Handedness of Macromedaeus distinguendus and Leptodius exaratus (Brachyura: Xanthidae)

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  • シワオオギガニとオオギガニのはさみ脚の不相称
  • シワオオギガニとオオギガニのはさみ脚の不相称〔英文〕
  • シワオオギガニ ト オオギガニ ノ ハサミ アシ ノ フ ソウショウ エイブ

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Abstract

A total of 12,129 specimens of Macromedaeus distinguendus were examined for handedness. The percentage of left-handed crabs was 21.5 % in males and 20.8 % in females. No significant increase in the ratio of left-handed crabs by size was confirmed. Examination of a total of 4,453 specimens of Leptodius exaratus showed that the species has an equal ratio with regard to handedness.

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