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Ecological and genetic effects on diadromous fishes according to the artificial enviromental changes in rivers

Research Project

Project/Area Number 07660229
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionHokkaido University

Principal Investigator

GOTO Akira  Hokkaido Univ., Fac.of Fish., Associate Prof., 水産学部, 助教授 (30111165)

Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1996: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1995: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsWeir construction / River environments / Anadromous fishes / Land-locked / Genetic variability / Life-history changes / Species divergence / Biodiversity / 遡河回遊魚 / イトヨ / アメマス / 堰堤建設 / 河川型集団 / 生活史進化 / 遺伝的分化 / ボトルネック
Research Abstract

In the present study, the changes of life-history characteristics and genefrequency in anadromous after construction of dams or weirs in the course of rivers were investigated as a model study to estimate the degree of damage to diadromous fishes according to the artificial changes of environments in rivers. In detail, the rivers where weir was constructed were selected for this research. In the rivers, the land-locked populations of white-spotted charr (Salvelinus leucomaenis) and threespine stickleback (Gasterosteus aculeatus) inhabited upstream form the weir were compared with the downstream anadromous populations of each species for life-history characters, gene frequency and genetic variability, in order to estimate the biological effects on the populations.
Firstly, the fluvial populations were found to be distributed in the upstream reaches from the weir, suggesting the artificial formation of land-locked populations. The fluvial stickleback population from the NIshikitappu River showen low genetic valiability, prolongation of longevity, small body size at sexual maturity, wide reproductive season and small clutch size, compared with those of anadromous population. Similar results were obtained for white-spotted charrs in the rivers of Rebun Island.
As many biological depressions were detected in the land-locked populations of two anadromous species which had been already formed after construction of weirs, it is necessary to reconsider the merits and demerits of weir construction in natural rivers from the view points of conservation of biodiversity.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Goto, A.: "Life-history variations in the fluvial sculpin, Cottus nozawae (Cottidae), along the course of a small mountain stream." Env. Biol. Fish. ((In press))

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Higuchi, M.: "Genetic evidences supporting the existence of two distinct species in the genus Gasterosteus around Japan." Env. Biol. Fish. 47. 1-16 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Higuchi, M.: "Genetic structure of threespine stickleback, Gasterosteus aculeatus, in Lake Harutori, Japan, with reference to coexisting anadromous and freshwater forms." Ichthyol. Res.43. 349-358 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Okumura, N.: "Genetic variation and differentiation of the two river sculpins, Cottus nozawae and C. amblystomopsis, decuced from allozyme and restriction enzyme-digested mt DNA fragment length polymorphism analyses" Ichthyol. Res.43. 399-416 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yamazaki, Y.: "Genetic differentiation of Lethenteron reissneri populations, with reference to the existence of discrete taxonomic entities." Ichthyol. Res.43. 283-299 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 後藤晃: "通し回遊魚の適応戦略と種分化様式" 月刊海洋. 28. 286-293 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 後藤晃: "「日本動物大百科」日本の淡水カジカ類" 平凡社(印刷中),

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Goto, A.: "Life-history variations in the fluvial sculpin, Cottus nozawae (Cottidae), along the course of a small mountain stream." Env.Biol.Fish. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Higuchi, M.and A.Goto: "Genetic evidence supporting the existence of two distinct species in the genus Gasterosteus around Japan." Env.Biol.Fish.47. 1-16 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Higuchi, M., A.Goto and F.Yamazaki: "Genetic structure of threespine stickleback, Gasterosteus aculeatus, in Lake Harutori, Japan, with reference to coexisting anadromous and freshwater forms." Ichthyol.Res.43. 349-358 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Okumura, N.and A.Goto: "Genetic variation and differentiation of the two river sculpins, Cottus nozawae and C.amblystomopsis, deduced from allozyme and restriction enzyme-digested mtDNA fragment length polymorphism analyzes." Ichthyol.Res.43. 399-416 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Yamazaki, Y.and A.Goto: "Genetic differentiation of Lethenteron reissneri populations, with reference to the existence of descrete taxonomic entities." Ichthyol.Res.43. 283-299 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Goto, A.: "Adaptive strategies and the modes of speciation in diadromous species. (in Japanese)." Gekkan Kaiyou. 28. 286-293 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Goto, A.: "Freshwater sculpins in Japan" in Encyclopedia of Japanese animals.(in Japanese). Heibon-sha, Tokyo (in press),

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] GOTO, A.: "Life-history variations in the fluvial sculpin, Cottus nozawae (Cottidae), along the course of a small mountain stream." Env. Biol. Fish.(in press).

    • Related Report
      1996 Annual Research Report
  • [Publications] Higuchi, M.: "Genetic evidence supporting the existence of two distinct species in the genus Gasterosteus around Japan." Env. Biol. Fish.47. 1-16 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Higuchi, M.: "Genetic structure of threespine stickleback, Gasterosteus aculeatus, in Lake Harutori, Japan, with reference to coexisting anadromous and freshwater forms." Ichthyol. Res.43. 349-358 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Okumura, N.: "Genetic variation and differentiation of the two river sculpins, Cottus nozawae and C. amblystomopsis, deduced from allozyme and restriction enzyme-digested mt DNA fragment length polymorphism analyses" Ichthyol. Res.43. 399-416 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamazaki, Y.: "Genetic differentiation of Lethenteron reissneri populations, with reference to the existence of discrete taxonomic entities." Ichthyol. Res.43. 283-299 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 後藤晃: "通し回遊魚の適応戦略と種分化様式" 月刊海洋. 28. 286-293 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 後藤晃: "「日本動物大百科」日本の淡水カジカ類" 平凡社(印刷中),

    • Related Report
      1996 Annual Research Report
  • [Publications] Okumura,N.,Y.Hasebe and A.Goto: "Genetic variation of Cottus nozawae populations from five tributaries of the Shiribetsu River of southern Hokkaido." Ichthyol.Res.43. 65-71 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Goto A.: "Life history variations in the fluvial sculpin,Cottus nozawae(Cottidae),along the course of a small mountain stream." Env.Biol.Fish.45(in press). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Higuchi M.and A.Goto: "Genetic evidence supporting the existence of two distinct species in the genus Gasterosteus around Japan." Env.Biol.Fish.45(in press). (1996)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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