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长江上游源远流长，支流众多，水量充沛，水流湍急。干流从河源至宜昌长４５０４千米，天然落差５３００余米。长江上游控制流域面积１００万平方公里，地势变化很大，气候差异显著，形成了多种多样的生态环境，孕育了适应于当地生态环境的丰富的淡水渔业资源。但是由于人类的
The upper reaches of the Yangtze River has a long history, many tributaries, abundant water, fast-flowing. The main stream from Heyuan to Yichang 4504 km long, the natural drop of 5300 meters. The control basin in the upper reaches of the Yangtze River covers an area of 1 million square kilometers with great changes in the terrain and significant differences in climate, forming a variety of ecological environments and breeding abundant freshwater fisheries resources that are adapted to the local ecological environment. But because of humanity