西溪湿地鱼类资源与保护对策

摘要

2016年5月和10月对西溪湿地的鱼类资源进行调查,对湿地鱼类组成、种类时空分布和优势种进行分析.共采集鱼类38种,隶属6目12科36属,其中鲤科鱼类种类最多,占总种数的63.16％,其他各科鱼类为2种或1种,生物多样性偏低,鱼类资源结构不复杂、资源量较少,且存在中小型化的现象.5月和10月调查鲤科鱼类种数分别占58.62％和77.78％;湿地内的鲫和中华乌塘鳢为优势种类.湿地生境的改变可能是造成鱼类资源下降的主要原因,针对鱼类资源保护中存在的问题,提出了鱼类资源保护对策.%An investigation was conducted on the fish resources at 6 sampling sections in Xixi Wetland in May and October 2016,species composition,dominant species,temporal and spatial distribution of the fishes were analyzed.A total of 38 species were collected,which belonged to 6 orders,12 families and 36 genera,and Cyprinidae had the largest number of species,accounting for 63.16％ of the total number of species.There were 2 or 1 species belonging to other families,biological diversity was low,the structure of fish resources was not complex,the quantity of resources was small and tended to become medium and small in size.The two investigations conducted in May and October revealed that the number of Cyprinid fish species accounted for 58.62％ and 77.78％,respectively.The dominant species were Carassius auratus and Bostrichthys sinensis in the wetlands.The change of wetland habitat may be the main cause for the decline of fish resources.According to the problems existing in the protection of fish resource,strategies and measures were proposed to improve the situation.