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Title Nutritional Profiling and the Value of Processing By-Products from Gilthead Sea Bream (Sparus aurata)
ID_Doc 13018
Authors Pateiro, M; Munekata, PES; Domínguez, R; Wang, M; Barba, FJ; Bermúdez, R; Lorenzo, JM
Title Nutritional Profiling and the Value of Processing By-Products from Gilthead Sea Bream (Sparus aurata)
Year 2020
Published Marine Drugs, 18.0, 2
Abstract Fish processing industries generate a large volume of discards. In order to fulfil with the principles of a sustainable circular economy, it is necessary to maintain aquaculture by-products in the food chain through the production of high-value biomolecules that can be used as novel ingredients. In this study, we try to give value to the gilthead sea bream by-products, evaluating the composition and the nutritional value of the muscle and six discards commonly obtained from the fish processing industry (fishbone, gills, guts, heads, liver, and skin), which represent approximate to 61% of the whole fish. Significant differences were detected among muscle and by-products for fatty acid and amino acid profile, as well as mineral content. The discards studied were rich in protein (10%-25%), showing skin and fishbone to have the highest contents. The amino acid profile reflected the high quality of its protein, with 41%-49% being essential amino acids-lysine, leucine, and arginine were the most abundant amino acids. Guts, liver, and skin were the fattiest by-products (25%-35%). High contents of polyunsaturated fatty acids (PUFAs) (31%-34%), n-3 fatty acids (12%-14%), and eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) (6%-8%) characterized these discards. The head displayed by far the highest ash content (9.14%), which was reflected in the mineral content, especially in calcium and phosphorous. These results revealed that gilthead sea bream by-products can be used as source of value-added products such as protein, oils, and mineral supplements.
PDF https://www.mdpi.com/1660-3397/18/2/101/pdf?version=1580815546

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