
undisturbed forest so there is consistency of food sources, especially insects
and stable microclimate.
In a community
that has a high diversity of tree species there are more kinds of rare birds
and birds typically found in the community. When the community dengankeragaman
low tree species diversity of bird species are high, many species is the type
that has spread widely, especially to micro-habitat (Thiollay, 1992).
According to
King et al. (1975), from 42 species of birds are found in the mangrove forest
dominated by R. apiculata, a bird species that live only in mangroves (2.4%),
which is Cyornis rufigastra. While other types have broad habitat includes
lowland forest, secondary forest, and some even live in more open habitats.
Ciconia
episcopus, Egretta, and Anhinga use mangrove forests as a place to rest. While
Leptoptilos javanicus using tree B. mucronata as a nesting site. The types of
Cuculidae family, Picidae, Muscicapidae, Eurylamiidae, danSylviidae, primarily
insectivorous, feeding in the mangrove forest. In the dry season in Borneo, the
insect population increases hingga3-9-fold as bird feed source (Pearson, 1975).
On bird habitat,
state tree canopy vertical stratification, leaf density, wide canopy, and the
number of trees will affect the diversity of bird species in each stratum. The
similarity structure of the canopy at different places will allow the
similarity number of bird species, and conversely the similarity structure of
the leaves, but there are other types of animals as birds rivalry will lead to low
diversity of bird species.
The high
frequency of birds in strata 0-15 m can be caused by a condition suitable
microhabitats, because at the height of the easier birds to fly doing
foragingseperti looking for food. In addition, the editorial meeting at a high
level serves as a protection against micro habitat stability in the lower
classes so that the balance of temperature and humidity under tidakberfluktuasi
higher strata. Based on observations in a single day fluktuasisuhu difference
causes birds migrate from the top to the lower strata strata.
2.3.3. Reptiles
Reptiles that
influence the proboscis monkey populations in antaranyaadalah Alligator River
Tomistoma schlegelisebagai predators (Galdikas, 1985), Varanus salvator, and
Ophiophagus hannah (cobra). Varanus salvator (lizard) more frequent contact
with the ground or the floor of the forest, so the potential for the spread of
ectoparasites proboscis monkeys, because there is often a proboscis monkey in
the forest floor during the lunch break. Types of ectoparasites that live on
and in the body of lizard habitat is Aponomma lucasi. Lizard foraging behavior
in humid areas close to water sources allow infected ectoparasites lizard
blood.
Parasites can
reduce blood levels of iron in the blood and anemia that results in the process
of respiration and metabolism (Moen, 1973; Baker and Warthon, 1952). Reptiles
living on the forest floor also possible exposed to different types of
endoparasites, such as bacteria that live pencernan canals. Graves et al.
(1988) have analyzed the types of bacteria found in the feces (stool) reptile
on Krakatau, which was discovered bacteria Citrobacter, Enterobacter,
Pseudomonas, Acromonas, and Escherichia coli.
Movement,
cruising areas, and a lizard activity is strongly influenced by the ambient
temperature. For that lizard occupies microhabitat under large rocks to
maintain balance body temperature (Christian et. Al., 1983).
Behavior lizard
in search of microhabitat on the rocks and moist areas near water sources that
can support the development shady louse populations (ixodidae) where the female
louse eggs hatch in the soil will soon find landlady. A. lucasi has a wide
distribution, so the possibility terserangnya lizards and snakes by ticks is
large enough decline in habitat quality, especially larval ectoparasite A.
lucasi, most likely it can affect proboscis.
Ixodidaedapat
cause health problems in humans or animals. In animals can cause anemia and can
transmit the disease typhoid, tularemia, and "Q fever" in humans
(Baker and Wharton, 1952).
2.3.4. Aquatic
Fauna
Fauna that live
in habitats in the waters around the proboscis monkey in the mangrove forest
habitat, especially shrimp, crabs and other types of shrimp ikan.Kepiting and
include sources of animal protein consumed by the proboscis. Fauna river
habitatbekantan economically valuable peat swamp forest is the arowana fish
(Sclerophagus formosus) is now the population is threatened by water pollution,
high traffic in the waters of the river, and fishing in nature.
In addition to
environmental problems such as water pollution, deforestation also affects the
diversity and populations of fish in the upper river, especially riparian
forests that are part of the management of production forests. The results of
studies comparing the effects of conventional forest management (CNV) and the
system reduce impact logging (RIL) to the flow of nutrients and water quality
in the headwaters in East Kalimantan Malinau showed significant differences.
The high N / P
ratio and the residue suspended in water RIL showed high organic matter
produced and dilepasdari RIL logged forest as a source of minerals and
nutrients for marine life. Nevertheless, the value of N / P ratios with numbers
above 20 still indicates that the waters of the river is in the condition
oligotropik nutrientdan first manufacturer of low-input, high transparency, and
spread evenly fish species (IETC, 1999).
Seturan River
research station, where there are areas Malinau RIL and CNV experiments have
identified 28 species of fish.
2.3.5. Parasite
Interaction of
primate populations by parasites would have a negative effect on population
growth and resilience. Parasites can decrease energy efficiency
pulamengakibatkan host animal metabolism and decreasing function of the
existing systems of the body, such as the circulatory system and the body's
heat balance (Moen, 1973).
Endoparasites
proboscis can be known through feces and can diidentiftkasi in the laboratory.
While it is known that the dominant type of endoparasites proboscis is Trichiuris
worms. Besides the proboscis monkey feces found Ascaris eggs and other types of
nematodes.
Trichiuris quite
dangerous in primates, and this type generally found in Macaca fascicularis
(Matsubayashi et al., 1981), orangutans and chimpanzees (Rijksen, 1987). Other
types of endoparasites in the digestive tract orangutan is Strongyloides,
Enterobius buckleyi, Arborviata Caucasian, Pithecostrongyloides,
Trichostrongyloides, and Gasterodiscoides, and the rehabilitated orangutans are
found Ankylostoma basiliensi (Rijksen, 1978). While on M. fascicularis found
Oesophagustinum, Streptopharagus, Strongyloides, and Bertiella (Matsubayashi,
1981). In the mangrove forests, proboscis monkeys living together with a group
M. fascicularis and therefore it is possible parasite found in M. fascicularis
also found in the proboscis.
CHAPTER 3
GROUP STRUCTURE
In nature there
are no mammals living soliter.Paling really no need for couples in marriage or
kebutuhanpemeliharaan, such as feeding in infancy. Thus, animals need social
relationships, and social life of primates dapatterlihat through social systems
with flocking.
Important
factors that affect large groups and social organization of primates is the
source of feed (Jolly, 1972; Clutton-Brock and Harvey, 1977; Gittin and
Raemakers, 1980), predator pressure (Jolly, 1972; Tilson, 1977), and the effect
of parasites (Freeland , 1976). According to Terborgh (1984) major primate
groups are formed by the result of the interaction with the environment types,
covering the body and demographics, as well as in gender selection. Primates
are polygamy, and in life related to competition selected through a huge
difference in the body and muscle growth type males (Clutton-Brock, 1977).
3.1. Morphology
and Geometry
Proboscis adults
show differences in the shape and body size between males and females (sexual
dimorphism) (Kern, 1964; Bennett and Sebastian, 1988; Yeager, 1989). This
difference is seen in the body and the shape of the nose. Types of males have a
relatively large nose, external genitalia, there are areas of white triangles
on the hips (Figure 10) and the development of strong muscles. Females are
relatively smaller, nipples distinctly smaller and pointy nose. Male body
weight ranged from 20-22 kg and 10-12 kg betinaantara (Yeager, 1990). Weight
loss male proboscis monkey in the mangrove forest ranges between 22-27 kg and
females between 8-17 kg (Bismark, 2005).
The difference
in the shape and size of the proboscis of male and female body (known as the
geometry of the body) include the length of the body and the head (or height
when sitting), shoulder width, tail length, and body surface area. Sitting
height, shoulder width, and tail length parameter is specified as a simple
geometric body proboscis used to differentiate age classes bekantan the animal
rested in a seated position with the tail hanging down.
The difference
in male and female proboscis geometry seen in the shape of the nose, where the
nose larger males and females more pointed. In addition, female shoulder width
(17.5 to 18 cm), equal to 2/3 the width of the shoulders males (23-32 cm) tall
and females (55-58 cm), equal to 4/5 of the height of males (60-73 cm) so that
the female's body surface area equal to 2/3 the surface area of the male
body. Adult female body size is almost the same as the male half of adults.
According to
Bennett and Sebastian (1988) a large body of proboscis half grown more than 3/4
of the adult body, while the juvenile is less than 3/4 parts of the adult body.
Although half the adult male sitting height equal to 3/4 of an adult male, but
the shoulder width equal to 2/3 of the adult and body surface area together
with 1/2 of the total adult body.
Apart from the
size of the body and the signs are dikemukakanBennett and Sebastian (1988), determination
of age-class proboscis monkeys can be seen from the comparison of long tail
with a seat height (E / Td) and seat height with wide shoulders (Td / B). This
comparison can be observed in the field when proboscis in a resting state with
posisiduduk.
For adult age
classes and half adults, the value of E / td sekitar1 where the height and
length of the tail is relatively the same, while for older age class, tail
length is 1 ⒟
height while the baby, his tail more than 13/4 high seat.
Index Td / B for
males is 2.63 or height equal to 22/3 the width of the shoulders. Index on
adult female with the male half of adult index is 3 or higher seat 3 times the
width of the shoulders, while for older age classes and baby, body length and
head equal to 22/3 the width of the shoulder, similar to the index in adult
males.
Geometry
parameters are easily observed in the field and is closely related to a large
body of proboscis which is characterized by body surface area is high seat and
shoulder width. The analysis of these parameters is determined mathematically
by the variety and number of samples available. Of samples available, male and
female proboscis monkey can represent each age class, although not in the same
amount.
The surface area
of the limbs (legs and arms) proboscis average is 52.65% of the body surface
area. In deer weighing 60 kg, expansive movement members only 36.9%. In this
case, the release of heat by convection through the legs of a deer is
relatively large compared with a finish on kaannya (Moen, 1973). Proboscis
monkeys are arboreal conducting activities with relative limb surface area
larger than a deer (52.65%) allowing the release of body heat by convection
through the relatively greater limb at the time of quadrupedal movement
(movement by using the four legs).
According to the
observations, proboscis monkey more active break after eating (42.3%). At the
break of ruminant animals process food in the digestive tract and is currently
too much spite heat through the digestive tract (Moen, 1973). In this
connection, proboscis monkey has a larger volume of the digestive tract of
other leaf-eating primates, ie 8371 cm ³, while the type Presbytis melalophos,
P. rubicunda, and P. obscura respectively 3168, 3113, and 3805 cm ³ (Bennett,
1983). To maintain temperature balance, proboscis monkey to rest or sleep in a
sitting position with the limb held to the body to release heat by convection
and evaporation can be reduced.
3.2. Social
Systems
Factors
affecting jumIah individuals in primate social groups and organizations are
population density, food resources, predators, and an enabling environment to
nurture children well. A very influential factor among the above factors also
depends on the type of satwanya. It is also influenced by the behavior phylogenetiksatwa
(Raemakers and Chivers, 1980) or gender, such as female behavior is highly
dependent on food resources compared with males (Bennett, 1983).
The main factor
that determines the social behavior of primates is the selection of the feed
and the tendency of mammals to adopt polygyni (Raemakers and Chivers, 1980). In
birds, monogamous system actually acts as males will do anything, especially
when females lay eggs (Clutton-Brock and Harvey, 1977; Raemakers and Chivers,
1980).
Groups of
primates in small quantities with a narrow territorial, seldom scatter in
search of food, forcing kelompokini form monogamous social systems (groups of
2-6 people), especially males, as the females are not able to maintain their
own territory. Maintain territorial behavior will allow to ensure their
children in order to grow (Raemaekers and Chivers, 1980). Presbytis clustered
in relatively large quantities (5-19 people) looking for food in a space
odyssey (home range) is split by forming groups of children as an adaptation to
the limitations and the spread of food resources (Curtin, 1980).
Predator also
affects social behavior. Primates in large groups would communicate better at
detecting predators and food resources thus increasing rescue efforts against
predators (Sussman, 1977). It is very important to the physical structure of
the habitat is disturbed. Disturbed habitat can affect changes in the
composition and number of individuals in the proboscis monkey (Yeager, 1991).
3.3. The
composition of the Group
Proboscis monkey
populations are scattered from coast to forest dipterocarp-dominated upstream a
distance of 70 km from the coast (Bismark and Iskandar, 2002), in the North
Barito Moody River, 600 km daripantai, and even in South Kalimantan jungle
rubber which is 300 km from the coast ( Soendjoto et al., 2005). Proboscis
monkey population found scattered unevenly, in East Kalimantan Sangatta River
(1986) spread across the 4-25 km (mean 10.6 km) and dispersed within 18-40 km
(Bismark and Iskandar, 2002).
Carrying capacity
of the habitat of the magnitude seen in the population age class structure
proboscis. Proboscis monkey populations constructed by groups of proboscis with
the number of individuals varies greatly, which is between 6-16 individuals per
group (Bennett and Sebastian, 1988), 3-17 individuals (Yeager, 1992), and 17-25
individuals (Bismark, 1994 ). Shocked at the island which covers 247 ha once
there are 19 groups of proboscis monkeys by the number of individual groups
ranged from 4-24 individuals (Bismark, 1997).
The average
individual groups of proboscis monkey in the mangrove forest Kutai National
Park is 21 individuals (17-25 people). The number of individual groups of
proboscis monkeys are quite varied between 6-16 individuals (Bennett and
Sebastian, 1988), 12-27 individuals (Kern, 1984), 11-56 individuals (Ruhiyat,
1986), and 3-17 individuals (Yeager et al. , 1989).
