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2005 Fiscal Year Final Research Report Summary

Vision and behavior in crustacean decapods

Research Project

Project/Area Number 15580162
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

KOIKE Takashi  Mie University, Faculty of Bioresources, Professor, 生物資源学部, 教授 (60093126)

Project Period (FY) 2003 – 2005
KeywordsJapanese spiny lobster / rock crab / ethology / light threshold / spectral sensitivity / direction of light / localization / directional sensitivity
Research Abstract

Diurnal variation of moving activity of Japanese spiny lobsters and rock crabs were investigated in small indoor tanks. We modeled the diurnal of variation of light intensity with step-like brightness variation having 12L12D periods. The lobster and the crab movements were detected by measuring tension of wire which hang lobster and crab cage. When the brightness is higher than threshold value of the lobster and the crab, the activity variation of them occurs just in phase with the brightness variation. When the daytime brightness was changed to lower than the threshold value, the variation pattern was disturbed, and their activity was high even in daytime. The threshold value of the lobster was about 2.3 x 10^<-5> lx, and that of the rock crab was about 5.7 x 10^<-3> lx, respectively. We obtained spectral sensitivity for lobster by using this scheme, high sensibility was between 490-520nm with a sharp fall-off in sensibility in 590 nm.
Light environments, the spectral irradiance and turbidity of water in the habitat of crustacean decapods were measured in Ise Bay and its neighboring waters. The light at the wavelength 565 nm penetrated to the deepest in Ise Bay while that was at the wavelength 490 nm in its neighboring waters (the open coastal waters).

  • Research Products

    (4 results)

All 2005

All Journal Article (4 results)

  • [Journal Article] イシガニ(Charybdis japonica)の感知し得る明るさの下限値2005

    • Author(s)
      真鍋美智子, 守屋和昭, 小池 隆
    • Journal Title

      日水誌 71

      Pages: 628-630

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 伊勢湾とその周辺海域における海中の光ど濁度の分布-甲殻十脚類の生息する海中の光環境について-2005

    • Author(s)
      中村亨, 守屋和昭, 森田雅之, お池隆
    • Journal Title

      三重大生物資源紀要 31

      Pages: 45-59

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Minimum daytime brightness recognized by Japanese rock crabs.2005

    • Author(s)
      M.Manabe, K.Moriya, T.Koike
    • Journal Title

      Nippon Suisan Gakkaishi 71

      Pages: 628-630

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characteristics of spectral irradiance and turbidity in Ise Bay and its neighboring waters-light environments in the habitat of crustacean decapods-2005

    • Author(s)
      T.Nakamura, K.Moriya, M.Morita, T.Koike
    • Journal Title

      The Bulletin of the Faculty of Bioresources, Mie University No.31

      Pages: 45-59

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

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