Abstract
The study aimed to evaluate the influence of diferente batches of Litopenaeus vannamei nauplii on production variables. Four cultures of 20 days each of commercial hatchery were carried out. Each cycle had different batches of nauplii and all management and laboratory conditions were identical for the four cultures. The nauplii were randomly distributed in 15m3 culture tanks with storage at a minimum density of 200 nauplii/L and a maximum density of 217 nauplii/L. Temperature, salinity and pH parameters were measured daily. Analysis of naupliar phototaxism was carried out using a beaker and a lamp. At the end of culture, the postlarvae were harvested and transferred to 500-liter boxes. Subsequently, production and survival data were obtained from the m_sample value. The different batches were evaluated individually within each hatchery, with no comparison between cultures. Batches C1, B1, B2 and C2 had better productivity averages in cultures I, II, III and IV, respectively. Therefore, it can be concluded that different batches of nauplii influence different productive responses
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