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Patterns of male reproductive behaviour in multi-male groups of mountain gorillas: examining theories of reproductive skew

Patterns of male reproductive behaviour in multi-male groups of mountain gorillas: examining... Patterns of male reproductive behaviour in multi-male groups of mountain gorillas: examining theories of reproductive skew T.S. Stoinski 1,2,3) , S. Rosenbaum 1) , T. Ngaboyamahina 1) , V. Vecellio 1) , F. Ndagijimana 1) & K. Fawcett 1) ( 1 The Dian Fossey Gorilla Fund International, 800 Cherokee Avenue, Atlanta, GA 30315, USA; 2 Zoo Atlanta, 800 Cherokee Avenue, Atlanta, GA 30315, USA) (Accepted: 30 January 2009) Summary The current study examined skew in reproductive behaviour in male mountain gorillas under previously unstudied demographic conditions of large numbers of males. Subjects included 27 males eight to 30 years of age living in three groups in Parc National des Volcans (Rwanda) between June 2003 and January 2007. Rank was a significant predictor of copulations with both multiparous and nulliparous females, although copulations were more evenly distrib- uted between the three top ranking males than previously reported. Copulations by non-alpha males were unaffected by the level of monopolization potential in the group and relatedness to the alpha silverback. Dispersing males copulated with cycling females prior to their disper- sal significantly less than philopatric individuals. As compared to previous studies, we found decreased behavioural reproductive monopolization by the alpha silverback. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Behaviour Brill

Patterns of male reproductive behaviour in multi-male groups of mountain gorillas: examining theories of reproductive skew

Behaviour , Volume 146 (9): 1193 – Jan 1, 2009

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References (55)

Publisher
Brill
Copyright
© 2009 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0005-7959
eISSN
1568-539X
DOI
10.1163/156853909X419992
Publisher site
See Article on Publisher Site

Abstract

Patterns of male reproductive behaviour in multi-male groups of mountain gorillas: examining theories of reproductive skew T.S. Stoinski 1,2,3) , S. Rosenbaum 1) , T. Ngaboyamahina 1) , V. Vecellio 1) , F. Ndagijimana 1) & K. Fawcett 1) ( 1 The Dian Fossey Gorilla Fund International, 800 Cherokee Avenue, Atlanta, GA 30315, USA; 2 Zoo Atlanta, 800 Cherokee Avenue, Atlanta, GA 30315, USA) (Accepted: 30 January 2009) Summary The current study examined skew in reproductive behaviour in male mountain gorillas under previously unstudied demographic conditions of large numbers of males. Subjects included 27 males eight to 30 years of age living in three groups in Parc National des Volcans (Rwanda) between June 2003 and January 2007. Rank was a significant predictor of copulations with both multiparous and nulliparous females, although copulations were more evenly distrib- uted between the three top ranking males than previously reported. Copulations by non-alpha males were unaffected by the level of monopolization potential in the group and relatedness to the alpha silverback. Dispersing males copulated with cycling females prior to their disper- sal significantly less than philopatric individuals. As compared to previous studies, we found decreased behavioural reproductive monopolization by the alpha silverback.

Journal

BehaviourBrill

Published: Jan 1, 2009

Keywords: REPRODUCTIVE SKEW; DEMOGRAPHY; PRIMATE; GREAT APE; FLEXIBILITY; DISPERSAL

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