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To investigate potential dietary competition between these two salmonid species, stomach contents from Arctic char (<jats:italic>n<\/jats:italic>\u2009=\u2009301) and pink salmon (<jats:italic>n<\/jats:italic>\u2009=\u200928) were sampled from different areas within the archipelago. The most important prey in terms of biomass for both salmonid species were amphipods; <jats:italic>Themisto libellula<\/jats:italic> (<jats:italic>B<\/jats:italic>\u2009=\u200926.0%) for Arctic char and <jats:italic>Onisimus litoralis<\/jats:italic> (<jats:italic>B<\/jats:italic>\u2009=\u200935.0%) for pink salmon. Pianka\u2019s niche overlap revealed that dietary overlap between the two species was moderately high (<jats:italic>O<\/jats:italic><jats:sub>obs<\/jats:sub>\u2009=\u20090.59); both species had strong associations with intertidal invertebrates in areas where direct comparisons were possible (Kongsfjorden\/Krossfjorden). However, both salmonid species did also eat some fish, with Arctic char consuming more offshore pelagic fish, while the small number of fish eaten by pink salmon were primarily coastal demersal fish species. Arctic char was a more generalist feeder, while pink salmon was more of a dietary specialist. Furthermore, the diet composition of the Arctic char consisted of 32.9% Atlantic prey while the pink salmon, surprisingly, ate only Arctic species, likely due to their tightly coastal feeding habits. Even though the sample size for pink salmon was low, this study contributes new insights into salmonid diets in Svalbard and the potential for introduced species to compete with native Arctic endemics, particularly in the expected warmer Arctic of the future.<\/jats:p>","DOI":"10.1007\/s00300-023-03196-8","type":"journal-article","created":{"date-parts":[[2023,9,22]],"date-time":"2023-09-22T07:01:59Z","timestamp":1695366119000},"page":"1219-1234","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Marine diets of anadromous Arctic char (Salvelinus alpinus) and pink salmon (Oncorhynchus gorbuscha) in Svalbard, Norway"],"prefix":"10.1007","volume":"46","author":[{"given":"Olof","family":"Bengtsson","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3868-2345","authenticated-orcid":false,"given":"Christian","family":"Lydersen","sequence":"additional","affiliation":[]},{"given":"Guttorm","family":"Christensen","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8434-5927","authenticated-orcid":false,"given":"Jan Marcin","family":"W\u0119s\u0142awski","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5878-4819","authenticated-orcid":false,"given":"Kit M.","family":"Kovacs","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,9,22]]},"reference":[{"key":"3196_CR1","doi-asserted-by":"publisher","first-page":"607","DOI":"10.1111\/j.1095-8649.1996.tb01455.x","volume":"48","author":"PA Amundsen","year":"1996","unstructured":"Amundsen PA, Gabler HM, Staldvik F (1996) A new approach to graphical analysis of feeding strategy from stomach contents data\u2014modification of the Costello (1990) method. 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