investigated for five fish species from a Central Amazonian floodplain area. Sampling was
carried out monthly using gillnets of different mesh sizes immersed in water for 24 h. We
examined the presence and absence of food in fish stomachs and those with food were
analysed and their energy content determined. Amongst the trophic groups studied, the
piscivores Acestrorhynchus falcirostris and Pygocentrus nattereri showed high numbers of …