Abstract # 168:

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

Activity Budget and Microhabitat in the red-bellied lemur, Eulemur rubriventer.

S. R. Tecot
University of Texas at Austin, Department of Anthropology, 1 University Station, C3200, Austin, Texas 78712, USA
     To determine the effect of microhabitat on activity budget, this study examined five Eulemur rubriventer (red-bellied lemur) groups in Ranomafana National Park, Madagascar. I studied two groups in a high-altitude primary rain forest (Vato), and three groups in low-altitude secondary rain forest (Tala: heavily logged 1986-1989, with a discontinuous canopy, smaller trees, and Chinese guava). I recorded all occurrences of aggressive, feeding, grooming, resting, traveling, and playing behaviors in focal individuals continuously for eight hours during the day, rotating focal animals daily. Data were collected January 2004-March 2005 (n=2487 hours). Groups combined spent 0.002% of their time aggressing (Tala: 0.0004%; Vato: 0.003%), 0.18% playing (Tala: 0.13%; Vato: 0.22%), 3.21% grooming (Tala: 2.84%, Vato: 3.52%), 10.53% traveling (Tala: 10.56%; Vato: 10.51%), 11.33% feeding (Tala: 9.72%; Vato: 12.65%), and 74.75% resting (Tala: 76.75%; Vato: 73.11%). Chi square tests found no significant site differences. However, one group in Tala displayed abnormal behaviors associated with group instability. When removed from analysis, feeding differences were significant (n1=4, n2= 5, p=.0143). As food sources in groups’ ranges differed spatiotemporally, feeding, resting, and traveling were analyzed by group. The difference in the distribution of time spent performing these three behaviors was significant across microhabitats, x2 (8, N=2374) = 15.69, p = .047, suggesting that microhabitat may impact this species’ activity budget. Funded by NSF Dissertation Improvement grant #0424234, PCI, Primate Action Fund, and ASP.