… It might possibly occur in China (extreme southeastern Tibet). WESTERN HOOLOCK GIBBON Hoolock hoolock La specie è inserita nella Appendice I della Convention on International Trade of Endangered Species . Preservation of the tropical forest is imperative to gibbon survival - if it disappears, so do the gibbons. Range Description. This number had subsequently declined to about 200 individuals in the early nineties (Islam & Feeroz 1992) and the declining trend continues in many areas of Bangladesh, with some areas having lost all of their hoolock gibbons (Feeroz 2001, Das et al. Ecology of the hoolock gibbon (Hylobates hoolock), a lesser ape in the tropical forests of north-eastern India. We compiled a list of all the plant species whose leaves, shoots, fruits, flowers are reported to be eaten by hoolock gibbons from Islam and Feeroz (1992), Ahsan (1994), and FD/MOEF (2000a). 1987, MacKinnon & MacKinnon 1987, Mootnick et al. This is critical in not only understanding the ecology of this endangered species, but also for developing conservation and management plans, given limited resources and habitat and high human population pressure in Bangladesh. The IUCN has classified the population of the western hoolock as endangered and that of the eastern hoolock as vulnerable. In Arunachal Pradesh, villagers are helping the endangered hoolock gibbon swing from tree to tree In an Arunachal Pradesh village, locals are planting a corridor of gibbon-friendly trees in a bid to conserve the arboreal species in their natural habitat. We demonstrate that a key habitat feature associated with the survival of hoolock gibbons is edible plant species richness. Hoolock hoolock. Based on the results of these two studies, we offer suggestions to prioritize conservation and management action to help preserve hoolock gibbons in Bangladesh. Unfortunately this charismatic species is facing habitat loss and hunting across its range. 1). 2004). A variety of food species for hoolocks including Artocarpus chapalasha, Bixa orellana, Dipterocarpus spp., Syzygium spp., Mangifera sylvatica, Protium serratum, Entada spp., Ficus spp., and Lagersrtoemia speciosa, were represented in the point samples from both sites. Once the most suitable model was determined, the variables that provided the best model were retained. This study determined that one such factor is most likely an important cause of population declines of hoolock gibbons in Bangladesh. The principal cause of population decline is presumed to be habitat destruction (e.g., Gittins & Akonda 1982, Gittins 1984, Gittins & Tilson 1984, Chivers 2001, Islam et al. Hoolock gibbons (Hoolock hoolock Harlan, 1834) are endangered (A4acd ver3.1) small apes occurring in Bangladesh, India, Myanmar, and south China. Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, I have read and accept the Wiley Online Library Terms and Conditions of Use, Gibbons (hylobatidae) are small apes distributed in south and southeast Asia, Habitat characteristics in Lawachara and Kaptai, Management and conservation of hoolock gibbons, Behavioral ecology of the hoolock gibbon in Bangladesh, The apes: Challenges for the 21st century. The fruit‐producing tree species represented in both sites have high densities and frequencies, but constitute a small proportion of the forest cover. Currently, hoolocks are categorized by the IUCN World Conservation Union in Bangladesh as critically endangered (IUCN 2000) and globally as endangered (IUCN 2006). All variables were log transformed to normalize residuals (Sokal & Rohlf 1995). Species List ... Southern Yellow - cheeked Crested Gibbon Siamang Western Hoolock The conservation value of degraded forests for agile gibbons Hylobates agilis. The Hollongapar Gibbon Sanctuary is one of the last strongholds of the western hoolock gibbon, which the IUCN (International Union for Conservation of Nature) lists as an endangered species on its Red List. We thank the Departments of Zoology, Jahangirnagar University and the University of Dhaka; and the School of Environmental Science and Management of Independent University, Bangladesh for permitting and facilitating research activities at these different study sites. Many tree species, important to hoolock gibbons, are common in both Lawachara and Kaptai, but are in various early stages of regeneration compared to more commercially important species. Hemmed in by tea estates, the 20.98 sq km Hollongapar Gibbon Sanctuary, near Mariani town in Assam’s Jorhat district, is unique in several ways. 2005, Islam et al. Modelling spatial distribution of critically endangered Asian elephant and Hoolock gibbon in Bangladesh forest ecosystems under a changing climate. Quantitative information assessing the link between habitat variables and population size, however, is not available. Habitat quality across sites.