Western hoolock gibbon

Western hoolock gibbon
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Family: Hylobatidae
Genus: Hoolock
Species: H. hoolock
Binomial name
Hoolock hoolock
(Harlan, 1834)
Western Hoolock Gibbon range

The western hoolock gibbon (Hoolock hoolock) is a primate from the Hylobatidae (gibbon) family. The species is found in Assam, Bangladesh and in Myanmar west of the Chindwin River.[2]

Contents

Classification

Mootnick and Groves[3] stated that hoolock gibbons do not belong in the genus Bunopithecus, and placed them in a new genus, Hoolock. This genus was argued to contain two distinct species which were previously thought to be subspecies: Hoolock hoolock and Hoolock leuconedys.[4]

Habitat

In India and Bangladesh it is found where there is contiguous canopy, broad-leaved, wet evergreen and semi-evergreen forests. The species is an important seed disperser; its diet includes mostly ripe fruits, with some flowers, leaves and shoots.

Conservation

There are numerous threats to western hoolock gibbons in the wild, and are now entirely dependent on human action for their survival. Threats include habitat encroachment by humans, forest clearance for tea cultivation, the practice of jhuming (slash-and-burn cultivation), hunting for food and “medicine”, capture for trade, and forest degradation.

Over the last 30-40 years, western hoolock gibbon numbers are estimated to have dropped from more than 100,000 (Assam alone was estimated to have around 80,000 in the early 1970s) to less than 5,000 individuals (a decline of more than 90%).[5] It is considered to be one of the 25 most endangered primates.[6]

Diet

Hoolock gibbons mainly feed on leafs and flower buds from the forest floor, but fresh fruits are an important part of their diet as well.

See also

References

  1. ^ Brockelman, W., Molur, S. & Geissmann, T. (2008). Hoolock hoolock. In: IUCN 2008. IUCN Red List of Threatened Species. Downloaded on 4 January 2009.
  2. ^ Groves, C. P. (1967). "Geographic variation in the hoolock or white-browed gibbon (Hylobates hoolock harlan 1834).". Folia Primatologica 7: 276–283. doi:10.1159/000155125. PMID 5626313. 
  3. ^ Mootnick, A. R. and C. P. Groves (2005). "A new generic name for the hoolock gibbon (Hylobatidae)". Int. J. Primatol 26: 971–976. doi:10.1007/s10764-005-5332-4. 
  4. ^ Mootnick, A. R. (2006). "Gibbon (Hylobatidae) species identification recommended for rescue or breeding centers". Primate Conserv 21: 103–138. doi:10.1896/0898-6207.21.1.103. 
  5. ^ "Western Hoolock Gibbon, Hoolock hoolock". http://www.primate-sg.org/hoolock07.htm. Retrieved 2008-03-10. 
  6. ^ Oates, R.A.; Wallis, J.; Rylands, A.B. et al., eds (2009) (PDF). Primates in Peril: The World's 25 Most Endangered Primates 2008–2010. Illustrated by S.D. Nash. Arlington, VA.: IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI). pp. 1–92. ISBN 978-1-934151-34-1. http://www.primate-sg.org/PDF/Primates.in.Peril.2008-2010.pdf.