“…Although some progress has been made on diet development for pacú, information about its nutritional requirements is still scarce. Total or partial replacement of fish meal by in nature or processed soybean did not affect juvenile and pacú fingerlings growth rate (Fernandes, Carneiro, & Sakomura, ; Stech & Carneiro, ), although the use of toasted soybean enhanced protein retention in adults (Ostaszewska, Dabrowski, Palacios, Olejniczak, & Wieczorek, ). The benefits of extrusion process relative to carbohydrate availability and protein digestion were demonstrated in pacú (Honorato et al, ).…”