Abstract # 74:

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


B. E. Raboy1,2,3, G. R. Canale2 and J. M. Dietz3
1Smithsonian National Zoological Park, Department of Conservation Biology, 3001 Connecticut Ave NW, Washington, DC 20008, USA, 2Instituto de Estudos Socioambientais no Sul da Bahia, 3University of Maryland
     Little is known about the ecology of Wied’s black tufted ear marmosets (Callithrix kuhli) in the wild, in comparison to five other Atlantic Forest marmoset species. We investigated the behavior and ranging patterns in 7 groups of C. kuhli between 1995 and 1999 in Una Biological Reserve in Southern Bahia, Brazil. Six groups were followed for short periods to obtain information about group compositions and home range use. We focused on one habituated group to collect behavioral data (N = 570 hours). Home range averaged 41.7 ha for all groups using minimum convex polygon methods. Secondary forest was 12.2% of the focal group’s home range, but made up 54.8% of their core area. The group averaged 1500m per day, spending 32% of their time traveling and 21% foraging and feeding. The marmosets ate from 16 species of fruits, 3 of nectar, and 4 of exudates, in addition to animal prey. Home ranges were larger than previously reported, likely due to increased availability of mature forest at this study site. In these habitats, gum resources may be less abundant and animals may travel more to obtain food. C. kuhli is susceptible to forest fragmentation occurring extensively in the region that along with invasion of their range by C. penicillata, are considerable threats to their long-term survival. We argue for their placement in the IUCN ‘Vulnerable’ category.