Efecto de diferentes niveles de proteína y lípidos totales en la dieta sobre el crecimiento y supervivencia de juveniles de pargo lunarejo Lutjanus guttatus

the spotted rose snapper (lutjanus guttatus) is one of the most commercially important fish species in méxico. as it is considered a suitable candidate for culture, then it is necessary to identify its nutritional requirements in order to succeed. the aim of this study was to evaluate the effects of different protein and lipid levels on growth and survival of juvenile spotted rose snappers. nine semi-purified diets were formulated with three protein levels (40, 45 and 50%) and three lipid levels (9, 12 and 15%). hatchery-produced juvenile spotted rose snappers (2.2 ± 0.1 g) were used throughout the eight-week feeding experiment. body weight, specific growth rate, condition factor, feed consumption, feed conversion rate, and survival were determined in each treatment at the end of the experiment. the highest weight gained and better feed conversion ratio were obtained in fish fed diets with 45 and 50% protein and their three lipids levels. survival, feed consumption and condition factor were not affected by the treatments. these results indicate that juvenile spotted rose snappers require a minimum of 45% protein and 9% lipid for maximum growth and survival.