中国水产科学2025，Vol.32Issue(9)：1312-1326,15.DOI:10.12264/JFSC2025-0008
禁渔初期长江上游典型江段鱼类时空分布特征
Characteristics of fish spatio-temporal distribution in typical sections of upper Yangtze River at the initial stage of fishing ban
摘要
Abstract
To understand the spatio-temporal distribution characteristics of fish resources,hydroacoustic and catch surveys were conducted in the Jiangjin,Zhongxian,and Zigui sections of the upper Yangtze River during the initial period of the fishing ban from May to December 2023.The results demonstrated that,temporal distribution of the fish densities in the Jiangjin section during low-water and high-water periods were(9.17±2.28)and(13.32±2.44)individuals(ind.)/1000 m³,respectively,with average target strengths of(-55.69±3.38)and(-55.21±3.13)dB.In the Zhongxian section,the fish densities during low-water and high-water periods were(6.38±1.27)and(1.22±0.26)ind./1000 m³,respectively,with average target strengths of(-53.99±4.25)and(-56.66±3.23)dB.In the Zigui section,the fish densities during low-water and high-water periods were(0.45±0.19)and(0.32±0.07)ind./1000 m³,respectively,with average target strengths of(-52.18±5.90)and(-52.08±4.42)dB.The fish density was unevenly distribted horizontally,with concentrations in river bends and confluences.Vertically,in the Jiangjin section,fish densities during the two periods were ranked as middle layer>surface layer>bottom layer and surface layer>middle layer>bottom layer.In the Zhongxian section,fish densities during the two periods were ranked as surface layer>middle layer>bottom layer and surface layer>bottom layer>middle layer.In the Zigui section,fish densities during both periods were ranked as surface layer>middle layer>bottom layer.The fish densities in the Jiangjin,Zhongxian,and Zigui sections showed highly significant differences between the two periods(P<0.01).Catch surveys indicated that the river sections were dominated by lentic fish species,with the Cyprinidae family being predominant.The study provides data support for assessing the recovery and conservation of fish resources in the upper Yangtze River following the implementation of the fishing ban policy.关键词
目标强度/长江上游/时空分布/十年禁渔Key words
target strength/upper Yangtze River/spatiotemporal distribution/ten-year fishing ban分类
农业科技引用本文复制引用
WEI Xiaoyu,GAO Lei,WANG Ke,DENG Huatang,WANG Dengqiang,TIAN Huiwu,NI Dafu,XIE Wei,TANG Cheng,DUAN Xinbin,ZHOU Junjie..禁渔初期长江上游典型江段鱼类时空分布特征[J].中国水产科学,2025,32(9):1312-1326,15.基金项目
国家重点研发计划项目(2022YFC3202001) （2022YFC3202001）
国家自然科学基金委员会-中华人民共和国水利部-中国长江三峡集团有限公司长江水科学研究联合基金项目(U2240214) （U2240214）
中国水产科学研究院中央级公益性科研院所基本科研业务费专项(2023TD09). （2023TD09）
