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首页> 外文期刊>Marine biology >Function of the major cheliped in male-male competition in the hermit crab Pagurus nigrofascia
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Function of the major cheliped in male-male competition in the hermit crab Pagurus nigrofascia

机译：大螯虾在寄居蟹Pagurus nigrofascia的雄雄竞争中的功能

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摘要

Functions of the major cheliped in pagurid hermit crabs have been studied in fights for shells. The major cheliped often shows sexual size dimorphism, suggesting that sexual selection favors the development of the male major cheliped. The function of the major cheliped in male-male competition was examined in Pagurus nigrofascia collected from April to June 2009 on the intertidal rocky shore in southern Hokkaido, Japan (41 °N, 140°E). Sexual size dimorphism of the major cheliped was observed, and precopulatory guarding males had larger major chelipeds than solitary ones. Guarding males used the major cheliped to deter intruders during competitive interactions. Males without a major cheliped were disad-vantaged even if they were larger than opponents and had ownership. Cheliped size affected the outcomes of contests between similar sized males. This suggests that the male major cheliped in P. nigrofascia protects mates from competitors and, consequently, enhances male mating success. Sexual selection may favor the development of the major cheliped in male pagurids.
机译：在争夺贝壳的过程中，已经研究了螯虾在隐居蟹中的主要功能。大螯虾通常表现出性别大小二态性，表明性别选择有利于大螯虾男性的发育。 2009年4月至2009年6月在日本北海道南部的潮间带多岩石海岸采集的Pagurus nigrofascia中检查了主要螯合物在雄性-雄性竞争中的功能（41°N，140°E）。观察到主要螯虾的性别大小二态性，并且交配前的守卫男性的主要螯虾比单独的较大。在竞争性互动中，守卫雄性使用大螯虾来阻止入侵者。没有大胖子的雄性即使比对手大且有主人翁，也处于不利地位。小胖的大小影响了类似大小男性之间的比赛结果。这表明，在黑黑胫病菌中螯合的雄性大雄可以保护配偶免受竞争者的侵害，从而增强雄性交配的成功率。性选择可能有利于雄性pagurids主要螯虾的发育。

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  • 来源
    《Marine biology》 |2011年第10期|p.2327-2334|共8页
  • 作者

    Chiaki Yasuda; Yutaro Suzuki; Satoshi Wada;

  • 作者单位

    Laboratory of Marine Biology,Graduate School of Fisheries Science,Hokkaido University, Minato-cho,Hakodate, Hokkaido 041-8611, Japan;

    Laboratory of Marine Biology,Graduate School of Fisheries Science,Hokkaido University, Minato-cho,Hakodate, Hokkaido 041-8611, Japan;

    Laboratory of Marine Biology,Graduate School of Fisheries Science,Hokkaido University, Minato-cho,Hakodate, Hokkaido 041-8611, Japan;

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