陕西紫柏山国家级自然保护区鱼类多样性及资源现状

Fishes Diversity and Resource Status in Shaanxi Zibaishan National Nature Reserve

2019年7—8月,对陕西紫柏山国家自然保护区的鱼类资源现状进行了调查。结果显示:保护区有鱼类2目4科18种,其中鲤形目CYPRINIFORMES有16种,鲤科和鳅科均为8种,分别占总数的44.44%,保护区的优势种是拉氏大吻■Rhynchocypris lagowskii,稀有种占保护区物种的27.78%,许多稀有种仅发现1尾。保护区鱼类物种在嘉陵江与温江河交汇区域分布最丰富,海拔梯度900~1 000 m物种分布最多,在1 200 m之后,物种数急剧下降。保护区鱼类组成相对简单,多样性较低,群落结构脆弱,渔获物组成基本以小型化、低龄化为主,应进一步加强对该区域的保护管理。

From July to August 2019, the status of fish resources in Zibaishan National Nature Reserve in Shaanxi was investigated.The results show that there are 18 species of two orders, 4 families in the protected area, among which there are 16 species of CYPRINIFORMES, 8 species of both Cyprinidae and Polygonaceae, accounting for 44.44% of the total. Rhynchocypris lagowskii, rare species accounted for 27.78% of the species in the reserve, many rare species only found one tail. The fish species in the protected area are most abundant in the area where the Jialing River and Wenjiang River meet. The altitude gradient is 900 ~ 1,000 m. The species distribution is the largest. After 1,200 m, the species number drops sharply. The composition of fish in the protected area is relatively simple, the diversity is low, and the community structure is fragile. The composition of catches is small and young, and the protection and management of the area should be further strengthen.