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首页> 外文期刊>Ethology >Male Success in Intrasexual Contests Extends to the Level of Sperm Competition in a Species of Dung Roller Beetle
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Male Success in Intrasexual Contests Extends to the Level of Sperm Competition in a Species of Dung Roller Beetle

机译：男性在异性恋竞赛中的成功扩展到某种粪便Roll虫的精子竞争水平

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摘要

Contests between males fighting over limited resources often determine the reproductive success of the contestants. It is possible that the outcomes of such contests are affected by traits that also contribute to the likelihood of males achieving paternity when sperm from multiple males compete to fertilize the ova of a single female; however, this relationship has been poorly characterized. In dung and carrion roller beetles, contests among males for the possession of a food ball - a vital resource for nesting - are frequent in nature. However, females that roll and nest with a male often store the sperm of previous mates, forcing males to engage in sperm competition. We analyzed the relationship between wins and losses in contests between food ball owner males and subsequent paternity success in the carrion roller beetle Canthon cyanellus using both naive (virgin) and experienced (previously mated) males. Owner males that initiated contests were more likely to win, and contest durations were longer between experienced owner males than between naive owners. The paternity of the winner owner males nesting with a female that had previously mated with another male was higher than for loser owner males, and the paternity of experienced owners also tended to be higher than for virgin owners. Our results indicate that winning and being an experienced male are associated with greater success at fighting and sperm competition than losing and being a naive male.
机译：争夺有限资源的雄性之间的竞赛通常决定了参赛者的生殖成功。当多个男性的精子竞争为一个女性的卵子受精时，这些竞赛的结果可能会受到性状的影响，这些性状也有助于男性获得父权。但是，这种关系的特征很差。在粪便和腐肉轮虫中，自然界中男性之间经常争夺食物球（巢的重要资源）的所有权。但是，与雄性一起滚动和筑巢的雌性通常会储存以前伴侣的精子，从而迫使雄性进行精子竞争。我们使用幼稚（原始）和有经验（先前交配）的雄性动物，分析了食球所有者雄性动物在比赛中的获胜与损失以及随后在腐肉食虫甲虫Canthon cyanellus中取得亲子关系的成功之间的关系。发起比赛的业主男性更有可能获胜，经验丰富的业主男性之间的比赛时间比天真的业主之间的比赛时间更长。获胜者拥有者的雄性与先前与另一雄性交配过的雌性筑巢，比失败者拥有者的雄性高，有经验的拥有者的亲子性也往往高于原始拥有者。我们的结果表明，赢得和成为有经验的男性与在战斗和精子竞争中取得更大的成功比失去和成为幼稚的男性更为相关。

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