Trophic structure of fish assemblages in five permanent lagoons of the high Parana River floodplain, Brazil

We evaluated fish assemblage diet and trophic structure in five lakes (Patos, Ze do Paco, Fechada, Ressaco do Pau Veio and das Garcas), connected or not with the river. Trophic structure analysis was based on the species whose number of sampled digestive tracts was greater or equal to 10 and ordinated according to a detrended correspondence analysis. We identified seven trophic guilds with the following representatives: (1) Detritivorous ileophagous: Cyphocharax modestus, Prochilodus lineatus, Steindachnerina insculpta and Loricariichthys platymetopon; ( 2) Herbivorous: Schizodon borellii and Leporinus lacustris; ( 3) Benthophagous: Iheringichthys labrosus, Satanoperca pappaterra and Trachydoras paraguayensis; ( 4) Insectivorous: Astyanax altiparanae, Moenkhausia intermedia and Parauchenipterus galeatus; ( 5) Piscivorous: Hoplias cf. malabaricus and Serrasalmus marginatus; ( 6) Carnivorous-carcinophagous: Pimelodus maculatus and ( 7) Insectivorous-lepidophagous: Roeboides paranensis. The detritivorous-ileophagous guild was the predominant one in the five lakes.