caa a22 4500 60622775X CHVBK 20210128101200.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10641-014-0351-7 doi (NATIONALLICENCE)springer-10.1007/s10641-014-0351-7 Co-occurring bighead and silver carps show similar food preference but different isotopic niche overlap in different lakes [Elektronische Daten] [U. Jayasinghe, Emili García-Berthou, Zhongjie Li, Wei Li, Tanglin Zhang, Jiashou Liu] Silver carp (Hypophthalmichthys molitrix) and bighead carp (Hypophthalmichthys nobilis) are among the most important fish species in aquaculture and have been introduced to many countries. The feeding ecology of these filter-feeding cyprinids is not well understood and has been mostly based on gut content analyses. We analyzed δ 13C and δ 15N stable isotope ratios of food resources and fish muscle tissues in four Chinese lakes, where these two species co-occur. Data analysis through Bayesian mixing models revealed that both fish species had similar diets within lakes, and where dietary shifts occurred, both species displayed dietary shifts simultaneously. Diet was generally based on plankton, however, detritus was the main food in eutrophic lake subjected to urban pollution, likely due to resource availability. Niche overlap and width were also variable but in general clear size-based resource partitioning was observed, with bighead carp preying more on zooplankton and occupying a higher trophic position and silver carp feeding more on phytoplankton. Food particles smaller than 64 μm, had little importance in their diets. Springer Science+Business Media Dordrecht, 2014 Sub-tropical lakes nationallicence Chinese carps nationallicence Filter-feeding fish nationallicence δ 13C and δ 15N nationallicence Layman metrics nationallicence Jayasinghe U. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut García-Berthou Emili Institute of Aquatic Ecology, University of Girona, E-17071, Girona, Catalonia, Spain aut Li Zhongjie State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut Li Wei State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut Zhang Tanglin State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut Liu Jiashou State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut Environmental Biology of Fishes Springer Netherlands 98/4(2015-04-01), 1185-1199 0378-1909 98:4<1185 2015 98 10641 https://doi.org/10.1007/s10641-014-0351-7 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-014-0351-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jayasinghe U. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut NATIONALLICENCE 700 1- García-Berthou Emili Institute of Aquatic Ecology, University of Girona, E-17071, Girona, Catalonia, Spain aut NATIONALLICENCE 700 1- Li Zhongjie State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut NATIONALLICENCE 700 1- Li Wei State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut NATIONALLICENCE 700 1- Zhang Tanglin State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut NATIONALLICENCE 700 1- Liu Jiashou State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, the Chinese Academy of Sciences, 7 South Donghu Road, 430072, Wuhan, China aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/4(2015-04-01), 1185-1199 0378-1909 98:4<1185 2015 98 10641