Does prior residency interact with loss? A study of male?male contests in the hermit crab Pagurus minutus
Does prior residency interact with loss? A study of male?male contests in the hermit crab Pagurus minutus
复制标题
以前的居住权与损失有相互作用吗？
DOI：
10.1111/eth.13018
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发表时间：
2020
期刊：
影响因子：
1.7
通讯作者：
Koga Tsunenori
中科院分区：
文献类型：
--
作者：
Yasuda Chiaki I.;Kaida Takehiro;Koga Tsunenori
在所有权不对称的竞争中，居住权是成功的重要预测因素。居住往往可以与一个成功的经验。然而，考虑到一些居民即使在显示所有权优势时也会输掉比赛，并且导致损失的过程往往决定了失败者随后的成功，先前的所有权也可能与损失相互作用。在这里，我们用类似大小的武器（即，在这个物种中，雄性与雄性之间的竞争发生在一个单独的入侵者和一个保护一个成熟雌性的主人之间。我们评估了（a）资源所有权和女性价值是否影响比赛结果，以及（B）失败后获胜的概率是否取决于失败者的初始角色（即， 所有者或入侵者）通过使用pre-pulatory守卫对P。minutuscollected收集from the field领域.在第一次战斗试验中，我们发现了一个所有权优势，并增加业主的成功，因为他的合作伙伴的身体大小增加。虽然一些业主失去了战斗，与我们的预测相反，在第二次战斗试验中失败的频率在以前的业主和以前的入侵者之间没有区别。由于在第一次雄性-雄性竞争的战斗试验中，失败者没有女性，无论他们最初的角色如何，这种共同的孤独状态可能与第二次战斗试验中成功的差异缺乏有关。此外，与其他动物不同的是，居住状态并不总是确保P具有更强的战斗能力。因为守卫Pagurus的雄性可以通过爬上田野里的物体来避免雄性之间的竞争。因此，在第一次试验中，失败者可能是较弱的竞争者，而不是基于大小的特征，无论他们是主人还是入侵者。
Residency is an important predictor of success in contests with ownership asymmetries. Residency often can interact with a winning experience. However, given that some residents lose a contest even when showing an ownership advantage and that the process leading to loss often determines the loser's subsequent success, prior ownership might also interact with a loss. Here, we staged experimental contests between males of the hermit crabPagurus minutuswith a similar‐sized weapon (i.e., cheliped) to examine this possibility.Male–male contests in this species occur between a solitary intruder and an owner guarding a mature female. We evaluated (a) whether resource ownership and female value affect the contest outcome and (b) whether the probability of winning after losing differs depending on the initial role of the loser (i.e., owner or intruder) by using precopulatory guarding pairs ofP. minutuscollected from the field. In the first fighting trial, we found an ownership advantage and increasing owner success as the body size of his partner increased. Although some owners lost the fight, in contrast to our prediction, the frequency of losing in the second fighting trial did not differ between prior owners and prior intruders. Because losers from the first fighting trial of male–male contests have no female regardless of their initial role, this shared solitary status might be related to the lack of difference in success in the second fighting trial. Moreover, unlike in other animals, resident status might not always assure greater fighting ability inP. minutusmales because guardingPagurusmales can avoid male–male contests by climbing up objects in the field. Losers in the first trial, therefore, may have been weaker contestants based on traits other than size, regardless of whether they were owners or intruders.