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Factors affecting population regulation of salmonid fishes

Research Project

Project/Area Number 19780155
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field General fisheries
Research InstitutionFisheries Research Agency

Principal Investigator

MORITA Kentaro  Fisheries Research Agency, 北海道区水産研究所, 主任研究員 (30373468)

Project Period (FY) 2007 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥3,330,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2007: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsサケ科魚類 / 野生魚 / 個体群動態 / ベーリング海 / 成長 / 生息密度 / 水温 / 自然産卵 / 水産資源学 / 水産資源管理 / 数理モデル / 鯨 / 目視
Research Abstract

サケ科魚類は川で産卵し稚魚期を過ごした後,海へ下り大きく成長するため,大きく異なる2つの生息環境を利用している.河川では密度依存的な死亡・成長に加えて,密度非依存的な環境変化による死亡(または移出入)が大きく,海洋では密度依存的な成長がおもな個体数制限要因になると考えられた.海洋での密度依存的な成長は,産卵数の低下という現象をして個体群増加率の低下をもたらすと考えられた.このように,サケ科魚類の個体数制限要因を解明するためには,海洋と河川の双方を包括的に理解する必要があると考えられた.

Report

(4 results)
  • 2009 Annual Research Report   Final Research Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (23 results)

All 2010 2009 2008 2007 Other

All Journal Article (12 results) (of which Peer Reviewed: 11 results) Presentation (10 results) Remarks (1 results)

  • [Journal Article] Size-dependent thermal preferences in a pelagic fish.2010

    • Author(s)
      Morita, K., Fukuwaka, M., Tanimata, N., Yamamura, O.
    • Journal Title

      Oikos (In press)

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Habitat fragmentation by damming threatens coexistence of stream-dwelling charr and salmon in the Fuji River, Japan.2010

    • Author(s)
      Tsuboi, J., Endo, S., Morita, K.
    • Journal Title

      Hydrobiologia (In press)

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Latitudinal variation in the growth and maturation of masu salmon parr.2010

    • Author(s)
      Morita, K., Nagasawa, T.
    • Journal Title

      Canadian Journal of Fisheries and Aquatic Sciences 67

      Pages: 955-965

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Offshore Dolly Varden charr (Salvelinus malma) in the North Pacific.2009

    • Author(s)
      Morita, K., Morita, S.H., Fukuwaka, M., Nagasawa, T.
    • Journal Title

      Environmental Biology of Fishes 86

      Pages: 451-456

    • Related Report
      2009 Final Research Report
    • 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., Nagasawa, T.
    • Journal Title

      Journal of Fish Biology 74

      Pages: 699-705

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] 北海道東部中規模河川庶路川における魚類の流程分布と魚類相の変遷2009

    • Author(s)
      永沢亨, 森田健太郎, 坪井潤一
    • Journal Title

      魚類学雑誌 56

      Pages: 31-45

    • Related Report
      2009 Annual Research Report 2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Plasticity in probabilistic reaction norms for maturation in a salmonid fish2009

    • Author(s)
      Morita, K., Tsuboi, J., Nagasawa, T.
    • Journal Title

      Biology Letters 5

      Pages: 628-631

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Offshore Dolly Varden charr (Salvelinus malma) in the North Pacific2009

    • Author(s)
      Morita, K., Morita, S.H., Fukuwaka, M., Nagasawa, T.
    • Journal Title

      Environmental Biology of Fishes 86

      Pages: 451-456

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A resource selection model for analyzing pseudoreplicated data due to grouping behavior of animals2008

    • Author(s)
      Hiroshi Okamura, Masashi Kiyota, Toshihide Kitakado
    • Journal Title

      Journal of Agricultural, Biological, and Environmental Statistics 13

      Pages: 294-312

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Toward sustainable management of small cetacean fisheries around Japan2008

    • Author(s)
      Hiroshi Okamura, Toshihide Iwasaki, Timio Miyashita
    • Journal Title

      Fisheries Science 74

      Pages: 718-729

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 総合討論:大型海洋動物のトラッキングデータの解析手法:最近の発展2008

    • Author(s)
      岡村寛・北川貴士・米崎史郎・清田雅史
    • Journal Title

      水産海洋研究 72

      Pages: 251-253

    • Related Report
      2008 Annual Research Report
  • [Journal Article] Plasticity in probabilistic reaction norms for maturation in a salmonid fish.

