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- W2055372914 abstract "Considerable controversy exists concerning possible effects of sexually selected phenotypes via intermale competition on reproductive success. The mandrill (Mandrillus sphinx) is an extreme example of evolution by sexual selection, and hence we have studied a semi-free-ranging colony of mandrills in Gabon to gather information on male rank, mating success and paternity, as determined by DNA fingerprinting. Two morphological variants or adult male were identified; ‘fatted’ males, with maximum secondary sexual coloration, which occupied dominant positions in the social group, and ‘non-fatted’ males, with muted secondary sexual adornments, smaller testes and lower plasma testosterone levels, which lived as peripheral/solitary individuals. DNA fingerprinting analyses on infants born over five successive years showed that only the two most dominant, fatted males in the group had fathered off spring. Throughout the annual mating season these males attempted to mate-guard and copulate with females during periods of maximal sexual skin tumescence. Male rank and mating success were strongly positively related and the alpha male sired 80–100% of the resulting offspring during three consecutive years. Non-fatted adult males and group associated subadult males engaged in infrequent, opportunistic matings and did not guard females. Loss of alpha status resulted in a fall in reproductive success, but the effect was gradual; the deposed alpha male continued to father 67% and 25% of infants born during the next two years. Thus these results of behavioural and genetic studies on mandrills demonstrate unequivocally that clear-cut relationships exist between male secondary sexual development, social dominance, copulatory behaviour and reproductive success in the social group." @default.
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- W2055372914 date "1993-12-01" @default.
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- W2055372914 title "Reproductive success in the mandrill, <i>Mandrillus sphinx</i> : correlations of male dominance and mating success with paternity, as determined by DNA fingerprinting" @default.
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- W2055372914 doi "https://doi.org/10.1111/j.1469-7998.1993.tb01938.x" @default.
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