Resumo

MERCADO BURGOS, Ingris et al. Dorada´s culture (Brycon sinuensis Dahl, 1955) in floating cages at different levels of protein. Rev Colom Cienc Pecua [online]. 2006, vol.19, n.2, pp. 204-211. ISSN 0120-0690.

Dorada´s culture (Brycon sinuensis) in floating cages during 180 days was evaluated. The increment in length, increment in weight, specify growth rate, final survival, total biomass, condition factor and nutritional conversion factor were determinated. 816 fishes with mean length of 17.8 cm total length and mean weight of 78.9 g were stocked in four treatments with stocking densities of 25 fishes/m3 and three replica each one. The balanced diets (gross protein) supplied were: treatment 1: 20%, treatment 2: 32%, treatment 3: 28%, and treatment 4: 24%, with experimental design random completely. Can be affirmed that the dorada fed the diets of vegetable origin as equal way than those of animal origin, although the diet of 28% gross protein (treatment 3) shows best perfomance, without significant differences between treatments (p>0.05). In other works with this species, the daily gain in weight was low, but better than the one obtained in this work; whereas the biomass yield was greater than the biomass yield reported for ponds cultures, the results of this study were very low

Palavras-chave : Animal fiber; biomass; gross protein; intensive culture; vegetal fiber.