主として茨城県および青森県沿岸から採集した海産生物中の239,240Puと137Cs濃度〔英文〕

概要

論文の詳細を見る
Several marine biological samples were collected from the Pacific coasts of Ibaraki and Aomori Prefecture in 1987 to 1989, and 239, 240Pu and 137Cs concentrations were measured. A comparison was a lso made between some pelagic and benthic fishes for their radio-nuclide concentration. 239, 240Pu contents of coastal fishes were higher in viscera, and muscle usually showed the lowest value. On the contrary, 137Cs contents were rather higher in muscle. The diffierens of radionuclide concentrations were found among species, but no de-finite regional variation was observed between the Ibaraki and Aomori coasts. The 239, 240Pu concentration level in coastal fishes was higher than that in pelagic ones, and no significant difference was observed between pelagic fishes from warm water masses and cold water masses. On the contrary, 137Cs contents of the pelagic fishes showed clear difference between warm water species and cold water ones. The surface and benthic fishes seemed to show similar concentration levels of radio-nuclides.
日本水産學會の論文