Abstract
This study focuses on the extraction of nutritional and healthy constituents of whole by-products resulting from the commercialisation of Patagonian squid (Doriteuthis gahi). By-products corresponding to squid individuals captured at different seasons were comparatively analysed for proximate composition, lipid classes content, fatty acid (FA) profile, and macroelement and trace element composition. As a result, moisture, lipid, protein, and ash values were included in the ranges 829.0–842.8, 17.5–21.8, 106.0–123.7, and 9.3–13.3 g·kg−1 by-products, respectively. Phospholipids showed to be the most abundant lipid class (359.2–463.5 g·kg−1 lipids), while triacylglycerols were only present in a 9.5–13.1 g·kg−1 lipids range. Valuable levels were detected for α-tocopherol (539.6–973.3 mg·kg−1 lipids), polyunsaturated fatty acids (PUFA; 50.5–52.6 g·100 g−1 FA), ω3 PUFA (47.0–48.6 g·100 g−1 FA), PUFA/saturated FA ratio (1.4–1.6), and ω3/ω6 ratio (12.1–13.4). Among macroelements, S, P, and Na showed to be more abundant than K, Mg, and Ca. Profitable levels of Co, Cu, Fe, Mn, Se, and Zn were detected in all kinds of individuals. In spite of content variations found as a result of the capture season of Patagonian squid individuals, whole by-products of this cephalopod species can be considered as a profitable source to provide the food and pharmaceutical industries with useful value-added constituents.
Highlights
Published: 10 September 2021The wide chemical and biological diversity observed in marine fish and invertebrates make them an extraordinary source of highly valuable constituents that can be employed in many applications [1]
In spite of content variations found as a result of the capture season of Patagonian squid individuals, whole by-products of this cephalopod species can be considered as a profitable source to provide the food and pharmaceutical industries with useful value-added constituents
Marine lipids are the subject of a great deal of attention due to their high content of ω3 polyunsaturated fatty acids (PUFA), which have shown a positive role in preventing certain human diseases [3,4]
Summary
The wide chemical and biological diversity observed in marine fish and invertebrates make them an extraordinary source of highly valuable constituents that can be employed in many applications [1]. Among such constituents, highly nutritional and digestible proteins, lipid-soluble vitamins, essential minerals, and highly unsaturated fatty acids can be mentioned [2]. The capture season has shown to play a key role regarding temperature, feeding availability, and other factors in different types of marine species [8,9]
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