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1996 Fiscal Year Final Research Report Summary

Studies on fish feeding rhythms and their application

Research Project

Project/Area Number 07660259
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field General fisheries
Research InstitutionTeikyo University of Science & Technology

Principal Investigator

TABATA Mitsuo  Teikyo Univ. Sci. & Technol., Dep.Biosci., Prof., 理工学部, 教授 (70041853)

Co-Investigator(Kenkyū-buntansha) IIGO Masayuki  St.Mariana Univ.Sch.Med., Assis.Prof., 医学部, 助手 (10232109)
Project Period (FY) 1995 – 1996
KeywordsDemand feeding / daily rhythm / Circadian rhythm / Pineal organ / Eye / Melatonin / Biological clock
Research Abstract

1. Fish can learn demand feeding by operant conditioning. We kept red sea bream, goldfish and masu salmon by demand feeding method. Feeding and locomoter activity rhythms were simultaneously recorded. As the results, (1) these species easily learned demand feeding both individually or in groups. We could keep them longer only by this method. (2) Demand feeding showed better growth rate than the regular way of restricted feeding, especially in goldfish. (3) Circadian rhythms of both feeding and locomotor activities were confirmed under constant conditions, suggesting the existence of biological clock in these species.
2. Multiple oscillators are assumed to be involved in the fish circadian system of locomotor, feeding and physiological functions. Correlation between oscillators and functions, however, are still controversial. Location of biological clock was investigated from the study of melatonin, the time-keeping hormone. As the results, (1) we found that goldfish eye has the biological clock. (2) There were no positive data on biological clock in the pineal organ of masu salmon and European sea bass, and the eye of European sea bass. (3) Melatonin profile in the eye of European sea bass under light-dark cycle displayd reversal pattern compared to the other fish species. (4) Melatonin receptors in the brain of goldfish coupled with G-proten. Daily rhythms of these receptors were down regulated by the pineal melatonin.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Sanchez-Vazquez,F.J.: "Demand-feeding and locomoter circadian rhythms in the goldfish,Carassius auratus : Dual and independent phasing." Physiology and Behavior. 60. 665-674 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iigo,M.: "Circadian rhythms of locomotor activity in the goldfish,Carassius auratus." Physiology and Behavior. 60. 775-781 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iigo,M.: "Circadian rhythms of locomotor activity in the rainbowtrout,Oncorhyncus mykiss." Fisheries Science. 63. 77-80 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iigo,M.: "Ocular melatonin rhythms in the goldfish,Carassius auratus." Journal of Biological Rhythms. 12. 182-192 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sanchez-Vazquez,F.J.: "Daily cycles in plasma and ocular melatonin in demand-fed sea bass,Dicentrarchus labrax,L." Journal of Comparative Physiology,B. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Iigo,M.: "Ocular melatonin rhythms in a cyprinid teleost,oikawa Zacco platypus,are driven by light-dark cycle." Zoological Science. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] F.J.Sanchez-Vazquez: "Demand-feeding and locomotor circadian rhythms in the goldfish, Carassius auratus : Dual and independent phasing" Physiology and Behavior. 60. 665-674 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Iigo: "Circadian rhythms of locomotor activity in the goldfish" Carassius auratus. Physiology and Behavior. 60. 775-781 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Iigo: "Circadian rhythms of locomotor activity in the rainbow trout" Oncorhynchus mykiss. Fisheries Science. 63. 77-80 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Iigo: "Ocular melatonin rhythms in the goldfish" Carassius auratus. Journal of Biological Rhythms.12. 182-192 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] F.J.Sanchez-Vazquez: "Daily cycles in plasma and ocular melatonin in demand-fed sea bass, Dicentrarchus labrax, L." Journal of comparative Physiology B. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Iigo: "Ocular melationin rhythms in a cyprinid teleost, oikawa Zacco platypus, are driven by light-dark cycles." Zoological Science. (in press).

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

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Published: 1999-03-09  

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