Contrasts in kinship structure in mammalian societies
Contrasts in kinship structure in mammalian societies
复制标题
哺乳动物社会中亲属关系结构的差异
DOI：
10.1093/beheco/araa043
复制
发表时间：
2020-07-01
影响因子：
2.4
通讯作者：
Clutton-Brock, Tim H.
中科院分区：
文献类型：
--
作者：
Dyble, Mark;Clutton-Brock, Tim H.
对哺乳动物的比较研究证实了汉密尔顿的预测，即不同物种之间合作和竞争行为的差异将与群体成员之间亲属关系的差异有关。虽然理论模型已经探讨了社会群体内部亲属关系的影响因素，但很少有理论模型分析亲缘关系在亲缘关系物种之间差异的原因。在这里，我们描述了群居哺乳动物群体成员之间的平均亲属关系的种间差异，并表明一个简单的数学模型，包括繁殖雌性的数量，雄性繁殖偏度和产仔数，成功地预测了在哺乳动物样本中观察到的群体成员之间平均亲属关系的95%的变化。我们的模型表明，广泛的条件可以产生具有低平均亲缘关系的群体，但只有一小部分相当特定的条件可能产生其成员之间高平均亲缘关系，这为哺乳动物社会中高级合作形式的相对罕见提供了见解。
Comparative studies of mammals confirm Hamilton's prediction that differences in cooperative and competitive behavior across species will be related to contrasts in kinship between group members. Although theoretical models have explored the factors affecting kinship within social groups, few have analyzed the causes of contrasts in kinship among related species. Here, we describe interspecific differences in average kinship between group members among social mammals and show that a simple mathematical model that includes the number of breeding females, male reproductive skew, and litter size successfully predicts similar to 95% of observed variation in average kinship between group members across a sample of mammals. Our model shows that a wide range of conditions can generate groups with low average relatedness but only a small and rather specific set of conditions are likely to generate high average levels of relatedness between their members, providing insight into the relative rarity of advanced forms of cooperation in mammalian societies.