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Studies on response processes of ocean ecosystem to environmental changes and effect on the replacement of dominant pelagic fish species

Research Project

Project/Area Number 10306012
Research Category

Grant-in-Aid for Scientific Research (A).

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionOcean Research Institute, University of Tokyo

Principal Investigator

SUGIMOTO Takashige  Ocean Res. Inst. University of Tokyo Professor, 海洋研究所, 教授 (40004428)

Co-Investigator(Kenkyū-buntansha) MATSUDA Hiroyuki  Ocean Res. Inst. University of Tokyo Associate Professor, 海洋研究所, 助教授 (70190478)
WATANABE Yoshiro  Ocean Res. Inst. University of Tokyo Professor, 海洋研究所, 教授 (90280958)
TERAZAKI Makoto  Ocean Res. Inst. University of Tokyo Professor, 海洋研究所, 教授 (20111586)
KIMURA Shingo  Ocean Res. Inst. University of Tokyo Associate Professor, 海洋研究所, 助教授 (90202043)
KOMATSU Teruhisa  Ocean Res. Inst. University of Tokyo Associate Professor, 海洋研究所, 助教授 (60215390)
中田 英昭  東京大学, 海洋研究所, 助教授 (60114584)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥36,300,000 (Direct Cost: ¥36,300,000)
Fiscal Year 2000: ¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1999: ¥13,400,000 (Direct Cost: ¥13,400,000)
Fiscal Year 1998: ¥15,200,000 (Direct Cost: ¥15,200,000)
Keywordsmarine living resources / pelagic fish / plankton / food web / ocean ecosystem / global change / population dynamics Western North Pacific
Research Abstract

The research were focussed on the following unresolved problems relating to the recruitment processes of small pelagic fish. (1) effect of larval transport and retension, (2) effect of water temperature and feeding environment on larval growth (3) effect of larval growth rate and probability contacting with predator on the larval morality (4) improvement models on the replacement mechanism of small pelagic fish species. For this purpose, intensive field survey on the Kuroshio and Kuroshio-Oyashio transition regions, laboratory experiment, historical data analysis, were conducted. Main results are as followings.
(1) By using historical data and supplying rate of sardine larvae in the Kuroshio, its retension area is increased during the period of large meander path of the Kuroshio. However, retension rate of anchovy larvae in the spawning ground in the Enshu-Nada Sea is increased during the period. It was found that this replacement of two modes of the Kuroshio path affect on the replacement of dominance between sardine and anchovy. (2) Based on the analysis of otolith and stomach content of anchovy juvenile, importance of water temperature and food density on the growth rate, the timing of metamorphosis on the recruitment rate were made clear. (3) Chlorophyll concentration in the Kuroshio-Oyashio transition region in spring were in high level during 1970s and 1980s. It was found that this corresponds to the intensified period of southward expansion of the Oyashio area and also to the period of better recruitment of Japanese sardine. (4) Timing of spring bloom in the Kuroshio-Oyashio transition region was delayed by about one month during later 1970s and earlier 1980s. This fact supports the importance of match-mismatch between pelagic fish and food plankton. (5) It was pointed out that overfishing of Japanese common mackerel in the unmatured stage suppressed its recovery of the stock and elongation of the anchovy stock.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (34 results)

All Other

All Publications (34 results)

