Male Mating Interest Varies with Female Fecundity in Pan Troglodytes Schweinfurthii of Kanyawara, Kibale National Park

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Male Mating Interest Varies with Female Fecundity in Pan Troglodytes Schweinfurthii of Kanyawara, Kibale National Park

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dc.contributor.author Wrangham, Richard W.
dc.contributor.author Thompson, Melissa Emery
dc.date.accessioned 2010-03-10T16:20:15Z
dc.date.issued 2008
dc.identifier.citation Thompson, Melissa E., and Richard W. Wrangham. 2008. Male mating interest varies with female fecundity in Pan troglodytes schweinfurthii of Kanyawara, Kibale National Park. International Journal of Primatology 29(4): 885-905. en_US
dc.identifier.issn 0164-0291 en_US
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:3716622
dc.description.abstract Female chimpanzees mate promiscuously during a period of extended receptivity marked by prominent sexual swelling. Recent studies of wild chimpanzees indicate that subtle variations in swelling size could act as a reliable cue of female fertilization potential both within and between cycles (Emery and Whitten Behavioral Ecology and Sociobiology, 54, 340–351, 2003; Deschner et al. Hormones and Behavior, 46, 204–215, 2004). Copulation rates increase during the periovulatory period and during conception cycles (Deschner et al. Hormones and Behavior, 46, 204–215, 2004; Emery Thompson American Journal of Primatology, 67, 137–158, 2005a), suggesting that males may be able to assess female fertilization potential. We asked whether facultative timing of copulation in Kanyawara chimpanzees was due to increased male mating interest or to increased female proceptivity during the most fecund days. We assessed multiple measures of male mating effort in cycles aligned relative to the day of detumescence and compared periovulatory days to other days of maximal swelling, and conception cycles to nonconception cycles. The rate and proportion of male initiative in soliciting sexual behavior increased during periods of highest fertilization potential. Males were also more likely to interrupt copulations, associate with estrous females, and compete with other males when females were most likely to conceive. Females initiated copulations more frequently during conception cycles but did not visibly shift mating behavior within cycles. Our results support the hypothesis that male chimpanzees have the ability to assess the profitability of mating attempts, a trait that may act as a counter-adaptation to female strategies to obscure paternity. We discuss potential cues and the implications for female reproductive strategies. 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/s10764-008-9286-1 en_US
dc.relation.hasversion http://www.fas.harvard.edu/~kibale/publications.html en_US
dash.license META_ONLY
dc.subject attractiveness en_US
dc.subject chimpanzees en_US
dc.subject fecundity en_US
dc.subject sexual behavior en_US
dc.subject sexual swellings en_US
dc.title Male Mating Interest Varies with Female Fecundity in Pan Troglodytes Schweinfurthii of Kanyawara, Kibale National Park en_US
dc.type Journal Article en_US
dc.description.version Version of Record en_US
dc.relation.journal International Journal of Primatology en_US
dash.depositing.author Wrangham, Richard W.
dash.embargo.until 10000-01-01

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