白洋淀鱼类组成现状

Present Situation of Fish Stocks in Baiyangdian Lake

目前白洋淀共有鱼类 33种 ,隶属于 7目 1 2科 30属 ,自然鱼类种群呈现低龄、小型化 ,经济鱼类人工养殖业发展较快 ,但应有计划地给予节制。本文对优势种之一白鲦鱼的生物学特性做了重点研究 ,总体情况不如 1 991年。结合近年来调查所得的资料 ,总结得出白洋淀鱼类种群组成的变化及影响其变化的环境因素 ,从而对白洋淀环境的保护与利用、白洋淀的鱼类资源的可持续发展提出建议。

At present there are 33 fish species in Baiyangdian Lake belonging to 7 orders, 11 families and 30 genera. Natural fish populations have shown a trend towards low age and small size. Aquaculture of economically important fish species has made rapid progress and should be conducted under controlled management. A special study of the biological charateristics of Hemiculter leucisculus,one of the dominant fish species, has revealed that the general condition of this species′ population is worse than that of 1991. Combined with data obtained in recent years, we conclude that environmental factors are responsible for the change in makeup of the Lake’s fish populations. On the basis of these conclusions, we make some suggestions for the sustainable development of fish stocks and the protection and utilization of the environment in Baiyangdian Lake.