Rainbow Trout (Oncorhynchus mykiss) Skin as Potential n-3 Fatty Acid Source

Purpose The rise in the demand and the limited availability of eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids claim to obtain these important long chain polyunsaturated fatty acids (LCPUFA) from novel sources. Skin of rainbow trout is a fish industry by-product but still contains valuable LC...

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Bibliographic Details
Published in:Waste and biomass valorization 2021, Vol.12 (10), p.5665-5673
Main Authors: Bruni, Leonardo, Husein, Yara, Secci, Giulia, Tulli, Francesca, Parisi, Giuliana
Format: Article
Language:English
Subjects:
Aquaculture
Byproducts
Composition
Diet
Dietary supplements
Engineering
Environment
Environmental Engineering/Biotechnology
Fatty acids
Fish diets
Fish farms
Fish meal
Fish skins
Food industry
Functional foods & nutraceuticals
Hermetia illucens
Human nutrition
Industrial Pollution Prevention
Larvae
Nutrition
Oncorhynchus mykiss
Polyunsaturated fatty acids
Renewable and Green Energy
Salmon
Short Communication
Skin
Substitutes
Trout
Waste Management/Waste Technology
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Summary:Purpose The rise in the demand and the limited availability of eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids claim to obtain these important long chain polyunsaturated fatty acids (LCPUFA) from novel sources. Skin of rainbow trout is a fish industry by-product but still contains valuable LCPUFA amounts with great potential applications in human nutrition and health. This study aimed to explore the nutritional composition of rainbow trout skin for its use as source of n-3 LCPUFA and its composition modification according to fish diet. Methods Rainbow trout were fed three diets including increasing substitution levels of fishmeal with full-fat black soldier fly ( Hermetia illucens ) larvae meal (0%, 25%, 50% substitution levels) over 98 days. Results DHA was the major representative of the n-3 LCPUFA in the skin of all dietary groups, being the H25 group the richest in this fatty acid. Conclusions The present study shows that the skin of rainbow trout can be a promising source of n-3 LCPUFA. Reusing the skin of farmed fish represents a possible way to decrease food industry by-products, to reduce n-3 LCPUFA shortfall and could lead to the development of functional foods and nutritional supplements including n-3 LCPUFA from fish skin. Graphic Abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-021-01384-3