{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T17:45:30Z","timestamp":1770745530395,"version":"3.49.0"},"reference-count":55,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2022,2,15]],"date-time":"2022-02-15T00:00:00Z","timestamp":1644883200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/04292\/2020"],"award-info":[{"award-number":["UIDB\/04292\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["CEECIND\/00511\/2017"],"award-info":[{"award-number":["CEECIND\/00511\/2017"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["DL57\/2016\/CP1479\/CT0022 and 2021.02710.CEECIND"],"award-info":[{"award-number":["DL57\/2016\/CP1479\/CT0022 and 2021.02710.CEECIND"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["DL57\/2016\/CP1479\/CT0024 and 2021.00244.CEECIND"],"award-info":[{"award-number":["DL57\/2016\/CP1479\/CT0024 and 2021.00244.CEECIND"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Mar2020","award":["MAR-01.03.01-FEAMP-0047"],"award-info":[{"award-number":["MAR-01.03.01-FEAMP-0047"]}]},{"name":"Mar2020","award":["MAR-02.02.01-FEAMP-0005"],"award-info":[{"award-number":["MAR-02.02.01-FEAMP-0005"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>The stalked barnacle Pollicipes pollicipes is an abundant species on the very exposed rocky shore habitats of the Spanish and Portuguese coasts, constituting also an important economical resource, as a seafood item with high commercial value. Twenty-four elements were measured by untargeted total reflection X-ray fluorescence spectroscopy (TXRF) in the edible peduncle of stalked barnacles sampled in six sites along the Portuguese western coast, comprising a total of 90 individuals. The elemental profile of 90 individuals originated from several geographical sites (N = 15 per site), were analysed using several chemometric multivariate approaches (variable in importance partial least square discriminant analysis (VIP-PLS-DA), stepwise linear discriminant analysis (S-LDA), linear discriminant analysis (LDA), random forests (RF) and canonical analysis of principal components (CAP)), to evaluate the ability of each approach to trace the geographical origin of the animals collected. As a suspension feeder, this species introduces a high degree of background noise, leading to a comparatively lower classification of the chemometric approaches based on the complete elemental profile of the peduncle (canonical analysis of principal components and linear discriminant analysis). The application of variable selection approaches such as the VIP-PLS-DA and S-LDA significantly increased the classification accuracy (77.8% and 84.4%, respectively) of the samples according to their harvesting area, while reducing the number of elements needed for this classification, and thus the background noise. Moreover, the selected elements are similar to those selected by other random and non-random approaches, reinforcing the reliability of this selection. This untargeted analytical procedure also allowed to depict the degree of risk, in terms of human consumption of these animals, highlighting the geographical areas where these delicacies presented lower values for critical elements compared to the standard thresholds for human consumption.<\/jats:p>","DOI":"10.3390\/molecules27041298","type":"journal-article","created":{"date-parts":[[2022,2,15]],"date-time":"2022-02-15T22:44:47Z","timestamp":1644965087000},"page":"1298","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Elemental Chemometrics as Tools to Depict Stalked Barnacle (Pollicipes pollicipes) Harvest Locations and Food Safety"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1914-7435","authenticated-orcid":false,"given":"Bernardo","family":"Duarte","sequence":"first","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"},{"name":"Departamento de Biologia Vegetal, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3702-5474","authenticated-orcid":false,"given":"Renato","family":"Mamede","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"}]},{"given":"Irina A.","family":"Duarte","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"}]},{"given":"Isabel","family":"Ca\u00e7ador","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"},{"name":"Departamento de Biologia Vegetal, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"given":"Susanne E.","family":"Tanner","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"},{"name":"Departamento de Biologia Animal, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0626-3269","authenticated-orcid":false,"given":"Marisa","family":"Silva","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"},{"name":"Departamento de Biologia Vegetal, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7475-9579","authenticated-orcid":false,"given":"David","family":"Jacinto","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Laborat\u00f3rio de Ci\u00eancias do Mar, Universidade de \u00c9vora, 7521-903 Sines, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8242-475X","authenticated-orcid":false,"given":"Teresa","family":"Cruz","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Laborat\u00f3rio de Ci\u00eancias do Mar, Universidade de \u00c9vora, 7521-903 Sines, Portugal"},{"name":"Departamento de Biologia, Escola de Ci\u00eancias e Tecnologia, Universidade de \u00c9vora, 7002-554 \u00c9vora, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6374-1194","authenticated-orcid":false,"given":"Vanessa F.","family":"Fonseca","sequence":"additional","affiliation":[{"name":"MARE\u2014Marine and Environmental Sciences Centre, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal"},{"name":"Departamento de Biologia Animal, Faculdade de Ci\u00eancias, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,15]]},"reference":[{"key":"ref_1","unstructured":"Reilly, A. 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