Pré-engorda de camarão tigre gigante Penaeus monodon em diferentes sistemas de cultivo

Abstract

Biofloc technology (BFT) has emerged through the pursuit of techniques to make aquaculture more environmentally sustainable while maintaining high yield and profitability. This work aimed to evaluate the different systems of giant tiger shrimp during the pre-fattening phase. For that, three experiments conventional (T1), Recirculation (T2) and Bioflocos (T3) with three replicates were carrying out at AQUAPESCA in a period of 90 days; The shrimp post-larvae (PL) were stocked at a density of 2 PL/m3 with initial weight of 0.23 g (± 0.02 g) were distributed circular tanks with a capacity of 400 liters. The shrimp were fed commercial shrimp feed (40% CP) twice a day. The amount of feed given to the shrimp was initially 8.17% of the total biomass, decreasing up to 2% at the end of the experiment. The following variables were analyzed: dissolved oxygen, temperature, pH, salinity, ammonia and total solids. For statistical analysis, analysis of variance (ANOVA) and Tukey test (P <0.05) were used. It was observed that the temperature, the dissolved oxygen, presented a mean of 22ºC (± 0, 08), 23ºC (± 0, 05); 6.5mg / L (± 0.05), 6.3mg / L (± 0.08); in the morning and afternoon respectively. The final averages were 7.4 ± 0.08 pH, 21ppt (± 0,05) salinity, 1.2mg / L (± 0,08) NH3 + and 68mg / L (± 7,8) solids total. Monitoring of the growth of the animals was performed by weekly biometrics. At the end of the experiment, the weight gain, the apparent feed conversion, the survival rate of the cultivated animals were verified. The shrimp in Bioflocs presented weight gain (7.9g) at the apparent feed conversion rate (0.8), survival (93%) not significantly different (p <0.05) from the other treatments.