Different or alike? Female rainbow kribs choose males of similar consistency and dissimilar level of boldness
Different or alike? Female rainbow kribs choose males of similar consistency and dissimilar level of boldness
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DOI：
10.1016/j.anbehav.2017.04.007
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发表时间：
2017-06
期刊：
影响因子：
2.5
通讯作者：
U. Scherer;M. Kuhnhardt;W. Schuett
中科院分区：
文献类型：
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作者：
U. Scherer;M. Kuhnhardt;W. Schuett
研究结果表明，男性和女性在大胆性方面表现出一致的个性差异。女性更喜欢与自己在大胆性水平上不同的男性。女性选择与自己在大胆性方面一致的男性。去除有偏向的偏好数据显著影响了我们的结果。尽管存在一致的个体间行为差异，虽然在过去十年中，关于动物行为的差异（“个性差异”）的研究已经得到了很好的证明，但这种行为限制的适应价值仍然是动物行为研究人员的一个开放领域。个性明显地限制了个体根据不同条件调整其行为的能力。然而，纯粹的灵活性成本无法解释人格差异所造成的多态性。在一个相关的方法，我们在这里测试是否配偶选择可能作为一个主要的驱动力，维持一夫一妻制，双亲彩虹krib，Pelvicachromis pulcher的个性变异。我们个性类型的所有男性和女性的大胆（活动下模拟捕食风险），并允许女性选择两个男性之间的不同，在他们的大胆（行为水平和一致性）。在选择之前，雌性被允许观察两个雄性，表达她们对视频动画自然捕食者的自然大胆。在短期和长期内，两性都表现出大胆的个性差异。此外，当删除侧偏的女性，我们发现一个dispersionative交配偏好的行为水平和行为的一致性，大胆的一个dispersionative偏好。这些偏好模式可能有助于在后代护理和/或提供遗传益处期间有效的父母角色分配。我们的研究结果表明，性选择在人格差异的进化中起着重要作用。
HighlightsMales and females showed consistent personality differences in boldness.Females preferred males that were dissimilar to themselves in the level of boldness.Females chose males assortatively for consistency in boldness.The removal of side-biased preference data significantly affected our results.Although the existence of consistent between-individual differences in behaviour (‘personality differences’) has been well documented during the last decade, the adaptive value of such behavioural limitations remains an open field for researchers of animal behaviour. Personalities clearly restrict individuals in their ability to adjust their behaviour to different conditions. However, sheer costs of flexibility cannot explain the polymorphism created by personality variation. In a correlative approach, we here tested whether mate choice might act as a major driving force maintaining personality variation in the monogamous, biparental rainbow krib, Pelvicachromis pulcher. We personality-typed all males and females for their boldness (activity under simulated predation risk) and allowed females to choose between two males that differed in their boldness (behavioural level and consistency). Prior to the choice, females were allowed to observe both males, expressing their natural boldness towards a video-animated natural predator. Both sexes showed personality differences in boldness over the short and long term. Furthermore, when removing side-biased females, we found a disassortative mating preference for the behavioural level and an assortative preference for behavioural consistency in boldness. These preference patterns might facilitate effective parental role allocation during offspring care and/or provide genetic benefits. Our results suggest that sexual selection plays an important role in the evolution of personality differences.