Changes in fish resources 5 years after implementation of the 10-year fishing ban in the Chishui River,the first river with a complete fishing ban in the Yangtze River Basin

作     者：Fei Liu Zixin Wang Zhijun Xia Jianwei Wang Huanzhang Liu Fei Liu;Zixin Wang;Zhijun Xia;Jianwei Wang;Huanzhang Liu

作者机构：Institute of HydrobiologyChinese Academy of SciencesNo.7 Donghu South RoadWuchang DistrictWuhan 430072People’s Republic of China Dalian Ocean UniversityDalian 116023People’s Republic of China 

出 版 物：《Ecological Processes》 (生态过程（英文）)

年 卷 期：2023年第12卷第1期

页      面：696-715页

核心收录：

学科分类：07[理学] 0713[理学-生态学] 

基　　金：supported by Grants from the National Key Research&Development Program of China(2022FY100400,2022YFB3206905) the National Key Research&Development Program of Yunnan Province(202203AC100001) the China Three Gorges Corporation(BHQ202305) 

主　　题：The Yangtze River Fishing ban The Chishui River Fish resources Biodiversity conservation 

摘      要：Background To rehabilitate the depleted fish resources of the Yangtze River Basin,China,a 10-year fishing ban has been *** national initiative has attracted worldwide *** present study aimed to explore the ecological process and recovery effectiveness of this complete fishing ban in the Chishui River,the first river where the fishing ban was enacted in the Yangtze River *** in fish resources were analyzed based on investigations conducted 5 years before(2012–2016)and 5 years after(2017–2021)the implementation of the fish-ing ban in four reaches along the longitudinal *** A total of 140 fish species,including 127 native and 13 exotic species,were collected during the study *** number of fish species as well as the diversity indices showed no significant temporal ***,11 native species that had disappeared for many years appeared again after the fishing *** occurrence rates of some key protected species,Procypris rabaudi,Acipenser dabryanus,Euchiloglanis davidi and Myxocyprinus asiaticus,increased after the fishing ban,while Coreius guichenoti,Percocypris pingi,Onychostoma angustistomata and Leptobotia rubrilabris showed no obvious *** fish assemblage structure in nearly all reaches(except the headwater)showed significant temporal changes with an increase in the relative abundance of larger body-sized *** population structure of most dominant species improved greatly with the mean standard length and the mean body weight as well as the proportion of larger-sized individuals clearly *** addition,the density of fishes changed dramatically with the catch per unit effort(CPUE)increasing by 140–210%for different study *** The present study confirmed that the complete fishing closure is an effective measure to facilitate fish resources *** results provide valuable references for evaluating the effectiveness of the 10-year fishing ban policy in the entire