In general, the
number of members of the primate group waktutertentu intervals have the same
social system. For the group with the possibility that individual variation in
the amount of 5-25 have more than one social system. Dimak social system is a
multi-sud lazy (many males), one male with several females, the system
switching between members of the group (fission fusion), polygamy, monogamy,
and solitary.
There are
differences of opinion about the social system proboscis. Kern (1964) argued
that the social system proboscis slightly loose so that the split and merge
between members of different groups. With this system it can be found that a
group of more than 60 individuals (Kern, 1964; Bismark, 1986). Salter et at.
(1985) found a group of up to 50 individuals who then split up when leaving the
bed and the location of this group can be classified in fussion fission.
Yeager (1989,
1990, 1991) reported that harem social system is stable while the proboscis
before Kawabe and Mano (1972) dalamYeager (1990) describes that the system is a
multi-male proboscis monkey. When viewed from a number of individuals, groups,
proboscis varies among individuals 17-25 then in primate social systems
proposed Terborg (1984), the possibility of a social system proboscis is
multi-male.Sistem harematau social proboscis is more determined on the amount
and stability of the males in the group.
Haremterlihat
system while formation of subgroups. Social system proboscis monkey in the
mangrove forest is more directed to a multi-male, where in each group there is
more than one adult male. Comparison of individual adult males with adult
females (seksrasio) is 1:2,55. In addition, the movement of members between
groups also occurred (Bismark, 1994). Ruhyat study (1986) showed that the group
has a male proboscis monkey studied adults between 1-5 individuals to groups of
11-56 individuals.
The role of
males in the group seksdimorphismeadalah to defend his territory, especially
related to food resources. For those types of primates are less selective feed
resources, social organization will lead to a large group of multi-maledan sex
dimorphismedan even fission-fusion social system (Raemakers and Chivers, 1980).
The difference
in social systems proboscis monkeys closely related to the condition of habitat
and food resources. Proboscis monkey in the mangrove forest habitat
riverinememiliki characteristics of low species diversity but high density, and
are the dominant tree species, namely R. apiculata the principal food sources
(71.9%) in the feed composition proboscis. This species is dominant and form
density zoning with 391 trees per ha and has the quality of organic and mineral
content is good. This condition can avoid competition among males in
maintaining the space odyssey and this is seen also in the narrow space odyssey
of the proboscis is 19.4 ha. From this analysis shows that the condition of the
habitat, the quality and quantity of food resources in the mangrove forest can
reduce competition among males that leads to the formation of multi-male
groups.
Competition can
also be avoided by utilizing the ability of proboscis monkeys in the forest
floor as a place to rest and simply split the group members form a child (sub)
group is a relatively small number of members. Formation of sub-groups
merupakanstrategi in eating behavior. The use of the forest floor to run a
benefit for energy savings and ease of separation and incorporation of
sub-groups (Raemaker and Chivers, 1980). Behavior forming sub-groups and
semi-terrestrial seen also in M. fascicularis (Kurland, 1973; Aldrich-Blake,
1980), Presbytis obscura and Presbytis melalophos (Curtin and Chivers, 1979).
Proboscis
subgroups ranged from 1-19 individuals (average 8.5). There are subgroups that
do not have a male, in this case consists only of adult females, half adults,
teens, and babies; sub-groups there that have one, two, and three adult males.
Freksuensi
formation of sub-groups with one adult male was the highest (43.86%) with a
number of individuals 2-17 or 9.12 average individual. This sub-group formation
occurs when proboscis implement daily activities, foraging, and resting.
Sub-groups can also occur while in sleep location, on the banks of the river.
The frequency of each individual number in a subgroup. Sub-groups have one
adult male with the average number of individuals equal to the 9.12 average of
the proboscis monkey (9 people) with a harem social system (uni-male) were
stable (Bennett and Sebastian, 1988).
Formation of
sub-groups that began proboscis left tree beds associated with the use of time
foraging efficiency and energy savings for movement activity. It is also with
scattered dimung kinkan prestudy main food source Rhizophora apiculata.
Distribution of sub-groups within the 50-150 m (average 96 m) to each other
also aims to reduce the possibility of conflicts between individuals within
groups and is useful in controlling the range area. Merging sub-group re-occur
when going back to the river for the night.
Separation and
merging the individual not only happened on some sub-groups of the same group.
The merger also occurred between pok clogs, especially at the river bed
(Bismark, 1986). In 1985 the group proboscis Sangkimah River joins the Kutai
National Park in the amount of more than 80 individuals and 117 individuals
within 3-7 days (average 5.5 days). By the time the opening has not been much
going on mangroves for ponds and settlement. Merging with another group one
associated with anti-predator behavior (Yeager, 1992).
With the trend
of increasing the number of members in the sub-groups with more than one male
reinforces that the proboscis monkey in the mangrove forests were more likely
to be multi-male.Hal is reinforced with rare (3.5%) agonistikantar males in a
group or between groups . Case agonistic activity can be seen from the tree
branches shake and keep wide open mouth and erect penis in males (Yeager,
1992).
In Table 20
shows that the sub-group may consist of males only and there are separate male
(solitary). Because individuals in the form of sub-groups, it can rejoin the
group. According to Bennett and Sebastian (1988) group of males and solitary
males generally join the harem, especially when you are on the river bank.
The case of the
proboscis monkey fission-fusiondalam seen in a group consisting of 17
individuals, in August 1993 changed to 22 individuals. Changes due to the
addition of 4 adult females with 2 babies and one adult male discharge (Bismark,
1994). Case displacement adult females with infants also dila reported by
Bennett and Sebastian (1988).
Transfer of
adult females from one group to another occurs when the association or group
merging with other groups on the river bank. Transfer of adult females among
different groups also occur in Papio hamadryas monkeys, Colobus badius,
Alouatta seniculus, Alouatta palliata, Gorilla gorilla, Pan troglodiates, and
Colobus Satanas (Bennett and Sebastian, 1988). Transfer of females is
advantageous in avoiding inbreeding occurs, improving the social status of
females, to avoid competition in getting food, and avoid the possibility of
infanticide by the dominant male, and to Menda patkan stable group in order to
maintain good children.
CHAPTER 4
POPULATION AND
DISTRIBUTION
Wetland forests
include peat swamp forests, riverside forests, and brackish forests, considered
to be very potential to be developed into cultivated area to support the local
and regional economy. Utilization can be attributed to the management of
production forests, agricultural land development and development of the
region. In terms of ecosystem, swamp forest acts as a rainwater thus serves as
flood control, drinking water, and seawater intrusion prevention (Claridge,
1994). If the wetland logging done in an uncontrolled, it will have an impact
on changes in the water system so that the frequency of flooding and water
rising rapidly flowing towards the river (Bennet and Gombek, 1991). In
addition, the area has a diversity of wetland flora and fauna biodiversity in
the form of high and serves as a habitat for a variety of wildlife, useful to
support the social and economic life of local communities in the form of
utilization of non-timber forest products such as gum jelutung, fruits, and
River fish community source of animal protein.
Occupational
communities in wetland forest starts from the river as the main means of
transport in the region. Increased frequency of use of the river as a means of
transport led to increased settlement growth and utilization of riparian
forests such as forest and land-use expansion hutanuntuk fields or gardens.
Though forest river border as wide as 100 m are included in the category of
protected area.
In Borneo, swamp
forests along the banks of the river and riverine mangroves on the coast, is a
potential area as wildlife habitat. Proboscis monkeys are one of the
leaf-eating primates endemic to Borneo, whose population is highly dependent on
the quality of wetland ecosystems, especially mangrove forests and riparian
forests, and intolerant of habitat disturbance (Wilson and Wilson, 1975; Bennet
and Gombek, 1991; Yeager, 1992 ). Based on reports McNeely et al. (1990) of 29
500 square km proboscis monkey habitat, 40% have been lost, while the proboscis
monkey habitat that is included in the conservation area is only 4.1%. Because
of the construction of settlements and agricultural areas along the river are
likely to increase, then the impact will affect habitat degradation and endemic
wildlife populations. One indicator of the impact of habitat destruction on
biodiversity swamp forest animals, among them the proboscis monkey population
decline.
Distribution of
proboscis monkeys in Borneo has been documented by Meijaard and Nijman (2000)
at 30 locations and distribution of information obtained proboscis in 123 other
locations scattered in the mangrove forest, small islands, deltas, along the
river, and peat swamp forests. More than 20% of the population scattered in
coastal areas, 18% spread between 100-200 km from the coast, 16% between 20-100
km, and 58% of the population is spread 50 km from the coast, even found in the
300 km from the coast and up to 750 miles from the coast. 90% distribution
locations proboscis lies at an altitude below 200 m above sea level (asl) and
the highest ever reported lies at 350 m above sea level.
Distribution and
proboscis monkey habitat in South Kalimantan have been reported by Soendjoto
(2005) and Bismark (1997), in East Kalimantan by Bismark and Alexander (2002)
and Ma'ruf et al. (2005). Areal distribution priorities proboscis with pressure
up to 1997 have been identified by Meijaard (2000).
Proboscis monkey
habitat are easily visited in South Kalimantan Island include some of the
region in the form Shocked the nature reserve inhabited by three groups of
proboscis monkeys (4-10 and 11 people) with a system of group 1 adult male and
adult female 3-4. The total population on the island in 1996 Shocked is 288
individuals in the area of 267 ha (Bismark, 1997). Around the island
Startled, Puduk Island, and still found the island Temurung proboscis with 7-25
individudan shell Island there are 3 groups of each 7, 7, and 12 individuals
(Bismark, 1997).
Observations
proboscis monkey population in the Mahakam Delta Kalimantan conducted by Ma'ruf
et al. (2005). The study was conducted in the Mahakam River estuary with
geographical 00'26 "06,2-00 '41" 26.2 N and 117'19 "13.7 to 117
'31" 26 BT. Mahakam River estuary known as the Mahakam Delta has a
diversity of wildlife and one of them is the proboscis monkey. The population
of these animals has not been widely known, while in the Mahakam Delta
community activities increased with the development of aquaculture and mining
coal. These activities will affect the habitat and food resources proboscis.
Mahakam River estuary traffic flow sufficient padatoleh freighter coal, timber,
and tankerminyak from Samarinda, may also affect the proboscis monkey
populations. Distribution of proboscis monkey population at the mouth of the
Mahakam River.
Meanwhile
proboscis monkey habitat has now been reduced due to the use of the area by the
river into the ponds, feed the tree utilization and tree to sea RAMBAI
Heritiera littoralis and palm rest. From Figure 15 shows that the utilization
of coastal areas (purple) by the community for the farms, the average farm size
of between 2-5 acres. Preliminary interpretation indicates that 75% of the
Mahakam River estuary has been run into the pond. Kemungkinanbertambahnya clearing
forests for farms or other businesses is huge. The remaining 25% is an area
that is divided into 10% proboscis monkey habitat (there are trees feed) and
15% palm habitat (Ma, Ruf, 2005).
4.1. Population
Proboscis monkey
population surveys have been conducted to researchers at the National Park (TN)
Kutai, among researchers who reported the proboscis monkey population is Wilson
and Wilson (1975) and Rodman (1987). Both reported that the proboscis is hard
to find during their research progress. Wilson and Wilson (1975) found three
groups of proboscis monkeys in Sangatta River estuary and Rodman (1978) found
in the upper reaches of the proboscis Sangatta. The population of proboscis
monkeys in the mangroves are concentrated in the forest complex Sangkimah
River, Gulf of Kaba, Pemedas River, and the river of Padang. Sangkimah River
along 2 km of the coast there are a number of 117 individuals proboscis
(Bismark, 1986).
Proboscis monkey
population density in some areas is reported between 8.3 to 58 individuals / km
² (Table 21). Several studies conducted by the proboscis monkey populations and
Blondal Yeager (1992), Ruhiyat (1986), Yasuma (1989), and Bennett and Sebastian
(1988). Yeager and Blondal (1992) has suggested his analysis that the habitats
are damaged, the density of proboscis 9 individuals per km ², the next is 25
people per km ² on the damage a bit heavy, 33 people per km ² in habitats with
moderate damage, and 62 individuals in habitat with light damage. Proboscis
monkeys are sensitive to habitat destruction (Wilson and Wilson, 1975) so that
the proboscis monkey populations can be an indicator of the level of
destruction of mangrove forests and riverside forests.
The river is
long, fairly wide (7 -> 10 m), and in, the presence of mangrove trees are
relatively tall and large in diameter and available source of fresh water that
allows the formation of riverine mangrove forests in the habitat, ecological
and behavioral support needs proboscis. The river includes important ecological
components affecting every habitat selection by the proboscis in hutanbakau
including proboscis monkeys in the jungle rubber that require water or a small
lake as part of their habitat (Soendjoto et al., 2006). Mangrove forests
surrounding the river is higher productivity compared to other types of
mangrove forests (Mitsch and Gosselink, 1984). Higher trees will provide
security for the proboscis monkey. Besides sleep behavior proboscis that always
choose a location on the banks of the river for the purpose of securing a group
of predators and to communicate (Bismark, 1986; Yeager, 1990). For the
proboscis, the river serves as a source of drinking water and facilities for
swimming, while A. officinalis is in the river, as well as tree feed source
jugasebagai bed of leaves and fruits are high in protein and minerals.
Differences in size and population groups according to changes in the ecosystem
of the estuary upstream.
On the river,
there are 3 sub-populations Sangatta proboscis spread from the mouth to the
headwaters within 18-40 km. Sub-population is composed of groups of proboscis
monkeys 1-4 in the 1-2 km of riparian forests (Bismark and Iskandar, 1997).
Previously, Suzuki (1986) reported that the distribution of sub-populations of
proboscis monkeys in TN Kutai between 4-25 km (mean 10.6 km), the present
sub-group dispersed within an average of 30 km (Bismark and Iskandar, 2002).
