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シマギンポにおける雌の配偶者選択と雄の性的形質発現に与える雄性ホルモンの影響


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タイトル: シマギンポにおける雌の配偶者選択と雄の性的形質発現に与える雄性ホルモンの影響
その他のタイトル: Female mate choice and the effects of androgen levels on the expression of male sexual traits in the combtooth blenny Salarias luctuosus (Pisces: Blenniidae)
著者: 井手, 勇旗 / 松本, 有記雄 / 竹垣, 毅
著者(別表記) : Ide, Yuki / Matsumoto, Yukio / Takegaki, Takeshi
発行日: 2016年 3月
出版者: 長崎大学水産学部 / The Faculty of Fisheries, Nagasaki University
引用: 長崎大学水産学部研究報告, 97, pp.19-24; 2016
抄録: Effects of male courtship behavior and male sexual traits on female mate choice in a combtooth blenny Salarias luctuosus were investigated in the intertidal zone at Mie coast, Nagasaki, Japan. Females entered into the nests occupied by males with vigorous courtship displays, but they sometimes came out of the nests without spawning. The females that had entered the nests spawned there when larger males occupied the nests. As known in many animals, larger males might have a higher quality of parental care of eggs. On the other hand, the male head crest size and orange spot size did not have any influence on the female mate choice. In addition, the female preference for the males tending eggs in the nests was not confirmed in this study. In this study, factors influencing expressions of male courtship behavior and sexual dimorphism were also investigated. The time spent for male courtship behavior was not affected by available spawning space in the nests or male body condition, but was positively correlated with plasma levels of 11-ketotestosterone (11-KT). Moreover, a positive correlation between 11-KT levels and male head crest size was suggested, but there was no significant correlation between 11-KT levels and orange spot size.
キーワード: イソギンポ科 / Blenniidae / 繁殖 / Reproduction / 配偶者選択 / Mate choice / 性的二型 / Sexual dimorphism / アンドロジェン / Androgen / 潮間帯 / Intertidal zone
URI: http://hdl.handle.net/10069/36365
ISSN: 05471427
資料タイプ: Departmental Bulletin Paper
原稿種類: publisher
出現コレクション:第97号

引用URI : http://hdl.handle.net/10069/36365

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