Effects of temperature and salinity on growth and survival of the Pacific red snapper Lutjanusperu (Pisces: Lutjanidae) juvenile

Spanish; Castilian. El presente trabajo determina los efectos de la temperatura (25 y 30°C) y salinidad (25, 35, 45 ups) sobre el crecimiento y supervivencia de juveniles. Todos los experimentos se realizaron en laboratorio. Un total de 270 organismos fueron utilizados en los experimentos. Los resultados mostraron que más del 86% de los peces sobreviven a salinidades de 35 y 45 ups. Se encontraron diferencias significativas en la tasa específica de crecimiento y ganancia en peso en los organismos criados a temperaturas de 25 y 30°C y salinidades de 35 y 45 ups. Aumento de la salinidad más allá de 45 ups afecta el crecimiento del huachinango utilizado en este experimento. La tolerancia a la salinidad bajo 35 ups muestra que la especie tiene el potencial para crecer en aguas de menor salinidad que el mar.

English. The present study evaluates the effects of temperature (25 and 30°C) and salinity (25, 35 and 45 psu) on juvenile growth and survival. All the experiments were carried out under rearing conditions. A total of 270 specimens were used for the experiments. The results showed that more than 86% of the snapper survived at 35 to 45 psu salinity. Significant differences in growth parameters, such as the specific growth rate and weight gain were observed in fish reared at temperatures of 25 and 30°C and salinities of 35 and 45 psu. Increased salinity beyond 45 psu negatively affected growth of the Pacific red snapper used in this trial. The effects of temperature and salinity on growth performance a survival rate indicated that red snapper is an euryhaline species, that may tolerate wide salinity ranges, showing that has a good potential to grow in waters of lower salinity than the sea.