Ejaculation Timing of Eupyrene and Apyrene Sperm in the Cabbage White Butterfly Pieris rapae (Lepidoptera : Pieridae) during Copulation

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概要

• 論文の詳細を見る

• During copulation, the male small white, Pieris rapae, fills a single spermatophore in the bursa copulatrix of the female. Artificial interruption of copulation showed that the male filled first white gel after which the spermatophore was structured. No sperm were found in the gel. Both eupyrene sperm bundles and free apyrene sperm were ejaculated into the structured spermatophore immediately before the completion of copulation. A male transferred about 11, 000 eupyrene sperm, whereas about 46, 000 apyrene sperm were found in a complete spermatophore just after copulation. The sperm density in the spermatophore also indicated that the velocity of transferring both eupyrene and apyrene sperm increased torward the end of copulation. The significance of timing in sperm ejaculation is discussed from a view point of sperm competition.

• 日本昆虫学会の論文
• 1998-03-25

著者

• Watanabe Mamoru

  Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima Uni

• Bonno Minetaka

  Department Of Biology Faculty Of Education Mie University

• WIKLUND Christer

  Department of Zoology, Stockholm University

• Wiklund Christer

  Department Of Zoology Stockholm University

• Watanabe Mamoru

  Department Of Applied Mathematics Okayama University Of Science

• Bon′no Minetaka

  Department of Biology, Faculty of Education, Mie University

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