水生生物学报2025，Vol.49Issue(5)：1-14,14.DOI:10.7541/2025.2024.0328
禁渔初期长江中游沅水流域鱼类群落结构及其历史变化
FISH COMMUNITY STRUCTURE AND ITS HISTORICAL CHANGES IN THE YUANSHUI RIVER OF MIDDLE REACHES OF THE YANGTZE RIVER DURING EARLY PERIOD OF THE FISHING BAN
摘要
Abstract
In order to understand the structural characteristics and its historical changes in the Yuanshui River,located in middle reaches of the Yangtze River,during early period of the fishing ban,a fish resource survey was conducted at 7 sampling stations between 2022 and 2023 using traditional fishing gear.A total of 120 fish species were collected and identified,which belonged to 9 orders,19 families,and 69 genera.The largest group was Carpiformes,comprising 85 species(70.83％).At the family-level,the most abundant group included 73 species(60.83％).The dominant species were Plagiognathops microlepis,Squalidus argentatus,Aristichthys nobilis,Sinibrama wui,and Cyprinus carpio.In terms of ecological habits,resident species(53.33％),omnivorous(65.00％),and demersal fishes(43.33％)were predominant.Fish diversity indices varied among sampling sites,with greater seasonal variation observed in spring and summer compared to fall and winter.The community similarity and clustering analyses showed that the Yuanshui River fish community could be divided into four groups.Except for Jingzhou and Hongjiang,which exhibited moderate simi-larity,and the rest of the sites showed moderate dissimilarity.Compared with a previous fish survey in the ten years before the fishing ban(2010-2011),the number of indigenous fish species in Yuanshui River increased by 15 species at the beginning of the fishing ban,including the frequent appearance of rare and endemic species such as Ochetobius elongatus,Onychostoma simum,Folifer brevifilis,and Decorus tungtin.In the fish community,the proportion of small-sized fish decreased and the proportion of the medium-and large-sized fish,both in terms of number and weight,increased.Additionally,the average weight of some common species showed a significant rise compared to pre-ban levels.The results of this survey suggest that the effect of the ten-year fishing ban in Yuanshui River are becoming apparent.However,there remains a gap when compared to fish resources from the 1970s and 1980s,and the impact of hydroelectricity developments along the Yuanshui River and other human activities still exist.This study provides a reference for the subsequent fishing ban,fish stocking and releasing programs,and fishery management efforts in Yuanshui River and Yangtze River Basin.关键词
十年禁渔初期/沅水流域/鱼类资源/多样性指数/群落结构Key words
Early stage of the ten-year fishing ban/Yuanshui River/Fish resources/Diversity index/Community struc-ture分类
农业科技引用本文复制引用
张棠斯,刘良国,罗丛强,谢晓,孙远东..禁渔初期长江中游沅水流域鱼类群落结构及其历史变化[J].水生生物学报,2025,49(5):1-14,14.基金项目
国家重点研发计划(2022YFD2400102) （2022YFD2400102）
国家自然科学基金(31572619)资助[Supported by the National Key R & D Program of China(2022YFD2400102) （31572619）
the National Natural Science Foundation of China(31572619)] （31572619）
