論文

査読有り 筆頭著者 責任著者
2018年1月

Bet-hedging against male-caused reproductive failures may explain ubiquitous cuckoldry in female birds

JOURNAL OF THEORETICAL BIOLOGY
  • Yukio Yasui
  • ,
  • Jin Yoshimura

437
開始ページ
214
終了ページ
221
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jtbi.2017.10.029
出版者・発行元
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

The origin and maintenance of polyandry is one of the key unresolved questions in evolutionary biology. In particular, extra-pair paternity (EPP) due to polyandry is observed in most (socially-) monogamous female birds and the frequency of EPP is surprisingly high (up to 72% in a clutch on average in some species). Many case-by-case hypotheses have been presented to explain this phenomenon but a ubiquitous explanation is still lacking. One possible general explanation is bet-hedging, which is a strategy to avoid the risk associated to mating with a single unsuitable male and thus to minimize the chances of complete reproductive failure by the female. Here, we present a mathematical solution to demonstrate that bet-hedging polyandry becomes highly effective if the risk of extinction of a female lineage attributable to male deficiencies is high in small subpopulation or under limited mate availability. Therefore, cuckoldry or polyandry may be a female strategy to spread the risk of extinction of her genotype over multiple males. The results agree well with the observed EPP frequencies in natural populations and the results of a meta-population simulation model. Our theory contributes new insights applicable not only to birds but also to a broad taxonomic range of animals. (C) 2017 Elsevier Ltd. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.jtbi.2017.10.029
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000417228400022&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.jtbi.2017.10.029
  • ISSN : 0022-5193
  • eISSN : 1095-8541
  • Web of Science ID : WOS:000417228400022

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