Sex-biased mortality and adult body size in an anadromous salmon : investigation from the viewpoint of evolutionary ecology
Project/Area Number |
20770011
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Ecology/Environment
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Research Institution | Fisheries Research Agency (2011) Hokkaido University (2008-2010) |
Principal Investigator |
TAMATE Tsuyoshi 独立行政法人水産総合研究センター, 東北区水産研究所資源生産部, 任期付研究員 (30374200)
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Project Period (FY) |
2008 – 2011
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Project Status |
Completed (Fiscal Year 2011)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | 性特異的 / 摂餌戦略 / 生活史 / 淘汰 / 雌雄差 / サケ科魚類 / 海洋生活期の死亡率 / 成体の体サイズ / 性差 / 進化生態学 / 親魚の体サイズ |
Research Abstract |
Relationships between sex-biased mortality and adult body size were evolutionary-ecologically examined in anadromous masu salmon(Oncorhynchus masou) to better understand evolutionary causes and processes of sex-differences in animal life histories. In two tested populations, as predicted, female-biased mortality and sexual size dimorphism co-occurred. Such a co-occurrence of sex-biased traits found here might result from sex-specific feeding strategy that is due to sex-differences in breeding selection on adult body size.
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Report
(6 results)
Research Products
(17 results)
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[Journal Article] Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou2009
Author(s)
Morita, K., Tamate, T., Sugimoto, Y., Tago, Y., Watanabe, T., Konaka, H., Sato, M., Miyauchi, Y., Ohkuma, K. and Nagasawa, T.
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Journal Title
Journal of Fish Biology
Volume: 74
Issue: 3
Pages: 699-705
DOI
Related Report
Peer Reviewed
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[Journal Article] Latitudinal variation in egg size and number in anadromous masu salmon Oncorhynchus masou.2009
Author(s)
Morita, K., Tamate, T., Sugimoto, Y., Tago, Y., Watanabe, T., Konaka, H., Sato, M., Miyauchi, Y., Ohkuma, K., Nagasawa, T.
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Journal Title
Journal of Fish Biology 74
Pages: 699-705
Related Report
Peer Reviewed
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