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青菱湖是武汉市西郊湖群中的一个通江小型浅水湖泊,现存水面积约8000亩。由于江湖之间筑有闸门,鱼类洄游受到阻碍。湖中除天然定居鱼类的种群数量比较稳定外,半洄游性的鲢、鳙和草鱼的产量,则随投放人工鱼种多少而波动。1983年5月—1984年10月,对青菱湖进行了水生生物和鱼类的考察分析。调查表明,草食性鱼类的鱼种数量不足是鱼产量波动的基本原因,从而提出引进长江干流的天然鱼种,是达到鱼类增殖目的的主要方法,以使完整的江湖生态系统在渔业上继续发挥作用。
Qingling Lake is a small shallow lake in the western outskirts of Wuhan City, the existing water area of about 8,000 acres. Because of the floodgates built between rivers and lakes, fish migration is hindered. The number of semi-migratory silver carp, bighead carp and grass carp fluctuated with the number of artificial fingerlings, except for the relatively stable population of naturally settled fish in the lake. May 1983 - October 1984, Qingling Lake aquatic organisms and fish inspection and analysis. The survey shows that the lack of species of herbivorous fish is the basic reason for fluctuations in fish production. Therefore, the introduction of natural fish species from the mainstream of the Yangtze River is the main method to achieve the purpose of fish proliferation so that the complete ecosystem of rivers and lakes Continue to play a role.