Recovery of Fatty Acid Composition in Mediterranean Yellowtail ( Seriola dumerili , Risso 1810) fed a Fish-Oil Finishing Diet

• Published in: International journal of molecular sciences Vol. 21; no. 14; p. 4871
• Main Authors: Bordignon, Francesco, Martínez-Llorens, Silvia, Trocino, Angela, Jover-Cerdá, Miguel, Tomás-Vidal, Ana
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 09-07-2020; MDPI
• Subjects: Animals; Aquaculture; Arachidonic acid; Arachidonic Acid - metabolism; atherogenicity; Composition; DHA; Diet; Diet - methods; Docosahexaenoic acid; Docosahexaenoic Acids - metabolism; Eicosapentaenoic acid; Eicosapentaenoic Acid - metabolism; EPA; Fatty acid composition; Fatty acids; Fatty Acids - metabolism; Fish oils; Fish Oils - metabolism; greater amberjack; Linoleic acid; Linolenic acid; Linseed Oil - metabolism; Lipids; Metabolism; Muscles; Muscles - metabolism; Perciformes - metabolism; Plant Oils - metabolism; thrombogenicity; Vegetable oils; wash-out; Yellowtail; greater amberjack; atherogenicity; DHA; thrombogenicity; wash-out; EPA
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms21144871

The present study evaluated the effects of wash-out on the fatty acid (FA) composition in the muscles of Mediterranean yellowtail. After 109 days during which fish were fed either a fish oil (FO)-based diet (FO 100) or a diet (FO 0) in which FO was completely substituted by vegetable oils, all fish were subjected to a wash-out with FO 100 diet for 90 days. The FA profile of muscles in fish fed FO 0 diet at the beginning of the experiment reflected that of dietary vegetable oils, rich in linoleic acid (LA), and α-linolenic acid (ALA), and was deficient in AA (arachidonic acid), EPA (eicosapentaenoic acid), and DHA (docosahexaenoic acid). No essential FA were fully restored in fish previously fed FO 0 diet on 45th or 90th day of wash-out. At the end of wash-out, the FA composition showed that AA, EPA, and DHA in the white muscles increased by +33%, +16%, and +43% (
< 0.001), respectively. Similarly, AA and DHA in the red muscles increased by +33% and +41% respectively, while EPA remained similar to fish fed FO 0 diet exclusively. Therefore, a 90-d wash-out can partially improve the FA profile in muscles of Mediterranean yellowtail previously fed vegetable oil-based diets.