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Avaliaram-se o crescimento e a composição dos filés de juvenis de jundiá após 90 dias de alimentação com dietas contendo diferentes fontes protéicas. Foram utilizados 540 peixes, peso inicial=15,0±0,62g; comprimento inicial=11,98±0,35cm, distribuídos ao acaso em 18 tanques (30 peixes/tanque) com sistema de recirculação de água. Foram testadas seis dietas: 1 - farinha de carne e ossos + levedura (CL), 2 - farelo de soja + levedura (SL), 3 - farelo de soja (S), 4 - farinha de carne e ossos + farelo de soja (CS), 5 - farinha de peixe + levedura (PL) e 6 - farinha de peixe + farelo de soja (PS). Avaliaram-se: peso, comprimento total, taxa de crescimento específico, fator de condição, sobrevivência, conversão alimentar aparente, taxa de eficiência protéica e consumo diário. Também foram analisadas as composições do filé - umidade, proteína, lipídios, cinzas -, as taxas de deposição de proteína e gordura, além dos rendimentos de filé e carcaça. Maiores pesos, 111,5 e 108,6g, comprimento total, 22,6 e 21,6cm, e taxa de crescimento específico, 2,1 e 2,2%/dia, foram observados nos peixes alimentados com as dietas CS e PS. Os peixes alimentados com CS e PS também apresentaram maior deposição de proteína, 69,8 e 71,5mg/dia, e lipídios, 77,2 e 78,3mg/dia. A sobrevivência foi menor na dieta PS, 92,9%. Os maiores rendimentos de carcaça foram observados nos peixes alimentados com PS e PL, 82,9 e 82,7%, e o menor rendimento de filé ocorreu na dieta CL, 34,1%. The growth and fillet composition of jundiá juveniles after 90 days being fed with diets containing different protein sources were evaluated. Five hundred and forty fish (initial weight: 15.00±0.62g; initial length: 11.98±0.35cm) were randomly distributed in 18 tanks (30 fish/tank), in a water re-use system. Six diets were tested: 1- meat and bone meal + yeast (CL), 2- soybean meal + yeast (SL), 3- soybean meal (S), 4- meat and bone meal + soybean meal (CS), 5- fish meal + yeast (PL,) and 6- fish meal + soybean meal (PS). The following parameters were evaluated: weight, total length, specific growth rate, condition factor, survival, feed conversion ratio, protein efficiency ratio, and daily consumption. Fillet composition (moisture, protein, lipid, and ash), protein and lipid depositions ratios, carcass and fillet yields were also determined. The highest values of weight (111.5 and 108.6g), total length (22.6 and 21.6cm), and specific growth rate (2.1 and 2.2%/day), were observed in fish fed CS and PS diets. Fish fed CS and PS diets also showed the highest protein (69.8 and 71.5mg/day), and lipid depositions (77.2 and 78.3mg/day). Survival was smaller in fish fed diet PS (92.86%). The highest values of carcass yield were observed in fish fed PL and PS diets (82.9 and 82.7%), and the lower fillet yield was observed in CL diet (34.1%)

Desempenho e composição dos filés de jundiás (Rhamdia quelen) submetidos a diferentes dietas na fase de recria