魚類における放射性核種の蓄積機構に関する研究-III

概要

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In order to investigate the influence of the calcium concentration in the environmental water on the behaviour of strontium and calcium at the branchial absorption of fish, gill perfusion experiment of strontium-89 and calcium-45 was carried out using Japanese eel, Anguilla japonica. The calcium concentrations applied in this experiment were 30mg., 60mg. and 1.90mg. per 1, 000ml of external perfusion medium. The strontium-calcium discrimination factors at the branchial absorption in these calcium concentrations were 0.71±0.06, 0.66±0.02 and 0.73±0.03, respectively. These values obtained resemble roughly to that (0.74±0.02) obtained in the previous experiment using the environmental water containing calcium amount of 100mg./l. Accordingly, it seems that the strontium-calcium discrimination factor in the branchial absorption of fishes is approximately 0.7 and not greatly variable over the wide range of calcium concentration of the environmental water.
公益社団法人日本水産学会の論文