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- W2947068970 abstract "Abstract Knowledge of food resource partitioning among sympatric fish species is crucial for understanding the potential mechanisms of species coexistence. Gudgeons (Teleostei: Cyprinidae: Gobioninae) often dominate fish assemblages in the upper Yangtze River. However, little research has been conducted on their trophic interactions. In this paper, seasonal diet and feeding strategy variations of four sympatric gudgeon species, Coreius guichenoti , Coreius heterodon , Rhinogobio ventralis, and Rhinogobio cylindricus , were investigated by analysis of intestinal tract contents, aiming to explore whether food resource partitioning occurred among them. Fish specimens were collected during spring (April–May) and autumn (August–October) in 2010 in Hejiang, a free‐flowing stretch of the upper Yangtze River. Coreius guichenoti , C. heterodon, and R. cylindricus showed omnivorous feeding habits, while R. ventralis exhibited an obligate carnivore feeding habit. Diet overlap among the four studied species was high, especially in spring. However, changes in feeding strategies were observed in autumn. Specifically, C. guichenoti and R. cylindricus expanded their dietary niche breadth and consumed detritus, Sinopotamidae or Hydropsychidae as important complementary food resources. In contrast, C. heterodon and R. ventralis reduced their dietary niche breadth and became more specialized on mussels ( Limnoperna lacustris ). These results confirmed that sympatric fish species can coexist with high diet overlap, and food resource partitioning among these species may also fluctuate with the seasons." @default.
- W2947068970 created "2019-06-07" @default.
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- W2947068970 date "2019-05-28" @default.
- W2947068970 modified "2023-10-14" @default.
- W2947068970 title "Seasonal variations in food resource partitioning among four sympatric gudgeon species in the upper Yangtze River" @default.
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- W2947068970 doi "https://doi.org/10.1002/ece3.5293" @default.
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