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The annual summer breakup of sea\u2010ice coincides with resource pulses, which provide critical food sources for consumers to exploit. Marine organisms respond behaviourally to exploit these resources, with some migrating to presumably maximize feeding opportunities, whereas others remain resident, providing an ideal model to assess potential variability in fish movements and feeding. To assess variability in how migratory and resident fishes exploit increases in resource availability associated with ice\u2010off, we collected stomach contents from anadromous Arctic char (\n                    <jats:italic>Salvelinus alpinus<\/jats:italic>\n                    ;\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200991) and resident sculpins (\n                    <jats:italic>Myoxocephalus<\/jats:italic>\n                    spp.;\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u2009190) in Tremblay Sound, Nunavut, Canada, during the ice\u2010free seasons of 2017\u20132019. Despite eating larger prey, Arctic char experienced lower relative consumption [mean\u2009\u00b1\u2009standard deviation (SD); 1.92% body mass\u2009\u00b1\u20091.38%] than sculpins (2.88%\u2009\u00b1\u20092.93%). Arctic char also had fewer empty stomachs (\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u20091; 1.96%) than sculpins (\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200911; 14.7%). Of identified prey categories, 52.6% (\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200910 categories) were shared by both consumers, but notable exceptions occurred. Non\u2010metric multidimensional scaling (NMDS) ordination revealed dietary distinctions primarily driven by Arctic char's higher consumption of fishes and copepods, whereas sculpins fed heavily on amphipods. Our findings are consistent with sedentary and benthic\u2010oriented resident sculpins intermittently consuming small, benthic prey at high levels, whereas mobile, semipelagic, migratory Arctic char consume pelagic prey at consistent levels that likely do not impede aerobic activity. Ultimately, diets are reflective of consumer physiology but are also influenced by migratory versus resident movement strategies and likely interannual variation in prey abundance, providing insight into strategies used by fishes in the extremely seasonal Arctic, which may become increasingly consequential with climate change.\n                  <\/jats:p>","DOI":"10.1111\/jfb.70370","type":"journal-article","created":{"date-parts":[[2026,3,28]],"date-time":"2026-03-28T05:14:56Z","timestamp":1774674896000},"page":"1551-1564","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Diets of sculpins (\n                    <i>Myoxocephalus<\/i>\n                    spp.) and\n                    <scp>Arctic<\/scp>\n                    char (\n                    <i>Salvelinus alpinus<\/i>\n                    ) during a spring resource pulse in the\n                    <scp>Canadian Arctic<\/scp>"],"prefix":"10.1111","volume":"108","author":[{"given":"Lars J.","family":"Hammer","sequence":"first","affiliation":[{"name":"Department of Biological Sciences University of New Hampshire  Durham New Hampshire USA"},{"name":"Bureau of Sea\u2010Run Fisheries and Habitat Maine Department of Marine Resources  Augusta Maine USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5913-5300","authenticated-orcid":false,"given":"Nathan T.","family":"Hermann","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences University of New Hampshire  Durham New Hampshire USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nigel E.","family":"Hussey","sequence":"additional","affiliation":[{"name":"Department of Integrative Biology University of Windsor  Windsor Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marianne","family":"Marcoux","sequence":"additional","affiliation":[{"name":"Arctic Aquatic Research Division Department of Fisheries and Oceans  Winnipeg Manitoba Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harri","family":"Pettitt\u2010Wade","sequence":"additional","affiliation":[{"name":"Department of Integrative Biology University of Windsor  Windsor Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin J.","family":"Hedges","sequence":"additional","affiliation":[{"name":"Arctic Aquatic Research Division Department of Fisheries and Oceans  Winnipeg Manitoba Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nathan B.","family":"Furey","sequence":"additional","affiliation":[{"name":"Department of Biological Sciences University of New Hampshire  Durham New Hampshire 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