Abstract # 174:

Scheduled for Sunday, September 14, 2014 07:00 PM-09:00 PM: Session 22 (Decatur B) Poster Presentation


WILD RHESUS MACAQUE FEMALES ALLOCATE GROOMING DIFFERENTLY THAN THEIR CAPTIVE COUNTERPARTS

A. L. Heagerty1,2, S. K. Seil1,2 and B. McCowan1,2
1University of California Davis, Davis, CA 95616, USA, 2California National Primate Research Center
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     Most comparisons of captive and wild primate behavior focus on time budgets. In this study, we specifically examined female grooming patterns. Due to differences in matriline size, male transfer, and interbirth interval between captive and wild groups, we predicted that wild adult females groom one another less often and groom juveniles more often than captive adult females. Grooming between animals classified by age and sex were recorded in 30-minute scans of four known groups at two sites in northern India. Data were collected from October to December, and comprised 647 records from 59 hours of observation. Methods were repeated for four captive groups at the CNPRC, capturing 1,011 records over 42 hours. A chi-square goodness of fit test showed patterns in captive groups did not match those of wild groups (X2(4)=261, p<0.001). Results contradicted our first prediction that wild females groom one another less than captive females, but supported our second prediction that wild females groom juveniles more than captive females do. In wild groups, on average 49.3% (sd=8.6) of adult females’ grooming records were directed at juveniles, whereas 29.6% (sd=6.1) of captive adult females’ grooming records had a juvenile recipient. Additionally, wild adult females directed less of their grooming to subadult males (µ=7.7%, sd=4.0) than captive females (µ=20.3%, sd=6.1). We propose explanations for these patterns and discuss implications for group cohesion and juvenile development.