Abstract

VASQUEZ-TORRES, Walter; YOSSA PERDOMO, Martha I; HERNANDEZ AREVALO, Gilma  and  GUTIERREZ ESPINOSA, Mariana C. Apparent digestibility of feed ingredients of common use in the balanced diets for tilapia red hybrid (Oreochromis sp.). Rev Colom Cienc Pecua [online]. 2010, vol.23, n.2, pp.207-216. ISSN 0120-0690.

This study was carried out to determine the apparent digestibility coefficients (ADC) of dry mater (DM), crude protein (CP) and gross energy (GE) in various feed ingredients for hybrid tilapia (Oreochromis sp.) including fish meal (HP), meat and bone meal (HCH), blood meal (HS), corn gluten meal (GluM), soybean meal (HS), full-fat soybean (SI), sunflower meal (TG), palm kernel meal (TP), mix forage of corn (MFM), wheat meal (HTT), wheat grain (HTD), rice flour (HA), corn flour (HMA), germ of corn (GerM) and manioc flour (MF). 540 sexually reverts (average weight 270 g) were assigned to three 30 m² feeding tanks and nine 200-L cylindrical tanks with conical bottom, for feces collection. CDA analysis was performed by de indirect method, using 0.5% chromic oxide (Cr₂O₃) as marker. A semipurified diet was used as the reference diet. 15 experimental extruded diets were made, with 30% of the analyzed feed ingredient (MP). The CDA-DM varied widely from 34.7 and 42.2 % for TG and TP up to 90.7 and 95.8 for TS and HCH, respectively. The protein digestibility was high for most of the studied ingredients (higher than 80 %) except for HS with 74.6 %, GerM with 77.6 and HA with 79.3 %. The energy digestibility was high in the ingredients of animal origin and lower than 80 % in most of the vegetable MP, except for GluM (80.4 %), SI (82.1 %) and HYI (82.3 %).

Keywords : coefficients Digestibility; energy; feed ingredients; nutrition; protein.

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