This situation is indicative of the declining quality of the forest as a
habitat for proboscis.
The number of
individuals affected by the quality of the proboscis monkey habitat dantipe. In
the upstream, the proboscis monkey group consisting of 6-15 individuals and 10
km from the mouth, the proboscis monkey generally ranges between 10-25
individuals. Group of proboscis monkeys in a disturbed mangrove forest ranges
between 6-10 individuals, mangrovedengan forest vegetation cover, great group
of between 17-25 individuals. Observations in several survey sites showed no
difference in the number of proboscis monkeys were observed, the number of
observations on the first day of observation is different from the next day.
This difference represents a correction value calculating population data in
proboscis, which is 1.8. According Yasuma (1989), the value of this correction
is 2.46. Based on the value of the correlation, the proboscis monkey
populations in TN Kutai (Table 23) allegedly amounted to 400 people.
The high
frequency of encounter proboscis monkey in the mangrove forest habitat and NYPA
also reported by Bennett and Sebastian (1986); Salter et al. (1985), and Ma,
Ruf (2004). Given the limited proboscis monkey in the mangrove forest habitat
the greatest threat to the population of proboscis monkey is the destruction of
mangrove forests, particularly in conservation areas which conserve only 8% of
the mangrove area in Kalimantan. Report on the proboscis and in the current
population is relatively small.
In the 90's, in
TN Tanjung Puting the peat swamp forest habitat is estimated there are only
2000 people in Sarawak proboscis and proboscis estimated total population of
1,000 individuals and 300 individuals in the conservation area (Yeager and
Blondal, 1992). In 1986 McKinnon estimated population of proboscis only 250,000
individuals, 25,000 of which are outside the conservation area, while the
proboscis monkey is in the conservation area of less than 5,000 individuals
(Yeager and Blondal, 1992), whereas in the conservation area itself covers only
4.1% of all proboscis monkey habitat (McNeely et al., 1990) and in 1994 the
population of proboscis monkeys in Borneo estimated number of 114,000
individuals (Bismark, 2002).
4.2. Proboscis
Monkey Population Threat
Population of
proboscis monkey in the mangrove forest can reach 60 people per km ² (Bismark,
1986). Seen from the age composition in kelompokdan number of infants up to 4
individuals in the group showed that the reproduction rate is high enough
proboscis. In 9 years of observation in TN Kutai proboscis monkey population
the number of individuals per km ² decreased by 28.2% or an average of 3.1%
seta hun. Population decline is due to the increasing intensity of habitat
destruction on the banks of the river and the destruction of mangrove forests.
In 1985, the
population of proboscis monkeys in Tanjung Puting TN is 62.9 people per km ²,
in 1989 fell to 27.7 people per km ², and 41 people per km ² in 1991. Within 6
years there has been a population decline of 35% or about 6% a year. This is
due to the increasing pollution of river water due to gold mining, habitat
degradation, and increased traffic transport streams (Yeager, 1992). Population
decline may be caused by increased predator population due to forest clearing.
In rivarianpopulasi forest lizard (Varanus salvator) is quite high and the
lizard is one of the potential predators primates (Rodman, 1978; Yeager, 1990).
Population
differences among primate species, in addition affected by the level of
destruction of habitation (Yeager and Blondal, 1992, Wilson and Wilson, 1975;
Happel et al., 1987; Marsh and Wilson, 1981) is also determined by predator pressure
(Jolly, 1972 ; Tilson, 1977; Bennett, 1983), parasites (Rijksen, 1978,
Freeland, 1976), and geographic distribution (Happel et al., 1987; Chivers,
1974), social systems (Happel et al., 1987) as well as patterns and eating
behavior, such as leaf-eating primates higher population than frugivorous
primates (Chivers and Raemaker, 1980; Clutton-Brock and Harvey, 1977), and
differences in digestive physiology (Bennett, 1983).
Population
growth that looks good on degraded habitat on the island Shocked. Habitat
dominated caseolaris Sonneratia trees scattered between 20-55 m from the edge
of the river with a density of 150 trees per hectare, the proboscis monkey
still persist in the amount of nearly 300 individuals in the area of 267 ha.
Only 25% of the population looks less adapted to these conditions (Bismark,
1997). The population is quite high when compared with the population of
proboscis monkeys in TN Kutai with area 200,000 hectares, some 400 people
(Bismark and Iskandar, 1996). The population on the island Shocked looks can
adapt to sources of feed water plants Limnocharis flava, Agapanthus africanus,
Hymenachne amplicaulis and vittis trifolia. Aquatic plants are eaten primates
have a higher mineral content than plants feed on the dry plains primates (Oates,
1978). To maintain the population, proboscis monkeys need enough minerals
(Bennett and Sebastian, 1988), such as K, it takes sejum was 179.9 mg / kg body
weight / day (Bismark, 1995), whereas Vittis trifolia known to contain high
concentrations of K, ie 1.06%.
Hunting of
primates for the ecosystems something common to animal protein needs. The hunt
primates on the island of Siberut example is a part of culture and custom
masyarakat.Hal as the control population for the island tidakterdapat mammalian
predators. Hunting and farming is the main problem in the proboscis monkey
population decline, especially since 35 years ago where hunting and gun
ownership boatmulai speed developed in the community (Meijaard and Nijman,
2000), where the river bank is the proboscis monkey habitat area first opened.
The development of plant cultivation with fruits cause proboscis fields went to
get food. This raises the presumption proboscis as a pest and hunted
(Soendjoto, personal communication), but it is also hunted proboscis monkeys as
bait to catch a lizard (V. salvator) in order to get the lizard skin as a
source of additional income.
Forest fires are
very influential on the proboscis monkey habitat. As a result of forest fires
in Tanjung Puting (1997) has destroyed 75% of forests and wetlands in TN Kutai
leaves 5% proboscis monkey habitat due to forest fires (Meijaard and Nijman,
2000). Wildfires may increase mortality due to reduced food resources, loss of
habitat, and the incidence of the disease is endemic (Proboscis Monkey PHVA,
2004).
Based on the
above problems, the Proboscis Monkey PHVA (2004) identified 12 locations and
its proboscis monkey population estimated total number of individuals
individuals proboscis monkeys in Borneo is 25,000 individuals, within the konservsi
approximately 5,000 individuals. In this proboscis monkey conservation efforts
required extensive damage prevention and reduction of habitat by illegal
loggingyang can lead to forest fires and poaching, forest river border security
as well as the conservation of species habitat outside mangrove and peat swamp
areas, such as in the plantation area.
CHAPTER 5
DAILY AND
EXPLORE THE MOVEMENT
Daily activities
include activities proboscis monkey walk, feed, play, rest, and mutual lice or
investigate. Daily activities starting from the riverbank where the groups and
sub-groups of the night. Proboscis monkeys woke up at about 5:30 to begin the
activity by moving from branch where sleeping position and reverses at 6:15 lai
feeding activity, daily activities end at pukul18.30 afternoon.
In the mangrove
forest, riverside proboscis activity can last from dawn until 7:45 am the day,
such as eating daunAvicennia officinalis or Rhizophora apiculata around her
tree. When moving early, proboscis monkey can reach a radius of 400 m from the
river bank. In general, at 07.00, proboscis monkey is already on position 100 m
from the river bank. During daily activities berlang sung, the proboscis can be
divided into 2-3 sub groups. Movement patterns, shapes, and wide space odyssey
of primates in general is closely related to the distribution and the amount of
feed sources (Jolly, 1972; Whitten, 1982), the distribution of tree beds, and
weather (Chivers, 1974).
Parameter daily
movement activities include long proboscis proboscis dilaIui track in one day
(DR, daily range), the maximum radius is measured from the proboscis taken
tempattidur location (MR, maximum radius) and the distance between the transfer
of the original location of sleep the next night (NPS, posisition night shift)
(Chivers, 1974; Gumarya, 1986, Megantara, 1989) within a period of proboscis
movement. Farthest distance from the riverbank (TS) were also measured as
motion parameters.
5.1. Daily
Movement
Daily movement
led by adult female proboscis. The movement starts from the tree of the bed
where the direction of movement is determined. This situation was also reported
by Rajanathan and Bennett (1990) for more females need a good source of food
for their children (Bennett, 1983).
Rubber forest
vegetation with little variation by water source (in this sense include
vegetated area or land area within 100 m from the edge of the water) is an
important part of the proboscis monkey habitat. Based on the encounter with the
proboscis in 18 locations in the region Tabalong District, South Kalimantan,
Soendjoto et al. (2005) revealed that statistically, there is a positive
correlation between the real and rubber springs in the forest with the presence
of proboscis. The source of water is not only a starting point for activities
proboscis during the day or the end point to stop activity during the day, but
also for social activities, including breaks.
Transfer of the
proboscis occurs twice in one day. The first transfer occurred from a
particular water source that is used as the location of sleep to another water
source, the proboscis monkey do most of the activities during the day. The
second transfer occurs from water sources for the event this afternoon next to
a water source that is used as a location to sleep at night. This explanation
reinforces the idea Bismark (1986) that the pattern of movement-oriented
proboscis on where to sleep, where to eat, and rest.
Switching
between sources of water twice a day dilakukanoleh 70% of the proboscis, and
30% of them make the shift once a day. Switching between sources of water
carried by the proboscis in the early, middle, and late afternoon. Switching
more often done at 6:00 a.m. to 8:00 a.m. and 3:00 p.m. to 5:00 p.m. hour and
rarely performed at 11:00 to 14:00.
Daily movement proboscis
monkey in the mangrove forest average is 497 m as reported by Bennett and
Sebastian (1988) is 300-590 m (average 483 m). According to Bennett and
Sebastian (1988) there is a group that goes as far proboscis 1400 at 12:30 am
and is expected to journey a day up to 2,000 m. Proboscis daily movement
distance from the edge of the river reached 750 m (Salter et al., 1985). In
general, the only daily movement of 600 m (Bennett and Sebastian, 1985). Per
the daily movement patterns of proboscis is very dependent on the selection of
tree location on the banks of the river bed, forming a semi-circular or
elliptical pattern. Switching locations to sleep on the opposite side of the
river through the movement of primates berenang.Jarak positively correlated with
body weight and the number of individuals in the subgroup of men foraging
(Clutton-Brock and Harvey, 1977).
In general, the
location of primates bed position is located in the center of the developm
baraan, as Hylobates klossii occupying sleeping tree in the middle range area
two times more than at the edge of space odyssey (Whitten, 1980). Location
Presbytis aygula sleep position is on the edge of space odyssey (Ruhiyat,
1986), so that the daily movement patterns are affected by displacement
tempattidur location.
Presbytis aygula
running (DR) between 300-600 m (average 500 m) per day, MR 250-900 m with NPS
0-400 (average 221 m) (Ruhiyat, 1986). Presbytis femoralis runs, DR 929 m on
average per day, MR 237 m, and 130 m NPS (Megantara, 1989). Presbytis Thomasi
runs, DR 150-1300 m (average 640 m), MR 140-590 m, and NPS 110-590 m (Kunkun,
1986).
Proboscis
activity pattern correlation as has been discussed (MR = 101.86 + 0.669 NPS and
DR = 41.30 + 1.825 MR). In a space odyssey proboscis monkey in the mangrove forest
there are no constraints in terms of food resources, but the vegetation on the
banks of the river as a location for a bed and food resources strongly
influence the movement patterns of proboscis. The choice of location for
primate bed serves to avoid predators and parasites (Freeland, 1976). Distance
from the edge of the river odyssey primates are also influenced by the
composition of the feed, in this case the comparison between the leaves and
fruit. Primates "frugivorous" will be further away from the river
bank (Rodman, 1978).
DR difference
between the types of Colobinae influenced by habitat quality and diversity of
food sources, such as P. melalophos (DR = 754 m) with a diversity of feed is
higher than P. Thomasi (DR = 640 m) (Kunkun, 1986). The movement was also
influenced by the energy needs according to weight. The more weight the more
energy needed for movement, especially the vertical movement. Thus the
orangutan with a weight of 55 kg runs sepanjang453 m per day shorter than the
M. fascicularis weighing 5 kg which goes as far as 1869 m per day (Wheatley,
1982). Proboscis weight greater than other types Ceropithecidae allows for
shorter daily movements than other types. The establishment and spread of
sub-groups in search of food and a uniform distribution of trees in mangrove
forests merupakansalah one factor that led to the short trips proboscis.
Statistically,
the daily movement distance and real berkorelasinegatif proboscis with
rainfall. Distance was decreased in the months with high rainfall and increases
in the months of low rainfall (dry season).
As wildlife in
general, especially for the proboscis monkey move limited feed and water in the
surrounding environment. This limitation is related to the diversity of the
type of feed, the acquisition, and far proximity to water sources. The increase
in daily temperature on a sunny day allows proboscis walk far to find somewhere
to shelter, feed and rest, and makes it possible for the proboscis to return
quickly to the edge of the river in the afternoon. When the weather is sunny,
bekantandi mangrove forests can walk reaches the maximum distance from the
riverbank (TS) as far as 400 m at 8:15 pm or within 2 hours, and then eat and
rest up at 14.30. The difference in air temperature at a location on the edge
of the river is 100 m into the forest ranged from 0.5 to 1.5 ° C, while the
temperature difference with the forest floor to the canopy tree height 15 m at
location 100 m from the river bank between 0.5 -1.5 ° C.
Proboscis travel
away into the woods when the temperature increases is an effort to maintain
balance setting temperature (thermoregulation) body in the woods because of the
lower temperatures. By the time the air temperature increases the release of
body heat through evaporation also increased (Montheith and Unsworth, 1990).
When the air temperature increases, the animals will decrease feeding activity
and increased consumption of drinking water, as well as increased air humidity
(Church et al., 1971).
