HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
共同研究拠点  >
21世紀COEプログラム「新・自然史科学創成」  >
Neo-Science of Natural History : Integration of Geoscience and Biodiversity Studies >
Proceedings >

Sexual Difference in Masu Salmon : Female-Biased Sexual Size Dimorphism in a Lacustrine Population, Northern Hokkaido, Japan

フルテキスト
p79-83-neo-science.pdf1.13 MBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/38510

タイトル: Sexual Difference in Masu Salmon : Female-Biased Sexual Size Dimorphism in a Lacustrine Population, Northern Hokkaido, Japan
著者: Tamate, Tsuyoshi 著作を一覧する
キーワード: Body size
Sexual differences
Sexual size dimorphism (SSD)
発行日: 2004年
出版者: Graduate School of Science, Hokkaido University
引用: Edited by Shunsuke F. Mawatari, Hisatake Okada.
誌名: Neo-Science of Natural History: Integration of Geoscience and Biodiversity Studies : Proceedings of International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies" March 5-6, 2004, Sapporo
開始ページ: 79
終了ページ: 83
抄録: To explore evolutionary processes of sex-specific traits, it is examined whether adult body size or growth during the migration phase (the lacustrine-phase after smolting) differ between the sexes in migratory (lake-run) masu salmon (Oncorhynchus masou) in a lacustrine population (Shumarinai Lake), northern Hokkaido, Japan. Although there was no difference in smolt length between the sexes, female adults were larger in body length than males of the same age, indicating female-biased sexual size dimorphism (SSD) occurs. It is supposed that breeding selection favouring a larger body size for females than for males in this population probably requires that females undertake more intensive foraging behaviour with faster growth rates during the migration phase. It therefore seems to be likely that the selection is the ultimate cause of the female-biased SSD.
記述: International Symposium on "Dawn of a New Natural History - Integration of Geoscience and Biodiversity Studies". 5-6 March 2004. Sapporo, Japan.
資料タイプ: proceedings
URI: http://hdl.handle.net/2115/38510
出現コレクション:Proceedings

 

本サイトに関するご意見・お問い合わせは repo at lib.hokudai.ac.jp へお願いします。 - 北海道大学