Semi-lunar spawning cycle and mating tactics in the marine goby <Emphasis Type="Italic">Asterropteryx semipunctata</Emphasis> |
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Authors: | Hisaya Manabe Kazutaka Hagiwara Akemi Yonemori Keiichi Fujiwara Akihiko Shinomiya |
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Institution: | (1) 1089-202 Hirakawa-cho, Kagoshima 891-0133, Japan;(2) Faculty of Fisheries, Kagoshima University, Kagoshima 890-0056, Japan;(3) Present address: Education Center, Kagoshima University, 1-21-30 Korimoto, Kagoshima 890-0065, Japan |
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Abstract: | The reproductive behaviors of the marine goby Asterropteryx semipunctata were studied at Sakurajima, Kagoshima, Japan. Spawning occurred from late June to early October with a peak at 3–4 days after
the full and new moon. This semi-lunar cycle might be advantageous to reducing nest-egg mortality but may not to larvae dispersion.
Large males maintained spawning nests, and females spawned a whole clutch at a nest but with multiple males during a season.
Females were less likely to be choosy due probably to a predation risk and/or nesting male shortage. Smaller males adopted
sneaking tactics, and some of them became nesting males. |
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Keywords: | Gobiidae Semi-lunar cycle Reproductive behaviors Alternative mating tactic Polygamy |
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