伊勢湾,尾鷲湾,大船渡湾におけるGonyaulax属プランクトンによる貝類の毒化〔英文〕

概要

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The occurrence of toxic bivalves was surveyed in several bays in association with Gonyaulax planktons. Warious bivalves, such as short-necked clam and mussel, collected in April and May, 1976, in Ise Bay showed a maximum toxicity of 100 MU/g of whole soft body. The mussel collected in January and February, 1977, in Owase Bay exhibited a maximum toxicity of 70 MU/g of whole soft body. In the former case, a Gonyaulax bloom occurred almost in parallel with the appearance of toxic bivalves, indicating their close association. In the latter case, no bloom was observed. On the other hand, as high a toxicity as 800 MU/g was encountered with the mid-gut gland of scallop collected in May, 1976, in Ofunato Bay where no visible Gonyaulax bloom has so far been observed. The toxicity values of the ovary and adductor muscle of scallop were 45 and 20 MU/g, respectively.
日本水産學會の論文