Titlebook: Sperm Competition in Butterflies; Mamoru Watanabe Book 2016 Springer Japan 2016 Apyrene sperm.Eupyrene sperm.Spermatophore.Sperm migration

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Historical Perspective,o mate more than once. A plug secreted by males of some species during copulation seemed to prevent further mating of females, supporting such female monogamy. Mate refusal postures of mated females when encountered by males also suggested maintaining female monogamy. Consequently, virgin females ar

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Reproductive Anatomy,oa. The apyrene spermatozoon, however, has no nucleus and does not have fertilisation ability. After copulation, both types of spermatozoa move out of the bursa copulatrix, and then arrive at the spermatheca to be stored until oviposition. The spermatheca does not enlarge relative to the stored sper

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Mating Conflict,ularly mated males. Because the nutrients derived from the host plants could produce less than a half spermatophore at the subsequent mating, mated males have to resort exclusively to nectar during a certain period after mating to produce a full-sized spermatophore for the next mating. Because monog

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Avoidance of Sperm Competition in Males,ted females must be high. Therefore, males might have to develop not a morphological but a behavioural or physiological device to avoid or to win the sperm competition. Sperm migration inside the female reproductive organs after copulation suggests that apyrene sperm may intercept the movement of th

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Sperm Manipulation in Females, as absorption of apyrene sperm. In addition to the adaptive oviposition process for suitable host plants, sexual selection must occur. Females could prefer the sperm of males that increase fitness of the females, for example, males that produce large spermatophores. When the signals for good males

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2191-0707 ng of sexual selection across animal species with sperm polymorphism. This book, describing the evolutionary causes and consequences of the sperm competition in butterflies, is a recommended read for students of behavioural ecology..978-4-431-56733-2978-4-431-55945-0Series ISSN 2191-0707 Series E-ISSN 2191-0715