Patterns and consequences of age-linked change in local relatedness in animal societies.

Patterns and consequences of age-linked change in local relatedness in animal societies.
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DOI:
10.1038/s41559-022-01872-2
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发表时间:
2022-11
影响因子:
16.8
通讯作者:
--
中科院分区:
生物学1区
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行为的最终回报不仅取决于其对个人的直接影响,还取决于对其亲属的影响。因此,当地相关性——个人与其社会环境的平均相关性——对社会和生活史的演变有着深远的影响。最近的研究已经开始表明,局部关联性有可能在个人的一生中系统性地发生变化,这一过程称为亲属动态。然而,目前尚不清楚这些亲属关系动态有多普遍,它们在真实系统中是否可预测以及它们对行为和生活史进化的影响。在这项研究中,我们将建模与真实系统的数据相结合,探索亲属关系动态的范围和影响。我们使用来自七种具有不同社会和交配系统的群居哺乳动物的数据,不仅证明动物系统中存在亲缘动态,而且可以使用简单的模型准确预测亲缘动态的方向和幅度。我们使用理论模型来证明,亲属关系动态可以深刻影响一生的行为模式,并且可以驱动社会物种在整个生命周期中帮助和伤害行为的性别差异。总的来说,这项工作表明,亲属关系动态可能是社会进化的一个基本维度,特别是在考虑与年龄相关的变化以及行为和生活史中的性别差异时。
The ultimate payoff of behaviours depends not only on their direct impact on an individual but also on the impact on their relatives. Local relatedness – the average relatedness of an individual to their social environment – therefore has profound impacts on social and life history evolution. Recent work has begun to show that local relatedness has the potential to change systematically over an individual’s lifetime, a process called kinship dynamics. However, it is unclear how general these kinship dynamics are, whether they are predictable in real systems and their impacts on behaviour and life history evolution. In this study, we combine modelling with data from real systems to explore the extent and impact of kinship dynamics. We use data from seven group-living mammals with diverse social and mating systems to demonstrate not only that kinship dynamics occur in animal systems, but also that the direction and magnitude of kinship dynamics can be accurately predicted using a simple model. We use a theoretical model to demonstrate that kinship dynamics can profoundly impact lifetime patterns of behaviour and can drive sex differences in helping and harming behaviour across the lifespan in social species. Taken together this work demonstrates that kinship dynamics are likely to be a fundamental dimension of social evolution, especially when considering age-linked changes and sex differences in behaviour and life history.
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