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dc.contributor.authorCusa, Marine Lure Joana
dc.contributor.authorBerge, Jørgen
dc.contributor.authorVarpe, Øystein
dc.date.accessioned2019-12-09T14:00:37Z
dc.date.available2019-12-09T14:00:37Z
dc.date.issued2019-09-21
dc.description.abstractSpecies with a broad and flexible diet may be at an advantage in a rapidly changing environment such as in today's Arctic ecosystems. Polar cod (<i>Boreogadus saida</i>), an abundant and ecologically important circumpolar Arctic fish, is often described as a zooplankton generalist feeder, which suggests that it may cope successfully with changes in prey composition. This description is justified based on the relatively broad diet of polar cod across sites and seasons. In this case study, we used polar cod dietary data from fall and winter and from two distinct environments, dominated either by Arctic or Atlantic water masses in Svalbard. Our results point to the importance of time and space when drawing conclusions on dietary plasticity and degree of specialization. Polar cod diet differed significantly between fall and the winter and between Arctic and Atlantic domains. Polar cod from Arctic domains displayed a strong realized population specialization on <i>Themisto libellula</i> in fall, and the larger dietary niche width observed in the winter was the product of realized individual specialization, with increased feeding on fish prey. Overall, we did not observe a generalized feeding behavior. If dietary niche width is to inform conservation management, we argue it must be recognized that populations from a single species may adopt seasonally contrasting degrees of dietary specialization and that these populations may differ in their vulnerability to climate‐induced changes in prey community composition.en_US
dc.identifier.citationCusa M, Berge J, Varpe Ø. Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish. Ecology and Evolution. 2019;9(19):11112-11121en_US
dc.identifier.cristinIDFRIDAID 1746065
dc.identifier.doi10.1002/ece3.5615
dc.identifier.issn2045-7758
dc.identifier.urihttps://hdl.handle.net/10037/16851
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalEcology and Evolution
dc.relation.projectIDNorges forskningsråd: 226417en_US
dc.relation.projectIDNorges forskningsråd: Fulbright Arctic Initiativeen_US
dc.relation.projectIDNorges forskningsråd: 227046en_US
dc.relation.projectIDNorges forskningsråd: 257080en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/POLARPROG/227046/Norway/Spatial and temporal variability in sea ice and primary production dynamics of the Arctic Ocean//en_US
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SSF/257080/Norway/Effects Of Seasonality And Spatial Heterogeneity On Polar Cod (Boreogadus Saida) Diet And Distribution In Svalbard Waters. RiS ID: 10442//en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.titleSeasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fishen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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