5.2. Use of
Forest Strata
The physical
condition of their habitat built by vegetation structure, tree lighting,
temperature and humidity, which affect the movement patterns of primates,
particularly the pattern of vertical movement is the movement of primates by
strata (height) canopy trees. In some species of primates simpatrik different
uses of the strata showed differences in ecological niches of each species
according to the anatomical organ movement (MacKinnon and MacKinnon, 1980).
Proboscis
movement includes the movement of arboreal and terrestrial. The movement of the
tree consists of arboreal quadrupedal movement, climbing, jumping, and hanging
(the movement of the hand). Proboscis movement patterns under the canopy strata
suggests that the activity of the vertical movement of proboscis monkeys in the
mangrove forest is more common in strata 0-5 m (33.19%), at 5-10 m strata
(24.28%), and the strata 10-15 m (27.53%) dengantipe quadrupedalyang movement
became dominant (running with 4 limbs) (Fig. 19), while daily activities such
as eating, rest, play, and social activity on the rubber forest habitat.
Generally there
proboscis daily activities at the level of less than 15 m height with a canopy
of lush by foliage. These conditions not only create a comfortable microclimate
for the proboscis to sit rest or play, but also provides a safe place to avoid
agonistic behavior, fights between individuals, hide or escape from predators.
In the rubber forest and the lake, the trees are commonly used for the event
include Macaranga pruinosa, Vitex pubescens, Dillenia exelsa, and Elaeocarpus
stipularis (Soendjoto et al., 2005).
Frequency of use
of the forest floor (0-5 m) more than the other strata pergerakan.Hal activity
is related to the weight factor proboscis (adult females and adult males 12.5
kg 25 kg) requiring balance while walking, in addition to requiring branching
tree with a rather large as infrastructure movement. Fleagle (1980) states that
the use of vegetation by strata correlated with primate foraging strategy. In
the mangrove forest with a fairly homogenous habitat conditions, the
availability of food resources (leaves) in each stratum, strata proboscis
monkey will choose to eat and places isitirahat, particularly in strata 10-15
m. The selection is related to the role of the strata above it is a protector.
In this case the difference in air temperature above the canopy at 20 m below
the 15 m up to 1.5 ° C (Bismark, 1994). The difference in temperature above the
canopy (> 20 m) with the forest floor at 8:40 pm by 1 ° C and increased to 2.5
° C at 12:00.
This condition
also causes proboscis down to the forest floor to break and run, either in the
woods or on the river bank.
5.3. Space
Wandering
Space odyssey is
the area used by individuals or groups with normal activity for feeding,
mating, and care for children, and some are interpreted as the total area used
(Mah and Aldrich-Blake, 1980). Rijksen (1978) defines as the total area used by
an individual or a group home. In this study referred to as space is
devel-baraan total area used the proboscis monkeys during the study. Jolly
(1972) defines home range (space odyssey) as areas commonly inhabited by
animals throughout his adult life.
Yeager (1989)
reported that the space odyssey proboscis ranged from 125 to 137.5 ha (average
of 130.3 ha) with 95.9% overlap areas, while areas that are part of a group
(adjusted home range) was 19, 3 ha. Vast space odyssey proboscis in TN Kutai
was 19.4 ha, not unlike the adjusted home raised rangeyang Yeager (1989). The
narrowness of the space odyssey proboscis than due to habitat destruction also
limited daily mileage of the river bank. Proboscis attachment and vegetation on
the river banks of the river as the location of the bed, feed source, and the
source of drinking water also resulted in limited space odyssey. The narrow
range area is maintained through daily movement and the formation of
sub-groups, voice, and agonistic behaviors that menyebabkanadanya overlapping
space odyssey by 20.7 to 62.8%.
While the
overlap area on the banks of the river as the location of a lack of sleep
ranged from 23.8 to 100% is maintained. Lack upayamempertahankan bed location
visible from the distance between groups of up to 50 m between the one with the
other groups. This condition is a form of integration between groups as anti-predator
behavior (Yeager, 1991), because they bed site selection by primates to be the
main criteria in terms of safety from predators (Roosmalen, 1980; Whitten,
1982).
Space odyssey
Colobinae types overlap. Ruangpengem baraan P. aygula area of 38 ha having
overlap of 10% (Ruhiyat, 1983), P. melalophosdengan space odyssey between 14 to
31.3 ha overlapping reached 15-79% of its area (Bennett, 1988), P. femoral,
with a space of 23.8 ha odyssey has overlap between 15.8 to 36.7% (Megantara,
1989). The overlap can be caused by a space odyssey areal extent to be
maintained and thus require more energy. In addition jumlahdan equitable
distribution of food resources lead no intense competition (Bennett, 1988).
Daily activities
proboscis mangrove forest on the banks of the river during the day is to find
food, rest, and play. The location and frequency of visits associated with the
basal area of trees Avicennia officinalis. Availability of food, leaves, and
fruit of A. officina lis influenced basal area and tree canopy that provides a
broad leaf. Besides the presence of proboscis monkeys will be more frequent at
A. officinalis fruit so the presence of the men on the banks of the river is
very important for the population of proboscis monkeys. In P. habitat melalophos,
Leguminoceae basal area was positively correlated with population density
(Marsh and Wilson, 1981). Association of individuals within the group and
between groups generally occur at night in the river. This behavior plays a
role in sleep pengamananlokasi from other animals and predators (Yeager, 1991).
Association of the proboscis can be seen from the overlapping use of the area
as a location on the banks of the river bed.
Proboscis
monkeys sleep in trees A. officinalis and Rizophora apiculata whose position
lies between 0-50 m from the edge of the river. Trees were selected as the bed,
in addition to close to the edge of the river, also has a wide canopy with a
horizontal branching. This condition is necessary for the body position while
resting or sleeping in the balance. Trees that are closer to the edge of the
river that is used for overnight generally not too high, ie 10-15 m. While the
tree is used which is 20 m from the edge of the river is R. apiculata with a
height of 20-30 m and the location of the tree canopy which is separated from
the surrounding trees. Trees selected beds can be occupied by 3-15 people, so
that during sleep the proboscis seemed to form sub-groups scattered between
50-150 m.
Yeager (1989)
reported that the river flow long occupied by peat bogs proboscis monkey groups
ranged from 1575-1750 m with an overlap between 92 to 97.7%. Tian Peneli
Bennett and Sebastian (1988) showed that 19 groups of proboscis of the river
along the 13.5 km each spanning the river between 1650-7500 m. The narrowness
of the use of the river by a group of aquatic bekantandi TN due to the limited
length of the river and the width of the mangrove habitat, in addition to no
cases of proboscis hunting. Factors enabling the transfer of location hunting
proboscis sleep relatively more distant. Although in the study area there are
no cases of poaching, but habitat destruction more impact on narrowing the
space odyssey and the cruise on the river bank.
In most cases
(90%) locations will move proboscis sleep every day. The location can be used
for two, three, and empatmalam respectively. The area of the river along the
50 m can be occupied by 1-3 sub clogs pok consisting of 2-15 individuals. The
selection of the location and movement of tree location of the bed, resting or
sleeping position at the end of the branch and on the top of the tree canopy
that is not related to the surrounding trees is a way to reduce the likelihood
of proboscis monkeys predator attacks at night. Site selection and association
proboscis sleep by the river is the social behavior of proboscis monkeys in the
anti-predator strategy (Yeager, 1991).
Sleeping in a
tree with a broad canopy with scattered resting position on the edge and the
top of the canopy is an anti-predator strategy is to make it easier to detect
the presence of predators and easy to jump. Predators that might attack her
proboscis monkey in a tree is a kind of snakes and lizards. Lizard (V.
salvador) and crocodile (Tomistoma sclegeli) are potential predators proboscis
(Yeager, 1991), but in this case the proboscis monkeys do not develop
anti-predator strategy of the crocodile (Galdikas, 1984).
CHAPTER 6
EATING BEHAVIOR
Primates have a
particular feed composition, according to the habitat and season (Curtin and
Chivers, 1979; Iwamoto, 1982; Harrison, 1984) so that this state can show
different patterns of eating behavior. Feeding behavior of primates closely
related to the quality of food resources such as high levels of cellulose can
not be digested and the presence of secondary compounds such as tannins in the
feed so that the two components is a major factor in feeding ecology (feeding
ecology) primate (Harison, 1984).
Richard (1977)
examined eating technique, place and altitude, activity patterns, feed
composition, the part that is eaten, and the amount of feed variation and
movement patterns as parameters of feeding behavior. According to the amount
and type of food, primates are classified in two types, ie more dominant
frugivorousyang eat fruits and eat the leaves folivorousyang more dominant.
Spare Hylobatidae including tipefrugivorous, while his tribe Colobinae
(Presbytis spp., And Nasalis larvatus) belong to the type of folivorous.
Primates of the
tribe Colobinae children have similar digestive systems of ruminants. The
digestive system is known as polygastric, of which there are organ forestomach,
where the fermentation of food by bekteri. From the result of the fermentation
process are obtained (Bennett, 1983):
1. The bacteria
that produce vitamins. Thus, animals are not overly dependent on the vitamins
contained food, kecualivitamin A and D.
2. Bacteria that
can use non-protein nitrogen to grow. Urea caused by protein catabolism can be
converted by bacteria into protein. Bacteria can pass from the stomach to the
intestines halussehingga animals received additional high-quality protein.
3. The use of
urea in the synthesis of protein by the micro flora causes a decrease in the
amount of urea thus saving the expense of water in the form of urine.
4. Bacteria that
can neutralize the effect of tannins derived from edible plant species.
5. The large
number of bacteria and the rapid proliferation rate of fermentation also causes
fast that tannins in the process of making a new food is not active. In
addition there is also degradation of carbohydrates into volatile fatty acids.
Primates
monogastricseperti Hylobates spp. generally consume feed easily digestible,
contain a lot of sugar and contains no alkoloid. Another difference between
primates monogastricdengan Colobinae type is the unqualified requirement for
certain nutrients where the primates monogastricmemakan feed with low nutrients
in large quantities due to the digestive process much faster, while consuming
Colobinaeakan highly nutritious plants (Bennett, 1983).
According to
Milton (1981) voting behavior in primates feed related to body size and anatomy
of the digestive tract. Relations with the anatomy of the digestive tract
proboscis volume was greater among Colobinae other types.
6.1. Time
Activity
Proboscis active
starting at 05:30 until 18:30 or 13 hours a day. During this time the activity
took place to walk, play, feed, or take a nap. Allocation harianbekantan
activity or activities of the day varies according to the time (Figure 22).
There are three peaks in one day activity is about 8.30, 12.30, and at 15.30.
Activity began to increase at 7.00 that runs from the edge of the river into
the forest until it reaches a maximum radius (MR).
Peak feeding
activity is highest in the afternoon, while the peak of movement activity look
different but follow the fluctuations feeding activity. This shows that the
proboscis monkey feeding trees by moving moving. Around 12:00 feeding activity
increased to 12.30 pm and then decreased, and the next activity followed by
rest and sleep until 14:00.
Seen feeding
activity ongoing in one day. This illustrates that in addition to the
time-intensive meal, some of the members of the group remain a meal at an
interval of rest though not in the high frequencies. Similar circumstances also
reported Ruhiyat (1983) on P. aygula in West Java, P. femolaris, with
continuous feeding activity but peak activity occurs in the morning and evening
(Megantara, 1989). Gurmaya (1986) reported that the feeding activity of P.
Thomasi has three peaks of activity, ie at 08.00, 12.00, and 17.00 with the
highest peak in the afternoon. Salter et al. (1985) observed that the peak
activity of eating and walking proboscis monkeys in Sarawak occurred at 09.00
am and at 13.00.
Frequency of
eating members of the group and the activities that follow the movement of the
fluctuation eat, proboscis monkeys showed that feeding activity is not fixed on
one tree, and always followed by running events at the branch or from tree to
tree. In this case the location of eating proboscis movement occurs between
10-15 minutes. In addition, the number and distribution of fodder trees are
equally possible to support the proboscis monkey feeding activity at any time.
Play and
berkutuan (each for fleas) occurs when a break in the morning and evening. Play
activities performed by adults and adolescents dansetengah between parent and
baby, while males mature more rest and sleep. Adult females and young people
need better nutrition feed for harbor maintenance and Growth babies, whereas
males with weight loss female weight twice more rest.
Proboscis
activity in some places show a different pattern, such as proboscis activity in
mangroves TN Bako and Wildlife Samunsam in Sarawak (Salter et al., 1985). This
activity pattern is presented in Table 29. The results of the observations made
in TN Kutai is in the observation interval Salter et al. (1985). The difference
in activity may be due to differences in zoning and a dominant mangrove plant
species from each habitat, so nothing to do with the quantity and nutritional
quality of food resources.
Proboscis
monkeys are arboreal activity lasted from forest floor to canopy trees with a
height of 30 m. While the height of the trees in the habitat proboscis can
reach 43 m (R. apiculata and B. gymnorrhiza). Fluctuations in the main daily
activity is eating, walking, and resting in the forest strata are presented in
Figure 23. Of the six levels of vegetation in the habitat strata proboscis, the
dominant strata for all three main events proboscis is 10-15 m strata,
especially for feeding activity (42%) and the rest (37%), whereas the
activities were more banyakpada strata 0-5 m (34%) and very little in strata
25-30 m (8%).
The high
frequency of utilization of 10-15 m strata is caused by dense mangrove trees
between 10-35 cm in diameter (188 trees / ha) and a height of 10-15 m is the
bottom and middle canopy. The middle of the canopy with a flat and large
branching can support quadrupedal movement. In addition, the center of the
canopy provides enough comfort for shaded by a canopy top so there is a
difference in temperature 1.5 ° C lower and branching according to weight
proboscis.
