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Modulation of Atlantic salmon (Salmo salar) gut microbiota composition and predicted metabolic capacity by feeding diets with processed black soldier fly (Hermetia illucens) larvae meals and fractions
Summary
Researchers fed Atlantic salmon different preparations of black soldier fly larvae — whole, de-fatted, or with exoskeletons removed — and found that full-fat larvae meal most favorably altered the gut bacteria in young salmon. The findings suggest that how insect feed is processed matters for fish gut health, which has implications for sustainable aquaculture practices.
The present results showed that the dietary inclusion of insect meals and fractions can differently modulate the composition and predicted metabolic capacity of gut microbiota in Atlantic salmon pre-smolts. The use of full-fat black soldier fly larvae meal in diets for salmon is more favorable for beneficial modulation of gut microbiota than larvae processed by separation of lipid or exoskeleton fractions.
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