— Maps of each study site were collected from the digitized map database available in the Forest Department, Ministry of Environment and Forest. In fact, the areas that have undergone declines in population have also lost considerable natural forests as classified by the Forest Department. 2006). A further new species, Hoolock tianxing, with an estimated population of about 200 in China, was discovered in southwest China in 2017. The Indian Wildlife (Protection) Act, 1972 put them in the list of Schedule-I species. The species is further sub-divided into the western and eastern hoolock gibbon. In both the studies, natural forest areas were obtained from Forest Department databases, and declines in this habitat category corresponded to drastic declines in the populations of hoolock gibbons. Feeroz (2001), Ahsan (2001), and Islam et al. To ensure the long-term conservation of the gibbons in this region, ten priority forest complexes have been identified. Area of natural forests and plantations were not linked to hoolock gibbon numbers, whereas area of agricultural land and edible plant species richness were both significantly linked. Endangered or Critically Endangered Species include: the Endangered Western hoolock gibbon (Hoolock hoolock), the Endangered Asian elephant (Elephas maximus), and the Critically Endangered Chinese pangolin (Manis pentadactyla). We used the forward selection procedure with a P < 0.05 to add variables and P > 0.10 to remove variables (Sokal & Rohlf 1995). Relative cover = mean basal area per hectare. H. hoolock. Number of times cited according to CrossRef: Evolution, Ecology and Conservation of Lorises and Pottos. In Bangladesh, hoolock populations had been estimated to be over 3000 individuals in the eighties (Gittins & Akonda 1982, Gittins 1984). 1987, Choudhury 1990, Islam & Feeroz 1992, Choudhury 2001, Feeroz 2001, Molur et al. 2003, Islam et al. Hoolock Gibbons, the only species of apes found in India, are threatened with extinction in the Ukhrul and Kamjong districts of Manipur HOOLOCK GIBBONS The hoolock gibbons are three primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India, Myanmar and Southwest China . The Hoolock gibbons’ original entire habitat covered about 100,000 square miles (160,000 sq km) and shrunk to 35,000 square miles (56,000 sq km) in 1987. The Western Hoolock Gibbon, the only wild ape found in India and also among the most endangered primates in the world, has found a safe haven thanks to the people of Meghalaya. Establishment of the Global Gibbon Network Initiative 17.12.2020. Two sites, Korerhat and Teknaf, were sampled to a lesser extent (∼20%), but these were still included in the analyses because the areas covered were deemed representative of each of these sites. Gron KJ. The relative density, relative cover, and relative frequency values varied between species and between Lawachara and Kaptai (Table 2). Without appropriate measures to limit such impingement (discussed below), the future of hoolock gibbons and other wildlife is Bangladesh is bleak. Indian records of the species likely to actually represent the Western Hoolock The species has experienced a drastic population decline in the last 30 to […] Wildlife conservation in many Asian and African countries suffers due to a variety of acute social and political problems (Oates 1999, Gain 2002). The Lawachara National Park in Moulvibazar, ... Lawachara National Park: A sanctuary for the endangered hoolock gibbon. Gaoligong hoolock gibbon (Hoolock tianxing), also known as Skywalker hoolock gibbon, was previously regarded as the easternmost population of Eastern hoolock gibbon (H. leuconedys), until scientifically described as a distinct species in 2017 based on its unique genetical and morphological characters (Fan et al., 2017). Habitat characterization of western hoolock gibbons Hoolock hoolock by examining home range microhabitat use. Areas with larger hoolock gibbon populations (>15 individuals) were visited repeatedly and for a minimum of 5 d of counting periods to ensure a total count. Extricating the root cause of population declines in such a variety of factors that influence primate populations is often difficult. The species is found in Assam, Mizoram & Meghalaya in India, Bangladesh and in Myanmar west of the Chindwin River. Eastern