Probiotics are live microorganisms that, when administered in quantities adequate, are beneficial to the host´s health (FAO 2005). Have been consolidated as one of the natural alternatives of the use of antibiotics, because they do not generate effects colateral. Probiotics can supplant growth promoters and in adequate amounts reduce mortality and increase feed conversión ( Gutierrez et 2013).
The experiment was carried out in September 2019, at the Atisa company, Puerto Pizarro, Tumbes, with a duration of 14 days, in which 6,560,000 postlarvae of white shrimp Litopenaeus vannamei were used, originating from the Arrecife laboratory, Ecuador. The larvae arrived in bags with oxygen inside a cardboard box, these were randomly distributed in 4 concrete raceways, each having a 1640000 with a density of 21 L / m3. A versus was carried out in which the RW-6 and RW-7 were added the marine probiotic in the food and for the RW-3 and RW-4 the probiotic HGS-7, vitamin DSM and glue were added in the white shrimp feed. The initial weight of the larvae was 310 larvae x gram, the initial feeding rate was 30% of the biomass, of the AQUATECH brand. About the quality of water (dissolved oxygen, pH, temperature and salinity) were evaluated every 2 hours with a multiparameter of the brand, while the chemical parameters of water (NH4, NO2, NO3) were evaluated with a spectrophotometer every 2 days during the experiment.
No significant difference was found at the end of evaluation in the productive indicators, such as specific and absolute growth rate, the same in the water quality parameters. However, the use of marine probiotic would save work time and costs.