EFEITOS DE DIETAS PRÁTICAS COM DIFERENTES NÍVEIS DEPROTEÍNA NA SOBREVIVÊNCIA E CRESCIMENTO DOCAMARÃO-ROSA Farfantepenaeus paulensis (Pérez-Farfante,1967)
The present study evaluated the survival and growth performance of the pink shrimp Farfantepenaeus paulensis (Peréz-Farfante, 1967) fed practical diets containing increasing crude protein (CP) levels. Shrimp juveniles were reared for 28 days in a seawater recirculation system composed of 24 tanks filled with 40 liters. Each experimental unit was stocked with 30 juveniles with an initial mean weight (± SD) of 0.23g (± 0.08). A completely randomized experimental design was applied with six dietary treatments (diets containing 25, 30, 35, 40, 45 and 50% crude protein) with four replicates each. Data were submitted to onewayanalysis of variance (ANOVA) followed by Duncan?s test. Differences were considered significant at 5%. Results indicate that a diet containing 40% CP resulted in a higher survival rate (mean of 93.8%), which, however, was not significantly different to the dietary treatments of 30, 35 and 50 % CP (mean survival of 91.1, 89.2 and 85.8%, respectively). Survival in the dietary treatments of 25, 30, 35, 45 and 50% CP were not significantly different. Although shrimp fed the diet containing 45% CP presented the highest mean final weight (0.87 g) and weight gain (0.62 g), these were not significantly different to the shrimp fed the 50% CP diet, which, in turn, had no significant differences to the dietary treatments of 25, 30, 35 and 40% CP. Results indicate that shrimp juveniles presented a superior performance when fed practical diets containing 45% crude protein, hence this protein level is recommended when F. paulensis ranging in size between 0.2?0.9 g are maintained under intensive rearing conditions.
Advisor:Eudes de Souza Correia; Wilson Francisco Britto Wasielesky Junior; Roberta Borda Soares; Ronaldo Olivera Cavalli
School:Fundação Universidade Federal do Rio Grande
Source Type:Master's Thesis
Date of Publication:02/22/2006