Comparisons of oxbow lake fish assemblages in relation to bigheaded carp establishment in the lower White River, Arkansas

作     者：Michael A.Eggleton Cody J.Salzmann Joseph E.Kaiser Shannon C.F.Smith 

作者机构：Department of Aquaculture and Fisheries University of Arkansas at Pine Bluff Arkansas Game and Fish Commission Virginia Institute of Marine Science 

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

年 卷 期：2024年第13卷第1期

页      面：188-205页

核心收录：

学科分类：07[理学] 0806[工学-冶金工程] 081501[工学-水文学及水资源] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 0713[理学-生态学] 

基　　金：U.S. Fish and Wildlife Service—Gulf States Marine Fisheries Commission through the Gulf&Atlantic Regional Panel on Aquatic Invasive Species the U.S. Fish and Wildlife Service—Lower Mississippi River Conservation Committee Additional financial support and facilities were provided by the Aquaculture/Fisheries Center at the University of Arkansas at Pine Bluff (UAPB) 

主　　题：Bigheaded carp Silver carp Aquatic nuisance species Fish assemblage Oxbow lake Large river 

摘      要：Background Since the late 1990s, bigheaded carps(largely silver carp [Hypophthalmichthys molitrix] but also bighead carp [H. nobilis]) have established throughout the lower Mississippi River basin. Using previously studied oxbow lakes in the lower White River basin, Arkansas, we compared current(2017, “post-carp establishment) fish assemblages to historical(2002, “pre-carp establishment) fish assemblages. Fish assemblages were comprehensively assessed using multiple gears, including boat electrofishing, mini-fyke nets, and experimental small-mesh gill *** T-tests suggested that fish assemblage indices of richness, diversity, evenness, and dominance were often greater(P 0.05) between the pre-carp and post-carp period with fish assemblages depicted using mini-fyke nets. Nonmetric multidimensional scaling analyses indicated that fish assemblages differed structurally between pre-carp and post-carp periods. Assemblage differences were linked to both small and large abundance changes for more than 20 species. Abundances of gizzard shad(Dorosoma cepedianum), emerald shiner(Notropis atherinoides), pugnose minnow(Opsopoeodus emiliae), crappies(Pomoxis spp.), bluegill(Lepomis macrochirus), orangespotted sunfish(L. humilis), and yellow bass(Morone mississippiensis) declined between the pre-carp and postcarp periods. Conversely, abundances of weed shiner(N. texanus), pallid shiner(Hybopsis amnis), longear sunfish(L. megalotis), buffalofishes(Ictiobus spp.), and gars(Lepisosteus spp.) generally increased during the same *** Although not possible to conclude assemblage shifts were entirely related to bigheaded carps due to the absence of an appropriate reference system where carps did not establish, the wide establishment of these carps is one of the most pervasive changes to have occurred in the lower White