Document Detail

Increased hatching success as a direct benefit of polyandry in birds.
MedLine Citation:
PMID:  25333786     Owner:  NLM     Status:  Publisher    
Multiple mating by females is difficult to explain in primarily socially monogamous taxa like birds since mating outside the pair bond often provides no obvious benefit to females. Though indirect selection is often invoked to explain the evolution of polyandry, current evidence suggests that selection on indirect benefits of mating is weak. Here, I consider a direct benefit of remating in birds: increased fertilization success. I test whether increased hatching success of a female's eggs is related to rates of extra-pair paternity, a proxy of polyandry, across 113 bird species. I use two statistical approaches, control for phylogenetic uncertainty, and assess the fit of competing evolutionary models. Results show there is indeed a positive relationship between rates of extra-pair paternity and hatching success in birds. I propose that by mating with many males, females may increase their fertility. I end by discussing the biological rationale for this explanation, alternative interpretations of the results, and how this study furthers our understanding of polyandry and mating system evolution. This article is protected by copyright. All rights reserved.
Luke Reding
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-21
Journal Detail:
Title:  Evolution; international journal of organic evolution     Volume:  -     ISSN:  1558-5646     ISO Abbreviation:  Evolution     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-21     Completed Date:  -     Revised Date:  2014-10-22    
Medline Journal Info:
Nlm Unique ID:  0373224     Medline TA:  Evolution     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
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