Abstract # 19:

Scheduled for Thursday, June 20, 2013 10:15 AM-10:30 AM: Session 1 (San Geronimo Ballroom B) Symposium


A. Widdig1,2
1Jr. Research Group of Primate Kin Selection, Department of Primatology, Max-Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany, 2Institute of Biology, University of Leipzig, 04103 Leipzig, Germany

In female philopatric species, there is extensive evidence that the most pronounced bonds are formed among maternally related females. However, recent studies suggested that individuals of several primate species also recognize their paternal kin as they socially prefer paternal kin over non-kin. How these kin bonds develop through ontogeny, what mechanisms and cues are involved in paternal kin recognition is addressed in a long-term study on the free-ranging rhesus macaque population at Cayo Santiago (Puerto Rico) using different methodological approaches. First, combining behavioral observations from birth to maturation (>3500 hrs) with paternity data, results of a GLMM revealed a significant social preference of paternal kin over unrelated group member by male subjects at the age of four (prior to natal dispersal) when compared to female subjects of the same age (prior to first breeding). Considering focal subjects and adult group males only, paternity in interdependence with other factors was a significant predictor of male-infant affiliation, peaking at two years of age and being independent of mother's presence. Second, the most likely mechanisms (familiarity and phenotype matching) of paternal kin discrimination have been investigated via acoustic and visual cues using field experiments (playbacks and looking-time tasks, respectively). Results of a GLMM suggested that both mechanisms and multimodal cues are involved. Overall, data strengthen the evidence that paternal relatedness influenced the evolution of social behavior in primates.