Document Detail


Sexual selection and the differential effect of polyandry.
MedLine Citation:
PMID:  22592795     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In principle, widespread polyandry (female promiscuity) creates potential for sexual selection in males both before and after copulation. However, the way polyandry affects pre- and postcopulatory episodes of sexual selection remains little understood. Resolving this fundamental question has been difficult because it requires extensive information on mating behavior as well as paternity for the whole male population. Here we show that in replicate seminatural groups of red junglefowl, Gallus gallus, polyandry eroded variance in male mating success, which simultaneously weakened the overall intensity of sexual selection but increased the relative strength of postcopulatory episodes. We further illustrate the differential effect of polyandry on pre- and postcopulatory sexual selection by considering the case of male social status, a key determinant of male reproductive success in this species. In low-polyandry groups, however, status was strongly sexually selected before copulation because dominants mated with more females. In high-polyandry groups, sexual selection for status was weakened and largely restricted after copulation because dominants defended paternity by mating repeatedly with the same female. These results reveal polyandry as a potent and dynamic modulator of sexual selection episodes.
Authors:
Julie Collet; David S Richardson; Kirsty Worley; Tommaso Pizzari
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-05-16
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  109     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-05-30     Completed Date:  2012-08-24     Revised Date:  2013-06-25    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  8641-5     Citation Subset:  IM    
Affiliation:
Department of Zoology, Edward Grey Institute, University of Oxford, Oxford OX1 3PS, United Kingdom.
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MeSH Terms
Descriptor/Qualifier:
Algorithms
Animals
Chickens / physiology*
Female
Fertility / physiology
Male
Models, Biological
Reproduction / physiology*
Sexual Behavior, Animal / physiology*
Grant Support
ID/Acronym/Agency:
//Biotechnology and Biological Sciences Research Council
Comments/Corrections

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