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dc.contributor.authorKristensen, Martin Lykke
dc.contributor.authorOlsen, Esben Moland
dc.contributor.authorMoland, Even
dc.contributor.authorKnutsen, Halvor
dc.contributor.authorGrønkjær, Peter
dc.contributor.authorKoed, Anders
dc.contributor.authorKällo, Kristi
dc.contributor.authorAarestrup, Kim
dc.date.accessioned2021-10-01T07:39:38Z
dc.date.available2021-10-01T07:39:38Z
dc.date.created2021-08-09T13:21:37Z
dc.date.issued2021
dc.identifier.citationEcology and Evolution. 2021, 11 (16), 11477-11490.en_US
dc.identifier.issn2045-7758
dc.identifier.urihttps://hdl.handle.net/11250/2786866
dc.description.abstractCoexistence of ecotypes, genetically divergent population units, is a widespread phenomenon, potentially affecting ecosystem functioning and local food web stability. In coastal Skagerrak, Atlantic cod (Gadus morhua) occur as two such coexisting ecotypes. We applied a combination of acoustic telemetry, genotyping, and stable isotope analysis to 72 individuals to investigate movement ecology and food niche of putative local “Fjord” and putative oceanic “North Sea” ecotypes—thus named based on previous molecular studies. Genotyping and individual origin assignment suggested 41 individuals were Fjord and 31 were North Sea ecotypes. Both ecotypes were found throughout the fjord. Seven percent of Fjord ecotype individuals left the study system during the study while 42% of North Sea individuals left, potentially homing to natal spawning grounds. Home range sizes were similar for the two ecotypes but highly variable among individuals. Fjord ecotype cod had significantly higher δ13C and δ15N stable isotope values than North Sea ecotype cod, suggesting they exploited different food niches. The results suggest coexisting ecotypes may possess innate differences in feeding and movement ecologies and may thus fill different functional roles in marine ecosystems. This highlights the importance of conserving interconnected populations to ensure stable ecosystem functioning and food web structures.en_US
dc.language.isoengen_US
dc.titleDisparate movement behavior and feeding ecology in sympatric ecotypes of Atlantic coden_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber11477-11490en_US
dc.source.volume11en_US
dc.source.journalEcology and Evolutionen_US
dc.source.issue16en_US
dc.identifier.doi10.1002/ece3.7939
dc.identifier.cristin1924746
dc.relation.projectEU/20200411en_US
dc.relation.projectNorges forskningsråd: 294926en_US
dc.relation.projectNorges forskningsråd: 272090en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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