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首页> 美国卫生研究院文献>other >Predictability is attractive: Female preference for behaviourally consistent males but no preference for the level of male aggression in a bi-parental cichlid
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Predictability is attractive: Female preference for behaviourally consistent males but no preference for the level of male aggression in a bi-parental cichlid

机译：可预测性很吸引人：女性偏爱行为一致的男性但不偏爱双亲丽鱼科鱼的男性攻击程度

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Although personality traits can largely affect individual fitness we know little about the evolutionary forces generating and maintaining personality variation. Here, we investigated the hypothesis that personality variation in aggression is sexually selected in the monogamous, bi-parental cichlid Pelvicachromis pulcher. In this species, breeding pairs form territories and they aggressively defend their territory and offspring against con- and heterospecific intruders. In our mate choice study, we followed up two alternative hypotheses. We either expected females to show a directional preference for a high level and high consistency of aggression (potentially indicating mate choice for male parental quality). Alternatively, we expected females to choose males for (dis-)similarity in the level/consistency of aggression (potentially indicating mate choice for compatibility). Individual level and consistency of aggression were assessed for males and females using mirror tests. After eavesdropping on aggressive behaviour of two males (differing in level and consistency of aggression) females were then allowed to choose between the two males. Males, but not females, showed personality variation in aggression. Further, females generally preferred consistent over inconsistent males independent of their level of aggression. We did not detect a general preference for the level of male aggression. However, we found an above average preference for consistent high-aggression males; whereas female preference for inconsistent high-aggression did not deviate from random choice. Our results suggest behavioural consistency of aggression in male rainbow kribs is selected for via female mate choice. Further, our study underlines the importance of considering both the level and the consistency of a behavioural trait in studies of animal behaviour.
机译：尽管人格特质在很大程度上影响个人适应性，但我们对产生和维持人格变异的进化力知之甚少。在这里，我们调查了这样的假说，即在一夫一妻制，双亲丽鱼科鱼类丽鱼卵中有性地选择了侵略性的性格变异。在这个物种中，繁殖对形成领土，它们积极防御自己的领土和后代免受同种和异种入侵者的侵害。在我们的伴侣选择研究中，我们遵循了两个备选假设。我们或者期望女性表现出对高水平和高一致性的攻击性的方向性偏好（可能表明男性对父母育儿质量的选择）。另外，我们希望雌性会选择雄性，因为它们在侵略程度/一致性上（不相似）（可能表明出于兼容性选择伴侣）。使用镜像测试评估男性和女性的个人攻击水平和一致性。在窃听了两名雄性的攻击行为（攻击水平和一致性有所不同）之后，然后允许雌性在这两名雄性之间进行选择。男性而不是女性表现出攻击性格方面的差异。此外，与男性的攻击程度无关，女性通常更喜欢一致而不是不一致的男性。我们没有发现普遍偏爱男性侵略水平。但是，我们发现，对于一贯的高侵略性男性，偏爱高于平均水平；而女性对于不一致的高侵略性的偏爱并没有偏离随机选择。我们的结果表明，通过女性伴侣的选择可以选择男性彩虹童床中侵略行为的行为一致性。此外，我们的研究强调了在动物行为研究中同时考虑行为特征的水平和一致性的重要性。

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