鸭绿江下游（丹东段）冬春季鱼类种类组成及区系特征初步研究

为补充和完善鸭绿江下游鱼类资源状况的基础资料，了解近年调查区域的鱼类组成特征，采用定性与定量相结合的方法，通过实地现场调查与渔获信息采集的方式，于2011年11月至2012年5月对鸭绿江下游（丹东段）的鱼类种类组成及其区系特征作了初步分析，结果表明：调查区域发现鱼类33种，其中鲤形目最多（12种），鲈形目次之（8种）；鱼类区系组成较为复杂，土著鱼类占优势，温水性鱼类占优势，喜稳水或缓流水的鱼类占优势；鱼类区系在洄游习性、适温性和摄食习性上表现为不同的生态类型。鸭绿江下游丹东河段鱼类群落表现为河口鱼类群落类型，部分物种种群数量急剧减少、迁徙或者消失，鱼类种质资源较为珍贵，建议进一步加强鸭绿江下游的生态环境保护，注意水质污染控制。

The character of fish fauna and fish species composition in winter and spring in the lower reach (Dandong section) of Yalu River

For supplying and perfecting the basic data, recognizing the characteristics of fish composition in the lower reach of Yalu River in recent years, through qualitative （field survey） and quantitative （information collection of fish catch） methods, fish species composition and fish fauna in the lower reach of ~alu River were preliminary studied from November in 2011 to May in 2012. The results showed that： a total of 33 species were collected, the most species-rich orders were Cypriniformes （12 species） and Perciformes （8 species）. The composition of fish fauna was relatively complex, native fish, temperate water fish, and fish lived in a steady water or the slow water were dominant; the fish in the lower reach of Yalu River belong to different ecological types in migration, water temperature tolerance and feeding habit. The fish community type in Dandong reach of Yalu River was the type of eatuary fishery community, part of fish species drastically decreased in population number, migrated, or disappeared. The fish germplasm resources were precious, so it was necessary to further strengthen the protection of the ecological environment, pay attention to water pollution in the lower reach of Yalu River.