Morphological asymmetry and behavioral laterality in the crayfish, Procambarus clarkii

Shoko Tobo; Yuichi Takeuchi; Michio Hori

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Morphological asymmetry and behavioral laterality in the crayfish, Procambarus clarkii

机译：小龙虾克氏原螯虾的形态学不对称性和行为偏向性

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摘要

Lateral asymmetry is found widely among vertebrates, but is scarcely observed in invertebrates. Here, morphological asymmetry and behavioral laterality of a wild crayfish, Procambarus clarkii, was investigated. The carapace morphology of crayfish showed left-right differences; in some, the right side of the carapace was larger than the left side, while in others, the left side was larger. A bimodal distribution in the direction of escape behaviors induced by a tactile stimulus was also observed. Experimental crayfish were definitively divided into two groups: individuals that frequently jumped leftward (right type) and those that jumped rightward (left type). Moreover, carapace asymmetry and lateralized escape responses were significantly correlated. These results suggest that crayfish exhibit left-right dimorphism in natural populations. The ecological advantages and maintenance mechanisms underlying these behaviors are also discussed.

机译：横向不对称在脊椎动物中广泛发现，但在无脊椎动物中很少观察到。在这里，对野生小龙虾Procambarus clarkii的形态不对称和行为偏向进行了研究。小龙虾的甲壳形态表现出左右差异。在某些情况下，甲壳的右侧大于左侧，而在另一些情况下，左侧则较大。还观察到由触觉刺激引起的逃逸行为方向上的双峰分布。实验性小龙虾被明确地分为两组：经常向左跳的个体（右型）和向右跳的个体（左型）。此外，甲壳的不对称性和侧向逃避反应显着相关。这些结果表明，小龙虾在自然种群中表现出左右二态性。还讨论了这些行为的生态优势和维持机制。

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来源
《Ecological research》 |2012年第1期|p.53-59|共7页
作者
Shoko Tobo; Yuichi Takeuchi; Michio Hori;
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作者单位

Laboratory of Animal Ecology, Division of Biological Science, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan;

Department of Biological Science, Graduated School of Science, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8602, Japan;

Laboratory of Animal Ecology, Division of Biological Science, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan;

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正文语种 eng
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关键词
laterality; escape behavior; crustacean; morphological asymmetry;

机译：横向性逃避行为;甲壳类形态不对称;

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Morphological asymmetry and behavioral laterality in the crayfish, Procambarus clarkii

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