Níveis de inclusão de fonte lipídica na dieta inerte úmida de larvas de Macrobrachium rosenbergii

Abstract

Through information on balanced diets according to the lipid requirements of Macrobrachium rosenbergii larvae, zootechnical production rates are improved, allowing for better productivity in larviculture, and consequently, meeting the nutritional needs of these organizations. Thus, the objective was to evaluate different levels of lipids in the inert diet of M. rosenbergii larvae. The experiment was carried out at the Shrimp Laboratory in the Fisheries Engineering Course / UFRB / Cruz das Almas, Bahia. The newly hatched larvae of M. rosenbergii were stored in 16 black polyethylene buckets (17L of brackish water at 12; 100) with an external biological filter in a closed dynamic system. The treatments were: 0.8%; 2.0%; 3.2% and 4.4% in a completely randomized design with 4 replications totaling 16 experimental units. The live food used was artemia nauplii, which were supplied to stage II to X once a day and the inert diet was requested in stage VII and VIII twice in the morning and from stage IX until metamorphosis in the post-larva, twice at day, morning and afternoon. The difference in dry weight (mg), initial and final, as well as important (%) and productivity (postlarvae / L) were analyzed. Despite the inclusion of 4.4% of lipids in the wet inert diet with cod liver oil as the source of higher productivity when compared to other results, studies should be carried out due to the lipid profile interfering with the nutritional requirements of the larvae.