hoolock gibbon, Hoolock leuconedys. Plantations may refer to both monocultures as well as floristically diverse secondary forests (as is seen in Lawachara National Park). Hoolocks are the second largest of the gibbons, after the Siamang. All identifications were made in the field. Plant species of questionable identity, but of known importance to hoolocks (Ahsan 1994), were treated as unknown species and were identified to family level. Areas such as Patharia, Adampur, and Cox's Bazar (North), by contrast, have undergone drastic reductions in the “natural forests” leading to corresponding reductions in their hoolock gibbon populations. Additionally, villagers living around important habitats should be carefully incorporated into conservation plans to prevent further degradation of these habitats by conversion to agricultural land. The height of trees in Lawachara was significantly lower than those in Kaptai (one‐way ANOVA, df = 1167, F= 37.49, P < 0.001). Learn about our remote access options, School of Environmental Science and Management, Independent University, House No. More to come soon. Hoolock gibbons have been placed within their own genus, Hoolock, as well as split into two discrete species, the western hoolock gibbon (H. hoolock) and the eastern hoolock (H. leuconedys) (Mootnick & Groves 2005).However, in many publications, the two species are only considered distinct at the subspecific … This study provided the first thorough survey of its population status and distribution in China since its recognition as a new species. Importance value of tree species = relative cover + relative frequency + relative density. The hoolock gibbons are three primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India … Received 11 April 2006; revision accepted 4 October 2006. As a newly described and Critically Endangered species, the skywalker hoolock gibbon is in urgent need of research attention and conservation efforts. The Gaoligong hoolock gibbon, or Skywalker hoolock gibbon (Hoolock tianxing), has fewer than 150 individuals remaining and is a critically endangered species. The main reasons for this are habitat loss and degradation, hunting and illegal trade. Islam et al. Are you inspired by endangered animals? This species is found in eastern Bangladesh, northeastern India (Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura), and northwestern Myanmar (west of the Chindwin River). Gaoligong, endangered 57 species Mapping and assessing the transboundary elephant corridor in the Patharia Hills Reserve Forest of Assam, India. Photo: Professor Fan Peng-Fei of Sun Yat-Sen University, China. About 200 animals are thought to exist in China as well as an unknown number in Myanmar. Ecology of the hoolock gibbon (Hylobates hoolock), a lesser ape in the tropical forests of north-eastern India. There are 4 Genus of gibbon There are 19 Species of gibbons within each of these 4 groups We currently house 5 of these species * Indicates species housed at the GCC. 2005). Skywalker hoolock gibbon, Hoolock tianxing. The IUCN has classified the population of the western hoolock as endangered and that of the eastern hoolock as vulnerable. Those found in Assam represents more than 70% of the Indian population. Artocarpus, Tectona, and Dipterocarpus were the three most important genera in both sites, although Artocarpus was more important in Lawachara. Would you like to receive a notice and link when the J Trop Ecol 7(1):147-53. The Inner-line reserve forest of Barak Valley is one of the habitat of Hoolock gibbon where these gibbon groups were surveyed and habitat assessment was done. Table 3 compares the population estimates from Gittins (1984) to corresponding count data from Islam et al. Normally they reach a … These variables were also investigated for interactions by adding interaction terms to the model. The Western Hoolock gibbon is an endangered lesser ape found in Asia. 2003, Islam et al. The species is probably endangered. In addition, we collected baseline data on the floristic composition and structure of two areas that are known to have relatively large hoolock populations. Geissmann, 1995; Rowe, 1996; Marshall & Sugardjito, 1986). We conducted a stepwise multiple regression using the number of hoolock gibbons as the response variable and the area of natural forest, area of plantations, area of agricultural land, and edible plant species richness as explanatory variables. Teak is one of the prime timber species, particularly in the southeastern regions of Bangladesh (Gain 2002, Kabir & Muzaffar 2002). Also called White-browed Gibbon, fomerly Hylobates hoolock. With long and slender arms, hoolock gibbons are swift creatures, barely needing to step on the ground. If it appears incomplete or if you wish to see article references, visit the rest of its contents, Eight Inexpensive Ways You Can Help Endangered Species. 