Influence of weight asymmetry and kinship on siblicidal and cannibalistic behaviour in earwigs
Influence of weight asymmetry and kinship on siblicidal and cannibalistic behaviour in earwigs
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DOI：
10.1016/j.anbehav.2011.06.017
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发表时间：
2011-10-01
期刊：
影响因子：
2.5
通讯作者：
Koelliker, Mathias
中科院分区：
文献类型：
--
作者：
Dobler, Ralph;Koelliker, Mathias
在群居或社会性物种中，种内捕食和同类相食会导致包容性适合度的大幅下降，因为相关个体可能会遇到彼此。因此，选择的能力和准确性的亲属识别，以避免损失的包容性适应度。竞争和亲缘关系是导致同类相食和杀同胞行为发生的两个关键因素。然而，我们的知识的时间动态和亲属介导的同胞和同类相食的准确性是稀缺的，实验通常集中在相关性（亲属识别）或重量不对称性（优势和竞争）作为独立的组成部分。在一个实验中，我们成立了混合亲属组的三个月的欧洲earwig，Forficula auricularia Linnaeus，一个群居和（子）社会的物种，调查的综合影响的相关性和重量不对称的时间动态的siblicide和同类相食。我们发现，时间动力学的共同影响的相关性和权重不对称之间。体重不对称对同胞相残和同类相食的影响在无关个体之间比相关个体之间更强，这一点由显著的相关性 * 体重不对称对生存模式的相互作用所示。在相关和不相关个体之间进行选择的机会并没有提高亲属识别的准确性，但诱导了上述相关性和体重不对称性对同类相食结果的相互作用。这些结果表明，相关性和重量影响同胞和同类相食的行为，他们的综合效果取决于社会背景。(C)2011年，动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
In group-living or social species intraspecific predation and cannibalism can lead to substantial decreases in inclusive fitness because related individuals may encounter one another. Therefore, selection on the ability and accuracy of kin recognition to avoid losses in inclusive fitness is expected. Competition and relatedness are two key factors for the evolution of siblicide and cannibalism. However, our knowledge of the temporal dynamics and the accuracy of kin-mediated siblicide and cannibalism is scarce and experiments have usually focused on either relatedness (kin recognition) or weight asymmetry (dominance and competition) as independent components. In an experiment we set up mixed-kinship groups of three nymphs of the European earwig, Forficula auricularia Linnaeus, a gregarious and (sub-) social species, to investigate the combined effects of relatedness and weight asymmetry on the temporal dynamics of siblicide and cannibalism. We found that the temporal dynamics were jointly influenced by relatedness and weight asymmetry among nymphs. Weight asymmetry effects on siblicide and cannibalism were stronger between unrelated individuals than between related individuals as shown by a significant relatedness*weight asymmetry interaction on survival patterns. The opportunity to choose between related and unrelated individuals did not enhance the accuracy of kin recognition but induced the above interaction between relatedness and weight asymmetry on cannibalistic outcomes. These results show that relatedness and weight affect siblicidal and cannibalistic behaviour, and that their combined effect depends on the social context. (C) 2011 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.