Kin discrimination and the benefit of helping in cooperatively breeding vertebrates
Kin discrimination and the benefit of helping in cooperatively breeding vertebrates
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DOI：
10.1126/science.1089402
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发表时间：
2003-10-24
期刊：
影响因子：
56.9
通讯作者：
West, SA
中科院分区：
文献类型：
--
作者：
Griffin, AS;West, SA
在许多合作繁殖的脊椎动物中，优势繁殖对由非繁殖帮助者协助照顾后代。对这种利他行为的一个主要解释是汉密尔顿的观点，即帮助者通过抚养亲属（亲属选择）获得间接的适应性利益。许多研究表明，帮助者通常会照顾亲属，但相对较少的研究表明，帮助者会为更亲密的亲属提供优先照顾（亲缘歧视），这进一步证明了亲缘选择在脊椎动物合作繁殖的进化中只占很低的比例。我们使用荟萃分析来显示(i)个体在亲缘关系之间始终存在歧视；（ii）在帮助他人的好处更大的物种中，歧视更强烈。这些结果表明亲缘选择的作用是普遍的，亲缘选择的相对重要性在不同物种之间是不同的，正如汉密尔顿法则所预测的那样。
In many cooperatively breeding vertebrates, a dominant breeding pair is assisted in offspring care by nonbreeding helpers. A leading explanation for this altruistic behavior is Hamilton's idea that helpers gain indirect fitness benefits by rearing relatives (kin selection). Many studies have shown that helpers typically provide care for relatives, but relatively few have shown that helpers provide closer kin with preferential care ( kin discrimination), fueling the suggestion that kin selection only poorly accounts for the evolution of cooperative breeding in vertebrates. We used meta-analysis to show that (i) individuals consistently discriminate between kin, and (ii) stronger discrimination occurs in species where the benefits of helping are greater. These results suggest a general role for kin selection and that the relative importance of kin selection varies across species, as predicted by Hamilton's rule.