caa a22 4500 606227873 CHVBK 20210128101200.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10641-015-0414-4 doi (NATIONALLICENCE)springer-10.1007/s10641-015-0414-4 Diet of Leptobotia elongata revealed by stomach content analysis and inferred from stable isotope signatures [Elektronische Daten] [L. Li, Q. Wei, J. Wu, H. Zhang, Y. Liu, X. Xie] The diet of Leptobotia elongata in the Yibin reach of the Yangtze River, China was investigated by stomach content analysis and by stable isotope analysis from muscle. The results of the two methods were agreement. Both stomach contents and isotope analysis indicated that L. elongata fed in spring mainly on plankton, shrimp and fish, and secondarily on benthic invertebrates and aquatic insect larvae. For the stomach content analysis, the diet composition showed significant differences among the size classes in relative weight of prey items, with L. elongata changing feeding habits at c.110mm standard length. The smaller individuals fed on benthic invertebrates and aquatic insect larvae, whereas individuals >109mm fed mainly on shrimp and fish. A similar shift to piscivory at c.110mm standard length was found using the stable isotope mixing model to reveal dietary ontogeny by IsoSource software, and the trend in variation of the δ13C and δ15N was similar with increased body length, and the plankton is important prey item in all size classes. The δ13C and δ15N values in similar sized individuals showed significant seasonal differences (δ13C, ANOVA, F = 76.33, p < 0.001 and δ15N, ANOVA, F = 144.56, p < 0.001), indicating a temporal dietary and trophic level shift. L. elongata is an important commercial species, and the results of the study form part of a detailed investigation of feeding ecology of L. elongata that provides basic data for studying the food web of the upper Yangtze River. Springer Science+Business Media Dordrecht, 2015 Leptobotia elongata nationallicence Dietary shift nationallicence Body length nationallicence Season nationallicence Stomach contents nationallicence Stable isotope nationallicence Li L. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut Wei Q. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut Wu J. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China. Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, China aut Zhang H. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China aut Liu Y. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut Xie X. School of Life Sciences, Southwest University, Chongqing, Beibei, China aut Environmental Biology of Fishes Springer Netherlands 98/8(2015-08-01), 1965-1978 0378-1909 98:8<1965 2015 98 10641 https://doi.org/10.1007/s10641-015-0414-4 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/s10641-015-0414-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li L. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Wei Q. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Wu J. Key Laboratory of Freshwater Biodiversity Conservation, Ministry of Agriculture of China. Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Zhang H. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China aut NATIONALLICENCE 700 1- Liu Y. College of Fishery, Huazhong Agricultural University, Wuhan, Hubei, China aut NATIONALLICENCE 700 1- Xie X. School of Life Sciences, Southwest University, Chongqing, Beibei, China aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/8(2015-08-01), 1965-1978 0378-1909 98:8<1965 2015 98 10641