The trial was conducted to evaluate the effects of feeding increasing levels (0, 10, 20 and 30%) of fish residues silage on the chemical composition of this silage with 30% wheat meal and on the performance of tilapia Nile fingerlings. Nile tilapia filleting residues were handle chopped, grounded and heated during 15 minutes at 105°C. After this procedure, it was added 30% wheat meal relative to residue total weight. The material was stored in plastic silos with 20 liters capacity during 30 days. Contents of DM, CP, EE, ash, calcium, P, pH and ammonia nitrogen were determined. The effects of fish residues silage on length, height, weight gain, apparent feed conversion, protein efficiency rate and survival means were evaluated. No significant difference of treatments on the evaluated parameters was observed. Residues of Nile tilapia filleting added of 30% wheat meal produce good quality silageto be used in fish feeding. The silage can be included up to 30% in the diets for tilapia fingerlings, with no effect on performance.
fish filleting residues; fish silage; Oreochromis niloticus; productive performance
