Weak rappers rock more: hermit crabs assess their own agonistic behaviour
Weak rappers rock more: hermit crabs assess their own agonistic behaviour
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弱说唱歌手更摇滚：寄居蟹评估自己的竞争行为
作者：
E. Edmonds;M. Briffa
战斗动物利用各种信息源来做出战略决策。一个被忽视的潜在信息来源是个人在战斗中的表现。令人惊讶的是，这种可能性尚未被纳入有关攻击行为进化的大量理论中。在这里，通过实验抑制寄居蟹敲击壳行为的影响，我们测试了攻击寄居蟹监控自身战斗表现的可能性。敲击次数减少的攻击者并未表现出敲击次数的减少。相比之下，它们表现出较不强烈的竞争行为（贝壳摇摆）的频率增加。被迫用弱说唱的攻击者的这种行为变化表明他们评估了自己的竞争行为。
Fighting animals use a variety of information sources to make strategic decisions. A neglected potential source of information is an individual's own performance during a fight. Surprisingly, this possibility has yet to be incorporated into the large body of theory concerning the evolution of aggressive behaviour. Here, by experimentally dampening the impact of their shell rapping behaviour, we test for the possibility that attacking hermit crabs monitor their own fight performance. Attackers with dampened raps did not show a reduction in the number of raps used. By contrast, they showed an increased frequency of a less intense agonistic behaviour, shell rocking. This change in behaviour, in attackers that are forced to rap weakly, indicates that they assess their own agonistic behaviour.