Sex-biased mortality and adult body size in an anadromous salmon : investigation from the viewpoint of evolutionary ecology

2011 Fiscal Year Final Research Report

• Project/Area Number: 20770011
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Ecology/Environment
• 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)
• Project Period (FY): 2008 – 2011
• Keywords: 性特異的 / 摂餌戦略 / 生活史 / 淘汰 / 雌雄差

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.

Research Products

• [Journal Article] A concise review of geographic variation in adult body size in anadromous masu salmon (2012)
  • Author(s): Tamate, T.
  • Journal Title: Oncorhynchus masou. Environmental Biology of Fishes Volume: 94 Pages: 527-532
  • DOI: DOI:10.1007/s10641-009-9552-x
  • Peer Reviewed
• [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. and Nagasawa, T.
  • Journal Title: Journal of Fish Biology Volume: 74 Pages: 699-705
  • DOI: DOI:10.1111/j.1095-8649.2008.02150.x
  • Peer Reviewed
• [Journal Article] Spatial distribution of female masu salmon, Oncorhynchus masou, with male-specific marker growth hormone pseudogene in Hokkaido
  • Author(s): Yamamoto, T., Kitanishi, S., Tamate, T. and Suzuki, N.
  • Journal Title: Environmental Biology of Fishes
  • DOI: DOI:10.1007/s10641-012-0013-6
  • Peer Reviewed
• [Presentation] 北海道におけるサクラマス幼稚魚のハビタットシフト (2012)
  • Author(s): 黒木真理・近藤祐史・吉永龍起・森田健太郎・玉手剛
  • Organizer: 平成24年度日本水産学会春季大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2012-03-28
• [Presentation] Interpopulation variation in adult body size and secondary sexual traits of sea-run male masu salmon : a preliminary study (2012)
  • Author(s): Tamate, T
  • Organizer: Joint Meeting of the 59th Annual Meeting of Ecological Society of Japan
  • Place of Presentation: Otsu, Japan
  • Year and Date: 2012-03-19
• [Presentation] 降海型サクラマスにおける死亡率と体サイズの性差の個体群間比較:地理的パターンに関する予測 (2009)
  • Author(s): 玉手剛
  • Organizer: 2009年度(第42回)日本魚類学会年
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2009-10-12
• [Book] 日本在来魚における適応的分化(「極東固有サケ科魚類(サクラマス,アメマス)における生活史形質の地理的変異について」執筆) (2010)
  • Author(s): 玉手剛
  • Total Pages: 323-329
  • Publisher: 月刊海洋海洋出版株式会社