Relationship between Sex Ratio and Flight Activity in Two Related Butterflies, Pieris rapae crucivora and P. napi nesis (Lepidoptera, Pieridae)

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概要

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• The sex ratio at the place of emergence was surveyed for two congeneric butterflies, Pieris rapae crucivora and P. napi nesis by the belt transect census. Although the sex ratio at emergence was 1 : 1 in both species, the ratio obtained by the survey was male-biased in both species ; much higher in P. rapae, and changed seasonally, especially in P. rapae. The interspecific difference is probably caused by the difference in mate refusal behaviors of females ; P. rapae adopts both ascending flight and abdomen erecting behavior, while P. napi only the latter. This probably causes earlier emigration of young females from the emergence site and consequent male-biasedness there in P. rapae.

• 1983-12-25

著者

• Yamamoto Michiya

  Faculty Of Economics Ryutsu-keizai University

関連論文

• Relationship between Sex Ratio and Flight Activity in Two Related Butterflies, Pieris rapae crucivora and P. napi nesis (Lepidoptera, Pieridae)
• Flight Activity Pattern of the Japanese Cabbage White, Pieris rapae crucivora (Lepidoptera, Pieridae)
• Gaze Estimation Method Involving Corneal Reflection-Based Modeling of the Eye as a General Surface of Revolution about the Optical Axis of the Eye

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