Abstract
In Latin America snapper species have shown great potential for mariculture, including L. guttatus , but it is necessary to study physiological aspects regarding its production. The purpose of this study was to determine the effects of temperature (24, 29 and 34°C) and salinity (15, 25, 35, 45) on the growth and survival of juvenile L. guttatus . All experiments were performed in a recirculation system with daily 300% change of water; in cylindrical 80 L tanks, and three replicates per treatment. 360 specimens were used for the experiments. Experiments were performed with 360 specimens. The results showed that there are differences ( P < 0.05) in salinity-temperature interaction. The highest specific growth rate appeared in the treatment of 34°C and salinity of 15. The greatest gain in average body weight was obtained in the treatment of 34°C and salinity of 25. The longer survival was recorded in the treatment of 24°C and salinities of 15 to 35. The low salinity tolerance for this species found shows that L. guttatus has a high potential to grow in lagoon-estuarine systems of low salinity (15) and no more than 35.
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