水質汚濁斃死魚の死因判定法について-13-カドミウムについて-1-

概要

論文の詳細を見る
The toxicity of several cadmic solutions to fishes and cadmium content in fish bodies killed with these solutions were investigated in this study.The 48h TLm values for goldfishes for CdCl2, Cd(CN)2, and Cd-plating solution III were 5 to o ppm Cd and those for Cd-plating solutions I and II were approximately 0.3ppm Cd. Thus, the latter is more toxic than the former (Table 3). These latter solutions had toxicity greater than that indicated by CN concentration in them. Greater fish mortality and cadmium content in fish bodies were observed for non-feeding group than for feeding group, in CdCl2 solution containing 0.1ppm of Cd which is considered to be at the semi-acute level (Fig. 3 and 4). Cadmium concentration was higher in kidneys and hepatopancreas among the various organs of fishes killed with Cd; it was higher in hepatopancreas than in kidneys for the feeding group and vice versa for the non-feeding group. The analysis of whole fish bodies revealed large cadmium content for the fishes killed with CdCI2, Cd(CN)2, and Cd-plating solution III (Tables 1, 4, and 7); for the fishes killed with Cd-plating solutions I and II, high cadmium content was observed only in the case of larger cadmium concentration in those solutions.
日本水産學會の論文