Performance Of Broiler Chickens Fed On Partially Defatted Black Soldier Fly Larvae Meal Protein

Background: Fish meal is a major protein source in poultry feeds, but its increasing demand has intensified competition between humans and livestock for the same resources. To address this, insects such as the black soldier fly larvae (BSFL) have emerged as promising alternative protein sources due to their rapid growth and ability to thrive on organic wastes. While full-fat BSFL meal has been studied, limited information exists on the optimal inclusion levels of defatted BSFL meal in broiler diets for sustainable poultry production. Results: Results showed the control diet outperformed others (p<0.05) in weight gain. No significant difference in starter FCR was observed, though finisher FCR differed significantly (p=0.0002). Carcass weights varied across diets. Meat contained numerous SFAs compared to MUFAs and PUFAs. Increasing substitution beyond 25% reduced carcass quality and net marginal benefits. Feed costs increased with higher PDBSFLM levels, lowering profitability. Substituting FM with PDBSFLM up to 25% in broiler diets maintained acceptable performance, though economic returns declined. Conclusions: These findings suggest that while PDBSFLM is a viable alternative protein source, its use in broiler diets should not exceed 25% until further research explores strategies to improve fatty acid profile and cost effectiveness.