Estimating the threshold amount of adductor muscle arginine phosphate content required for recovery of vitality in the scallop <i>Mizuhopecten yessoensis</i>

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  • TAKEDA TADAAKI
    Hokkaido Research Organization Central Fisheries Institute Chair of Marine Food Science and Technology, Graduate School of Fisheries Sciences, Hokkaido University
  • SAKURAI IZUMI
    Department of Marine Biology and Sciences, Tokai University
  • MAEKAWA KIMIHIKO
    Lake Saroma Fisheries and Aquaculture Co-operation Organization
  • NOZAWA HISANORI
    Laboratory of Marine Food Science and Technology, Faculty of Fisheries Sciences, Hokkaido University

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Other Title
  • ホタテガイ <i>Mizuhopecten yessoensis</i> の活力回復に必要な閉殻筋アルギニンリン酸含量の閾値推定
  • ホタテガイMizuhopecten yessoensisの活力回復に必要な閉殻筋アルギニンリン酸含量の閾値推定
  • ホタテガイ Mizuhopecten yessoensis ノ カツリョク カイフク ニ ヒツヨウ ナ ヘイカクキン アルギニンリンサン ガンリョウ ノ シキイチ スイテイ

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Abstract

  The Japanese scallop Mizuhopecten yessoensis, which is a major fisheries resource in Japan, is farmed in coastal areas such as Lake Saroma in Hokkaido. Recently, mass die-offs of cultured Japanese scallops have been frequently observed at Lake Saroma. Our previous results suggested that arginine phosphate concentration in the adductor muscle can be a good predictor of scallop die-off. However, when Japanese scallops are reared in a stressful environment such as high water temperature, low salinity, or anoxia and then returned to their normal rearing environment, some individuals have been found to recover, while others die. This study aimed to determine whether arginine phosphate may be an indicator for predicting which individuals recover and which die. The results suggested that the scallops would die without recovering when arginine phosphate levels decreased to approximately 5 μmol/g or lower, even if they were returned to the normal rearing environment.<br>

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