滦河水系的鱼类种群与分布

滦河水系共发现有28种鱼,以鲤科种类占优势。细鳞鲑为本河系的稀有鲑科种,仅发现于北纬41°34′以北的小滦河。

ON THE DISTRIBUT ION AND SPECIES POPULATION OF FISHES IN LUANHE RIVER

There are twenty eight species of fishes found in Luanhe River, Among them, Cyprinidae show a dominant part in fish fauna. The features of faunal composition in Luanhe River is the same as in the He-Hai subregion. The carp family, loach family and catfish family are all widespread kinds in Luanhe River except for Xiao-Luanhe River. Only two species have been collected in the upper reaches of the Xiao-Luanhe River, They are minnow ( Phoxinus oxycephalus)and tiny scales salmon ( Brachymystax lenok ) . The superior species the last one.