Differences in
habitat use simpatrik strata indicate different ecological niches of each type
of primate. It also depends on the type of movement, the productivity of leaves
or fruit, the temperature and humidity of each stratum (MacKinnon and
MacKinnon, 1980). The use of strata by the primate is also related to the
efficiency of the movement of arboreal primates in search of food, and even if
food resources more efficiently dispersed the journey through the forest floor,
such as the behavior of M. nemestrina (Rodman, 1978). This strategy also looks
at current activity goes a long proboscis into the woods with a relatively
short time. Proboscis monkey in the mangrove forest traveling a distance of 400
m from the river bank dalamwaktu 1.25 hours or 320 m per hour. Rapid movement
without stopping is rare, but the speed will perger proboscis can reach 450 m
per hour (Salter et al., 1985).
6.2. Eating
Techniques
Proboscis
monkeys belong folivorous primates (leaf eaters) (Rodman, 1978; Yeager, 1989;
Bennett and Sebastian, 1989). Group folivorousmendapat essential proteins from
the leaves, while the class of frugivorous add protein needs from fruits and
seeds (Hladik, 1978). Proboscis monkeys eat leaves, flowers and fruit at the
ends of the branches, but the position of the proboscis monkey on a branch in
the canopy, grabbing sticks around or sitting on a branch. Position proboscis
while foraging technique similar to P. obscura and P. melalophos reported
Fleagle (1980). The style and technique of the proboscis monkey as it looks.
The leaves are
consumed proboscis is the young leaves in the order of 1 to 3 of the top
branches. The feed can be taken directly by mouth or by picking. Leaves eaten
one or two pieces in a way to bite up to three times. Every bite is chewed
between 10-30 times, fruit A. officinalis eaten one at a time and chew 15-30
times, so that in 5 minutes proboscis converting state consumption 15.6 7.5
leaves or fruit of A. officinalis. Chewing is 10-30 times as much as one
strategy to help digestion proboscis physically and stimulates salivation to
maintain the pH of the stomach so that the fermentation of feed by stomach
bacteria can run optimum (Bismark, 1994). In general, Na + present in the rumen
of ruminant derived from the saliva (Durand and Kawashima, 1980), whose role is
to maintain a stable pH of the stomach (Bennett, 1983).
6.3. Type and
Diversity Feed
Proboscis monkey
in the mangrove forest habitat with R. communities apiculata, consisting of R.
apiculata, A. officinalis, Bruguiera gymnorrhiza, B. parviflora, and some such
limited number B. sexangula and Avicennia marina, the kind that is not class
mangroves, such as Ardisia humilis, Ficus binnendykii, Allophyllus cobbe, and
Aglaia cuculata. The diversity of mangrove plant species in space odyssey
proboscis in TN Kutai was 2.08 (Shannon-Wiener Index). The low diversity of
plant species in the habitat caused low diversity proboscis to feed large
quantities.
Mangrove plant
species are eaten proboscis is R. apiculata, A. officinalis, B. gymnorrhiza, B.
parviflora, and A. cobbe. Edible parts include leaves, flowers, fruit and bark
with a diversity index of 1.748.
From the
observation feces, in addition to leaves, flowers, fruit, and bark particles
were also found crabs and termites. Proboscis monkeys are also reported to eat
the fungus Stereum lobatum (Bismark, 1980), and interest Nipa fruticans
(Bennett and Sebastian, 1988).
Research Yeager
(1988) says there are 47 species of plants yangdimakan proboscis in peat swamp
forest but every month just consumed 10-23 species (average of 14.9 species)
with a diversity of 0.86 to 2.21. Salter et al. (1985) stated that the type of
feed proboscis at two study sites (TN Bako and Wildlife Samunsam) include
mangrove habitat, swamp palm, riverside forests, dipterocarp forests and Heath
who have any kind of food no less than 90 species of plants.
From some of the
research results are positive correlation between weight primates with leaves
in feed composition (Clutton-Brock and Harvey, 1977) and primates that consume
leaves more likely to achieve a high biomass (Hladik, 1977; Bennett, 1983)
(Figure 26 ). Proboscis to feed composition has a 51.94% leaf biomass 499.5 kg
/ km ² (Yeager, 1989), and that takes a leaf number of 41% of the total biomass
feed having 45.8 kg / km ² (Bennett and Sebastian, 1988), while proboscis feed
composition comprising 81.14% of the biomass has 792.06 kg / km ².
6.4. Feed Composition
and Selection Ratio
In regard to
feeding behavior and feeding proboscis, four things that support the study of
behavior (Soendjoto et al., 2005). First, proboscis monkeys consuming diets
(leaves, flowers, fruits) from various plant species. The diversity of food is
an attempt proboscis or other animals in general to maintain balance and
nutritional needs. Nutrients that are not derived from plant species or of
certain types of feed derived from feed type or species tumbuhanlainnya.
Second, proboscis
monkeys are found more often eat shoots or young leaves than old leaves. This
is in accordance with the opinion of Bennett and Sebastian (1988) that the
proboscis prioritizing young leaves although older leaves abundant. Primates
will eat older leaves when young leaves tidaktersedia again. The cause of this
is the selection of young leaves more water content. It is known that the water
content in the shoots reach 88% and 67% in young leaves. Bismark (1987)
reported that the proboscis monkey in the mangrove forest eat the leaves with
water content of 68%. Another factor is the level of ease to digest high on
young leaves as indicated by low crude fiber contained by buds or young leaves
(Table 32). Food that contains easy to digest, high in general have a low fiber
content.
Third, after
picking feed, proboscis monkeys do not always take all parts of the plant such
as leaves plucked rubber sometimes only partially eaten. It is not known for
certain reasons proboscis behave that way. In the mangrove forests, proboscis
monkeys also eat some of the leaves and discard the rest. This method is an
attempt proboscis for energy efficiency in the digestion of feed and to obtain
better nutrition (Bismark, 1986).
Fourth,
proboscis monkey and likes eating food source that actually has a high tannin
levels. It showed a great tolerance to high levels of tannin feed. Leinmuller
et al. (1991) reported several publications about the toxic effects of tannins,
namely a reduction in appetite and weight loss in sheep and goats and the
presence of toxins in the kidneys and liver of animals that have a simple
digestive system (monogastric).
Feed proboscis
consists of 81.14% leaves, fruits 8.38%, 7.68% interest, 1.05% bark, and 1.75%
insects. From the analysis of known composition feces feed the leaves 72.90%,
17.79% fruit, bark 7.05%, 1.13% insects and crabs. Proboscis feed composition
observed in the field was not significantly different from the results of the
analysis of feces. Plant fragments in the feces of ruminant animals is not different
from the proportion of plants eaten (Todd, 1973).
Judging from the
chemical content, bark (R. apiculata) are eaten proboscis does not show a very
real difference to the leaves and fruit, with the exception of the amount of
crude fiber (63.78%) and Ca (0.958%) bark (higher). The concentration of Ca in
the bark up to 5 times higher than the leaves. Calcium (Ca) in ruminant feed is
useful for digestion of cellulose, for the formation of the bacterial cell wall
and for the process of nitrogen fixation by bacteria (Durand and Kawashima,
1980). Highest ratio of feed selection is A. officinalis (Table 34). The high
ratio of the selection of A. officinalis because the levels of protein and
essential minerals are high and its position near the edge of the river where
proboscis monkeys feeding activity often done at a distance of 0-100 m from the
edge of the river (73.53%), especially in the morning and afternoon. Salter et
al. (1985) also reported that feeding activity proboscis more frequent around
the edge of the river. The dominant type of proboscis feed is R. apiculata and
A. officinalis respectively 71.9% and 22.7%. In Sarawak, only get a portion
Rhizophora and Avicennia 0.8% 7.6% of the time eating proboscis (Salter et al.,
1985).
Comparison of
protein with fiber and tannins in feed proboscis is 0.35. This ratio is higher
than the feed Presbytis (0.15 to 0.25) (Bennett, 1983). This shows that the
proboscis tolerant of tannins and low fiber and high-protein feed needed. There
was no correlation with the concentration ratio of feed selection tannins and
crude fiber, crude fiber and tannins as can be fermented and turned off by the
digestive tract microflora (Hladik, 1977; Bauchop, 1978; Bennett, 1983, and
Lindroth, 1989). Volume gastrointestinal proboscis wider than other Colobinae
digestive tract volume so that the system will be more efficient digestion.
Leaves are the
major feed component proboscis (81.14%). Although the fruit is consumed only
8.38% but has the selection ratio 65.57. Proboscis fondness for fruit (A.
officinalis) was associated with lower levels of fiber and tannins (11.02%)
compared with leaves (average 23.903%). Besides fruit A. officinalis containing
Cu (18.8 ppm) is higher than other food sources (Table 41) where Cu role in
activating protein synthesis (Durand and Kawashima, 1980). Cu deficiency can
cause anemia in ruminants (Church et al., 1971). To provide for the essential
amino acids proboscis insects or termites (Coptotermes) and crab.
6.5. Feed the
need
By age class,
individual adult female proboscis monkey, half-grown, and young with an average
weight loss was 8.84 kg of feed consumed by the composition comprises 81.14% of
the leaves, fruits 8.38%, 7.68% interest, as well as insects, crabs, and bark
some 2.8% of the amount of feed or 900 g wet weight of 270.25 g in beratkering.
The time it takes to consume is 3.01 hours per day (Table 40). When compared
with the production of young leaves, only 1% of the mangrove forest
productivity consumed proboscis. Hladik (1978) reported that leaf-eating
primates consume only the leaves in the total forest productivity ranged from
0.5 to 4%.
Based on the
observations of the three types of plant feed proboscis monkey in the jungle
rubber (Table 38), the amount of feed per day varies between individuals
proboscis 919.96 to 1537.59 g wet weight (Soendjoto, 2005). Bismark (1987)
reported that edible plants proboscis monkey in the mangrove forest berberkisar
1500-1750 g leaf.
Caloric content
of feed consumed proboscis, the average was 3.9475 kcal per gram dry weight.
Thus, feed intake proboscis weighing 270.252 g dried (30.57 g dry weight of
feed / kg body weight) of 1066.8 kcal calories or 120.68 kcal / kg body weight.
According to
research by Iwamoto (1982), Macaca fuscata weighing 8 kg of feed needed an
average of 254 g dry weight (31.75 g / kg body weight) with the calories of
1050 kcal (131.25 kcal / kg body weight). Meanwhile, according to research by
Hasan (1983), P. melalophos were bred with an average weight 4.6 kg of feed
consumed some gberat 28.3 per kg dry weight by 110.7 kcal calories per kg of
body weight. Compared with the above results, the need for food and calories
per kg of body weight on average proboscis monkey is no different from M.
fuscata and P. melalophos.
Mealtimes affect
the adequacy of calories, in this case P. melalophos males and females did not
differ in time to eat because no sexual dimorphism (Bennett, 1983) is certainly
different from N. larvatus where males weighing twice the weight of females.
For calorie, proboscis the efficiency, in which the male proboscis monkey is
running slower, down to the forest floor, and the activity did not play.
6.6. Mineral
Needs
Proboscis feed
derived from plants is 98.25%, consisting of leaves, fruits, and flowers.
Results ana lysis concentration of minerals and mineral content of total P, K,
Na, Ca, Mg, CI, Fe, Mn, Cu, and Zn in the feed consumed proboscis that on
average every day.
Type of feed
consumed in small quantities exhibit certain advantages in the minerals needed
proboscis, as Alophyllus cobbe (0.87% share of the feed) containing P and Zn
were higher than the dominant type of leaf fodder. Although the main sources
feed the leaves, but the flowers and fruit consumed for additional mineral
needs, such as the rate R. fruit and A. apiculata officinalis contains higher
Cu than leaves of A. offici nationalists. P content in leaves and fruits A.
officinalis higher than Rhizophora and Bruguiera, while the bark of R.
apiculata containing Ca higher than other feed sources.
Of the total cumulative
(Table 41), including mineral deposits that a major element proboscis feed
consumption in one day is P 431.47 mg; Na 2275.65 mg; K 1588.56 mg; 1314.9 mg
Ca, and Mg 1053.98 mg, whereas other elements (minor) required in small
amounts, namely Fe, Mn, Cu, and Zn mas ing each 89.86; 7.965; 2.75, and 1.79 mg
per day.
To meet the
needs of minerals, types Colobinae eat plants and clay marsh (Oates, 1978),
such as the proboscis monkey eating leaves of A. cobbe. Berda sarkan proboscis
monkey feces mineral content in the mangroves the absorption or utilization of
mineral feed main elements P, K, Na, Ca, Mg, and Cl over 90%, while other
elements are (minor), Cl, Fe, Mn, Cu, and Zn varies from 60-80%. It appears
that the mineral needs proboscis is supported by an efficient digestive system
proboscis. The efficiency of the digestive system allowing for an digestive
duct volume larger proboscis (8371 cm ³) than other types of Colobinae.
CHAPTER 7
BIOMASS AND
POWER SUPPORT HABITAT
7.1. Biomass
Parameters
The movement of
arboreal primates depend on the physical keseimbanganstruktur stratification
extensive forest canopy cover, stand height, tree density, and species
composition in the habitat. The physical structure of forest stands is needed
to support the daily movement behavior, foraging, social activity, and
reproductive behavior. Besides the physical structure of the balance stands
also define micro-climatic conditions that affect the physiology of animals,
feed consumption, digestibility, and energy efficiency (Church et al., 1974).
Total feed intake and energy depend on the weight or biomass species (Moen,
1973; Wheatley, 1984).
The amount of
biomass arboreal animal population affected by the carrying capacity of the
habitat, especially the stand density and diversity of tree canopy
stratification feed and structures that affect the movement and energy
efficiency in the metabolism of animals. Population density and biomass is
strongly influenced by the physical structure and biodiversity of forest stands
as habitat quality parameters.
