渭河流域周至段鱼类多样性与栖息环境调查

A Research About Fish Recourses and their Habitat Environment of the Zhouzhi Section at the Weihe River Basin

2016年6月19日~30日对渭河流域周至段鱼类资源与其栖息环境进行调查研究。结果表明:该地区有鱼类有2纲(硬骨鱼纲和辐鳍鱼纲)4目(鲤形目、鲈形目、鲶形目和鲑形目)6科(鲤科、虾虎鱼科、鲿科、鳅科、鲑科和鲶科)17属18种,其中优势种为拉氏鱥Phoxinus lagowskii与鲦Hemiculter leucisculus;常见种为红尾荷马条鳅Homatula variegata。鱼类资源多度状况与水质差异显著相关,在渭河与黑河交汇处生物多样性最丰富,各样区种类分布较为平均,但群落数量差异较大。总体而言,渭河流域周至段鱼类组成较为简单,鱼类资源呈下降的趋势,丰富性程度不高。

A research was carried out on fish recourses and their habitat environment of the Zhouzhi Section at the Weihe River Basin from June 19 to 30, 2016. The results show that in this area, there two classes （Osteichthyes and Actinopterygii）, 4 catalogues （Cypriniformes, Perciformes, Phractocephalus hemioliopterus and Salmoniformes）, 6 families （Cyprinidae, Gobiidae, Bagridae, Cobitidae, Salmonidae and Siluridae）, 17 categories and 18 species. Thereof, advantageous species include Phoxinus lagowskii and Hemiculter leucisculus; common species is Homatula variegate. The abundance status offish recourses is significantly related to water quality. Biodiversity is the most abundant at the interchange between Weihe River and Heihe River. The species are evenly distributed in various areas, but the number of communities varies dramatically. In general, the composition of fish categories at Zhouzhi Section of the Weihe River Basin is relatively simple. The fish resources tend to reduce and the richness degree is not high.