The Evolution of Indiscriminate Altruism in a Cooperatively Breeding Mammal
The Evolution of Indiscriminate Altruism in a Cooperatively Breeding Mammal
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DOI：
10.1086/703113
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发表时间：
2019-06-01
影响因子：
2.9
通讯作者：
Dyble, Mark
中科院分区：
文献类型：
--
作者：
Duncan, Chris;Gaynor, David;Dyble, Mark
亲属选择理论认为，当接受者是遗传亲属时，利他行为可以增加利他者的适应度。虽然选择可以使生物体优先与近亲合作，但如果群体内的相关性非常高，不加区别地帮助所有群体的配偶可能会产生相当的适应性回报。在这里，我们表明，猫鼬（Suricata suricatta）在很大程度上是不分青红皂白的利他主义者，他们不会改变提供给幼崽或群体伴侣的帮助量，以回应他们与他们的关系。我们提出了一个模型表明，不分青红皂白的利他主义可能会产生更大的健身比亲属歧视的回报，其中大多数群体成员是近亲和错误发生在估计的相关性。相关性估计中存在的错误为真社会性和合作繁殖动物中亲属歧视性帮助与群体相关性之间的关联提供了可行的解释。
Kin selection theory suggests that altruistic behaviors can increase the fitness of altruists when recipients are genetic relatives. Although selection can favor the ability of organisms to preferentially cooperate with close kin, indiscriminately helping all group mates may yield comparable fitness returns if relatedness within groups is very high. Here, we show that meerkats (Suricata suricatta) are largely indiscriminate altruists who do not alter the amount of help provided to pups or group mates in response to their relatedness to them. We present a model showing that indiscriminate altruism may yield greater fitness payoffs than kin discrimination where most group members are close relatives and errors occur in the estimation of relatedness. The presence of errors in the estimation of relatedness provides a feasible explanation for associations between kin discriminative helping and group relatedness in eusocial and cooperatively breeding animals.