Effect of
habitat structure and balance microclimate terhadapefisiensi seen from the
comparison of energy consumption energy consumption proboscis monkey in
captivity at 119.46 kcal per kg body weight (BW), which is almost equal to the
energy needs in the mangroves sebesar120, 68 kcal per kg body weight to support
all activities hariannyasecara free (Bismark, 1994).
Energy
sufficiency population arboreal animals with feed source leaves, flowers,
fruits, and seeds such as primates is determined by the productivity of the
forest, weight or biomass population of animals that inhabit it. Therefore, the
determination of weight arboreal animals can be used to predict the level of
carrying capacity, or to assess the quality of the forest as a habitat. Weight
measurements performed directly on the nature of the styles denganmenimbang
bending tree branches less than 10 cm in diameter with a maximum height of 5 m
are used proboscis to sit or stop just before running or jumping. Dahan tied to
the gravity dikait proboscis with a rope and spring scales attached to the root
of the tree, perpendicular under gravity. Elasticity and limb load can be seen
on the scale when the rope is pulled timbanganpegas and flexural limb
ditempatibekantan same time.
To find the
geometric parameters are closely related to body weight, sitting height
measurements or body length and head proboscis. Prediction of body weight
indirectly by high parameter sit better and easily observed (Bismark, 1994).
Measurement of sitting height (td) in the field is done by measuring the
distance of the head to the forest floor or branches where proboscis
duduk.Sebelumnya distances two points to be measured observed with binoculars
to determine the sign on the tree branches, twigs or leaves that are touching
or parallel to the head and the proboscis monkey determining the point in his
seat.
7.2. Proboscis
monkeys Weight Measurement Model
Proboscis
monkeys are primates dimorphism, where there are differences in body shape,
nose shape, and size of body morphology that affect weight. Comparison of body
shapes and sizes are correlated with body weight according to sex and age class
of the proboscis monkey sitting height (body length up to the head). Parts of
the body geometry parameter can be a dominant weight proboscis monkey is
sitting height and body surface area.
Seat height is
more easily observed and measured in the field. Another parameter closely
related to body weight is body surface area (body, head, and limbs) where
extensive permukaantubuh (L) animals weighing between 0.02 to 1400 kg weight is
proportional to the rank ¾ even close ⒠ (Montheith and Unsworth , 1991).
Based on the
results of measurements of body surface area proboscis by sex and age class
with geometry parameters are easily observed in the field, the seat height (td)
made a correlation analysis follows an exponential regression model similarity
(Bismark, 1994). The regression analysis of the relationship td (cm) and L (m²)
of male and female produce:
L (ˁ) = .0514
e0, 0395td. (R = 0.90)
L (˂) = .1048
e0, 0662td. (R = 0.87)
In accordance
with the high ratio of male and female proboscis monkey sitting, then the
equation L estimates also differ between males and females, then L is used to
estimate the weight td proboscis through indirect measurements. From Table 44
it is known that the body surface area (in m² L) correlated with proboscis
weight (BW kg) following equation: L = 0.134 BB0, 67. Prediction of body weight
based on the parameters of male and female sitting height (td) and body surface
area (L) systematically, as follows:
1.
Measurement of sitting height (td in cm) in the field
2.
Calculation of body surface area (L in m²)
(1)
......... L ˁ = 0.514 e0, 039 td
(2) ......... L
˂ = .1048 e0, 0662 td
3.
Prediction of body weight (BW)
(3) ............
L = 0.1324 BB0, 67
Based on the
analysis of the data in Table 44, the results of measurements of td and BB with
a variety of primary data sources regardless of their age class jeniskelamin
and then obtained a general equation of correlation td and weight as follows:
(4) .........
BB0 td = 33.03, 25 (r = 0.91)
The results of
these estimates are determined with an accuracy pengamatantd in the field. For
observations have been observations td proboscis position with upright body
position relative to the branch of the tree is less than 10 cm in diameter with
a height of 5 m in order to identify and quantify td on the sign in which a
sitting or tagging stick around that touches the top of the head proboscis. To
measure td observer must climb the tree to sit on posisisatwa primates,
proboscis monkey has moved shortly.
7.3. Biomass
Estimation
Based on the
number and age class composition of the proboscis in one sq km of mangrove
forest can be estimated biomass of the proboscis.
Yeager (1988)
stated that the biomass of a group of proboscis monkeys in Tanjung Puting
ranged from 54.1 to 148.4 kg, while the biomass of the population was 499.5 kg
per km ², in which the proboscis with one male adult, with adult males weighing
20.3 kg, 2 kg infant, adolescent 5 kg, half the adult females 9 kg, 12 kg adult
male half, and adult females 9.9 kg. In Wildlife Samunsam, Sarawak, proboscis
monkey population biomass of 46 kg per km ² (Bennett and Sebastian, 1988).
Biomass is a
kind of high Colobinae Presbytis senex in Polonnarua, ie 1450 kg per km ². This
type of leaf eating large portions, namely a 400 kg per individual per year
(Hladik, 1978). Colobinae kind in Southeast Asia showed no significant
differences in the amount and composition of social groups (Bennett, 1983). But
the differences among primate species biomass is determined by the feed source
(Hladik, 1978). The population of leaf-eating primates (Colobinae) higher than
the fruit-eating primates, this is possible due to the high productivity of
leaves and available every season.
Biomass primates
also affected by the conditions and differences in habitat, such as P.
melalophos and P. obscura lowland each with 300 kg of biomass per km ² and 314
kg per km ² (Marsh and Wilson, 1981) in contrast to that in the highlands.
Productivity and environmental differences in peat swamp forest habitat along
the river with riverinemangrove forest biomass also showed perbe distinction
proboscis, which is 499.5 kg per km ² to 792.06 kg per km ², the amount of
biomass is greater than the biomass proboscis in other habitats.
7.4. Habitat and
Adaptation Capability
The carrying
capacity of the habitat indicated proboscis monkey population that can live in
habitats within a given area. Carrying capacity is influenced by the type,
quality, productivity, habitat, food resources and external factors that affect
the quality and productivity of habitats, such as pencemaran.Habitat proboscis
monkey in the mangrove forest with tree density (≥ 35 cm diameter) as many as
59 trees / ha, 118 pole / ha, and 508 saplings / ha showed high forest
productivity. It is predicted from litter production under the stands. Litter
production average 3.32 g dry weight / m² / day equivalent to 13.18 kcal / m² /
day. Production of mangrove riparian forest litter in Florida reported by
Mitcsh and Gosselink (1989) is 14 kcal / m² / day. With the results of the
litter a net primary production of the mangrove forest is 57 kcal / m² / day.
Clough et al. (1983) reported that Rhizophora that grow well in Australia
produced leaflets a 5 ton / ha / year. One indicator of mangrove forests that
are in the condition of high productivity is the result of litter mencapai1 0.3
to 2, 0 g / m² / day (Champman, 1983).
Proboscis
individual calorie needs depend on your weight and activity goes. Of the event,
59.92% done with quadrupedal walking, climbing 11.34%, 23.89% jump, and 4.85%
move by hanging. Based on the formula Moen (1973) and Wheatley (1982) the
caloric needs of the average proboscis monkeys weighing 8.84 kg for arboreal
movement activity was 133.76 kcal, covering the needs of 93.55 kcal jumping,
quadrupedal movement, climbing and swinging 4.92 kcal, and the vertical
movement (gradient 50%), 35.29 kcal. Basal metabolic 358.89 kcal, 14.38 kcal
meals, breaks 92.89 kcal and 47.91 kcal play. Arboreal movement activity is not
on a flat surface so that the caloric requirements for arboreal movement is
doubled (Wheatley, 1982). Thus, the total caloric needs proboscis with an
average body weight 8.84 kg is 781.60 kcal. To meet the daily calorie proboscis
weighing 8.84 kg consuming 900 g of feed a day.
Caloric content
of feed consumed proboscis average is 1066.8 kcal or 120.68 kcal / kg body
weight proboscis. Mangrove forest habitat carrying capacity is 84 individuals
proboscis / km ² with 778.68 kg biomass and caloric needs 93971.1 kcal per day,
while the productivity of habitat is 570,000 kcal / km ², thus the energy
consumption of feed required bekantan the optimum population is 16, 5% of the
primary productivity of the habitat.
In the mangrove
forest habitat with good quality and high productivity, proboscis monkey can
live in a relatively dense population. This is evident from the use of core
areadaerah cruising relatively small (18-20 ha) with an overlap of 20-62% space
odyssey. Yeager (1989) reported that the space odyssey (home range) proboscis
in peat swamp forest ranged from 125 to 137.5 ha area overlapping with 95.9%,
while the "adjusted home range" of intensive use was 19.3 ha per
group . Spacious living proboscis monkey in the mangrove odyssey was 19.4 ha,
not unlike the adjusted home raised rangeyang Yeager (1989). To cope with the
competition in the placement of trees and tree food source proboscis sleep in
moving bed location average of 220 m each day and the distance between groups
of 50-400 m.
Use and transfer
of trees on the banks of the river bed is an adaptation to disease and
predators proboscis. In habitats that have been damaged tree selection
strategies and behavior of bed to move every day is a way to maintain the
population.
Efficient use of
time and travel in foraging activity, clogs pok proboscis forming sub-groups
average 8.5 rataterdiri each individual dispersed within an average of 96 m.
Forty-three percent of the sub-groups consisting of one adult male individual
was 9.12 and 22.8% consisted of 2 males. Formation of sub-groups than to
resolve the competition between individuals also play a role in the efficient
use of feed resources, monitoring space odyssey, and the efficiency of controlling
members of sub-groups that are fewer in number by the adult males.
Proboscis monkey
population density in rivers affected by changes in forest vegetation types of
the estuary wetlands to mixed dipterocarp forest in the hinterland upstream.
Forests in the interior relatively nutrient-poor, while the proboscis monkey as
leaf-eating primates (Colobinae subfamilies) requires high mineral.
Proboscis
serious habitat degradation have occurred on the island of Borneo Shocked South
in 1996. An area of 267 ha is occupied proboscis some 228 individuals.
Habitat dominated by Sonneratia caseolarisdi riverside 20-55 m thick with a
density of 150 trees / ha. Tree density is still support for the tree needs
sleep and food for some 200 individuals proboscis with the distribution of
sub-groups of between 25-75 m. In terms of feed, with an indication of the
level of emaciation proboscis, qualitatively only 25% of the proboscis that can
not be adapted to habitat conditions, especially solitary individual and the individual's
old age classes.
Adaptation
proboscis proboscis looks of how plants utilize water bermineral high, because
the forest floor is dominated by the riverside undergrowth, Eichornia
crassipes, Lymnocharis flava, Pistia stratiotesyang easily washed and swept
away in the river. Plants Agapanthus africanus is dominant, while in the center
of the island is dominated by Acrostichum aureum.Tumbuhan Shocked generally
covered under my breath root S. caseolaris.Sebanyak 75% of the population can
adapt to the proboscis look feed from aquatic plants, namely Lymnocharis flava,
Agapanthus africanus, Hymnenachne amplexicanlis and Vittis trifolia. Aquatic
plants are eaten primates have a higher mineral content than plants feed on the
dry plains primates (Oates, 1978).
To maintain the
population, proboscis monkeys need enough minerals (Bennett and Sebastian,
1988) such as K, it takes a number of 197.9 mg / kg / day (Bismark, 1995) while
Vittis trifoliadiketahui containing K 1.06%. The high mineral plants on the
island is indicated by the results of the chemical analysis of breath Soneratia
caseolaris roots.
But the roots of
breath S. caseolaris, minerals detected were Zn, Cu, and Al, the concentration
of the womb mineraltanah 2-8 times, while the Al content of 6-17 times that of
the concentration of Al ground, Cd and Pb was not detected. Cd was not detected
in the roots of S. breath caseolarisdapat due to high concentrations of Zn,
where a high concentration of Zn can reduce the absorption of Cd.
Proboscis
monkeys living in Kuala Samboja riparian forest, East Kalimantan near the
settlement can consume Mangifera caesia, Garcinia mangostana, Durio zibethinus,
Sandoricum koetjape, and Hevea brasiliensis, however, still take Sonneratia
caseolarissebagai mineral resources (Alikodra et al., 1995). Adaptation of the
proboscis monkey habitat and food resources visible from the population density
and the number of group average 14.9 individuals / groups (Alikodra et al.,
1995) and in the headwaters dominated Dipterocarpaceae average of 12 individual
/ group, while in the woods mangrove 17.4 and 21 individuals / groups.
This indicates
differences in habitat carrying capacity, especially in the provision of feed
and mineral resources. In the forest of rubber, can be adapted proboscis well
characterized by the number of members of the group were more than 19
individuals. High levels of protein and important minerals in feed availability
and the availability of water bekantan a major supporter of the existence and
adaptation proboscis outside the peat swamp forest or mangrove forest
(Soendjoto et al., 2006).
CHAPTER 8
CONSERVATION
8.1. Habitat
degradation and population decline
The South East
Asian Zoo Association (SEAZA) and the Association of Zoos whole Indonesai
(PKBSI) has identified that the proboscis occupies high priority in
conservation in situ or eksitu. For it has been held in Bogor international
workshopkonservasi organized by the Conservation Breeding Specialist Group of
the IUCN-the World Conservation Union (CBSG) and workshops in Indonesia
Proboscis Monkey Population and Habitat Viability Assessment (PHVA) December
2004 (Proboscis Monkey PHVA, 2004) .
The high level
of conservation priority due to concerns about the proboscis monkey populations
decline in the wild quickly. The population of proboscis monkeys in Borneo
approximately 25,000 individuals, and the results of the identification of the
12 locations spread proboscis, the population is estimated at 9200 individuals
(PHVA Prosboscis monkey, 2004) and Supriatna (2004) predicts population 15,000
individuals living with habitat lajudeforestasi 2.49%. In 1994 the total
population of proboscis monkeys in Indonesia some 114 000 individuals with one
example in TN Kutai totaling 400 individuals (Bismark and Iskandar, 2002).
