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Male dominance rank, mating and reproductive success in captive bonobos (Pan paniscus)

Marvan, R., Stevens, J. M. G., Roeder, Amy Diane, Mazura, I., Bruford, Michael William and de Ruiter, J. R. 2006. Male dominance rank, mating and reproductive success in captive bonobos (Pan paniscus). Folia Primatologica 77 (5) , pp. 364-376. 10.1159/000093702

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In the recent past, application of DNA genotyping techniques has enabled researchers to more accurately test relationships between dominance rank (DR), mating success (MS) and reproductive success (RS). Paternity studies often reveal that reproductive outcome does not always correlate with male DR and/or MS and thus open room for discussion and interpretation of alternative reproductive tactics of both sexes. In this study, we analysed male DR, MS and RS in a group of bonobos at Twycross Zoo (UK). Genetic relationships were determined using 8 tetrameric microsatellite loci. Despite clear and asymmetric dominance relationships, analysed using normalised David's scores based on a dyadic index of dominance among the group's 3 mature males, we found that the most dominant male did not sire the most offspring. In fact, both infants conceived during the observation period were found to be sired by the lower-ranking males. Although the alpha male had almost exclusive mating access to one of the females during the time she was showing a maximal anogenital swelling, her infant was sired by the lowest-ranking male who mostly mated with her when outside the maximal swelling period. This result suggests that either sperm competition operates and/or ovulation is decoupled from the phase of maximal anogenital swelling which could allow greater female choice.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Sustainable Places Research Institute (PLACES)
Uncontrolled Keywords: Pan paniscus; Dominance; Mating behaviour; Reproductive success; Paternity; Anogenital swelling
Publisher: Karger
ISSN: 0015-5713
Last Modified: 04 Jun 2017 06:32

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