水质污染对京杭大运河(常州市段)鱼类资源的影响

1984—1985年,我们对京杭大运河(常州市段)鱼类资源做了调查研究,发现该段运河水质污染严重,对鱼类资源影响极大,概括起来主要有如下几方面:1、鱼的种类变少,先后只采到27种,仅占太湖流域的鱼类种数26、73％;2、鱼的个体数量变少,在两年里总共只采到354尾标本,平均每个点每次只采到4、8尾,已不能成为渔业捕捞对象,资源已被破坏殆尽;3、除个别耐污染的种类外,都不能长期生存下去,多是一些个体小的的低龄鱼;4、很多个体不仅体色变深,而且在形态上也出现各种畸形现象。因此必须引起各方面的注意,迅速采取各种有效措施,使这一具有历史意义的大运河仍能保持一个良好的生态环境,尽快恢复该段运河内的鱼类资源。

THE INFLUENCE OF THE CONTAMINATION OF WATER ON THE FISH STOCK IN THE JING-HANG GRAND CANAL ( THE SECTION OF CHANGZHOU )

In 1984 and 1985 We conducted research on the fish stock in the Jing-Hang Grand Canal (the section of Changzhou) and discovered that it had been reduced with the contamination of water in this canal. For example,its species are very few in number, only 27 of them having been collected; the number of individual fishes is becoming less with only 354 specimens in totality; the body of fishes has become smaller and smaller with each passing year; and many bodies are congenital malformations.