首页> 美国卫生研究院文献>Proceedings of the Royal Society B: Biological Sciences >Fighting for shells: how private information about resource value changes hermit crab pre-fight displays and escalated fight behaviour
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Fighting for shells: how private information about resource value changes hermit crab pre-fight displays and escalated fight behaviour

机译:争取炮弹:关于资源价值的私人信息如何改变寄居蟹的战斗前展示和激增的战斗行为

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摘要

Pre-fight displays typically provide honest, but sometimes dishonest, information about resource holding potential and may be influenced by assessment of resource value and hence motivation to acquire the resource. These assessments of potential costs and benefits are also predicted to influence escalated fight behaviour. This is examined in shell exchange contests of hermit crabs in which we establish an information asymmetry about a particularly poor quality shell. The poor shell was created by gluing sand to the interior whereas control shells lacked sand and the low value of the poor shell could not be accurately assessed by the opponent. Crabs in the poor shell showed changes in the use of pre-fight displays, apparently to increase the chances of swapping shells. When the fights escalated, crabs in poor shells fought harder if they took the role of attacker but gave up quickly if in the defender role. These tactics appear to be adaptive but do not result in a major shift in the roles taken or outcome. We thus link resource assessment with pre-fight displays, the roles taken, tactics used during escalation and the outcome of these contests.
机译:战斗前的显示通常会提供有关资源持有潜力的诚实但有时是不诚实的信息,并且可能会受到资源价值评估以及获取资源动机的影响。这些对潜在成本和收益的评估也预计会影响战斗行为的升级。在寄居蟹的贝壳交换竞赛中对此进行了检验,在竞赛中我们建立了关于质量特别差的贝壳的信息不对称性。劣质外壳是通过将沙子粘合到内部而产生的,而对照外壳缺少沙子,并且对手无法准确评估劣质外壳的低价值。壳质较差的螃蟹在使用战斗前显示器时发生了变化,显然增加了交换壳的机会。当战斗升级时,如果贝壳扮演攻击者的角色,则外壳较差的螃蟹会更加努力地战斗,但如果扮演防御者的角色,则会迅速放弃。这些策略似乎具有适应性,但不会导致所扮演的角色或结果发生重大变化。因此,我们将资源评估与战斗前的展示,所扮演的角色,升级期间使用的策略以及这些比赛的结果联系起来。

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