Species Composition and Diversity of Fish in Renhuai City,Guizhou Province
In order to clarify the fish diversity status in Renhuai City,Guizhou Province,we carried out 6 comprehensive field investigations on the fish resources of 10 major rivers from 2022 to 2023.The results showed that there existed 81 species(subspecies)of fishes in Renhuai City,belonged to 7 orders,19 families,and 63 genera.Among those,there were 10 speciesof exotic fishes(subspecies or hybrid species),5 species of national key protected wild fish species,10 species of China's red list of biodiversity,and 17 species of the rare and endemic fishes in the upper reaches of the Yangtze River,and with an absolute advantage by Cypriniformes and Cyprinidae in native fishes.The Renhuai's reach of the Chishui River had the richest fish species and the highest level of diversity as compared to other branches based on the evaluation of species richness and G-F index.In addition,rare and endemic fishes were mainly distributed in the main stream of the Chishui River,while exotic fishes were distributed in local sections of some rivers.Comprehensive analysis showed that the richness and diversity of fish species in the Renhuai's reach of the Chishui River were high.There were significant differences in the distribution of fish diversity among different rivers,which caused by factors such as habitat,water quality,river dams,and human interference and so on.Among them,artificial breeding escape and introduction are the main drivers of the distribution of exotic fish species.The research results had enriched the background data of fish resources in Renhuai City,and provided scientific basis for the conservation diversity and resource management of fish species.
万方数据
维普
