期刊
EVOLUTION
卷 71, 期 6, 页码 1653-1669出版社
OXFORD UNIV PRESS
DOI: 10.1111/evo.13242
关键词
Aggression; Gallus; polyandry; reproductive senescence; sexual networks; sperm competition
资金
- PhD CASE scholarship from the Biotechnology & Biological Sciences Research Council
- Aviagen Ltd [BB/L009587/1]
- industrial LINK award from the Biotechnology & Biological Sciences Research Council
- Natural Environment Research Council [NE/H006818/1, NE/H008047/1]
- Aviagen (R) [BB/L009587/1]
- Biotechnology and Biological Sciences Research Council [BB/L009587/1, 978662] Funding Source: researchfish
- Natural Environment Research Council [NE/H006818/1, NE/C507196/1, NE/H008047/1] Funding Source: researchfish
- BBSRC [BB/L009587/1] Funding Source: UKRI
- NERC [NE/H008047/1, NE/H006818/1] Funding Source: UKRI
A challenge in evolutionary biology is to understand the operation of sexual selection on males in polyandrous groups, where sexual selection occurs before and after mating. Here, we combine fine-grained behavioral information (>41,000 interactions) with molecular parentage data to study sexual selection in replicated, age-structured groups of polyandrous red junglefowl, Gallus gallus. Male reproductive success was determined by the number of females mated (precopulatory sexual selection) and his paternity share, which was driven by the polyandry of his female partners (postcopulatory sexual selection). Pre- and postcopulatory components of male reproductive success covaried positively; males with high mating success also had high paternity share. Two male phenotypes affected male pre- and postcopulatory performance: average aggressiveness toward rival males and age. Aggressive males mated with more females and more often with individual females, resulting in higher sexual exclusivity. Similarly, younger males mated with more females and more often with individual females, suffering less intense sperm competition than older males. Older males had a lower paternity share even allowing for their limited sexual exclusivity, indicating they may produce less competitive ejaculates. These results show thatin these populationspostcopulatory sexual selection reinforces precopulatory sexual selection, consistently promoting younger and more aggressive males.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据