Abstract # 1852 Poster # 68:

Scheduled for Thursday, August 17, 2006 07:00 PM-09:00 PM: Session 8 (Regency West 1/3 ) Poster Presentation


POPULATION SURVEY OF THE SULAWESI BLACK MACAQUES AT THE DUASUDARA NATURE RESERVE, NORTH SULAWESI, INDONESIA

S. Laatung1,2, R. C. Kyes2,3,4, A. Mardiastuti4 and J. Onibala2
1Bogor Agricultural University, Graduate Program in Primatology, Bogor, Indonesia, 2Animal Sciences, Sam Ratulangi University, 3Washington National Primate Research Center, University of Washington, 4Forestry, Bogor Agricultural University
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     The Sulawesi black macaque (Macaca nigra) population at the Tangkoko/ Duasudara Nature Reserves in North Sulawesi, Indonesia has been the focus of periodic assessment since the late 1970s. Past surveys have indicated a decline in the population. Ongoing habitat loss and hunting remain the primary threats to the macaques in these adjacent reserves. The present survey focused on the M. nigra population at the Duasudara Nature Reserve and was conducted over a four-month period (May through August 2005). Line transect sampling was conducted during early morning and late afternoon along three transects located around the reserve. Transect length averaged 2.8km. A total of 20 survey samples (representing 168km with a strip width of 100m) were completed along each transect. There were a total of 23 group sightings for a mean group density of 1.4 groups/km2. Group size, based on reliable group counts, averaged 15.5 individuals (range: 7-21). Mean population density was estimated at 23.8 individuals/km2. These data suggest further, albeit modest, decline of the population in Duasudara (about 5%) - a finding that is consistent with recent surveys in Tangkoko (Kyes et al., 2004). Without increased efforts to reduce hunting pressure and habitat loss, the future of this population is in question. This project was supported in part by an ASP Conservation Small Grant and NIH Grant RR-00166.