信江是江西省的第二大河流。作为鄱阳湖的重要支流，信江有着丰富的鱼类物种多样性及独特的区系组成，是中国动物地理区划中的关键区域。信江还是江西省重要的淡水渔业产区。然而，信江水系鱼类物种多样性仍存在较大的问题，其群落结构的研究尚未见相关报道。本项目拟通过对信江鱼类的调查，明确其鱼类区系组成及渔业资源。在此基础上，结合二十世纪90年代初期的鱼类区系调查资料, 分析信江鱼类多样性与群落结构的演变趋势，探讨全球气候变化和人类活动的影响程度，为水环境保护和水资源管理提供智力支持；同时，根据采样调查的鱼类和河流环境因子分析鱼类群落与环境因子的相互关系，揭示影响鱼类分布的主要环境因子，预测水利水电开发对信江鱼类区系结构的影响，提出保护措施；此外，采用鱼类生物完整性指数(F-IBI)来评价信江水生态健康，为信江水资源的管理提供科学依据。

The Xin-Jiang, the second largest river in Jiangxi Province, is a tributary flowing into the Poyang Lake system connected to the Yangtze River basin. It, with a high diversity of freshwater fish species and an uniqueness of faunistic component, is a key area of zoogeographic division in China. It is also important area of freshwater fisheries in Jiangxi Province. Unfortunately, the fish diversity of this river is still not well understood, and little is known about the community structure of its fauna. This project will try to conduct a field fish survey into this river, with the aim to have a better understanding of its fish fauna and fishery resource. Comparison of the database of this survey will be made with historical record to unveil the tend of the shift in the species composition of this river during the past 20 or more years,and then illuminate the degree to which the the global climate and human activities have impacts on this shift. This will provide intellectual support for biodiversity conservation and water resources management of the river. The project also attempts to investigate the fish community structure of this river and its relationship environmental factors in order to determine main factors affecting freshwater fish distribution in this river. Based on these results, possible impacts on the fish fauna caused by construction of hydroelectric dam across the river will be predicted, and the conservation measure used to mitigate the adverse influence will be provided.Moreover, the fish-based IBI is used to assess the aquatic ecological health of this river in order to provide basic information for managemant of water resource.