Genetic relatedness in two-tiered plains zebra societies suggests that females choose to associate with kin
Genetic relatedness in two-tiered plains zebra societies suggests that females choose to associate with kin
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DOI：
10.1163/1568539x-00003314
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发表时间：
2015
期刊：
影响因子：
1.3
通讯作者：
Wenfei Tong;B. Shapiro;D. Rubenstein
中科院分区：
文献类型：
--
作者：
Wenfei Tong;B. Shapiro;D. Rubenstein
亲属关系结构如何改变群体成员的包容性健身效益或竞争成本可以解释动物社会的差异。我们提供了结合行为关联和遗传相关性的罕见数据，以确定性别差异和亲属关系对构建两层斑马社会的影响。我们发现行为关联的强度和相关性之间存在显着的正相关关系。群体内的雌性相关性高于偶然性，这表明雌性亲属驱动群体形成，并且与哺乳期雌性优先分组以降低捕食风险的证据一致。相比之下，牛群中后宫之间的雄性相关性与牛群之间的相关性没有什么不同，这表明尽管种马受益于联合来抵御单身汉，但它们并不优先形成亲属联盟。尽管雌性和雌性都会分散，但我们发现大多数后宫都包含成年亲属，这意味着雌性分散距离有限，并且该种群中存在近亲繁殖，从而产生潜在的保护后果。
How kinship structures alter inclusive fitness benefits or competition costs to members of a group can explain variation in animal societies. We present rare data combining behavioural associations and genetic relatedness to determine the influence of sex differences and kinship in structuring a two-tiered zebra society. We found a significantly positive relationship between the strength of behavioural association and relatedness. Female relatedness within herds was higher than chance, suggesting that female kin drive herd formation, and consistent with evidence that lactating females preferentially group into herds to dilute predation risk. In contrast, male relatedness across harems in a herd was no different from relatedness across herds, suggesting that although stallions benefit from associating to fend off bachelors, they do not preferentially form kin coalitions. Although both sexes disperse, we found that most harems contained adult relatives, implying limited female dispersal distances and inbreeding in this population, with potential conservation consequences.