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dc.contributor.authorBengtsson, Oskar
dc.contributor.authorLydersen, Christian
dc.contributor.authorKovacs, Kit M.
dc.contributor.authorLindstrøm, Ulf
dc.date.accessioned2020-10-15T13:12:58Z
dc.date.available2020-10-15T13:12:58Z
dc.date.created2020-06-29T12:58:37Z
dc.date.issued2020
dc.identifier.citationPolar Biology. 2020, 43 (7), 773-788.en_US
dc.identifier.issn0722-4060
dc.identifier.urihttps://hdl.handle.net/11250/2683123
dc.description.abstractGlobal warming is causing Atlantification of water masses and concomitant changes in food webs in the Barents Sea region. To determine whether changes that have been documented at lower trophic levels are impacting the diet of ringed seals (Pusa hispida) gastrointestinal tracts (GITs) from 99 coastal-feeding ringed seals, collected in western Spitsbergen, Svalbard, were analysed via identification of hard-parts. The study animals were shot in spring (n = 30; April–July) or autumn (n = 69; August–October) during four consecutive years (2014–2017). Thirty different prey types were identified, but most seals (55.6%) had consumed between 2 and 4 different types of prey. Polar cod (Boreogadus saida) dominated the diet of the ringed seals in terms of relative biomass (Bi = 60.0%) and frequency of occurrence (FOi = 86.9%), followed by pricklebacks (Stichaeidae; Bi = 23.4%; FOi = 79.8%). Redundancy analysis (RDA) revealed that year was the only significant predictor explaining variance in autumn diet composition (RDA, F3 = 4.96, AIC = − 76.49, p ≤ 0.0050; blubber content and maturity/sex group were not significant). Blue whiting (Micromesistius poutassou) occurred in the diet in small quantities; this Atlantic fish species has not previously been documented in the ringed seals’ diet. Atlantic cod (Gadus morhua) had the highest Bi (9.2%) among Atlantic prey types. However, despite major changes in the last decade in the fish and zooplankton community in western Svalbard, and consumption of a few Atlantic prey types, the ringed seals’ diet in Svalbard continues to be dominated by Arctic prey, especially polar cod.en_US
dc.language.isoengen_US
dc.titleRinged seal (Pusa hispida) diet on the west coast of Spitsbergen, Svalbard, Norway: during a time of ecosystem changeen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber773-788en_US
dc.source.volume43en_US
dc.source.journalPolar Biologyen_US
dc.source.issue7en_US
dc.identifier.doi10.1007/s00300-020-02684-5
dc.identifier.cristin1817560
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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