渭河流域周至段鱼类多样性与栖息环境调查

摘要

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 w as carried outon fish recourses and theirhabitatenvironm entofthe ZhouzhiSection atthe W eihe R iverB asin from June 19 to 30, 2016. The results show that in this area, there tw o classes (O steichthyes and A ctinopterygii), 4 catalogues (C ypriniform es,Perciform es,Phractocephalus hem ioliopterus and Salm oniform es),6 fam ilies (C yprinidae,G obiidae,B agridae,C o-bitidae, Salm onidae and Siluridae), 17 categories and 18 species. Thereof, advantageous species include Phoxinus lagowskii and Hemiculter leucisculus;com m on species is Homatula variegate.The abundance status offish recourses is significantly related to w ater quality.B iodiversity is the m ostabundantatthe interchange betw een W eihe R iverand H eihe R iver.The species are evenly distributed in various areas,butthe num berofcom m unities varies dram atically.In general,the com position offish categories atZhouzhiSection ofthe W eihe R iverB asin isrelatively sim ple.The fish resourcestend to reduce and the richnessdegree isnothigh.