Bodin Nathalie auteur aut IRD Amiel A. auteur aut IRD Fouche E. auteur aut IRD Sardenne Fanny auteur aut IRD Chassot Emmanuel auteur aut IRD Debrauwer L. auteur aut IRD Guillou H. auteur aut IRD Tremblay-Franco M. auteur aut IRD Canlet C. auteur aut IRD text journalArticle eng text/pdf born digital access Tunas are among the most traded and valued fish species, and good traceability of tuna products in the world market is needed to protect both consumers and tuna stocks. To that purpose, high-resolution proton nuclear magnetic resonance (H-1 NMR) spectroscopy combined with multivariate data analysis was used to investigate the molecular components of the aqueous extract of white and red muscles in three species of wild tropical tuna species, namely yellowfin tuna (Thunnus albacares), skipjack tuna (Katsuwonus pelamis) and bigeye tuna (T. obesus). Principal component analysis (PCA) and partial least squares-discriminant analysis (PLS-DA) applied to the processed H-1 NMR spectra showed significant separation according to the species and size category (i.e., small tunas < 80 cm fork length vs large tunas > 80 cm fork length), the storage conditions on-board the purse-seine vessels (i.e., brine- vs deep-freezing), and the geographical origin (i.e., where the tuna was caught: Mozambique Channel vs western-central Indian Ocean). The major groups of metabolites responsible for differentiation in PLS-DA score plots were the dipeptides (anserine, carnosine) and organic acids (lactate, creatine/phosphocreatine) in the white muscle, and the free amino acids, essential nutrients (choline and its derivatives, phosphatidylethanolamine), dipeptides and organic acids in the red muscle. Our results showed that NMR-based metabolomics is a powerful tool to efficiently discriminate specific profiles among wild tuna species, raw muscle tissues, fish storage conditions and tuna geographical origin. specialized Metabolomics High-resolution H-1 NMR Highly migratory large pelagic fish Purse seine tuna fisheries Western Indian Ocean Raw white and red muscles OCEAN INDIEN SEYCHELLES 054 040 020 371 131094 [10 ] 2022 0308-8146 https://www.documentation.ird.fr/hor/fdi:010083256 10.1016/j.foodchem.2021.131094 0308-8146 [F B010083256] https://www.documentation.ird.fr/hor/fdi:010083256 https://www.documentation.ird.fr/intranet/publi/2021-11/010083256.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-11-10 2025-02-24 fdi:010083256 fre