用鱼肌核酸指示水体污染的初步研究

选择了4种家鱼作指示生物，用紫外分光光度法测定其白肌中RNA和DNA的含量。结果表明：同种鱼，污染区的RNA含量显著低于对照区，白鲢和鳊鱼白肌中RNA／DNA低于对照区；不同种的鱼，污染区鱼肌核酸比对照区下降的程度有鳊鱼＞白鲢＞鲫鱼和鲤鱼的趋势。鱼肌核酸下降同水体重金属污染有一定联系，RNA是比RNA／DNA更合适的指标，鳊鱼和白鲢是比鲫鱼和鲤鱼更敏感的指示生物。

Study on Nucleic Acids of Fish Muscle as an Index to Water Contamination

Determining the RNA contents and RAN/DNA ratios in four species of fish by means of UV spectrometric technique demonstrated that: (a ) the RNA of fish muscle from polluted water was significantly lower than those from control for 4 kinds of fish, and the RNA/DNA was decreased for only 2 kinds of fish ; (b ) for different species,the reduction of nucleic acids of fish muscle was in a order bream}silver carp>crucian carp and carp. Contaminated water might reduce the RNA content or RAN/DNA ratio of fish muscle, but RNA was more sensitive than RNA/DNA as an index, tile more susceptible indicators were bream and silver carp instead of crucian carp and carp.