Berçário experimental de camarões marinhos em sistema heterotrófico com uso de probiótico

Abstract

In the present study compared the growth performance of Litopenaeus vannamei and Farfantepenaeus subtilis in nursery heterotrophic system. The experimental design consisted of two treatments (L. vannamei and F. subtilis) with four replications. The cultivation was carried out during 52 days in tanks like "raceway" (0.9m2 and 300L), with initial stocking density of 222 shrimp/m2 and initial weight of 0.024g and 0.034g for L. vannamei and F. subtilis. The animals were fed a commercial ration (35% crude protein). The formation of heterotrophic environment was induced by adding organic fertilizer (molasses) to adjust the relationship Carbon:Nitrogen (20:1). The physical and chemical parameters of water quality showed no significant differences between treatments. The assessment of growth performance showed significant differences between the species with the highest growth (0.31g/week), higher mean final weight (2.31g) and better-feed conversion factor (0.70) for L. vannamei, compared to F. subtilis with a growth of 0.12g/week, final average weight of 0.88g and feed conversion factor of 1.09. However, F. subtilis had a higher survival (83.50%) than the L. vannamei (63.25%). Despite the best performance obtained by L. vannamei, the results indicate the potential for nursery F. subtilis in heterotrophic systems.