Elemental composition in the bones and gills of juvenile Atlantic Bluefin Tuna (Thunnus thynnus): can it be used to distinguish batches?

Main Article Content

Inma Salvat-Leal
https://orcid.org/0000-0002-4092-3585
Aurelio Ortega
https://orcid.org/0000-0001-6754-3972
Edurne Blanco
https://orcid.org/0000-0002-7867-9514
Amanda Miras
https://orcid.org/0000-0003-0214-1344
Diego Romero
https://orcid.org/0000-0002-9666-0382

Abstract

Atlantic Bluefin Tuna (Thunnus thynnus) aquaculture has developed rapidly in recent years, making it necessary to discriminate between specimens derived from aquaculture (captive-reared) and those derived from fisheries (wild-caught). In this study, a method based on the chemical composition of discard tissues (gills and bones) in 3 batches of juvenile T. thynnus (tank-cultured on land, cage-reared in the sea, and wild-caught) was assessed. The concentrations of 11 macro- and micro-elements (i.e., Ca, Fe, K, Mg, Na, P, S, Cu, Mn, Zn, and Sr) were determined and evaluated using an analysis of variance (ANOVA) and 2 multivariate tests, namely a principal component analysis (PCA) and discriminant canonical analysis (DCA). The best results were obtained from the gills and from the batch corresponding to the wild-caught specimens. However, the results were not robust enough to establish any specific pattern that would facilitate the identification of the origin of T. thynnus specimens.

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Salvat-Leal, I., Ortega, A., Blanco, E., Miras, A., & Romero, D. (2026). Elemental composition in the bones and gills of juvenile Atlantic Bluefin Tuna (Thunnus thynnus): can it be used to distinguish batches?. Ciencias Marinas, 52. https://doi.org/10.7773/cm.y2026.3561
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