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Reexamination of migration patterns of masu salmon Oncorhynchus masou inferredfrom new otolith techniques

Research Project

Project/Area Number 22780173
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field General fisheries
Research InstitutionThe University of Tokyo

Principal Investigator

KUROKI Mari  東京大学, 総合研究博物館, 助教 (00568800)

Project Period (FY) 2010 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords初期生活史 / 回遊生態 / サクラマス / スモルト / 生活史多型 / 耳石 / 海洋生態 / 水産学 / 魚類学 / 行動生態 / 環境対応
Research Abstract

The habitat shifts of the juvenile of masu salmon, Oncorhynchus masou, were studied at four streams in Hokkaido. Otolith Sr:Ca ratios of smolts in the Betsubetsu, Ninaibetsu and Moshosanbetsu rivers, showed low values, suggesting that these fishes remained in freshwater habitat until the smolt stage, while the ratios of the smolts in the Tokotan River increased after the fry stage suggesting that they might have experienced the brackish water habitat. A similar pattern was observed in all of the three years studied. The Tokotan River is the steepest and the stream width is narrow causing rapid flow, although the annual water temperature of the Tokotan River is intermediate among streams studied. These results suggest that the topography and resultant flow conditions may influence the habitat shifts of masu salmon, and the juveniles in the Tokotan River may be flushed out of the river with the strong flows from melted snow in early spring.

Report

(4 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • Research Products

    (7 results)

All 2013 2012 2011 2010 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results)

  • [Journal Article] Validation and efficacy of trans-generational mass marking of otoliths in viviparous fish larvae.2010

    • Author(s)
      Kuroki, M., Buckley, R.M., LeClair, L.L.,Hauser, L.
    • Journal Title

      Journal of Fish Biology.

      Volume: 77(1) Issue: 1 Pages: 292-298

    • DOI

      10.1111/j.1095-8649.2010.02681.x

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Validation and efficacy of trans-generational mass marking of otoliths in viviparous fish larvae2010

    • Author(s)
      Kuroki, M., Buckley, R.M., LeClair, L.L., Hauser, L
    • Journal Title

      Journal of Fish Biology

      Volume: 77 Pages: 292-298

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Presentation] 水温上昇がサクラマスの生活史と個体群動態に及ぼす影響.2013

    • Author(s)
      森田健太郎, 玉手剛, 黒木真理, 永沢亨.
    • Organizer
      日本生態学会
    • Place of Presentation
      静岡
    • Year and Date
      2013-03-08
    • Related Report
      2012 Final Research Report
  • [Presentation] 北海道におけるサクラマス魚のハビタットシフト.2012

    • Author(s)
      黒木真理, 近藤祐史,吉永龍起郎, 玉手剛.
    • Organizer
      日本水産学会
    • Place of Presentation
      東京
    • Year and Date
      2012-03-28
    • Related Report
      2012 Final Research Report
  • [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
      日本水産学会
    • Place of Presentation
      東京海洋大学(東京都)
    • Year and Date
      2012-03-28
    • Related Report
      2011 Annual Research Report
  • [Presentation] Efficacy of inducing Sr marks in otoliths of larval viviparous fishes : comments on the utility of larval otolith marking2011

    • Author(s)
      Buckley, R.M., LeClair, L.L., Kuroki, M., Hauser, L.
    • Organizer
      American Fisheries Society 141st Annual Meeting
    • Place of Presentation
      Convention Center(アメリカ)
    • Year and Date
      2011-07-06
    • Related Report
      2011 Annual Research Report
  • [Presentation] 水温上昇がサクラマスの生活史と個体群動態に及ぼす影響

    • Author(s)
      森田健太郎
    • Organizer
      日本生態学会
    • Place of Presentation
      静岡県コンベンションアーツセンター
    • Related Report
      2012 Annual Research Report

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Published: 2010-08-23   Modified: 2019-07-29  

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