Crecimiento de crías de Oreochromis niloticus y Oreochromis mossambicus cultivadas en un sistema de recirculación y alimentadas con un suplemento de quistes de Artemia en la dieta comercial.

Previous studies demonstrated that it is possible to optimize Oreochromis mossambicus fry production in a recirculating system by means of supplemented diets with Artemia's cysts. In the present work, productive yields of Oreochromis niloticus, species kind highly cultured in México and worldwide, and O. mossambicus fry are reported in order to know the possible differences on growth and survival. Tilapia fry with a mean wet weight of 0.011 ± 0.002 and 0.017 ± 0.005 g(O. niloticus and O. mossambicus, respectively), were fed with a dietary inclusion of 10% of decapsulated Artemia cysts (QDS) in a starter commercial diet, during the first month of exogenous feeding after yolk absorption. Fry were reared in a recirculating system at a stocking density of 5 org/l (5000 org/m3). Diet was given at a daily feeding rate of 25% of body biomass, four times a day. Final mean weight and survival for O. niloticus and O. mossambicus were 1.31 ± 0.15 and 1.60 ± 0.22 g, and 90 % y 97.5 %, respectively. There were no significant differences (p > 0.05) in final yields (mean weight, length, biomass/l, daily weight gain, specific growth, feed conversion and survival) between species. The results suggests that an inclusion of 10% of QDS in the hatchery diet may improve growth performance of both Oreochomis species under similar management conditions. Technical and economic considerations should be carefully reviewed before using QDS at commercial level. [ABSTRACT FROM AUTHOR]