Sardenne F. auteur aut IRD Bodin Nathalie auteur aut IRD Medieu A. auteur aut IRD Antha M. auteur aut IRD Arrisol R. auteur aut IRD Le Grand F. auteur aut IRD Bideau A. auteur aut IRD Munaron Jean-Marie auteur aut IRD Le Loc'h François auteur aut IRD Chassot Emmanuel auteur aut IRD text journalArticle eng text/pdf born digital access Mercury, omega-3 (docosahexaenoic acid, DHA and eicosapentaenoic acid, EPA) and macronutrients (fat and proteins) were quantified on a wet weight (ww) basis in 20 species of fish taken as bycatch in tropical tuna fisheries. Based on a hazard quotient taking into account mercury and omega-3 contents, a benefit-risk assessment for the consumption of these pelagic species was conducted for three people categories: young children, children and adults. All fish bycatch were found to be an excellent source of proteins (min -max = 14.4-25.2 g/100 g fillet), had low omega-6/omega-3 ratios (<1, except for silky shark), and had mercury content below the safety limits defined by sanitary agencies. Silky shark and Istiophoridae had the highest mercury contents (min -max = 0.029-0.317 ppm ww). Omega-3 contents were the lowest in silky shark (0.2 0.2 mg/100 g fillet) and the highest in striped marlin (3.6 +/- 3.2 g/ 100 g fillet). Billfishes (Istiophoridae, including striped marlin), minor tunas (Scombridae), and Carangidae had the highest omega-3 contents (min -max = 0.68-7.28 g/100 g fillet). The highest hazard quotient values obtained for silky shark and great barracuda reflected a lower nutritional benefit (i.e., low omega-3 source) than risk (i.e., mercury exposure), making them not advisable for consumption. Eight species had low hazard quotients, and among them cottonmouth jack and flat needlefish were found of high health interest (high protein, moderate fat contents, and low omega-6/omega-3 ratio). A daily serving portion of 85-200 g (according to people category) can be recommended for these species. Batfish, and to a lower extent pompano dolphinfish and brassy chub, can also be consumed safely and would provide greater health benefits than risks. These results advocate for a better access of these species to local populations. specialized Contaminant Polyunsaturated fatty acids Hazard quotient Pelagic fish Western Indian ocean OCEAN INDIEN SEYCHELLES 040 038 054 267 115614 [12 ] 2020 0269-7491 https://www.documentation.ird.fr/hor/fdi:010080458 10.1016/j.envpol.2020.115614 0269-7491 [F B010080458] https://www.documentation.ird.fr/hor/fdi:010080458 https://www.documentation.ird.fr/intranet/publi/2021/01/010080458.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-02-08 2025-02-24 fdi:010080458 fre