Heterogeneity in resource competition covaries with individual variation in long-term social relationships
Heterogeneity in resource competition covaries with individual variation in long-term social relationships
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DOI：
10.1093/beheco/arac037
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发表时间：
2022-05-09
影响因子：
2.4
通讯作者：
Frere，Celine H.
中科院分区：
文献类型：
--
作者：
Levengood，Alexis L.;Strickland，Kasha;Frere，Celine H.
同种物种之间的资源竞争是社会进化的核心，因为它是群体生活的主要选择压力之一。这是因为对资源的竞争程度会影响社会互动的成本和收益。尽管如此，资源竞争的异质性如何驱动个体培养的长期社会关系的类型和数量的变化一直被忽视。通过测量男性交配竞争和女性觅食竞争在一个高度社会化，长寿的哺乳动物，我们表明，在长期的性内社会关系的个体差异协变与首选的栖息地和经验丰富的资源竞争，这种影响不同的性别的个人。具体而言，更大的资源竞争导致较少的社会偏好，但不同的栖息地和性别的影响的大小，而社会回避，无论是方向性和规模的资源竞争的影响不同的栖息地和性别。我们的工作共同显示了个体社会生态位（即，独特的物理和社会环境）可以驱动人口中个体社会行为（这里是长期关系）的广泛变化，从而拓宽了当前的社会进化理论。
Resource competition among conspecifics is central to social evolution, as it serves as one of the primary selective pressures of group living. This is because the degree of competition for resources impacts the costs and benefits of social interactions. Despite this, how heterogeneity in resource competition drives variation in the type and quantity of long-term social relationships individuals foster has been overlooked. By measuring male mating competition and female foraging competition in a highly social, long-lived mammal, we demonstrate that individual variation in long-term intrasexual social relationships covaries with preferred habitat and experienced resource competition, and this effect differs based on the sex of the individual. Specifically, greater resource competition resulted in fewer social preferences, but the magnitude of the effect varied by both habitat and sex, whereas for social avoidances, both the directionality and magnitude of the effect of resource competition varied by habitat and sex. Together our work shows how fine-scale variation in individual socioecological niches (i.e., unique physical and social environments) can drive extensive variation in individual social behavior (here long-term relationships) within a population, thereby broadening current theories of social evolution.