Does sous-vide cooking preserve the chemical and volatile composition of Atlantic salmon (Salmo salar L.) fedHermetia illucens larvae meal?

Abstract

Physico-chemical characteristics and volatile organic compounds (VOCs) of fillets from Atlantic salmon fed diets with two substitution levels of fishmeal by defattedHermetia illucens larvae meal (0 and 100%; H0, H100) were examined as raw and subjected to boiling and sous-vide (SV) cooking methods. H100 diet increased fillet saturated fatty acid content, thus negatively affecting the lipid health indexes. H100 was also associated with high levels of the n-3 fatty acids eicosapentaenoic and docosahexaenoic acids. H100 diet led to some modifications in VOC composition. Boiling and SV cooking increased lightness and yellowness indexes along with secondary oxidation products in comparison to the raw fillets. However, no differences were observed for the cooking loss and the nutritional values of the fillets processed with the two cooking methods. SV fillets had higher moisture than the boiled ones, whereas boiled fillets had a higher VOC content. The 100% substitution level and the cooking by boiling or SV guaranteed good characteristics and nutritional values of the salmon fillets.