{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,17]],"date-time":"2026-09-17T15:30:08Z","timestamp":1789659008000,"version":"4.0.1"},"reference-count":117,"publisher":"Public Library of Science (PLoS)","issue":"9","license":[{"start":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T00:00:00Z","timestamp":1789516800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000041","name":"Fisheries and Oceans Canada","doi-asserted-by":"publisher","award":["Competitive Science Research Fund under projectFS-22-04-02"],"award-info":[{"award-number":["Competitive Science Research Fund under projectFS-22-04-02"]}],"id":[{"id":"10.13039\/501100000041","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Discovery Grant"},{"DOI":"10.13039\/501100002784","name":"Canada Excellence Research Chairs, Government of Canada","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002784","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002784","name":"Canada Excellence Research Chairs, Government of Canada","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100002784","id-type":"DOI","asserted-by":"publisher"}]},{"name":"L\u2019Institut Agro","id":[{"id":"https:\/\/ror.org\/01dkyve95","id-type":"ROR","asserted-by":"crossref"}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>\n                    Capelin (\n                    <jats:italic>Mallotus villosus<\/jats:italic>\n                    ), a key forage fish in the Northwest Atlantic, links zooplankton to predators including commercial fishes, seabirds, and marine mammals, yet its life-cycle connectivity in the Gulf of St. Lawrence (GSL) remain poorly understood. Between 2022 and 2024, otoliths from 927 individuals collected during and after spawning were analysed by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS), and seven trace elements (Li, B, Mg, K, Zn, Sr, Ba) were used to discriminate three chemically distinct regions within the GSL. Early-life regional origin was inferred by classifying otolith core chemistry, treated as an integrated late-larval to early-juvenile signal rather than a strictly natal marker, against a discriminant model trained on otolith-edge reference signatures. Assignment of core signatures to regions indicated limited cohort-level effects, in accordance with the low interannual variability in regional otolith edge signature. A combination of widespread dispersal and patterns consistent with regional fidelity was found, with contrasts among regions in terms of fidelity vs interconnection. Fish sampled during spawning were more often reassigned to their inferred early-life region than post-spawning fish, a regional-scale homing-like pattern consistent with regional spawning fidelity. This coexistence of both dispersal and regional fidelity patterns likely contributes to a portfolio effect that may buffer the population against environmental variability and localised reproductive failures.\n                  <\/jats:p>","DOI":"10.1371\/journal.pone.0352922","type":"journal-article","created":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T17:39:02Z","timestamp":1789580342000},"page":"e0352922","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":0,"title":["Regional fidelity vs dispersal of capelin (Mallotus villosus) in the Gulf of St. Lawrence, inferred from otolith chemistry"],"prefix":"10.1371","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7256-3473","authenticated-orcid":true,"given":"Romaric","family":"Jac","sequence":"first","affiliation":[{"name":"Institut des sciences de la mer, Universit\u00e9 du Qu\u00e9bec \u00e0 Rimouski","place":["Rimouski, Quebec, Canada"]},{"name":"UMR DECOD (Ecosystem Dynamics and Sustainability), L\u2019Institut Agro, Ifremer, INRAE","place":["Rennes, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Elisabeth","family":"Van Beveren","sequence":"additional","affiliation":[{"name":"Fisheries and Oceans Canada, Institut Maurice-Lamontagne","place":["Mont-Joli, Quebec, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olivier","family":"Le Pape","sequence":"additional","affiliation":[{"name":"UMR DECOD (Ecosystem Dynamics and Sustainability), L\u2019Institut Agro, Ifremer, INRAE","place":["Rennes, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mathieu","family":"Boudreau","sequence":"additional","affiliation":[{"name":"Fisheries and Oceans Canada, Institut Maurice-Lamontagne","place":["Mont-Joli, Quebec, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lola","family":"Coussau","sequence":"additional","affiliation":[{"name":"Fisheries and Oceans Canada, Institut Maurice-Lamontagne","place":["Mont-Joli, Quebec, Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pascal","family":"Sirois","sequence":"additional","affiliation":[{"name":"Universit\u00e9 du Qu\u00e9bec \u00e0 Chicoutimi","place":["Chicoutimi, Quebec, Canada"],"department":["D\u00e9partement des Sciences Fondamentales"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0628-2841","authenticated-orcid":true,"given":"Dominique","family":"Robert","sequence":"additional","affiliation":[{"name":"Institut des sciences de la mer, Universit\u00e9 du Qu\u00e9bec \u00e0 Rimouski","place":["Rimouski, Quebec, 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