Abstract # 1009 Event # 105:

Scheduled for Friday, August 19, 2005 11:30 AM-11:45 AM: Session 7 (Parliament Room) Oral Presentation

The Impact of Human Habitat Alteration on the Diet and Activity Patterns of Macaca tonkeana in Lore Lindu National Park, Sulawesi, Indonesia

E. P. Riley
Dept. of Anthropology, University of Georgia, Athens, GA 30602, USA
     The objective of this study was to examine the impact of human habitat alteration, resulting from the clearing of forest for agriculture and small-scale forest product collection, on the diet and activity patterns of Macaca tonkeana. Two groups, which occupied habitats with different levels of disturbance, were observed using scan sampling from June 2003 - April 2004. Species richness, food species density, basal area of food trees, and fruit production were found to be greater in the minimally-altered habitat (CH), indicating that habitat quality is greater when disturbance is minimal. For the group in the heavily-altered habitat (Anca), alternative foods accounted for a significantly greater proportion of the diet (F = 5.51, P = 0.014). Dietary diversity was significantly lower in the Anca group (t = -1.85, P < 0.05), whereby 52% of the diet was comprised of the palm fruits from Arenga pinnata. The Anca group, despite its small group size (6-9 animals), spent a significantly greater proportion of time foraging (F = 6.02, P = 0.008) than the CH group (26-28+ animals), pointing to an effect of habitat quality over and above any group size effect. Group size may have been more explanatory for observed between-group differences in time spent moving and resting. The results suggest that Tonkean macaques show ecological and behavioral flexibility in response to human-induced changes in their habitat.