Preliminary Assessment of Replacing Fishmeal and Fish Oil with Black Soldier Fly Larval Meal and Oil on Growth Performance and Economic Profitability of Juvenile Common Carp Cyprinus Carpio Culture
Keywords:
alternative ingredients, growth rate, nutrient utilization, sustainabilityAbstract
This study assessed the growth performance and economic profitability of juvenile common carp (Cyprinus carpio) cultured on Black Soldier Fly (BSF) Hermetia illucens larval-based diets. The experiment was conducted in a recirculating system. Four isonitrogenous (350 g kg-1 crude protein) and isolipidic (80 g kg-1 crude fat) diets were formulated in which fishmeal (400 g kg-1) and fish oil (30 g kg-1) were simultaneously replaced with a defatted BSF larval meal and BSF larval oil at 0, 25, 50, and 75%. Fish (initial body weight of 96.30±8.35g) were hand-fed at 3% body weight for 7 weeks. The result indicated a significant linear increase (p < 0.05) in mean final weight, weight gain, and specific growth rate (SGR) with higher dietary levels of BSF larval meal and oil. The feed conversion ratio (FCR) decreased linearly with increasing inclusion levels of BSF larval meal and oil. The economic analysis showed a linear decline in profitability with higher dietary levels of BSF larval meal and oil. The findings suggest that BSF larval meal and oil could potentially replace up to 75% of dietary fishmeal and fish oil (300 g kg-1 and 25 g kg-1, respectively) without adversely impacting growth performance and nutrient utilization of juvenile common carp.
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