Reproductive competition and inbreeding avoidance in a primate species with habitual female dispersal

Vigilant, L., Roy, J., Bradley, B. J., Stoneking, C. J., Robbins, M. M., Stoinski, T. S. (May 2015) Reproductive competition and inbreeding avoidance in a primate species with habitual female dispersal. Behavioral Ecology and Sociobiology, 69 (7). pp. 1163-1172. ISSN 03405443

URL: http://link.springer.com/article/10.1007%2Fs00265-...
DOI: 10.1007/s00265-015-1930-0

Abstract

As in other highly sexually dimorphic, group-living animals, reproduction in gorillas has been largely viewed as the outcome of competition among males. However, females may exert choice via dispersal decisions or choice of partner in multimale groups, and males may also mate selectively. Here, we examine the paternity of 79 wild mountain gorilla offspring born into four groups characterized by stable dominance hierarchies and the presence of mature offspring of the dominant male. We found that on average the dominant male sires the majority (72 %) of the offspring in stable multimale groups and subordinate males also produce offspring, particularly when dominant males become older or the number of competing males increases. Although expected to disperse to avoid inbreeding, only half of the maturing daughters of dominant males left the group in which their father maintained dominance. However, in all five cases of reproduction by a resident daughter of a dominant male, a subordinate male was the sire of the offspring. As females commonly initiate and end copulations, and dominant males may prefer mating with fully mature females, both male and female mate preferences in addition to male competition apparently play a role in reproductive patterns in multimale groups, emphasizing the complexity of social dynamics in one of our closest living relatives. © 2015 Springer-Verlag Berlin Heidelberg

Item Type: Paper
Uncontrolled Keywords: Dominance Fitness Gorilla beringei Gorillas Microsatellite genotyping Reproductive skew
Subjects: organism description > animal behavior
organism description > animal > mammal > primates
CSHL Authors:
Communities: Watson School
Depositing User: Matt Covey
Date: 20 May 2015
Date Deposited: 02 Jun 2015 20:17
Last Modified: 25 Jun 2015 15:02
URI: http://repository.cshl.edu/id/eprint/31553

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