Association Patterns Among Wild Chimpanzees (Pan Troglodytes Schweinfurthii) Reflect Sex Differences in Cooperation

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Association Patterns Among Wild Chimpanzees (Pan Troglodytes Schweinfurthii) Reflect Sex Differences in Cooperation

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dc.contributor.author Wrangham, Richard W.
dc.contributor.author Gilby, Ian C.
dc.date.accessioned 2010-02-24T15:24:34Z
dc.date.issued 2008
dc.identifier.citation Gilby, Ian C., and Richard W. Wrangham. 2008. Association patterns among wild chimpanzees (pan troglodytes schweinfurthii) reflect sex differences in cooperation. Behavioral Ecology and Sociobiology 62(11): 1831–1842. en_US
dc.identifier.issn 0340-5443 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3693704
dc.description.abstract Theory predicts that frequent dyadic association should promote cooperation through kin selection or social tolerance. Here we test the hypothesis that sex differences in the strength and stability of association preferences among free-ranging chimpanzees conform to sex differences in cooperative behavior. Using long-term data from the Kanyawara chimpanzee (Pan troglodytes schweinfurthii)community (Kibale National Park, Uganda), we calculated indices of intra-sexual dyadic association over a 10-year period. We found that (1) male–male dyads had significantly stronger association indices than female–female dyads, (2) the pattern of association preferences in both sexes changed little over the entire study period, and (3) when comparing periods with different alpha males, changes in association strength were more frequent among males. These results demonstrate that both the strength and stability of association patterns are important components of social relationships. Male chimpanzees, which are characterized by frequent cooperation, had association preferences that were both strong and stable, suggesting that forming long-term bonds is an important dominance strategy. However, the fact that male association patterns were sensitive to upheaval in the male dominance hierarchy suggests that males also take advantage of a changing social climate when choosing association partners. By contrast, the overall strength of female associations was relatively weak. Female association preferences were equally stable as males’; however, this reflected a dyad’s tendency to be found in the same party rather than to associate closely within that party. Therefore, in this community, female association patterns appear to be more a consequence of individual ranging behavior rather than a correlate of cooperation. en_US
dc.description.sponsorship Anthropology en_US
dc.language.iso en_US en_US
dc.publisher Springer Verlag en_US
dc.relation.isversionof doi:10.1007/s00265-008-0612-6 en_US
dash.license META_ONLY
dc.subject association patterns en_US
dc.subject social bonds en_US
dc.subject cooperation en_US
dc.subject sex differences en_US
dc.subject alliance en_US
dc.subject chimpanzee en_US
dc.title Association Patterns Among Wild Chimpanzees (Pan Troglodytes Schweinfurthii) Reflect Sex Differences in Cooperation en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal Behavioral Ecology and Sociobiology en_US
dash.depositing.author Wrangham, Richard W.
dash.embargo.until 10000-01-01

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  • FAS Scholarly Articles [6466]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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