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タイトル: Morphological Asymmetry of the Abdomen and Behavioral Laterality in Atyid Shrimps
著者: Takeuchi, Yuichi
Tobo, Shoko
Hori, Michio
著者名の別形: 竹内, 勇一
キーワード: abdominal curvature
antisymmetry
behavioral laterality
decapod
escape response
genetic basis
Neocaridina denticulata
morphological asymmetry
Limnocaridina latipes
tail-flip
発行日: Apr-2008
出版者: Zoological Society of Japan
誌名: Zoological Science
巻: 25
号: 4
開始ページ: 355
終了ページ: 363
抄録: Morphological asymmetry and behavioral laterality in vertebrate species have been intensively studied in recent years, while comparable invertebrate studies are rare. Here we demonstrate asymmetry in the curvature of the abdomen and laterality in evasive responses for two atyid shrimps, Limnocaridina latipes and Neocaridina denticulata. The frequency distributions of the angle of the abdominal curvature in both species were discretely bimodal, suggesting that the two populations are composed of both left- and right-type individuals. In N. denticulata, behavioral analysis using high-speed filming illustrated that the escape direction for each individual, evoked by a sudden non-lateralized stimulus, was correlated with its abdominal curvature: left- (right-) type shrimp jumped back-leftward (-rightward) significantly more than often. A crossing experiment with N. denticulata indicated that the trait frequency in the F1 generation from two left-type parents differed significantly from that of the F1 generation from two right-type parents, and that the trait frequency for the F1 generation from parents of different laterality types did not deviate from random. That is, offspring laterality type is affected by the lateralities of the parents, indicating that abdominal dimorphism in shrimp is genetically derived. These results suggest that shrimp have an innate laterality that controls their escape direction, which in turn may affect prey-predator interactions in the aquatic community.
著作権等: (c) 日本動物学会 / Zoological Society of Japan
URI: http://hdl.handle.net/2433/85314
DOI(出版社版): 10.2108/zsj.25.355
出現コレクション:Zoological Science

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