{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T15:07:36Z","timestamp":1767625656020,"version":"3.48.0"},"reference-count":38,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T00:00:00Z","timestamp":1767139200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["153381\/2022"],"award-info":[{"award-number":["153381\/2022"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["LA\/P\/0008\/2020"],"award-info":[{"award-number":["LA\/P\/0008\/2020"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["UIDB\/50006\/2023"],"award-info":[{"award-number":["UIDB\/50006\/2023"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["LA\/P\/0121\/2020"],"award-info":[{"award-number":["LA\/P\/0121\/2020"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["UIDP\/05183\/2020"],"award-info":[{"award-number":["UIDP\/05183\/2020"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["UIDB\/05183\/2020"],"award-info":[{"award-number":["UIDB\/05183\/2020"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["PTDC\/BIA-BMA\/030517\/2017"],"award-info":[{"award-number":["PTDC\/BIA-BMA\/030517\/2017"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["UIDB\/04292\/2020"],"award-info":[{"award-number":["UIDB\/04292\/2020"]}]},{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia, I.P","award":["LA\/P\/0069\/2020"],"award-info":[{"award-number":["LA\/P\/0069\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Oceans"],"abstract":"<jats:p>Monitoring trace metals in commercially important fish species provides an early warning of anthropogenic contamination and potential risk to consumers. This study semi-quantified and quantified essential, non-essential, and toxic elements in the muscle of wild meagre (Argyrosomus regius) captured in the Tagus estuary (Portugal), which is used as a nursery and spawning aggregation area. Dry muscle was microwave-digested and analyzed using inductively coupled plasma\u2013optical emission spectroscopy. Semi-quantified screening detected Al, B, Ca, Fe, K, Mg, Na, P, S, Si, Sr, and Ti, and eight elements were determined using multielement calibration (As, Cr, Cu, Hg, Mn, Ni, Se, and Zn); Cd, Pb (toxic elements), Co, and Mo were not detected in this study. Arsenic was detected in all individuals, with a minimum value of 0.348 mg\/kg wet weight. A mercury level above the European Commission regulatory limit (0.5 mg\/kg wet weight) was only detected in one individual, corresponding to 2% of the samples. Although other metals remain well below regulatory limits, continued biomonitoring is recommended to track temporal trends and safeguard seafood safety in transitional coastal systems, which is important for commercially relevant fish species.<\/jats:p>","DOI":"10.3390\/oceans7010003","type":"journal-article","created":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T17:24:58Z","timestamp":1767201898000},"page":"3","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Essential, Non-Essential, and Toxic Elements in the Muscle of Meagre (Argyrosomus\u00a0regius) from the Tagus Estuary (Portugal)"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4683-804X","authenticated-orcid":false,"given":"Andr\u00e9 F.","family":"Jorge","sequence":"first","affiliation":[{"name":"MED\u2014Mediterranean Institute for Agriculture, Environment and Development & CHANGE\u2014Global Change and Sustainability Institute, Institute for Advanced Studies and Research, University of \u00c9vora, P\u00f3lo da Mitra, Ap. 94, 7006-554 \u00c9vora, Portugal"},{"name":"LAQV REQUIMTE (Associated Laboratory for Green Chemistry at Chemistry and Technology Network), Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8902-0910","authenticated-orcid":false,"given":"Carla","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"LAQV REQUIMTE (Associated Laboratory for Green Chemistry at Chemistry and Technology Network), Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0509-4515","authenticated-orcid":false,"given":"Bernardo","family":"Quintella","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, ARNET\u2014Aquatic Research Network, Institute for Research and Advanced Training (IIFA), Faculty of Sciences, Lisbon University, 1749-016 Lisboa, Portugal"},{"name":"Department of Biology, Faculty of Sciences, Lisbon University, Campo Grande, 1749-016 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1761-7376","authenticated-orcid":false,"given":"Marco","family":"Gomes da Silva","sequence":"additional","affiliation":[{"name":"LAQV REQUIMTE (Associated Laboratory for Green Chemistry at Chemistry and Technology Network), Department of Chemistry, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6372-9702","authenticated-orcid":false,"given":"Maria Jo\u00e3o","family":"Lan\u00e7a","sequence":"additional","affiliation":[{"name":"MED\u2014Mediterranean Institute for Agriculture, Environment and Development & CHANGE\u2014Global Change and Sustainability Institute, Department of Zootechny, School of Science and Technology, University of \u00c9vora, P\u00f3lo da Mitra, Ap. 94, 7006-554 \u00c9vora, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,12,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"7","DOI":"10.1016\/j.ecss.2011.12.038","article-title":"Historical Flux of Mercury Associated with Mining and Industrial Sources in the Marano and Grado Lagoon (Northern Adriatic Sea)","volume":"113","author":"Covelli","year":"2012","journal-title":"Estuar. 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