Male age is associated with extra-pair paternity, but not with extra-pair mating behaviour.
Male age is associated with extra-pair paternity, but not with extra-pair mating behaviour.
复制标题
DOI：
10.1038/s41598-018-26649-1
复制
发表时间：
2018-05-30
影响因子：
4.6
通讯作者：
Schroeder J
中科院分区：
文献类型：
--
作者：
Girndt A;Chng CWT;Burke T;Schroeder J
配偶外父权是指雌性与其社会伴侣以外的雄性交配的结果。在社会性一夫一妻制的鸟类中，年老的雄性最有可能产生额外的后代。男性操纵和女性选择假说预测，特定年龄的男性交配行为可以解释这种老年男性的优势。这些假设很难验证，因为交配和所涉及的个体很难观察。在这里，我们研究了交配行为和配对环境的圈养家麻雀，麻雀。我们的设置模仿了野生家雀所经历的复杂社会环境。我们发现，中年男性，这将被认为是老年人在自然群体中，获得了最额外的对父子关系。然而，无论是，女性的恳求行为和随后的额外配对交配与男性年龄无关。此外，雌性主动交配比雄性主动交配更有可能（即主动交配）。男性发起内对交配比男性发起外对交配更常见。总之，我们的研究结果并不支持这两个假设特定年龄的男性交配行为。相反，女性的选择，独立于男性的年龄，支配交配成功，特别是在一个额外的对上下文。交配后的机制可能决定了为什么年长的雄性会产生更多的额外后代。
Extra-pair paternity is the result of copulation between a female and a male other than her social partner. In socially monogamous birds, old males are most likely to sire extra-pair offspring. The male manipulation and female choice hypotheses predict that age-specific male mating behaviour could explain this old-over-young male advantage. These hypotheses have been difficult to test because copulations and the individuals involved are hard to observe. Here, we studied the mating behaviour and pairing contexts of captive house sparrows, Passer domesticus. Our set-up mimicked the complex social environment experienced by wild house sparrows. We found that middle-aged males, which would be considered old in natural populations, gained most extra-pair paternity. However, both, female solicitation behaviour and subsequent extra-pair matings were not associated with male age. Further, copulations were more likely when solicited by females than when initiated by males (i.e. unsolicited copulations). Male initiated within-pair copulations were more common than male initiated extra-pair copulations. To conclude, our results did not support either hypothesis regarding age-specific male mating behaviour. Instead, female choice, independent of male age, governed copulation success, especially in an extra-pair context. Post-copulatory mechanisms might determine why older males sire more extra-pair offspring.
登录
查看更多内容
影响因子：
9.8
作者：
Ihle M;Kempenaers B;Forstmeier W
通讯作者：
Forstmeier W
影响因子：
2.1
作者：
Cleasby, Ian R.;Nakagawa, Shinichi
通讯作者：
Nakagawa, Shinichi
影响因子：
7.7
作者：
Dawson, Deborah A.;Horsburgh, Gavin J.;Burke, Terry
通讯作者：
Burke, Terry
影响因子：
1.7
作者：
Briskie, JV;Montgomerie, R
通讯作者：
Montgomerie, R
影响因子：
2.3
作者：
Dickinson, JL
通讯作者：
Dickinson, JL