  • [Publications] 杉本隆成: "西部北大平洋におけるプランクトン量と環境の10年-10数年スケールの変動"水産海洋研究. 64(3). 173-178 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Terazaki,M.: "Utilization of Biological Data for IODE system in the WESTPAC area."In : Proceedings of ICWP'99 conference, JODC, Japan Coast Guard. 163-165 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kimura,R.: "Nutritional condition of first-feeding larvae of sardine caught in the Kuroshio current areas."ICES Journal of Marine Science.. 57. 240-248 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsuda,H.: "Rproductive value, harvest value, impact multiplier as indicators for maximum sustainable fisheries."Environmental Economics and Policy Studies. 2. 129-146 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 池上彰一: "ニューラルネットワークを用いたモジャコ漁況の予測."黒潮の資源海洋研究. 1. 39-43 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kimura S.: "Two processes by which short-period fluctuations in the meander of the kuroshio affect its countercurrent."Deep-Sea Rec.. I. 745-754 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sugimoto T.: "Impact of E1 Nino Events on Marine Livig Resources and Their Physical Environments in the Western North Pacific."Progress of Oceanogr. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sainz-Trapaga: "Three dimensional velocity field anSd cross-frontal water exchange in the Kuroshio Extension."Proc. of the Int. Mar. Sci. Symp. On Ecosystem Dynamics of the Kuroshio-Oyashio Transition Region, J.Oceanogr.. 56. 79-92 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Terazaki, M.: "Feeding of carnivous zooplankton, chaetognath in the Pacific, In : Dynamics and Charaterization of Marine Organic Matter."Tanoue, E.and T.Hama (editor), TERAPUB, Tokyo. 257-276 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Terazaki, M.: "Utilization of Biological Data for IODE system in the WESTPAC area."In : Proceedings of ICWP'99 conference, JODC, Japan Coast Guard. 163-165 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsuda H.: "Rproductive value, harvest value, impact multiplier as indicators for maximum sustainable fisheries."Environmental Economics and Policy Studies. 2. 129-146 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsuda H.: "Extinction risk assessment of declining wild populations : in the case of the southern bluefin tuna."Researches on Population Ecology. 40. 271-278 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ikenoue S.: "Prediction ofb larval-yellowtail catch using a neural network."Fisheries biology andoceanography in the Kuroshio. 39-43 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kimura S.: "Two processes by which short-period fluctuations in the meander of the kuroshio affect its countercurrent."Deep-Sea Rec.I. 47. 745-754 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kimura, R.: "Nutritional condition of first-feeding larvae of sardine caught in the Kuroshio current areas."ICES Journal of Marine Science. 57. 240-248 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Nakata, H.: "Alternating dominance of postlarval sardine and anchovy caught by coastal fishery in relation to the Kuroshio meander in the Enshu-nada Sea."Fish. Oceanogr.. 9(3). 248-258 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 杉本隆成: "西部北大平洋におけるプランクトン量と環境の10年-10数年スケールの変動."水産海洋研究.. 64(3). 173-178 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Terazaki,M.: "Utilization of Biological Data for IODE system in the WESTPAC area."In : Proceedings of ICWP'99 conference, JODC, Japan Coast Guard. 163-165 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kimura,R.: "Nutritional condition of first-feeding larvae of sardine caught in the Kuroshio current areas."ICES Journal of Marine Science. 57. 240-248 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Matsuda,H.: "Rproductive value, harvest value, impact multiplier as indicators for maximum sustainable fisheries."Environmental Economics and Policy Studies. 2. 129-146 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 池上彰一: "ニューラルネットワークを用いたモジャコ漁況の予測."黒潮の資源海洋研究. 1. 39-43 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Kimura S.: "Two processes by which short-period fluctuations in the meander of the kuroshio affect its countercurrent."Deep-Sea Rec.. 1. 745-754 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Susana Sainz Jrapaga: "Three-dimensional velocity field and cross-frontal water exchange in the Kuroshio extension"Journal of Oceanography. 56. 79-92 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Broder, R. D.: "Spring time abundance of chaestogneths in the shelf region of the nothern Gulf Alaska, with observations on the vertical distribution and feeding of sagettaelage"Fish. Oceanogr.. 8. 93-103 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Watanabe, Y.: "Food availability for larval Sardinops melanostictus in the Kuroshio-Oyashio transition Waters off Buso Peninsula"Proceedings of the international marine science sympustum on ecosystem dynamics of the Kuroshio-Oyashio transition. 194-205 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Nakata, H.: "Physical and biological characteristic of the aggregation of anchovy eggs and larval around the northern edge of Kuroshio extension"Proc. of international marine science symposium on ecosystern dynamics of the Kuroshio-Oyashio transition region. 221-230 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tameishi, H.: "Prediction of skipjack catch in the water off Tohoku by a neural network"Bull. Japan Soc. Fish Oceanogr.. 62. 327-333 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kimura, S.: "Numerical simulation to resolve the downstreem migration of the Japanese eel"Marine Ecology Progress Series. 186. 303-306 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Sugimoto, T.: "Interannual-interdecadal variations in zooplankton biomass, chlorophyll concentration and physical environment in subarctic Pacific and Bering Sea." Fisheries Oceanography. 6. 74-93 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kimura, S.: "Biological productivity of meso-scale eddies caused by frontal disturbances in the Kuroshio." ICES Journal of Marine Science. 54. 179-192 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Terazaki, M.: "Life history, distribution, seasonal variabillity and feeding of pelagic chaetognath Sagitta elegans in the Subarctic Pacific." Plankton Biol.Ecol.45. 1-17 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Watanabe, Y.: "Growth of larval sardine in the Pacific coastal waters of central Japan." Fish.Bull., U.S.96. 900-907 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Nakata, H.: "Physical and biological characteristics of the aggregation of anchovy eggs and larvae around the northern edge of Kuroshio Extension." Proc.of International Marine Science Sympojium on Ecosystem Dynamics of the Kuroshio-Oyashio Transition Region, Mutsu and Hakodate. 25-28 Aug.221-230 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Komatsu, T.: "Long-term changes in the Zostera bed area in the Seto Inland Sea (Japan) , especially along the coast of the Okayama Prefecture." Oceanologica Acta.20. 209-216 (1997)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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