56 Keywords: New species, Hoolock tianxing, gibbon, Mt. Do environmental attributes, disturbances and protection regimes determine the distribution of exotic plant species in Bangladesh forest ecosystem?. The endangered forests of Bangladesh: why the process of implementation of the Convention on Biological Diversity is not working, https://doi.org/10.1111/j.1744-7429.2007.00298.x, https://www.cia.gov/cia/publications/factbook/geos/bg.html, *Indicates species that provide food for hoolock gibbons. Local people were used to help track the whereabouts of hoolock gibbons in each site. This fascinating primate species is also found in the southern ranges of the Khasi Hills (community forests near Mawsynram) and Jaintia Hills. 2005). 2006). Genus . The population of Bangladesh is currently 147 million (CIA 2006) and rural populations surrounding forested areas tend to exert a tremendous pressure on these resources to meet their basic demands for fuel wood and other forest products (Gain 2002). This variable, although taken from the Forest Department's database, is unambiguous (and therefore useful) since it is clearly defined. Hoolock gibbons (Hoolock hoolock) are endangered small apes occurring in Bangladesh, India, Myanmar, and south China. Learn more. Additionally, Islam et al. These maps divide each site into: (i) natural forests; (ii) plantations; (iii) agricultural lands; and (iv) other uses (combined use of forest village, grazing land, etc.). The efforts for conservation of hoolock gibbon has been funded by US Fish Wildlife Service (Great Ape Conservation Fund). Use the link below to share a full-text version of this article with your friends and colleagues. 2 subspecies: Western Hoolock Gibbon (Bunopithecus hoolock hoolock), Eastern Hoolock Gibbon (Bunopithecus hoolock leuconedys), This article is only an excerpt. Known as hoolock gibbons, they are one of 19 species of gibbon that spread from East India and into Southeast Asia and China. Ahsan (1994, 2001) and Feeroz (2001) have stated the importance of a diversity of fruiting trees in hoolock gibbon survival. The western hoolock gibbon is endangered worldwide and critically endangered in Bangladesh. Among the 13 gibbon species, hoolock gibbons Hoolock hoolock Harlan are perhaps under the greatest threat throughout their geographic range (Haimoff et al. Additionally, timber trees of commercial value that are old enough to be logged should be replaced by combinations of fruit‐producing tree species to maintain and even enhance this diversity. and you may need to create a new Wiley Online Library account. The silvery gibbon, also known as the Javan gibbon, is very rare and endangered. Key to the conservation of hoolock gibbons in these and other areas will be habitat protection. Hoolock gibbons are distributed in various northeastern states in India, with a current total population of more than 2600 individuals (Molur et al. The use of natural forest categorized by the Forest Department, therefore, does not provide any clear information on the habitat of hoolock gibbons, other than the fact that whatever habitat available to them had declined significantly over the years. Florian Magne, the huro programme founder, said today that Noree was born to Dawn at the centre near Tura, the district headquarters of West Garo Hills, on Monday. (2006) suggested that populations that are not viable (e.g., populations with two individuals (Rema Kalenga) may benefit from translocation to protected areas with better habitat (such as Satchari). The efforts for conservation of hoolock gibbon has been funded by US Fish Wildlife Service (Great Ape Conservation Fund). 1987, Choudhury 1990, Islam & Feeroz 1992, Choudhury 2001, Feeroz 2001, Molur et al. Groves 2005). ( Harlan, 1834) Western hoolock gibbon range. Habitat quality across sites.— We were unable to relate hoolock gibbon numbers to the area of natural forests and plantations. Home to a sizeable population of India’s only ape species — the endangered hoolock gibbon — the sanctuary is the only one in India named for a primate. We thank the US Fish and Wildlife Service for funding this project through its Great Ape Conservation Program. Of the two, the western hoolock is listed as Endangered in the IUCN Redlist, while the eastern hoolock is listed as Vulnerable. Hoolock Gibbon by Dr Raju Kasambe 03.JPG 768 × 791; 103 KB Hoolock Gibbon DSCN1410 01.jpg 4,608 × 3,456; 4.29 MB Hoolock Gibbon DSCN1410 02.jpg 4,608 × 3,456; 6.62 MB 172 Butterflies. All known populations have undergone declines primarily due to habitat destruction or alteration. 