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Comparative Molecular Phylogenetic Study on Speciation and Genetic Differentiation of Marine Organisms between the Pacific Ocean and the Japan Sea

Research Project

Project/Area Number 10836007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 自然史科学
Research InstitutionUniversity of Tokyo

Principal Investigator

KOJIMA Shigeaki  Ocean Research Institute, Department of Marine Ecosystems Dynamics, University of Tokyo Associate Professor, 海洋研究所, 助教授 (20242175)

Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2000: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1999: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1998: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsJapan Sea / Last Glacial Period / mitocondrial DNA / genetic differentiation / molecular phylogeney / water currents / ウミニナ類 / 黒潮 / 対馬暖流 / 幼生型 / 海洋生物 / 種分化 / バテイラ / 亜種 / ノロゲンゲ / 集団構造 / 太平洋 / イシダタミ類
Research Abstract

In order to reveal effects of large enviromnental changes during the Pleistocene on marine organisms in the Japan Sea, population structures of various marine organisms were analyzed using molecular phylogenetic methods.
The analysis of the most dominant deep-sea demersal fish of the Japan Sea, Bothricara hollandi, showed that populations of this species consist of the two genetically different groups and it was suggested that no drastic environmental change occurred near the Thushima Strait during the last glacial period.
While the clear genetic structure of a population of the Japanese turban shell, Turbo (Batillus) cornutus, whose planktonic period is very short, formed during the Pleistocene and have been kept until now, the genetic structure of an intetidal gastropod wth much longer planktonic period, Omphalinus pfeifferi, was shown to have formed after the end of the last glacial period. Individuals of O.pfeifferi, which were isolated in the Japan Sea, are thought to have become the subspedes, O.pfeifferi carpenteri, in the relatively short period.
A direct-developing mud flat snail, Batillaria cumingi, showed more diverged genetic structure than the congeneric planktonic species, B.multiformis as well as the Japanese turban shell. No clear genetic differentiation was detected between the Japan Sea and the Pacific for some shallow water gastropods, namely Sulculus diversicolor, Astralium haematragum, Chlorostoma argyrostoma and Monodonta labio.
The present results suggest the importance of larval dispersal ability far the formation of the genetic structures of marine species.

Report

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

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 小島茂明: "分子海洋学-遺伝子で調べる海洋環境変動史-"月刊海洋. 32. 205-208 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kajima,S.,R.Segawa and I.Hayashi: "Stability of the courses of the warm constal currents along the Kyushu Island suggested by the population structure of the Japanese turban shell Turbo (Batilus) cornutu"Journal of Oceanography. 56. 601-604 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kajima,S.,R.Segawa,I.Hayashi and M.Okiyama: "Phylogeography of a deep-sea demersal fish, Bothrocara hollandi, in the Japan Sea."Marine Ecology Progress Series. (in press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeaki Kojima: "Molecular Oceanography-Studies of marine environmental changes using analyses of genes-(in Japanese)."Kaiyo Monthly. 32. 205-208 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeaki Kojima, Ryoko Segawa and Ikuo Hayashi: "Stability of the courses of the Warm coastal currents along the Kyushu Island suggested by the population structure of the Japanese turban shell Turbo (Batillus) cornutus."Journal of Oceanography. 56. 601-604 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeaki Kojima, Ryoko Segwa, Ikuo Hayashi and Muneo Okiyama: "Phylogeography of a deep-sea demersal fish, Bothrocara hollandi, in the Japan Sea."Marine Ecology Progress Series. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Shigeaki Kojima,Ryoko Segawa and Ikuo Hayashi: "Stability of the courses of the waving coastal currents along the kyushu Island suggested by the population sttucture of the Japanese tuskan shell, tuska (Bafillas) counnts."Journal of Oceanography. 56. 601-604 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Shigeaki Kojima,Ryoko Segawa,Ikuo Hayashi and Muneo Okiyama: "Phylogeography of a deep-sea demersal fish, Bothrocana hollandi in the Japan Sea"Marine Ecology Progress Seriese. (印刷中).

    • Related Report
      2000 Annual Research Report
  • [Publications] 小島 茂明: "分子海洋学 ―遺伝子で調べる海洋環境変動史―"月刊海洋. 32・4. 1-4 (2000)

    • Related Report
      1999 Annual Research Report

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

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