DIGESTIBLE ENERGY AND PROTEIN REQUIREMENTS PER UNIT OF DAILY WEIGHT GAIN IN GROWING–FINISHING NILE TILAPIA REARED IN NET CAGES
DOI:
https://doi.org/10.63330/aurumpub.043-009Palabras clave:
Energy, Mathematical model, Protein, Requirement, Oreochromis niloticusResumen
This study determined the digestible energy (DE) and digestible protein (DP) requirements per unit of daily weight gain (DWG) in growing–finishing Nile tilapia, Oreochromis niloticus reared in net cages over 210 days. Fish (n = 630; 45.9 ± 1.7 g as means ± standard deviation) were distributed into five floating net cages (1 m3 each) and fed extruded diet with 3,041 kcal/kg DE and 302.1 g/kg digestible protein (DP), three times daily, based on biomass. All fish were bulk weighed at the start and end, and data on feed intake and body weight (15 fish per net cage) were recorded every 36-day feeding trial. The relationship between DE and DP requirements for unit of daily weight gain (DWG) was best fit using linear regression: DE = 2.3185 + 0.4323 DWG and DP = 0.2303 + 0.0429 DWG. Both DE (3.4 to 5.7 kcal/ g DWG) and DP (0.34 to 0.57 g/g DWG) increased by 1.7-fold per unit of DWG for fish from 45.9 to 1,013 g body weight (BW) and revealed decreased dietary DE and DP utilization across BW increment of fish. These findings provide new insights into the relationship between dietary DE and DP requirements per unit of DWG in growing–finishing Nile tilapia production.
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Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial-SinDerivadas 4.0.
