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The variable reproductive performance of marine species in culture is a limiting factor in the production of juveniles. Spontaneous spawning of Lutjanus guttatus in captivity were evaluated from May to November during 2011 (n=45) and 2012 (n=44). The mean volumes were 90 and 104 ml, with 90 and 60% of viable eggs and hatching 76-80%. Spawning frequency was 3-4 days, but each season was characterized by a period where no spawns were registered, thus dividing the reproductive season into two periods. Highest volumes of spawns were recorded during the first period. Spawns from this period had significantly more EPA (20:5n-3) and less saturated fatty acids than those in the second period but only in the phospholipids. Quality criteria (egg diameter-ED, oil globule volume-OGV, larva length-LL, yolk volume-YV, OGV at hatching-OGVH) and fatty acid concentration in viable eggs were analyzed. LL, ED and OGV were higher in the first part of the season (P<0.05) while YV and OGVH were not significantly different. Spawn volumes showed a negative correlation with temperature (r= -0.48, P<0.001). DHA (22:6n-3) in phospholipids was correlated to egg diameter (r=0.34; P<0.05), while EPA in acylgycerides was correlated to OGVH (r=0.34; P<0.05) and YV (r=0.30; P<0.05).[br]

Palabras clave: juvenil; spawning; phospholipids

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