Resumen del producto

The Pacific red snapper (Lutjanus peru) is a potential species for aquaculture in Mexico. Spontaneous spawning has been obtained under culture conditions and larval culture is under development. In this study, 2 experiments were conducted to evaluate the effects of temperature (22-32°C at constant salinity; 35 ups)) and salinity (0-50ups at constant temperature;26 °C) on hatching and larvae. Gametes from a pair of wild ripe fish were obtained at the laboratory. Experimental units were filled with sterilized seawater inoculated with ˜120 eggs. Every hour, units were inspected to evaluate the beginning and 50% of hatching. Larval total length, oil globule diameter, and yolk-sac volume were measured at hatching. Temperature had an effect on the timing of hatching but no effect on hatching percentage which was above 83% at any temperature. No difference was observed for larval total length (2.09-2.18 mm), oil globule diameter (126-139 µm) and yolk-sac volume (0.058-0.089 mm3). At 0 ups, no hatched larvae were observed but hatching percentage increased with salinity. The maximum hatching was observed at 35 ups (81%) but it was still high from 40 to 50 ups (74-78%).

Palabras clave: seawater; larval length; globule diameter

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