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于2014年秋季在黄河兰州市区段设置7个采样断面对鱼类资源进行了调查。结果显示:调查的鱼类有13种,隶属于4目5科。其中鲤科鱼类占优势,有9种,占总种类数的69.23%。鲤科鱼类中鲦数量最多,占总渔获物数量的28.41%,鲤鱼的体重最大,平均为312g/尾,占总渔获物重量的83.78%。黄河兰州市区段鱼类区系具有5种区系复合体特征。本次调查结果表明黄河兰州市区段鱼类种类明显减少,渔获物中小型鱼类数量占很大优势。建议加大流域生态环境保护力度,适时进行经济鱼类的增殖放流。
In the fall of 2014, seven sampling sections were set up in the Lanzhou section of the Yellow River to investigate fish stocks. The results showed that there were 13 species of fish under investigation, belonging to 4 orders and 5 families. Among them, Cyprinidae predominated, with 9 species accounting for 69.23% of the total species. The largest number of carps in the crabs, accounting for 28.41% of the total catch, carps the largest weight, an average of 312g / tail, accounting for 83.78% of the total catch weight. The fish fauna in the Lanzhou section of the Yellow River has five fauna complexes. The survey results show that the species of fish in the Lanzhou section of the Yellow River have obviously decreased, and the number of small and medium-sized fish caught has a great advantage. It is suggested to increase the protection of ecological environment in the river basin and to promote the release of economic fish timely.