Effects of temperature and stocking density on intensive culture of Pacific white shrimp in freshwater

摘要

In aquaculture, the application of predictive techniques based on statistical-mathematical modeling allows not only to project and study individual growth trajectories, but also to evaluate the probable effect of external factors that would explain their behavior over time. This is the case of this work, which takes the above as a principle to demonstrate the effect of water temperature on the growth of the Pacific white shrimp Litopenaeus vannamei cultured in fresh water (0 mg L-1), using densities of 90, 120, 180, 230, 280 and 330 shrimp m(-2). Shrimp were exposed to water temperature between 11.5 degrees C and 31.6 degrees C. Temperature effect was determined using a parameterized Gompertz growth model with experimental data from each initial culture density. The best shrimp productivity yield was obtained above 26 degrees C, and the least efficient was below 22 degrees C. Densities of 90-180 shrimp m(-2) and 230-330 shrimp m(-2) generated a maximum average size of 12.6 g and 8.8 g in 30 weeks, respectively. Here we present the implications of the effect of water temperature on the intensive culture of white shrimp with zero salinity (0 mg L-1) using these techniques from a predictive analytical approach.