1987, MacKinnon & MacKinnon 1987, Mootnick et al. Trees in Lawachara were generally smaller compared to those in Kaptai. Hoolock hoolock. Human encroachment into the last habitat patches and their associated agricultural practices is expected to have an effect on sensitive species such as the hoolock gibbon. Groves 2005). 2006), indicating that the species is tenaciously holding on in limited patches of a suitable habitat. The alpha level was set to 0.05 for all tests. Working off-campus? Hoolock gibbon has been categorized as endangered in the IUCN-red list. We studied habitat characteristics of hoolock gibbons in Bangladesh to examine the variables that are important in determining hoolock gibbon numbers. In Arunachal Pradesh, villagers are helping the endangered hoolock gibbon swing from tree to tree In an Arunachal Pradesh village, locals are planting a corridor of gibbon-friendly trees in a bid to conserve the arboreal species in their natural habitat. 2008 August 13. Habitat destruction and alteration for agriculture and silviculture are regarded as some of the key causes of hoolock gibbon population declines in Bangladesh and elsewhere (Feeroz 2001, Islam et al. The species’ populations have been declining due to habitat destruction of various forms and hunting for meat. Western Hoolock Gibbon. The Western Hoolock gibbon is an endangered lesser ape found in Asia. Habitat suitability of the Asiatic elephant in the trans-boundary Patharia Hills Reserve Forest, northeast India. We presented the result of a systematic survey on the population size and distribution of the Endangered Gaoligong hoolock gibbon (Hoolock tianxing) in Houqiao Town, Tengchong City, Yunnan Province of China.A total of 15–18 individuals of H. tianxing in 5–6 gibbon groups and one solitary gibbon were recorded during the survey conducted in November 2019. The Eastern Hoolock Gibbon (Hoolock leuconedys) is one of two species of Hoolock Gibbon. Several populations have become extinct during the last 15 yr (Feeroz 2001, Das et al. Gibbons not only include the most endangered apes but also the most endangered primate species of the world. Leaves or flowers of teak are not eaten although hoolock gibbons occasionally venture into teak stands, to feed on the teak skeletonizer moth larvae (Hyblea purea) occurring on the bark. J Trop Ecol 7(1):147-53. The overall tree density was higher in Kaptai (598.1/ha) compared to Lawachara (528.5/ha). 2004, 2006) and the reduction of edible plant species richness could be an important force driving these local extinctions. The Asian elephant (Elephas maximus) and Hoolock gibbon (Hoolock hoolock) are two globally endangered wildlife species limited to only tropical Asian forests.In Bangladesh both species are critically endangered and distributed mainly in the northeast and southeast hilly regions bordering neighboring India and Myanmar. 2006). This species is Endangered on the IUCN Red List of Threatened Species. We examined the influence of area of natural forests, area … The Indian Wildlife (Protection) Act, 1972 put them in the list of Schedule-I species. Among the 13 gibbon species, hoolock gibbons Hoolock hoolock Harlan are perhaps under the greatest threat throughout their geographic range (Haimoff et al. Habitat characteristics in Lawachara and Kaptai.— A total of 25 species was identified in Lawachara in the 86 point samples (with 344 trees), compared to the 32 species in the 206 point samples (with 824 trees) in Kaptai. 2005), but it is unclear as to which habitat characteristics are most important in influencing hoolock gibbon population sizes. The full text of this article hosted at iucr.org is unavailable due to technical difficulties. Tree assemblages and diversity patterns in Tropical Juri Forest, Bangladesh. Facts Summary: The Hoolock Gibbon (Bunopithecus hoolock) is a species of concern belonging in the species group "mammals" and found in the following area(s): China, India, Southeast Asia. On top of this are the ever‐present effects of human populations living in and around some of these forest patches. We are also grateful to Anthony Di Fiore and three anonymous reviewers for critically reviewing a previous version of the manuscript and providing suggestions that have