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1995 Fiscal Year Final Research Report Summary

Studies on Body Color Expression of Cultured Black Tiger, Prawn

Research Project

Project/Area Number 06454101
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Fisheries chemistry
Research InstitutionThe University of Tokyo

Principal Investigator

YAMAGUCHI Katsumi  Univ.of Tokyo.Fac.of Agriculture, Professor, 農学部, 教授 (50011896)

Co-Investigator(Kenkyū-buntansha) OKADA Shigeru  Univ.of Tokyo.Fac.of Agriculture, Assistant Professor, 農学部, 助手 (00224014)
Project Period (FY) 1994 – 1995
KeywordsBlack Tiger Prawn / Carotenoid / Astaxanthin / Carotenoprotein
Research Abstract

Carotenoids and carotenoproteins in the exoskeleton and the muscular epithleium of cultured black tiger prawn Penaeus monodon were analyzed to establish a strategy to improve their body color. First, carotenoid content and composition in the exoskeleton of the prawns exhibiting different body colors were determined. A consistency was observed between the depth of body color and the carotenoid content of 2.3-33.1mg/100g in the exoskeleton. The major carotenoid, astaxanthin, existed in three forms, namely diester, monoester, and free ones. Second, a blue carotenoprotein of 120kDa was purified from the exoskeleton. Another of 21.4kDa was also isolated from the muscular epithelium with a collagenase solution. Finally, carotenoids in both fractions were analyzed and compared between dark gray and blue prawns. A blue carotenoprotein fraction was liberated from the muscular epithelium by extraction with a collagenase solution, leaving another carotenoid fraction in the tissue. The main carotenoid in the carotenoprotein fraction was free astaxanthin, of which content showed no significant difference between the two prawn groups. The muscular epithelium after removal of blue carotenoprotein turned red owing to the remaining carotenoids which were composed largely of astaxanthin esters. The total content of the remaining red carotenoids was about six-fold higher in the dark gray than blue group. Thus the different body color of cultured black tiger prawns is suggested to be due to the varied composition of the blue carotenoprotein and red carotenoid fractions in the muscular epithelium.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Shigeru Okada: "Carotenoid Composition in the Exoskeleton of Commercial Black Tiger Prawn" Fisheries Science. 60(2). 213-215 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.A.Nur-E-Borhan: "Carotenoprotein from the Exoskeleton and the Muscular Epithelium of the Black Tiger Prawn Penaevs monodon" Fisheries Science. 61(2). 337-343 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shigeru Okada: "Changes in Body Color Appearance of the Black Tiger Prawn Penaevs monodon by the Varied Composition of Caroteroids Soluble as Caroter-protein and Remainig Insoluble after Collagenase Treatment for the Mvscular" Fisheries Science. 61(6). 964-967 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shigeru Okada: "Carotenoid Composition in the Exoskeleton of Commercial Black Tiger Prawn" Fisheries Sciepce. 60(2). 213-215 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.A.Nur-E-Borhan: "Carotenoproteins from the Exoskeleton and the Muscular Epithelium of the Black Tiger Prawn Penaeus monodon" Fisheries Science. 61(2). 337-343 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shigeru Okada: "Changes in Body Color Appearance of the Black Tiger Prawn Penaeus monodon by the Varied Composition of Carotenoids Soluble as Carotenoprotein and Remaining Insoluble after Collagenase Treatment for the Nuscular Epithelium" Fisheries Science. 61(6). 964-967 (1995)

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

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Published: 1997-03-04  

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