Abstract # 9:

Scheduled for Thursday, August 17, 2006 11:15 AM-11:30 AM: Session 1 (Regency East #1) Oral Presentation

Characteristics and Use of Sleeping Sites by Golden Lion Tamarins

S. Hankerson and J. Dietz
University of Maryland, Department of Biology, College Park, MD 20742, USA
     Lion tamarin monkeys (Leontopithecus sp.) are among a small number of primates that repeatedly use a few tree holes for the majority of their sleeping sites. In order to better understand why lion tamarins rely on tree holes as sleeping sites we compared the physical characteristics of frequently-used and infrequently-used sleeping sites at multiple spatial scales. From 1990 to 2004 we recorded 5235 occurrences of sleeping site use by 10 groups of golden lion tamarins (L. rosalia) in Poço das Antas Reserve, Rio de Janeiro State, Brazil. Of those, 63.6% were tree holes. Bamboo accounted for an additional 17.5% of observations, primarily used by one study group. A total of 1530 unique sleeping sites were used, with 1128 of those used only once. Frequently-used tree holes were found to be significantly different from infrequently-used tree holes by way of a logistic regression, with living status and height of entrance included in the model (_112= 35.73, P < 0.002). Live trees were 6.8 times more likely to be used frequently than were dead trees (_2= 11.50, P = 0.0007). The height of entrance to tree holes was lower for frequently-used sites than infrequently-used sites (_2= 5.81, P = 0.02). No habitat level or topography differences were found. Sleeping trees are selected based on their characteristics but the frequency of their use may depend on another factor, such as their location.