    • Author(s)
      Morita, K., Tsuboi, J., Nagasawa, T.
    • Journal Title

      Biology Letters 5

      Pages: 628-631

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Presentation] variation in parr growth and maturation in anadromous masu salmon, Oncorhynchus masou.2009

    • Author(s)
      Morita, K., Nagasawa, T.
    • Organizer
      International Symposium on Formosa Landlocked Salmon and Masu Salmon
    • Place of Presentation
      台北
    • Year and Date
      2009-10-24
    • Related Report
      2009 Final Research Report
  • [Presentation] Seasonal changes in the population densities of stream-dwelling salmonids in two contrasting tributaries of a subarctic river.2009

    • Author(s)
      Morita, K., Morita, S.H., Nagasawa, T.
    • Organizer
      International Symposium on Formosa Landlocked Salmon and Masu Salmon
    • Place of Presentation
      台北
    • Year and Date
      2009-10-23
    • Related Report
      2009 Final Research Report
  • [Presentation] Seasonal changes in the population densities of stream-dwelling salmonids in two contrasting tributaries of a subarctic river.2009

    • Author(s)
      Morita, K., Morita, S.H., Nagasawa, T.
    • Organizer
      International Symposium on Formosa Landlocked Salmon and Masu Salmon
    • Place of Presentation
      台北,国立台湾師範大学
    • Year and Date
      2009-10-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] カラフトマスの周期的な個体数変動2009

    • Author(s)
      森田健太郎, 森田晶子, 福若正章, 永沢亨
    • Organizer
      日本生態学会第57回大会
    • Place of Presentation
      東京
    • Year and Date
      2009-03-17
    • Related Report
      2009 Final Research Report
  • [Presentation] The simulation-based management of small cetacean fisheries around Japan2008

    • Author(s)
      Okamura, H., Hiramatsu, K., and Miyashita, T.
    • Organizer
      5th World Fisheries Congress
    • Place of Presentation
      横浜市
    • Year and Date
      2008-10-24
    • Related Report
      2008 Annual Research Report
  • [Presentation] Size-dependent effect of temperature on growth of chum salmon: Implications of global warming2008

    • Author(s)
      Morita, K., Fukuwaka, M.
    • Organizer
      5th World Fisheries Congress
    • Place of Presentation
      横浜
    • Year and Date
      2008-10-22
    • Related Report
      2009 Final Research Report
  • [Presentation] Habitat fragmentation by damming threatens the coexistence of stream-dwelling charr and salmon2008

    • Author(s)
      Tsuboi, J., Endou, S., Morita, K.
    • Organizer
      5th World Fisheries Congress
    • Place of Presentation
      横浜
    • Year and Date
      2008-10-22
    • Related Report
      2009 Final Research Report
  • [Presentation] Potential effect of rising temperature on growth performance and its influence on chum salmon2008

    • Author(s)
      Morita, K., Fukuwaka, M.
    • Organizer
      International Symposium Effects of Climate Change on the World's Oceans
    • Place of Presentation
      ヒホン, スペイン
    • Year and Date
      2008-05-21
    • Related Report
      2009 Final Research Report
  • [Presentation] 大きい魚は冷たい水を好む:体サイズに依存した最適成長水温2008

    • Author(s)
      森田 健太郎・福若 雅章・谷全 尚樹・山村 織生
    • Organizer
      第55回日本生態学会
    • Place of Presentation
      福岡国際会議場.
    • Year and Date
      2008-03-17
    • Related Report
      2007 Annual Research Report
  • [Presentation] 戸切地川上流におけるサケ科魚類3種の動向:2002〜2007年2007

    • Author(s)
      森田 健太郎
    • Organizer
      第29回魚類系統研究会
    • Place of Presentation
      ネイパル洞爺
    • Year and Date
      2007-12-01
    • Related Report
      2007 Annual Research Report
  • [Remarks]

    • URL

      http://cse.fra.affrc.go.jp/okamura/main/index.html

    • Related Report
      2008 Annual Research Report

URL: 

Published: 2007-04-01   Modified: 2016-04-21  

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