澱粉工場廃水が湧別川・渚滑川に, ビート工場廃水が網走川の底生動物におよぼす影響について

概要

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1. The Yubetsu and Shokotsu Rivers, near Abashiri in Hokkaido, were investigated in November and December 1965,and in May 1966 with regard to the influence of starch factory effluents on stream organisms. 2. The biotic indices according to the Beck-Tsuda method are shown in Fig. 4,Table 3 and Table 5. 3. In both rivers, the starch factory effluents are not very serious but give bad effect on the stream organisms. 4. The Abashiri River, Hokkaido, was investigated in Novemer and December 1965 and in May 1966 with regard to the influence of industrial wastes from the beet factory upon the bottom fauna. 5. The biotic index according to the Beck-Tsuda are shown in Table 7.
1967-08-01