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dc.contributor.authorMidthaug, Hilde Karin
dc.contributor.authorHitchcock, Daniel James
dc.contributor.authorBustnes, Jan Ove
dc.contributor.authorPolder, Anuschka
dc.contributor.authorDescamps, Sebastien
dc.contributor.authorTarroux, Arnaud
dc.contributor.authorSoininen, Eeva M
dc.contributor.authorBorgå, Katrine
dc.date.accessioned2021-07-02T08:21:34Z
dc.date.available2021-07-02T08:21:34Z
dc.date.issued2021-05-24
dc.description.abstractThe Antarctic ecosystem represents a remote region far from point sources of pollution. Still, Antarctic marine predators, such as seabirds, are exposed to organohalogen contaminants (OHCs) which may induce adverse health effects. With increasing restrictions and regulations on OHCs, the levels and exposure are expected to decrease over time. We studied south polar skua (<i>Catharacta maccormicki</i>), a top predator seabird, to compare OHC concentrations measured in whole blood from 2001/2002 and 2013/2014 in Dronning Maud Land. As a previous study found increasing organochlorine concentrations with sampling day during the 2001/2002 breeding season, suggesting dietary changes, we investigated if this increase was repeated in the 2013/2014 breeding season. In addition to organochlorines, we analyzed hydroxy-metabolites, brominated contaminants and per- and polyfluoroalkyl substances (PFAS) in 2013/2014, as well as dietary descriptors of stable isotopes of carbon and nitrogen, to assess potential changes in diet during breeding. Lipid normalized concentrations of individual OHCs were 63%, 87% and 105% higher for hexachlorobenzene (HCB), 1,1-dichloro-2,2-bis (p-chlorophenyl)ethylene (p,p'-DDE), and ∑Polychlorinated biphenyls (PCBs), respectively, in 2013/2014 compared to 2001/2002. South polar skuas males in 2013/2014 were in poorer body condition than in 2001/2002, and with higher pollutant levels. Poorer body condition may cause the remobilization of contaminants from stored body reserves, and continued exposure to legacy contaminants at overwintering areas may explain the unexpected higher OHC concentrations in 2013/2014 than 2001/2002. Concentrations of protein-associated PFAS increased with sampling day during the 2013/2014 breeding season, whereas the lipid-soluble chlorinated pesticides, PCBs and polybrominated diphenyl ether (PBDEs) showed no change. OHC occurrence was not correlated with stable isotopes. The PFAS biomagnification through the local food web at the colony should be investigated further.en_US
dc.identifier.citationMidthaug HK, Hitchcock DJ, Bustnes JO, Polder A, Descamps S, Tarroux A, Soininen EM, Borgå K. Within and between breeding-season changes in contaminant occurrence and body condition in the Antarctic breeding south polar skua. Environmental Pollution (1987). 2021en_US
dc.identifier.cristinIDFRIDAID 1912800
dc.identifier.doi10.1016/j.envpol.2021.117434
dc.identifier.issn0269-7491
dc.identifier.issn1873-6424
dc.identifier.urihttps://hdl.handle.net/10037/21692
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalEnvironmental Pollution (1987)
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectVDP::Mathematics and natural scienses: 400::Zoology and botany: 480en_US
dc.subjectOrganic pollutants Seabirds PFAS PCB HCB Mirex Catharacta maccormickien_US
dc.titleWithin and between breeding-season changes in contaminant occurrence and body condition in the Antarctic breeding south polar skuaen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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