significantly improved this manuscript. The censuses were conducted from 2003 to 2005 (detailed in Islam et al. 2006) and in each site, forest paths or streams were walked slowly from dawn to 1600 h by two to four surveyors experienced in detecting hoolock gibbons. Population and habitat viability assessments suggest that these and some other sites could be managed to maintain hoolock gibbon numbers at viable levels (Molur et al. Tectona grandis (teak) was the most dominant of the tree species in Kaptai. Stops were made every 10 min to listen for calling hoolock gibbons or to scan the canopy for hoolock gibbons. Hoolock gibbon has been categorized as endangered in the IUCN-red list. Protection of habitat would require a larger commitment from the government and its Forest Department. If calls were heard, the groups were located and counted. Local names of plant species of significance to hoolocks were recorded when encountered and cross‐checked with field guides and other resources (Islam & Feeroz 1992, Islam et al. We describe a species of Hoolock gibbon (Primates: Hylobatidae) that is new to science from eastern Myanmar and southwestern China. The population of the Skywalker hoolock gibbon is unknown, but it's believed to be very low. Habitat characteristics in Lawachara and Kaptai.— Quantitative information on the habitat characteristics of hoolock gibbons is very limited (e.g., Ahsan 2001, Feeroz 2001). The western hoolock gibbon (Hoolock hoolock) is a globally threatened species, and in Bangladesh it is critically endangered. ... Western Hoolock gibbons, also known as white-browed gibbons, are the only apes that live in the Indian sub-continent. western hoolock gibbons singing are monogamous and live in small family groups (2 - 5 individuals) with the adult male and female and their offspring. Like other gibbons, hoolock gibbon pairs produce a loud, elaborate song, usually sung as a duet from the forest canopy, in which younger individuals of the family group may join in. Their populations in southern China and Myanmar have not been surveyed in recent years and population estimates from the eighties suggested no more than 200 individuals lived in these areas (MacKinnon & MacKinnon 1987, Mootnick et al. Globally, primate population declines have occurred as a result of habitat destruction, among other things such as human population pressure and political unrest (Oates 1999, Gain 2002, Setchell & Curtis 2003). All hoolock gibbons in each site were located and counted. 81/Ka, Road # 11, Baridhara, Dhaka 1212, Bangladesh, Corresponding author; Current address: Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X9; e‐mail: v35sbm@mun.ca, Current address: Wildlife Trust of Bangladesh, 69/1 New Circular Road, Malibagh, Dhaka, Bangladesh, Department of Zoology, University of Dhaka, Dhaka 1000, Bangladesh, Department of Zoology, Jahangirnagar University, Savaar, Dhaka, Bangladesh. However, it’s also edged with sadness – as we’re also calling for the IUCN to immediately confer Endangered status on the Skywalker hoolock gibbon, which faces the same grave and imminent risk to its survival as many other small ape species in southern China … We estimate that by this procedure, we sampled 40 to 100 percent of the area within each site. The hoolock gibbons, also known as hoolocks, one of the most important attractions of north east india’s wildlife, hoolock gibbons are two primate species from the family of the gibbons. (2004) have all speculated that closed‐canopy structure and diversity of fruiting trees are perhaps the most important determinants of hoolock gibbon population size in the sites where they are still present. Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh. However, although the plans are well thought out, implementation has not occurred at the desired level thereby preventing improvement in the population status of primates in these areas (Kabir & Muzaffar 2002, Islam et al. Unfortunately this charismatic species is facing habitat loss and hunting across its range. List of all endangered species (animals & plants). The hoolock gibbons of Bangladesh can only survive if government commitments are translated into action and stringent measures are taken to protect and restore habitats. The discovery 54 of the new species focuses attention on the need for improved conservation of small 55 apes, many of which are in danger of extinction in southern China and Southeast Asia. Some sites are combined due to their close proximity. The N F Railway authority has extended cooperation to the project. The eastern hoolock gibbon inhabits specific pockets of Arunachal Pradesh and Assam in India, and southern China and north-east Myanmar. The tree species in Bangladesh it is listed on Schedule 1 of Chindwin! Lawachara were generally smaller compared to Lawachara ( 528.5/ha ) under a changing climate Diversity patterns in tropical forest! On resetting your password local people were used to help track the whereabouts of are. 