Effects of feeding tilapia filleting by-product meal for Nile tilapia (Oreochrolnis niloticus L.) during the sexual reversion phase

The effects of feeding tilapia filleting by-product meal (TF) for Nile tilapia (Oreochromis Niloticus L.) during the Sexual reversion phase were evaluated. Three hundred and seventy-five 2-3-d larvaes were allotted to 25 30L-aquariums. according to a complete randomized design with five treatments of five replications. Aquarium with 15 larvae comprised the experimental unit. Diets were formulated to be isonitrogenous and isoenergetic and contained 38.6% of digestible protein and 3,800 kcal of ED/kg, on increasing levels of TF (0.5, 10, 15, and 20%). Mean temperature, dissolved oxygen, PH and electrical conductivity rates of water during the experimental period were of 24.53 +/- 1.60 degrees C; 4.81 +/- 0.68 mg/L; 7.70 +/- 0.25, and 175.97 +/- 108.46 mu S/cm respectively. At the end of the experiment, no differences were reported for final weight and length, condition factor, survival and sexual reversion index of larvae fed FT. It can be included up to 20% FT in diets for Nile tilapia during the sexual reversion phase, with no deleterious effects on performance.