Individual variation in social aggression and the probability of inheritance: Theory and a field test
Individual variation in social aggression and the probability of inheritance: Theory and a field test
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DOI：
10.1086/503445
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发表时间：
2006-06-01
影响因子：
2.9
通讯作者：
Field, Jeremy
中科院分区：
文献类型：
--
作者：
Cant, Michael A.;Llop, Justine B.;Field, Jeremy
最近的理论表明，存在于合作动物社会中的个体行为的广泛差异，很大程度上可以通过未来适应度的直接组成部分或遗传概率的变化来解释。在这里，我们开发了两个模型来探索未来健康水平的变化对社会攻击性的影响。这些模型预测，攻击性的比率将在等待继承的队列前面最高，而且在规模更大、生产力更高的群体中会更高。第三个预测是，在季节性动物中，随着继承繁殖地位的时间耗尽，攻击性将会增加。我们用一种社会物种的模型--纸黄蜂--来检验这些预测。我们发现，正如我们的模型所预测的那样，攻击性“展示”(针对较低等级的个体)和攻击性“测试”(针对较高等级的个体)的比率都在向下降低。影响攻击率的唯一另一个重要因素是日期，正如预测的那样，在本赛季晚些时候观察到更多的攻击性。遗传等级导致未来适合度的变化是该物种中表面上等同的个体之间攻击性差异的主要隐藏因素。
Recent theory suggests that much of the wide variation in individual behavior that exists within cooperative animal societies can be explained by variation in the future direct component of fitness, or the probability of inheritance. Here we develop two models to explore the effect of variation in future fitness on social aggression. The models predict that rates of aggression will be highest toward the front of the queue to inherit and will be higher in larger, more productive groups. A third prediction is that, in seasonal animals, aggression will increase as the time available to inherit the breeding position runs out. We tested these predictions using a model social species, the paper wasp Polistes dominulus. We found that rates of both aggressive "displays" ( aimed at individuals of lower rank) and aggressive "tests" ( aimed at individuals of higher rank) decreased down the hierarchy, as predicted by our models. The only other significant factor affecting aggression rates was date, with more aggression observed later in the season, also as predicted. Variation in future fitness due to inheritance rank is the hidden factor accounting for much of the variation in aggressiveness among apparently equivalent individuals in this species.