渡良瀬川で採捕された魚類の組織内酵素活性

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The activities of alkaline phosphatase (Al-Pase), acid phosphatase (Acid Pase) and glutamic oxaloacetic transaminase (GOT) were measured using liver, muscle and gill of fishes collected in the Watarase River and the Akiyama River, for examining the usefulness as water quality indices. There has been little effect of human pollution in St. 1 and the water quality of it was the best among the three stations. St. 2 has been polluted with household sewage and industrial waste water, while St. 3 has been polluted with mine drainage and household sewage. Heavy metal (Cu, Zn, Cd and Pb) contents in viscera of fishes collected at St. 3 were the highest among the three stations. When the tissue enzyme activities of Tribolodon hakonensis collected at St. 2 and St. 3 were compared with those at St. 1, activities of Al-Pase and GOT in muscle and Al-Pase and Acid Pase in gill increased markedly. At St. 2 and St. 3, relativel;y low activities of Al-Pase and Acid Pase in gill may be partly due to high concentration of synthetic detergent because of relatively high concentration of methylene blue active substance. On the other hand, those activities of Zacco platypus were not different among the three stations. GOT activity of both species of fishes seems to depend on water temperature. When the fish species is properly selected, it may be possible to use the activities of tissue enzymes of fish as water quality indices.
日本水産學會の論文