In conservation
areas scattered groups of proboscis between 4-25 km (1986), an average of 30
miles in 1994, and the distance distribution outside the conservation area will
grow in line with the fragmentation of the forest along the river habitat
proboscis, peat swamp forests and dissolution corridor which connects lakes
forested habitat berpotensisebagai proboscis, such as the distribution of
sub-populations bekantandi Mahakam Delta which is an average of 50 km (Ma'ruf,
2005).
Fragmentation of
habitat by the river will cut off migration routes in case sewaktuwaktu
proboscis monkey population capacity of the habitat. Similarly, the lack of
food in a particular season and kebutuhanmineral high as feed components
directly proboscis which can result in a decrease in population. Within a year
the proboscis using forest area 9 km ². Habitat fragmentation may increase the
threat of poaching, parasites, predators, and high pressure affecting the
proboscis monkey population decline.
Effect of
habitat fragmentation on the population, especially in the forest proboscis
riverinemangrove, because of potential mangrove vegetation as habitat for
proboscis monkey is only 7%. Additionally peat swamp forest habitat has been
degraded through the use of production forests, agricultural land development,
plantation and settlement. The threat of population decline due to the
reduction proboscis monkey proboscis monkey habitat was 3.1% per year (Bismark
and Iskandar, 1997) while habitat degradation 3.49% per annum (Supriatna, 2004).
When viewed from the population in 1994 with a population of 114,000
individuals and 15,000 individuals in tahun2004, population declines in the
last 10 years an average of 10% per year. This shows that the proboscis monkeys
are sensitive to habitat fragmentation.
Given the daily
activities proboscis using 500 m wide riparian forest and daily movement
proboscis between 300-800 m in rubber, 800-2000 m in the mangrove forest, then
the proboscis monkey habitat conservation efforts need to be done perlindunganatau
river riparian forest established as a protected area is an area at least 500
m. Protection 500 m wide river border is in addition to providing habitat with
minimal carrying capacity to the proboscis monkey, has an impact on the
reduction of the flow rate of surface soil erosion carrying particles that can
degrade the quality of the river. Accelerating depletion results mineralization
of litter that can cause eutropikasisungai, including the preservation of
species diversity of aquatic fauna. In production forests bordering the
proboscis monkey habitat harvesting techniques need to be applied to the
Reduced Impact Logging (RIL) to maintain water quality. It is very conducive to
the preservation of habitat for proboscis monkeys, because the proboscis in dire
need of good quality water that can be mempengaruhikualitas feed, tree beds,
drinking water, and as a means for swimming and bathing activities.
Observations
Yeager (1992) in TN Tanjung Puting in 1985 showed proboscis monkey population
density of 62.9 people per square km, and 41 individuals per square kilometer
in 1991. Dalamwaktu six years there has been a population decline of 35% or
approximately 6% per year. This is caused by the pollution of river water due
to gold mining in the headwaters, the river habitat degradation, and increased
boat traffic. Given the proboscis is very sensitive to habitat destruction
(Bennett and Gombek, 1991), the proboscis monkey populations can be used as an
indicator for swamp forest destruction. Populasibekantan habitat conditions
that severely damaged an average of nine people per square km (Yeager and
Blondan, 1992).
Water pollution
by heavy metals indicated accumulation Cd, Pb, Cr, Ni, and Mo in the root
tissues R. apiculatadalam proboscis monkey in the mangrove forest habitat
(Bismark, 1995). Merangasnya Sonneratia caeolarisakibat heavy metals Shocked
Island South Kalimantan, causing a potential drop feed proboscis. Riverside
forests and wetlands associated with coastal tidal river or sea is polluted,
then the dissolved pollutants that can affect the quality of the food source,
and can affect the diversity of species and populations of endangered species.
Habitat
destruction caused predators proboscis perform movements with ease. Varanus
lizard populations salvatorsebagai one predator primates (Rodman, 1998; Yeager,
1992) pretty much contained in the swamp and mangrove areas. Besides lizards,
reptile as a predator allowing proboscis in mangroves is a cobra (Ophiophagus
hannah). The problem is not just a problem proboscis monkey habitat reduction
swamp forest area, but also the issue of quality of river water into drinking
water, bathing, and swimming to the proboscis. Ongoing settlement construction
and upstream industries, can degrade the quality of rivers, such as the
pollution of the parasite can spread through water. Evidence of this has been
known from the discovery of faecal worm egg Ascrisdan Trichiurisdalam
proboscis. Trichiuris commonly found in the feces of primates such as Macaca
fascicularis (Matsubayashi, 1981), the orangutan and chimpanzee (Rijksen,
1987).
8.2.
Conservation Eksitu
Maintenance of
proboscis monkeys in the zoo and the public have long done inside and outside
the country, and the first successful breeding of proboscis monkeys reported in
1993. Of the various public statements, proboscis monkeys are captured from the
wild is very difficult to maintain because it has high levels of stress and
sulitmakan, consequently it is not uncommon to die within a short time.
Breeding experiments proboscis in East Kalimantan has been done in the area of
plant species PT Pupuk Kaltim Bontang (1993) and Taman Safari Indonesia
(TSI). Proboscis monkeys are ditangkar in PT Pupuk Kaltim Bontang fed with
instant noodles, fruit trees Simpur (Dillenia sp.), Banana, papaya, and
drinking water.
The average dry
weight of feed per day proboscis is 157.93 g or 27.85 g / kg body weight by
calorie feed 119.46 kcal / kg body weight. At the Singapore Zoo Zoological
Garden (SZG) proboscis monkeys fed with apples (25 g), banana (25 g), green
beans (3 tissue), boiled eggs (½), and rice with meat (25 g) in the form of a
ball. Furthermore fed with pellets (Zupreem primate dry) with fish oil and
neotroplek (3-4 pellets) and leaves (3 belt or 4 kg) to feed the needs of the
individual 5 proboscis. Reported since the beginning of 1998 are maintained at
SZG proboscis from Yogyakarta Zoo healthy lifestyle with diet above and can
bear children.
In Taman Safari
Indonesia (TSI), Bogor proboscis monkeys fed vegetable 37.42%, 3.98% protein,
49.71% leaves, and fruit with a ratio of 8.89% Ca / P ratio of 1.31. Proboscis
monkeys weighing 6 kg 1.8 kg meal or 30.18% of the weight by calorie content of
925.5 kcal (Trihastuti et al., 2004), the caloric needs of the female proboscis
monkey feed weighing 8.8 kg was 745, 41 kcal and males weighing 5 kg requires
647.8 kcal calories (Bismark, 1994). Bekantan feed components in TSI, Bogor.
Types of leaves
given to proboscis in TSI is cinnamon leaf, fig, angsana, Jingjing, ketapang,
jackfruit, and fig jelateh. These species have a high Ca levels between 6-30%,
where the fig leaf Ca jelateh 30.5 ppm, levels of P from 0.1 to 2.3%, and
protein content from 11.3 to 22.8%. Feed composition, nutrient levels, and
proper feeding techniques will support the acceleration of breeding or
conservation programs eksitubekantan, as indicated by the growing population of
proboscis through child birth in captivity.
Eksitubekantan
conservation through the development of captive breeding in zoos or other
conservation organizations can be used as a means of conservation education and
leisure that brings cultural values regarding the preservation of proboscis
monkeys in nature, especially in terms of prevention of poaching or habitat
rehabilitation efforts by the river, lakes, and forests with plants that can a
source of feed proboscis.
8.3.
Conservation Program
Based on the
results of the 2004 PHVA proboscis, habitat destruction has been identified
problem and its impact on the sustainability of the proboscis monkey as shown. Utilization
and conversion of forest land proboscis monkey habitat in the peat swamp
forests, freshwater swamps or mangroves into plantations, fisheries or mining
ponds in the upstream river water quality berdampakpada proboscis monkey
habitat is already running long. Among these are changes in water quality
proboscis monkey habitat in Tanjung Puting TN due to gold mining in the
headwaters. The degradation of the river reinforced by high river transport
activity (speed boat) which can increase abrasion by the river, reducing the
diversity of plant species under the edge of the river as a potential
sumberpakan proboscis.
River pollution
by heavy metals indicated by increased concentrations of heavy metals in the
roots of mangrove plants are a source of food proboscis, such as Zn and Cu
content in roots Soneratia caseolarisdengan concentration of 2-8 times of the
existing content in the soil and 6-17 times for mineral al. The content of
20-120 ppm Pb and Mo ppm 1,04-1-21 found on mangrove roots in TN Kutai (Bismark,
1994), whereas in the unspoiled mangrove forests have undetectable levels of Mo
(Bismark, 2007).
The expansion of
farms that reach more than 50% within 10 years (Sarjono, 1997) and the
proboscis monkey habitat tersisanya area of 10% in the Mahakam estuary
(Ma'ruf et al., 2005) and the breaking of proboscis monkey habitat and
distribution averaged over 30 km is the fact that it can be used as the basis
for why the preservation of the proboscis is a top priority, including the
impact of forest fires caused by various public interventions into the peat and
forest by the river illegally.
To overcome the
problem of habitat and population decline proboscis programs need to be made
following activities:
1. Inventory
distribution, habitat, and the proboscis monkey populations.
2.
Rehabilitation and restoration of habitat potential for the development of
proboscis monkey populations.
3. The
development level of public participation in the conservation of river border
and
wildlife.
4. Settings
using the river as a means of transportation, waste prevention of entry into
river, and building development in riparian river habitat proboscis.
5. Eksitu
conservation development.
6. Development
of natural tourism object proboscis in an effort to increase the economic value
local communities and wildlife benefits.
7. Enhancing the
role of institutional and cultivation of forest management efforts related
the
utilization of non-timber forest products and environmental services.
8.3.1. Inventory
Distribution of Population
Increased land
use along the river habitat and increasing river transport bekanta has been
shown to decrease the population and habitat fragmentation proboscis.
Therefore, the population distribution of the data is necessary to determine
the conservation status and priorities rescue program. It is more important for
the preservation of the proboscis outside the conservation area. Inventariasi
is also associated with a program of rehabilitation, restoration, and use of
the area and population as the tourist attractions in the nature.
Currently,
research is generally focused on the determination of the distribution of
danpopulasi, while behavioral research that supports the preservation of
habitat is still limited because of the type of habitat and nature proboscis
semiterestrial complicate the process of habituation. Therefore, the results
presented in this book and behavioral research proboscis monkey habitat
utilization in the last 10 years. The results of recent research conducted
Soendjoto (2005) is a research proboscis monkey in the jungle rubber. The
review addressed the aspects of adaptation proboscis to rubber plantations. The
results also indicate that the inventory proboscis monkey is found in a
limestone hill forest, South Kalimantan.
8.3.2. Habitat
Rehabilitation and Restoration
Riverside forest
is the area of the first and more easily used by the local community in the
development of agriculture pemukimanatau, including the construction site for
the management of non-timber forest products, timber industry, and the industry
so that the habitat of proboscis angkutansungai highly susceptible to
fragmentation and
formation of
critical lands.
Appropriate
population distribution inventory, the program needs to be continued for
rehabilitation or restoration habitatbekantan potential for coaching
populations. Rehabilitation or restoration programs on habitat quality has
declined diarahkanpada enrichment plant species feed containing minerals and
high in protein. Development of habitat for population increase is directed to
sub-population groups in the region could reach the minimum population (250
people). If the area is part of the agricultural frontier, rehabilitation can
be done by planting fruit that can support the availability of food sources
such as proboscis monkeys reported Alikodra et al. (1995), or with rubber
(Soendjoto et al., 2005). The leaves and fruit of the plant species that can be
consumed by a proboscis like SZG Singapore.
8.3.3. Breeding
Eksitubekantan
conservation efforts have shown results with a growing number of individuals in
the form penangkarandi proboscis monkey zoo and TSI. This success is also
supported by efforts to develop the type and quality of feed proboscis that
meet nutritional and caloric needs. Success is indicated by the success of the
proboscis monkey born in captivity tersebut.Penangkaran is one of the
conservation efforts that can increase knowledge and public awareness of
wildlife conservation.
The proboscis
monkey is in the area of captive zoo or TSI is used as a source or a model in
conservation education. It can enhance the value of conservation and wildlife
habitat conservation cadres as a step in performing insitumelalui conservation
awareness to the protection of forest, river border, and prevention of
poaching. In addition, it can also be applied to change the perception of
people who have considered agricultural pests bekantansebagai become a tourist
attraction.
8.3.4. Riverside
Forest Utilization Settings
Riverside
forests (habitat for proboscis monkeys), the river and the water quality is
crucial in preserving the population of proboscis monkeys. Forest river border
at least 500 m wide with a diversity of tree species and plant height for trees
sleeping and feeding proboscis preserved as habitat critical. In areas with low
species diversity as a plantation crop and fruit dikelolamasyarakat, daily
movement proboscis increased to 800-1000 m.
Therefore, the
use for other purposes such as gardens and settlements should be at least 500 m
from the river bank. This meant that the level of disruption to the
agricultural proboscis will be low, because the proboscis is very tied to the
water source. Adaptation proboscis to crops growing population seen in the
rubber forests. However, water resources and riparian forest springs and small
streams remains an important part of feeding behavior and daily behavior
bekantan.Mengingat that the increased traffic on the river habitat to reduce
the population of proboscis monkeys proboscis would require rules or signs in
rivers inhabited by proboscis. It is necessary for the driver to speed
boatmengurangi speed in order to avoid high noise can cause stress on the
proboscis, especially in small streams.
