水生生物学报2018，Vol.42Issue(6)：1116-1123,8.DOI:10.7541/2018.137
浅水湖泊鱼类群落结构评估:复合网目刺网与网簖的比较
ASSESSING FISH ASSEMBLAGES IN A SHALLOW YANGTZE RIVER LAKE USING MULTI-MESH GILLNETS AND DENSE-MESH WEIRS
摘要
Abstract
To assess possible bias of different fishing methods is essential to appropriate fisheries management.In the current study,fish assemblage structure of a shallow Yangtze River lake was assessed by combining one international standard sampling gear (multi-mesh gillnet),and one traditional Chinese gear (the dense-mesh weir).Using Lake Biandantang as a case study,a total of 27 fish species were collected from the two gears combined,including 2 new species that had not been recorded previously in this lake.Results suggested that fish assemblages had changed greatly compared to a previous study conducted in the 1990s.Specifically,differences were found in species composition,abundance,biomass,and length distributions collected from the two gears.Difference in total length (TL) distributions of fishes caught was the most conspicuous change.Fishes collected from the weir ranged from 40-70 mm TL,whereas fishes collected from gillnets ranged from 90-140 mm TL.Multivariate ordinations based on relative abundance and biomass data also indicated fish assemblage structural differences between the two gears.The comparative results showed that the multi-mesh gillnet was effective at assessing fish assemblages in shallow lakes,such as those found along the middle and lower reaches of the Yangtze River.Additionally,assessments using only one gear could have some limitations with respect to interpreting fish assemblage changes over time.关键词
鱼类群落/评估/复合刺网/网簖/扁担塘Key words
Fish assemblages/Assessment/Multi-mesh gillnet/Weir/Biandantang Lake分类
农业科技引用本文复制引用
郭传波,王瑞,屈霄,辛未,陈宇顺,李钟杰..浅水湖泊鱼类群落结构评估:复合网目刺网与网簖的比较[J].水生生物学报,2018,42(6):1116-1123,8.基金项目
Supported by the National Natural Science Foundation of China (31602158) （31602158）
Chinese Academy of Sciences (Y62302,Y45Z04 & ZDRW-ZS-2017-3-2) （Y62302,Y45Z04 & ZDRW-ZS-2017-3-2）
