Abstract # 158:

Scheduled for Friday, June 21, 2013 07:00 PM-09:00 PM: Session 21 (SG Foyer ABC) Poster Presentation


ACTIVITY PROFILES OF THE NOCTURNAL OWL MONKEY (AOTUS) DURING THE NIGHT IN A SEMI-NATURAL ENVIRONMENT

B. Yusko1, J. Herrington1 and S. Evans1,2
1Florida International University, 11200 SW 8th Street , DM 256, Miami, Florida 33199, USA, 2DuMond Conservancy for Primates and Tropical Forests Inc.
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     Very little is known about the activity rhythms of nocturnal owl monkeys (Aotus). This study investigated the activity patterns of owl monkeys during the night in a semi-natural environment. Monkeys housed in ten enclosures in groups of 2-3 at the DuMond Conservancy in Miami, Florida were examined between 6:00PM – 6:00AM in January and February, 2013. Data were collected using camera traps attached to the outside of each enclosure and the number of periods of inactivity (no movement) of at least 3,600 seconds was recorded. The data were divided into three 4-hour blocks (6PM – 10PM, 10PM – 2AM, and 2AM – 6AM). A One-Way ANOVA revealed a significant difference between the mean amount of time spent inactive between blocks (F(2,27) = 46.13, p < .001). Tukey’s HSD indicated significant differences between blocks ( p’s < .01) with the least amount of inactivity occurring in block 1 (M = 30 seconds), intermediate amounts in block 2 (M = 4656 seconds), and the highest amount of inactivity in block 3 (M = 7320 seconds). Our data indicate that, unlike other nocturnal primates, owl monkeys are not uniformly active throughout the night. This study is the first to confirm and characterize patterns of inactivity in owl monkeys in a semi-natural environment. These results also validate the use of a novel data collection method, the camera trap.