长江是我国第一大河，也是亚洲第一大河，世界第三大河，地理位置优越。长江水系支流众多，径流量大。流域面积辽阔，通河、通湖、通水库。长江水域面积约占全国淡水面积５０％。长江水域具有饵料丰富、生物种类繁多等得天独厚的条件，构成了渔业资源赖以生长、繁衍、生息所需 The Yangtze River is the largest river in our country and also the largest river in Asia and the third largest river in the world. There are many tributaries in the Yangtze River and large runoffs. Watershed area is vast, Tonghe, Tonghu, reservoir. The Yangtze River water area accounts for about 50% of the national freshwater area. The Yangtze River is rich in food, biological diversity and other unique conditions, constitute the fisheries resources to grow, multiply, and need to live