怀柔水库的鱼类资源比较丰富,也是北京市淡水渔业重要的产地之一。该库平均水深约6米,养鱼水面7800亩,历年平均产量约10万斤左右。根据北京市农业和自然资源区划调查的要求,为渔业区划和合理利用怀柔水库的鱼类资源提供依据,我们从1980·10—1982·10月对怀柔水库的鱼类资源进行了初步的调查研究,现将调查研究的结果整理报告如下: 一怀柔水库鱼类的区系组成 Huairou Reservoir is rich in fish resources and is also one of the important producing areas for freshwater fisheries in Beijing. The average depth of the library is about 6 meters, 7,800 acres of fish water surface, the average annual output of about 100,000 kg. According to the requirements of the investigation of Beijing Municipality on Agriculture and Natural Resources Zoning, this paper provides the basis for the zoning and rational utilization of fish resources in Huairou Reservoir. From January 1980 to October 1982, we carried out a preliminary investigation on the fish resources in Huairou Reservoir The results of the investigation and study are summarized as follows: a Huairou reservoir fauna composition