In order to investigate the status of fish resources in Weixin section of the rare fish national nature reserve in the upper reaches of the Yangtze River,the methods of sampling,visiting and searching data were adopted in 2021,a total of 1331 fish were caught in the investigation,and the number of fish species increased gradually as the river extended downstream According to the field investigation,there are 13 species of fishes in Weixin section of the reserve,belonging to 2 orders,5 families and 13 genera.According to the IRI analysis,Acrossocheilus yunnanensis,Schizothorax grahami and Zacco platypus are the dominant species.The diversity index(H')was 1.89,richness index(D)was 2.16,and the evenness index(J)was 0.43,which indicated that the total fish resources in weixin section were relatively poor and the distribution of population structure was relatively uniform,the community structure is relatively stable.At the same time,according to the distribution characteristics of fish resources,it is found that there are differences in the amount of fish resources in the main stream and tributaries.
关键词
长江上游/自然保护区/威信段/鱼类资源
Key words
upper reaches of the Yangtze River/nature reserve/Weixin section/fish resources
维普
万方数据