animals Article Processed By-Products from Soy Beverage (Okara) as Sustainable Ingredients for Nile Tilapia (O. niloticus) Juveniles: Effects on Nutrient Utilization and Muscle Quality Glenise B. Voss 1,2, Vera Sousa 1,3, Paulo Rema 1,4, Manuela. E. Pintado 2 and Luísa M. P. Valente 1,3,* 1 CIIMAR/CIMAR—Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Nórton de Matos, S/N, 4450-208 Matosinhos, Portugal;
[email protected] (G.B.V.);
[email protected] (V.S.);
[email protected] (P.R.) 2 CBQF—Laboratório Associado, Centro de Biotecnologia e Química Fina, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal;
[email protected] 3 ICBAS—Instituto de Ciências Biomédicas de Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal 4 UTAD—Universidade de Trás-os-Montes e Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugal * Correspondence:
[email protected]; Tel.: +351-223-401-825; Fax: +351-223-390-608 Simple Summary: The consumption of soy products increases worldwide and generates large amounts of by-products, which are often discarded. Okara is a soybean by-product with high nutritional value. This work evidenced the great potential of okara meal, after appropriate technological processing, to be used as feed ingredient in Nile tilapia diets. It was clearly demonstrated the effectiveness of Citation: Voss, G.B.; Sousa, V.; Rema, the autoclave and the use of proteases from C. cardunculus without fermentation to increase okara P.; Pintado, M..E.; Valente, L.M.P.