大船渡湾におけるProtogonyaulax出現量とホタテガイの毒性

緒方 武比古; 児玉 正昭; 福代 康夫; 井上 剛司; 神谷 久男; 松浦 文雄; 関口 勝司; 渡辺 敞嗣

doi:10.2331/suisan.48.563

The Occurrence of Protogonyaulax spp. in Ofunato Bay, in Association with the Toxification of the Scallop Patinopecten yessoensis

Takehiko OGATA, Masaaki KODAMA, Yasuwo FUKUYO, Takeshi INOUE, Hisao KAMIYA, Fumio MATSUURA, Katsushi SEKIGUCHI, Shoji WATANABE

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JOURNAL FREE ACCESS

1982 Volume 48 Issue 4 Pages 563-566

DOI https://doi.org/10.2331/suisan.48.563

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Abstract

The abundance of Protogonyaulax and the toxicity of the scallop Patinopecten yessoensis were monitored at two stations in Ofunato Bay, Iwate Prefecture. In spring and summer, P. tamarensis appeared and in autumn, P. catenella. The ratio of the toxicity level of scallop to the number of Protogonyaulax plankton cells varied even in the same species. The toxin, once accumulated in the scallop, was not easily eliminated. The toxicity level in the shellfish did not markedly increase when the Protogonyaulax cell density reached the maximum. The maximum level was attained about one week later, when most of the Protogonyaulax had already disappeared.

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