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The aim of this study was to compare different feeding sequences in Lutjanus peru larval rearing. Two experiments were carried out. In Exp. 1 the use of the copepod Pseudodiaptomus euryhalinus and the rotifer Brachionus rotundiformis as second preys and the period of supply of each one (until Day 19 or Day 23) were compared. Based on results of Exp. 1, B. rotundiformis was used as second prey in Exp. 2. Treatments consisted of two densities of microalgae Nannochloropsis oculata, Low (300,000 cells/ml) and High (1,000,000 cells/ml). In both experiments, nauplii of Parvocalanus crassisrostris were used from Day 3 to Day 9-10. On day 5 in both experiments, 100% of feeding incidence was reached. When the second prey was added, we evaluated feeding efficiency, Ivlev selectivity index, mouth width (MW), survival and growth (Total length; TL). The Ivlev index showed that larvae selected more copepod nauplii than rotifers. In Exp. 1, on day 27 no significant differences in TL was observed among treatments (p>0.05) while in Exp. 2 on day 20, significantly higher TL (p <0.05) was observed in the High microalgae treatment. In Exp. 1, survival was greater when rotifer was used for a longer period of time (Day 23) and in the High microalgae treatment for Exp. 2. The MW did not show a significant increase between day 3 and 6 (p>0.05) and an isometric growth with respect to TL, adjusted by a linear regression model, was observed (R2 = 0.99) along the experiment. These results allow us to recommend the use of rotifer as second prey in L. peru larval rearing, as well as a High concentration (1,000,000 cells/ml) of microalgae as green water. The easy handling of rotifers compared to copepods will be more attractive for investors interested in implementing hatcheries for Pacific red snapper production.

Palabras clave: Larviculture; Pacific red snapper; feeding; Lutjanus peru

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