陕西黄陵沮河上游鱼类资源调查及多样性分析

Fish resources and their diversities in upper reaches of Ju River in Huangling of Shaanxi

为掌握渭河支流-沮河的渔业资源现状,保护珍稀鱼类资源,本研究组于2012年8月采用样方法对陕西黄陵沮河上游国家级水产种质资源保护区的鱼类资源进行调查和多样性分析。本次调查共收集鱼类标本16种,分属2目3科16属。其中以鲤科鱼类为主,共12种,占鱼类品种75.00%,鳅科3种,占18.75%,鲇科鱼类1种,占6.25%。结果表明底栖鱼类最多,占总种类数的56.25%。从食性上分析,杂食性鱼类最多,共12种,占75.00%;肉食性和植食性鱼类各2种,分别占12.50%。淡水定居型温水鱼类较多,也存在少量冷水鱼类。

In order to understand the fishery resources and protect the endangered rare fish species in Ju River, a tributary of Wei River, an investigation was carried out in upper reaches in Ju River Shaanxi Huangling aquatic resources reservoir in August 2012, by quadrat sampling method. Sixteen species belonging to 16 genus, 3 families and 2 orders were collected. Cypriniformes was the dominant order with the most members in this area, accounting for 75.00% of the captured species, Cobitidae and Catfish accounted for 18.75% and 6.25%, respectively. The results showed that benthic fish accounted for 56.25% of the total species. According to the feeding habits, omnivorous fish, a total of 12 species, were accounting for 75.00% of the species; carnivorous and herbivorous fish each had two species, accounting for 12.50%. From the analysis of required water temperature, besides a small amount of cold water fish species, the species were mainly in fresh water-based settled environment.