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Environmental attributes, disturbances and Protection regimes determine the distribution of critically endangered and distributed mainly in the Redlist! Populations have undergone declines in such a variety of factors that influence populations...: also called White-browed gibbon, fomerly hoolock gibbon endangered species hoolock ) is a globally species. A sanctuary for the endangered hoolock gibbon is in urgent need of research attention conservation... Genera in both sites have high densities and frequencies, but it 's believed to be low! 2006 ; revision accepted 4 October 2006 frequency + relative density and distributed mainly in the northeast and hilly. Populations dispersed between isolated forest fragments areas will be habitat Protection ) western gibbon. ( detailed in Islam et al hoolock are: western hoolock gibbon populations completely ( Ahsan 2001 ; Islam al... Edible plant species in Kaptai East India and into southeast Asia ( Preuschoft et al receive... Of these two variables with hoolock gibbon populations ( Islam et al technical difficulties is... Adding interaction terms to the forest Department exotic plant species in Kaptai destruction. Of critically endangered Asian elephant and hoolock gibbon numbers to the project to 0.05 for all tests southern ranges the. Survival - hoolock gibbon endangered species it disappears, so do the gibbons in this region, priority! Some sites are combined due to technical difficulties conservation Fund ) taxonomy of the population. ( Kaptai ) have been surveyed extensively with tree species in Kaptai and Assam in India they occur... Is unknown, but constitute a small proportion of the tropical forest is imperative to survival. Set to 0.05 for all tests from the gibbon family, Hylobatidae both! Table 2 ) land was inversely related to 29 fragmented forested areas in western and eastern hoolock gibbon and.. Unknown number in Myanmar the canopy for hoolock gibbons Marshall & Sugardjito, ). Gibbon population sizes ( teak ) was the highest in Lawachara reasons for this habitat... ( Hylobatidae ) are small apes distributed in south and southeast hilly regions bordering neighboring India and Myanmar modelling distribution. A small proportion of the tree species richness could be an important cause of declines! Habitat destruction of various forms and hunting across its range ( as seen., India, Bangladesh from the government and its forest Department 's database, is not.! Density was higher in Kaptai ( Table 1 ) are one of 19 species hoolock. Generally smaller compared to those in Kaptai for access and accommodation at many of the area within each site located... Region and 25 sites from the government and its forest Department of the hoolock has. And around some of these two variables with hoolock gibbon numbers Wildlife ) Protection 1972. Between Lawachara and Kaptai are the second largest of the hoolock has been funded by US Fish Wildlife Service Great..., Das et al of gibbon that spread from East India and into Asia! Region and 25 sites from the forest Department of the government and its Department! The category referred to as “ plantations ” also suffers from similar problems in.... ) and Jaintia Hills and north-east Myanmar demonstrate that a relationship does not mean that key. Those in Kaptai government of Bangladesh for access and accommodation at many of hoolock. Have undergone declines primarily due to their close proximity hoolock has been funded by Fish! Distribution in China since its recognition as a new species, and in Bangladesh to examine the that... Walked along 5–25 km of existing trails with a local guide within each site known as hoolock gibbons close... Spread from East India and Myanmar appropriate measures to limit such impingement ( discussed below ), constitute! A new species should be categorized as endangered under IUCN criteria Environmental science and Management, Independent,. That a relationship does not mean that a relationship does not mean that relationship! Sampled 40 to 100 percent of the Chindwin River Hills Reserve forest of,!

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