Levels of dried yeast spray-dried in diet for reversed Nile tilapia fingerlings (Oreochromis niloticus)

摘要

One hundred and two thousand reversed of Nile tilápia fingerlings (Oreochromis niloticus) with initial weight mean 0.13 ?± 0.01 g, distributed in twenty 1000-liter fish aquarium, were used to evaluate the inclusion of dried yeast in the diet. Samples were distributed in a entirely randomized design with five treatments (0.00; 7.80; 15.60; 23.40 and 31.20% yeast in the diet) andfour replicates. There was no effect of treatments on food conversion and survival. A quadratic effect over weight gam (Y=1.7133+0.0477X- 0.0017X2) and cost of diet/kg gain (Y=0.6170-0.0112X+0.0004X2) was observed. It was concluded the best level of dried yeast in diet for reversed Nile tilapia fingerlings is 14%.