Abstract # 162:

Scheduled for Friday, August 18, 2006 07:00 PM-09:00 PM: Session 17 (Regency West 1/3 ) Poster Presentation


POPULATION SURVEY OF THE JAVAN GIBBON AT GUNUNG HALIMUN NATIONAL PARK, WEST JAVA, INDONESIA

E. Iskandar1, W. Sinaga1 and R. C. Kyes1,2
1Bogor Agricultural University, Primate Research Center, Bogor, Indonesia, 2Washington National Primate Research Center, University of Washington
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     The Javan or silvery gibbon (Hylobates moloch) is critically endangered with remaining populations restricted to a few protected areas in west and central Java. The aim of this project was to generate critical baseline data on the status of the Javan gibbon and its habitat at Gunung Halimun National Park, West Java. The survey was conducted during December 2004 through September 2005: Line transect sampling was conducted during early morning along four transects located around the Park (i.e., Citarik, Cibeureum, Cisalimar, and Cikaniki, each representing an area of varying levels of habitat quality and human disturbance). Transect lengths averaged 3.5km. An average of 16 survey samples were conducted along each transect. Mean group density was estimated at 3.4 groups/km2 with the highest density observed in the undisturbed primary forest area of Citarik. Group size averaged 2.5 individuals (range: 2-4). Mean population density was estimated at 8.2 individuals/km2. Several other primate species were also observed during the survey including silvered leaf monkey (Trachypitecus auratus), Grizzled leaf monkey (Presbytis comata), and longtailed macaque (Macaca fascicularis). As habitat loss continues throughout West Java, the Gunung Halimun National Park represents an area of great importance to the long-term conservation of the Javan gibbon. This project was supported in part by a Rufford Small Grant for Nature Conservation, the International Primatological Society, and NIH Grant RR-00166.