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Fish diversity reduction and assemblage structure homogenization in lakes:A case study on unselective fishing in China

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Water Biology and Security 2022年第3期1卷 43-50页

作者： Han Liu Yushun Chen Rodolphe E.Gozlan Xiao Qu Wentong Xia Fei Cheng Lizhu Wang Craig P.Paukert Julian D.Olden Songguang Xie State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072China University of Chinese Academy of Sciences Beijing100049China ISEM Universitéde MontpellierCNRSIRDEPHEMontpellierFrance International Joint Commission Great Lakes Regional Office DetroitMI48232USA U.S.Geological Survey Missouri Cooperative Fish and Wildlife Research UnitSchool of Natural ResourcesUniversity of Missouri302 Anheuser-Busch Natural Resources BuildingColumbiaMO65211USA School of Aquatic and Fishery Sciences University of WashingtonSeattleWA98195USA Department of Wildlife Fish&Environmental StudiesSwedish University of Agricultural SciencesUmeaSweden State Key Laboratory of Marine Resource Utilization in South China Sea Hainan UniversityHaikou570228China Huai'an Research Center Institute of HydrobiologyChinese Academy of SciencesHuai'an223002China

Unselective fishing involves activities that target the entire assemblage rather than specific fish species,size classes,or trophic *** common fishing approach has been in practice for decades in inland waters in China but its implications for biodiversity remain *** addressed this issue by studying fish assemblages in freshwater lakes(five fishing lakes,one reference lake,and a total of 51 sampling sites)between pre-and postfishing time-periods in Eastern China during 2017–*** effects of lake,fishing period,and their interactions on fish abundance,biomass,and diversity indices were *** analysis was conducted to test for differences in fish assemblages among lakes and between fishing *** the implementation of fishing activities,significant reductions in fish species richness,abundance,biomass,and all three life-history strategies(opportunistic,equilibrium,and periodic)were observed in fishing lakes,whereas opposite trends were observed in the reference *** similarity of fish assemblages among fishing lakes increased over the threeyear monitoring *** results suggest that unselective fishing reduces fish diversity and homogenizes fish assemblage structure in *** findings have important implications for protecting both biodiversity and fisheries in inland waters in China and are applicable to other countries or regions that rely on fish as a major food source.

关键词： Biodiversity conservation Human stressors Inland fisheries over exploitation Sustainability Beta diversity

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Present Status of Aquatic Resource and Its Catch of Mogra River in Bangladesh

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Sustainable Marine Structures 2021年第2期3卷 26-38页

作者： Chakraborty B.K. Verma A.K. Muniya S. Department of Fisheries Bangladesh and Agricultural UniversityBangladesh Govt.P.G.college SaidabadPrayaagrajIndia Bangladesh Agricultural University Bangladesh

Bangladesh is very rich in aquatic fauna with a *** present study,conducted during 2015 to 2019,recorded a total number of 131 species(104 fish,09 prawn,01 snail,04 crabs,and 13 turtles)belonging to 26 families were identified from the Mogra River and its flood *** ten types of fishing gears,different crafts,hook and line were found operative in the *** rates of using current jal(16.0-26.40%)and Kapuri jal(11.0-16.70%)were identified as detrimental gears destroying different *** fish productivity was decreased dramatically from 170.63±10.81mt to 134.75±8.02 mt with a decreasing percentage of 6.26 to 21.03%within five *** important aquatic species turtiles(Cyclem-ys oldhami,Melanocheelys tquuga and Morenia petersi)became rare and 17 commercially important aquatic species were at the edge of extinction(critically endangered,CR).From the study,67 species were recorded in the endangered(EN)category,20 species vulnerable status(VU),11 species lower risk(LR),07 species Least concern(LC)and 04 Data deficient(DF).To save the existing aquatic species in the studied riverine ecosystem and ensure better liveHhood of the fishes,a team of local management committee,similar to the Hilsa fisheries management technology is needed.

关键词： Aquatic fauna Biodiversity Rare Critically endangered Endangered Illegal fishing over exploitation

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