Female chacma baboons form strong, equitable, and enduring social bonds |
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| Authors: | Joan B Silk Jacinta C Beehner Thore J Bergman Catherine Crockford Anne L Engh Liza R Moscovice Roman M Wittig Robert M Seyfarth Dorothy L Cheney |
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| Institution: | (1) Department of Anthropology, University of California, Los Angeles, CA 90095, USA;(2) Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA;(3) Department of Anthropology, University of Michigan, Ann Arbor, MI 48109, USA;(4) Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA;(5) School of Psychology, University of St. Andrews, St. Andrews, KY16 9JP, United Kingdom;(6) Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA;(7) Department of Psychology, University of Pennsylvania, Philadelphia, PA 19104, USA |
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| Abstract: | Analyses of the pattern of associations, social interactions, coalitions, and aggression among chacma baboons (Papio hamadryas ursinus) in the Okavango Delta of Botswana over a 16-year period indicate that adult females form close, equitable, supportive, and
enduring social relationships. They show strong and stable preferences for close kin, particularly their own mothers and daughters.
Females also form strong attachments to unrelated females who are close to their own age and who are likely to be paternal
half-sisters. Although absolute rates of aggression among kin are as high as rates of aggression among nonkin, females are
more tolerant of close relatives than they are of others with whom they have comparable amounts of contact. These findings
complement previous work which indicates that the strength of social bonds enhances the fitness of females in this population
and support findings about the structure and function of social bonds in other primate groups. |
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