Abstract
This paper reports on a study of the food and feeding habits of the principal fish species of the
Curuá-Una hydroelectric reservoir. 1,463 stomachs, belonging to the 29 most frequent fish species, of
50 species caught, were analyzed. The fish species were classified in accordance with the food consumed
in one of these four trophic groups: detritivores, herbivores, carnivores and piscivores, eating mainly
detritus, vegetal (algae), invertebrates (crustaceans and insects) and fish.
The grouped results for the stations above the dam show that herbivores and dominant with
42,2% of the biomass, followed by carnivores (30,7 %), piscivores (25,5 %) and detritivores (1,4 %).
