Sexual selection and the differential effect of polyandry

Collet, Julie, Richardson, David S., Worley, Kirsty and Pizzari, Tommaso (2012) Sexual selection and the differential effect of polyandry. Proceedings of the National Academy of Sciences of the United States of America, 109 22: 8641-8645. doi:10.1073/pnas.1200219109


Author Collet, Julie
Richardson, David S.
Worley, Kirsty
Pizzari, Tommaso
Title Sexual selection and the differential effect of polyandry
Journal name Proceedings of the National Academy of Sciences of the United States of America   Check publisher's open access policy
ISSN 0027-8424
1091-6490
Publication date 2012-05
Year available 2012
Sub-type Article (original research)
DOI 10.1073/pnas.1200219109
Volume 109
Issue 22
Start page 8641
End page 8645
Total pages 5
Publisher National Academy of Sciences
Collection year 2013
Language eng
Formatted abstract
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.
Keyword Cryptic Female Choice
Sperm Competition
Selection Gradient
Opportunity of selection
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Biological Sciences Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 32 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 31 times in Scopus Article | Citations
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Created: Tue, 09 Apr 2013, 12:18:03 EST by Julie Collet on behalf of School of Biological Sciences