8.3.5. Agro
Development
Restoration or
rehabilitation program riverside proboscis monkey habitat in line with the
development of the river with the object type proboscis. Rehabilitation of
river border can be combined with fruit trees agroforestrysehingga pattern can
be part agrowisata.Pakan proboscis development program that composition is more
than 80% of the leaves can be said that the threat to the fruit proboscis is
relatively low, so the model agroforestrymerupakan combination with increasing
aspect of conservation of proboscis monkeys incomes, rehabilitasilahan, and
improving the quality of the river. Expected development wisataalam in habitat
outside conservation proboscis was soon realized and improved in order to
reduce the fragmentation of habitats and populations outside protected areas.
Proboscis role
in maintaining biodiversity habitat vegetation. In this case the proboscis
monkeys also eat seeds of plants are dominant. This method will provide an
opportunity for non-dominant species to thrive, thereby proboscis monkey
populations large enough role in the improvement of biodiversity of forest
vegetation (Yeager and Blondal, 1992).
Preservation
proboscis outside the conservation area large role to guard lest the decline is
at a critical threshold. Most of the proboscis monkey habitat is outside the
conservation area, therefore proboscis monkey habitat in production forests
really need to be fostered. Although the hunt for rare proboscis monkeys, but
habitat destruction due to development proboscis residential areas and
agricultural and fishery (fishery) more negative impact on population decline.
Proboscis monkey populations for conservation, habitat protection needs to be
made by the river where proboscis monkeys are found at least as far as 500 m,
corresponding to the distance from the edge of the river proboscis in daily
activities. The river banks are inhabited proboscis in production forests
should be included as an indicator of conservation areas of sustainable
production forest management can be managed as forest tour.
In Brunei, the
preservation of proboscis monkey populations developed concurrently with the
development of eco-tourism, so the damage to wildlife habitat through increased
recreational activities (Yeager and Blondal, 1992). In TN Kutai, most of the
foreign tourists who visit trying to find a group of proboscis monkeys in
addition to see orangutans in the Gulf of Kaba. Ecotourism development in
conservation areas, national parks, and outside conservation areas, in addition
to providing support for habitat conservation and populasijuga provide a
positive economic impact for the community, especially outside the conservation
area. In protected areas like national parks itself and wildlife habitat and
populations in which the proboscis conserved, necessary supervision and
guidance of intensive habitat and populations given the rampant illegal
logging. This activity can be done starting from the forests in the river
border.
Endangered
species management activities outside and inside the conservation area is still
the main tasks the Ministry of Forestry (MoF), while the presence of wildlife
habitat and not always exist in the supervision and responsibility of ministry,
such as buffer zones of national parks are managed by the Local Government
(Ministry of Affairs). In the buffer zone there is still a potential habitat
for rare wildlife, including the proboscis monkey. With the high rate of
fragmentation, habitat proboscis had been unconscious in the rural areas where
the habitat is very meaningful to pegembangan farms and gardens to support the economic
needs of the people.
Proboscis monkey
habitat also exists in production forest habitat in which security is the
responsibility of license holders Timber Forest Product Utilization (IUPHHK).
Although existing environmental management and regulatory guidance to establish
conservation areas and areas of forest genetic resources in the production, but
the presence of the proboscis monkey habitat specific cause determination and
habitat protection in the above categories have not been fully implemented.
Coordination of
watershed management programs, protected areas of peat, mangrove forests,
villages and plantations integrated and synergistic in preserving the habitat
and populations of proboscis is needed, especially in the outer region is
necessary konservasi.Untuk institutional establishment as Agency
PengarahKonservasi Bappeda coordinated by the members of relevant agencies such
as the Department of Forestry, Agriculture, Local Government, Irrigation (PU),
and others whose activities have an impact on habitat improvement and
preservation of the proboscis.
REFERENCES
Aldrich-Blake,
F. P. G. 1980. Longtailed macaques. p. 147-165. In: Malayan Forest Primates
(Chivers D.J. ed.). Plenum Press, New York.
Alikodra, H. S.,
A. H. Mustari, N. Santoso, and Yasuma. 1995. Social interaction of proboscis
monkeys (Nasalis larvatus Wurmb) group at Samboja Koala, East Kalimantan.
Pusrehut, Anual Report, 10 pp.
Anwar, J., S.J.
Damanik, N. Hisham, and A.J. Whitten. 1984. Sumatra ecosystem ecology. Gadjah
Mada University Press, Yogyakarta.
Baker, E. W. and
G. W. Wharton. , 1952. In introduction to arcarology. The Mac Millan Company,
New York.
Bauchop, T.
1978. Digestion of leaves in vertebrate arboreal folivores. p. 139-204.In: The
Ecology of Arboreal Folivores (GG Montgomery ed.).
Smithsonian
Institute, Washington D.C.Bennett, E. L. 1983. The Banded Langur: Ecology of a
Colobinae in West Malaysian Rain Forest. Ph.D. Dissertation, Cambridge
University, Cambridge.
Bennett, E. L.
and A. C. Sebastian. 1988. Social organization and ecology of proboscis monkeys
(Nasalis larvatus) in mixed coastal forest in Sarawak. Int. J. of Primatol. 9
(3): 233-255.
Bhosale, J. L.
and L. S. Shinde. 1983. Significance of cryptovivipary in Aegiceras
corniculatum (L) Blan-co., P. 123-129. In: Tasks for Vegetation Science (HJ
Teas eds.) Vol. 8. Dr. W. Junk Publishers, The Hague.
Bismark, M.
1980. And behavior of the proboscis monkey populations (Nasalis larvatus) in
Tanjung Puting Wildlife Reserve, Central Kalimantan. Forest Research Report
No.. 357.
Bismark, M.
1986. Behavior proboscis (Nasalis larvatus) in exploiting the mangrove forest
in Kutai National Park, East Kalimantan. Master of Science Thesis, Graduate
School of IPB, Bogor.
Bismark, M.
1986. The diversity of birds in mangroves Kutai National Park. Bul. Pen. Hut.
482: 11-22.
Bismark, M.
1993. Distribution and primate populations as indicators of environmental
quality habitat in the area of natural production forest residual stand.
Symposium and Seminar National Primate. October 1993. Cisarua.
Bismark, M.
1994. Parasites lizard (Varanus salvator) Aponomma lucasidi Krakatau Islands
Nature Reserve. Bul. Pen. Hut. 558: 14-25.
Bismark, M., I.
Soerianegara, D. Sastradipradja, F. G. Suratmo, H. S. Alikodra and H. Pawitan.
1994. The potency of mangrove forest habitat tothe proboscis monkey's food
source at Kutai National Park. EastKalimantan. International Primatological
Society Congres, Bali.
Bismark, M.
1995. Feed consumption proboscis monkey in captivity. Bul. Pen. Hut. 589:
27-38.
Bismark, M.
1997. Habitat management and population of proboscis monkeys (Nasalis larvatus)
Shocked Island Nature Reserve. South Kalimantan. Discussion of Research, Center
for Research and Development and Nature Conservation.
Bismark, M., H.
Gunawan, H. Tikupadang, and S. Iskandar. 1997. The composition and type of feed
Macaca ochreata Swamp National Park Aopa Watumohai, Southeast Sulawesi. Bul.
Pen. Ujung Forestry 3 (1): 1-17.
Bismark, M. and
S. Iskandar. 2002. The total study population and social structures proboscis
(Nasalis larvatus) in the Kutai National Park, East Kalimantan. Bul. Pen. Hut.
631: p.17-29.
Bismark, M., R.
Sawitri, and S. Iskandar. , 2004. Effect sistempenebangan TPTI environmentally
friendly and forest production on fish species diversity. Jurn. Pen. Hut. and
Kons. Nature I (2) :147-155.
Bismark, M. ,
2004. Carrying capacity of the habitat and adaptations Nasalis larvatus.Jurn
proboscis. Pen. Hut. and Kons. Nature I (3) :309-320.
Bismark, M. ,
2005. Estimates of orangutan populations and forest protection model in complex
Lesan Muara Berau, East Kalimantan. Bul. Germplasm. 11 (2): 74-80.
Bismark, M. ,
2005. Biomass measurement model primate populations. Jurn. Pen. Hut. and Kons.
Alam II (5) :491-496.
Chapman, V. J.
1983. Mangroves in New Zealand. p. 81-85. In: Tasks for Vegetation Science (HJ
Teas ed.) Vol. 8. Dr. W. Junk Publishers, The Hague.
Chivers, D.J.
1974. The siamang in Malaya: a field study of a primate in tropical rain
forest. Contrib. Primacy. (4): 1-335.
Chivers, D. J.
and J. J. Raemakers. 1980. Longterm changes in behavior, p. 209-258. In:
Malayan Forest Primates (Chivers D.J., ed.). Plenum Press, New York.
Chivers, D. J.
and J. J. Raemakers. 1984. Natural and synthetic diets of Malayan gibbons, p.
39-56. In: Primate Ecology and Conservation (DJ Chivers, ed.) Vol. 2. Cambridge
University Press, London.
Christian, K.
C., R. Trancy, and W. P. Father. 1983. Seasonal shifts in body temperature and
use microhabitats by Galapagos Land iguanas (Conolophus pallius). Ecology 64
(3): 463-468.
Church, D. C.
1974. Effect of stress on nutritional physiology, p. 663-683. In: Digestive
Physiology and Nutrition of Ruminants (Church, DC,
G. E. Smith, J.
P. Fontenot and A. T. Ralston eds.). Albany Printing Co., Oregon. Clough, B.
F., K. G. Boto, and P. M. Attiwill. 1983. Mangroves and sewage: a revaluation,
p. 151-161. In: Tasks for Vegetation Science (HJ Teas ed.) Vol. 8. Dr. W. Junk
Publishers, The Hague.
Clutton-Brock,
T. H. 1977. Some aspects of intraspecific variation in feeding and ranging
behavior in Primates, p. 539-556. In: Primate Ecology (Clutton-Brock T.H. ed.).
Academic Press, London.
Clutton-Brock,
T. H. and P. H. Harvey. 1977. Species differences in feeding and ranging
behavior in Primates, p. 557-584. In: Primate Ecology (T. H. Clutton-Brock
ed.). Academic Press, London.
Collette, B. B.
1983. Mangrove fishes of New Guinea, p. 91-102. In: Taskes For Vegetation
Science (HJ Teas ed.) Vol. 8 Dr. W. Junk Publishers, The Hague.
Curtin, S. H.
1976. Niche separation in sympatric Malaysian leaf monkeys (Presbytis obscura
and Presbytis melalophos). Yearbook of Physical Anthropology 20: 421-439.
Curtin, S. H.
and D. J. Chivers. , 1979. Leaf eating primate of Peninsular Malaysia, the
siamang and the dusky leaf monkey, p. 441-464. In: The Ecology of Arboreal
Folivores (DJ Chivers ed.). Smithsonian Institution Press, Washington, D.C.
Curtin, S. H.
1980. Dusky and banded leaf monkeys, p. 107-145. In: Malayan Forest Primates
(D. J. Chivers ed.). Plenum Press, London.
Curran, L. M.,
S. N. Trigg, A. K. McDonald, D. Astini, Y. M. Hardiono, P. Siregar, T. Caniago,
E. Kasischke. , 2004. Lowland Forest Loss in Protected areas of Indonesian
Borneo. Science 303: 1000-1003.
Darnaedi, D. and
A. Budiman. 1982. Analysis of mangrove forest vegetation Morowali, Central Sulawesi,
p. 162-170. In: Proceedings of the Seminar II Mangrove Ecosystem, Baturaden.
MAB-LIPI, Jakarta.
Darsidi, A.
1984. Management of mangrove forests in Indonesia, p. 19-28, In: Proceedings of
the Seminar II Mangrove Ecosystem, Baturaden. MAB-LIPI, Jakarta.
Department of
Forestry. , 2005. Forestry Strategic Data. Jakarta.
Department of
Forestry. , 2007. Forestry Statistics of Indonesia 2006.Jakarta.
Diamond, J. M. ,
1975. The island dilemma: Lessons of modern biogeographic studies for the
design of nature reserves. Biol. ConsERV. 7: 127-145.
Dingwall, P. R.
1984. Overcoming problems in the management of New Zealand mangrove forest, p.
97-106. In: Physiology and Managemant of Mangroves (Teas HJ ed.). Dr. W. Junk
Publishers, The Hague.
Durand, M. and
R. Kawashima. 1980. Infuence of minerals in rumen microbial digestion, p.
375-408. In: Digestive Physiology and Metabolism in Ruminant (Y. Ruckebusch and
P. Thivend eds.) MTP Press Limited, Lancaster, England.
Field, C. D., B.
G. Hinwood and I. Sterenson. 1984. Structural features of the salt gland of
Aegiceras, p. 37-42. In: Tasks for Vegetation Science (HJ Teas ed.) Vol. 9. Dr.
W. Junk Publishers, The Hague.
Fleagle, J. G.
1980. Locomotion and posture p. 191-207. In: Malayan Forest Primates (Chivers
DJ, ed.) Plenum Press, New York.
Freeland, W. J.
1976. Pathogens and the evolution of primate sociality. Biotropica 8 (I):
12-24.
Ganzhom, J. U.
1984. The influence of plant chemistry on food selection by Lemur calta and
Lemur fulvus, p. 21-29. In: Primate Ecology (JG Else and PC Lee ed.) Vol. 2.
Cambridge Univ. Press. London.
Ganzhom, J. U.,
J. P. Abraham, M. Razanahoera. 1985. Some aspects of the natural history and
food selection of Avahi laniger. Primates, 26 (4): 542-463.
Galdikas, B. M.
F. 1985. Crocodile predation on proboscis monkey in Borneo. Primates 26 (4):
495-496.
Gittins, S. P.
and J. J. Raemakers. 1980. Gibbon, lar and agile gibbons, p. 63-106. In:
Malayan Forest Primates (D.J. Chiversed.). Plenum Press, New York.