【摘要】 为了解冯家山水库引入大银鱼（Protosalanx hyalocranius）对库区土著鱼类资源的影响，分别于2023年4、7、12月，对冯家山水库库区和坝下河流土著鱼类组成进行了调查。结果表明，冯家山水库库区共发现土著鱼类15种，隶属于3目6科15属，其中主要种为大鳍刺鳑鲏（Acanthorhodeus macropterus）、中华鳑鲏（Roodeus sinensis）和麦穗鱼（Pseudorasbora parva），少见种鱼类包括■（Hemiculter leucisculus）、马口鱼（Opsariichthys bidens）等6种。冯家山水库坝下共发现土著鱼类13种，隶属于2目4科11属，拉氏■（Phoxinus lagowskii）为坝下唯一优势种。库区和坝下均未发现珍稀濒危鱼类，两处水域的鱼类群落相似性系数为0.5。指出，冯家山水库库区和坝下鱼类群落组成差异明显，引入大银鱼对库区土著鱼类资源造成一定影响，但库区鱼类群落结构相对稳定。更多还原

【Abstract】 To understand the impact of introducing Protosalanx hyalocranius into Fengjia Reservoir on the native fish resources in the reservoir area, the composition of native fish in Fengjiashan Reservoir and the river below the dam was investigated in April, July and December 2023. The results show that a total of 15 native species were identified in the reservoir, which belonged to 3 order, 6 families and 15 genus. The subdominant species in the reservoir are Acanthorhodeus macropterus, Roodeus sinensis, Pseudorasbora parva, and 6 rare species were found, including Hemiculter leucisculus, and Opsariichthys bidens. Meanwhile, a total of 13 native fish species were found in the river under the dam, which belonging to 2 orders, 4 families and 11 genera. Phoxinus lagowskii is the only dominant species under the dam. No endangered fish were found in the reservoir area and the river under the dam. Moreover, the index of dissimilarity(Cs) of the fish community between the two waters were 0.5. It is pointed out that the composition of fish community in the Fengjiashan Reservoir and under the dam is different, the transplantation of P. hyalocranius has some effect on the indigenous fish resources in the reservoir area. However, the diversity index showed a relatively stable fish community structure in the reservoir.更多还原