红水河干流梯级运行后鱼类资源调查

摘要

Surveys on the fish resources in Longtan reservoir, Yantan reservoir, Dahua reservoir, Bailongtan reservoir, Letan reservoir and Qiaogong reservoir and major tributaries of Hongshui River were conducted in June and November 2009. A total of 144 fish species which belonged to 10 orders and 23 families and 93 genera were found.Cypriniformes included 66 genera and 100 species accounting for 69.4% of species; Perciformes included 11 genera and 18 species accounting for 12.5% of species; Siluriformes included 9 genera and 18 species accounting for 12.5% of species; Anguilliformes includ-ed 1 genera and 2 species; There was only 1 genus and 1 species in Clupeiformes, Salmoniformes, Cyprinodontiformes, Characiformes, Synbgranchiformes and Tetraodontiformes.From the investigation results, fish species decreased signifi-cantly and small fishes were dominant in quantity.%于2009年6月和11月对红水河干流龙滩水库、岩滩水库、大化水库、百龙滩水库、乐滩水库、桥巩水库进行了鱼类资源调查。结果显示：调查的鱼类144种，分属10目23科93属，其中鲤形目66 属100种，占种数的69．4％；鲈形目11 属18种，占种数的12．5％；鲇形目同为18种，分 9 属，亦占种数的12．5％；其余鳗鲡目1属2种，鲱形目、鲑形目、鳉形目、脂鲤目、合鳃鱼目、鲀形目等6目均为1 属1 种。本次调查结果表明：红水河干流鱼类种类明显减少，渔获物中小型鱼类数量占优势。