长江是我国的第一大河 ,水系支流众多 ,流域面积广阔 ,鱼类资源极为丰富[1]。长江盛产青鱼、草鱼、鲢、鳙、铜鱼、圆口铜鱼、长吻、鲶、黄颡鱼、鲤、鲫、鲥、刀鲚、风鲚、鳗鲡等许多名贵经济鱼类 ,是著名的四大家鱼、鳗鲡等许多经济鱼类的原种基地 ,其品质是我国所有水系中最 The Yangtze River is the largest river in our country. There are many tributaries of the river system. The catchment area is vast and the fish resources are extremely rich [1]. The Yangtze River is rich in herring, grass carp, silver carp, pomfret, bronze fish, round-necked copper fish, catfish, catfish, yellow catfish, carp, crucian carp, pomfret, knife 鲚, wind 鲚, eel and many other economically valuable fish, Of the four major fish, eel and many other economic fish species base, the quality of all our water system