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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-4421

Modolo, L; Martin, R D (2008). Reproductive success in relation to dominance rank in the absence of prime-age males in Barbary macaques. American Journal of Primatology, 70(1):26-34.

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In some primate species dominance rank of males is correlated with reproductive success, whereas in other species this relationship is inconsistent. Barbary macaques (Macaca sylvanus) live in a promiscuous mating system in which males are ranked in a dominance hierarchy that influences their access to females. High-ranking males usually monopolize fertile females during their estrous
period and show increased mating activities. Subadult males generally rank below adult males. For Barbary macaque females in the Gibraltar colony, there was no correlation between dominance status and reproductive success. Paternity data for 31 offspring collected over four consecutive breeding seasons were used to test whether male social rank was associated with reproductive success and whether reproductive success was mainly confined to a small number of males. Genetic variation was assessed using 14 microsatellite markers for a dataset of 127 individuals sampled in all five social groups of the Gibraltar colony. Paternity analysis was conducted for offspring in one social group only, where all in-group males were sampled. Eighty-three percent of the offspring could be assigned to an in-group candidate father; none of the extra-group males appeared to have sired an infant. Male dominance rank
was not found to contribute to the observed variation in male reproductive output. Fifty-nine percent of the offspring was sired by two low-ranking males, whereas the two top-ranking males sired one-fifth. A highly significant correlation was found for male age and dominance rank. Reproductive success of subadult males might be explained by the gap in the age distribution of male group members. These
missing prime males are usually regarded as serious competitors for older males. Subadult males may have gained easier access to females in their absence. In addition, the presence of inbreeding avoidance mechanisms, which might also have overpowered possible rank effects, cannot be excluded.


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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Anthropological Institute and Museum
Dewey Decimal Classification:300 Social sciences, sociology & anthropology
Uncontrolled Keywords:Barbary macaque, DNA typing, paternity, microsatellites, rank correlation, inbreeding avoidance, priority-of-access, female mate choice
Date:21 June 2008
Deposited On:20 Oct 2008 12:56
Last Modified:27 Nov 2013 22:44
Funders:A. H. Schultz Foundation and Swiss National Foundation; Grant Number: 5001-034878, 3100-045923
Publisher DOI:10.1002/ajp.20452
Other Identification Number:doi:10.1002/ajp.20452

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