Abstract # 142:

Scheduled for Friday, August 18, 2006 04:45 PM-05:00 PM: Session 14 (Regency East #2) Oral Presentation

Comparative social behavior of males and females in three genera of socially monogamous platyrrhines

A. Di Fiore1,2, E. Fernandez-Duque3, G. A. Carrillo4 and D. Hurst5
1New York University, Department of Anthropology, New York, NY 10003, USA, 2New York Consortium in Evolutionary Primatology, 3Department of Anthropology, University of Pennsylvania, 4Departamento de Biologia, Universidad Central del Ecuador, 5Department of Anthropology, Stony Brook University
     Socially-monogamous primates are often described as displaying a suite of behavioral characteristics that includes a prolonged and essentially exclusive mating relationship between one male and one female, joint participation by males and females in territory defense, and extensive male involvement in offspring care. Over two years, we collected comparative data on the behavior and social interactions of adult males and females in three genera of socially-monogamous New World monkeys (titis, Callicebus, N = 2 pairs; sakis, Pithecia, N = 2 pairs; and owl monkeys, Aotus, N = 10 pairs) at two different study sites, one in western Amazonia (where the genera occur sympatrically), and one in the seasonal dry forests of NW Argentina (where only owl monkeys are present). Our descriptive data suggest that these three platyrrhines do not all fit the mold of "classic" social monogamy. Among titi and owl monkeys, males invested heavily in infant care, whereas saki males provided little direct paternal care. Differences also existed among these taxa in the quality of the social relationship between pairmates. Saki pairs were less affiliative and engaged less in behavior thought to be instrumental to the development and maintenance of pair bonds (e.g., grooming, coordinated vocal displays) than either titi or owl monkey pairs, and males and females seemed to behave differentially in terms of maintenance of proximity to their partner and in response to extragroup individuals. Results suggest that different ecological and/or social factors may underlie the expression of social monogamy in these three platyrrhines.