红水河龙滩水库鱼类资源调查

于2009年6月和11月对红水河龙滩水库鱼类资源进行了调查,共采集到鱼类90种,分属7目、18科、69属;其中,鲤形目(Cypriniformes)51属、64种,占总种数的71.1%;鲇形目(Siluriformes)8属、13种,占14.4%;鲈形目(Perciformes)6属、9种,占10.0%;鳗鲡目(Anguilliformes)、鲑形目(Salmoniformes)、鳉形目(Cyprinodontiformes)、合鳃目(Synbgranchiformes)均为1属、1种。结果表明,龙滩水库建设导致水域生态环境的改变是鱼类种类组成及其群落结构变化的主要因素;渔获物分析结果显示,龙滩水库鱼类资源呈现低龄化和小型化的趋势。

Investigation of Fish Resources in Longtan Reservoir of Hongshuihe River

Detailed data and corresponding analysis on fish resources in Longtan Reservoir of Hongshuihe River were present in this paper based on surveys conducted in this area in June and November 2009. A total of 90 fish species were found, which can be classified into 69 genera, 18 families, 7 orders in taxonomy. The species composition is as follows: Cypriniformes, 51 genera and 64 species, accounting for 71.1% of species; Perciformes, 8 genera and 13 species, accounting for 14.4% of species; Siluriformes, 6 genera and 9 species, accounting for 10% of species; Anguilliformes, Salmoniformes, Cyprinodontiformes and Synbgranchiformes, 1 genus and 1 species respectively. The survey results demonstrated that the construction of Longtan Reservoir has caused local hydroecological variation, which leads to the changes of fish species composition and Community Structure. In addition, the analysis of main catches also indicated that fish resources of Longtan Reservoir represent a tendency of younger age and smaller size.