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dc.contributor.authorFuchs, Boris
dc.contributor.authorThiel, Alexandra
dc.contributor.authorZedrosser, Andreas
dc.contributor.authorBrown, Ludovick
dc.contributor.authorHydeskov, Helle Bernstorf
dc.contributor.authorRodushkin, Ilia
dc.contributor.authorEvans, Alina
dc.contributor.authorBoesen, Amanda Høyer
dc.contributor.authorGræsli, Anne Randi
dc.contributor.authorKindberg, Jonas
dc.contributor.authorArnemo, Jon Martin
dc.identifier.citationEnvironmental Pollution (1987). 2021, 287 .en_US
dc.description.abstractExposure to lead (Pb) is a global health problem for both humans and wildlife. Despite a dramatic decline in human Pb exposure following restrictions of leaded gasoline and industry and thereby an overall reduction of Pb entering the environment, Pb exposure continues to be a problem for wildlife species. Literature on scavenging terrestrial mammals, including interactions between Pb exposure and life history, is however limited. We quantified Pb concentration in 153 blood samples from 110 free-ranging Scandinavian brown bears (Ursus arctos), 1–25 years old, using inductively coupled plasma sector field mass spectrometry. We used generalized linear models to test effects of age, body mass, reproduction status and spatial distribution on the blood Pb concentrations of 56 female bears. We sampled 28 females together with 56 dependent cubs and paired their blood Pb concentrations. From 20 lactating females, we measured the Pb concentration in milk. The mean blood Pb concentration was 96.6 μg/L (range: 38.7–220.5 μg/L). Both the mean and range are well above established threshold concentrations for developmental neurotoxicity (12 μg/L), increased systolic blood pressure (36 μg/L) and prevalence of kidney disease in humans (15 μg/L). Lactating females had higher Pb blood concentrations compared to younger, non-lactating females. Blood Pb concentrations of dependent cubs were correlated with their mother's blood Pb concentration, which in turn was correlated with the Pb concentration in the milk. Life-long Pb exposure in Scandinavian brown bears may have adverse effects both on individual and population levels. The high blood Pb concentrations found in brown bears contrast the general reduction in environmental Pb contamination over the past decades in Scandinavia and more research is needed to identify the sources and pathways of Pb exposure in the brown bears.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleHigh concentrations of lead (Pb) in blood and milk of free-ranging brown bears (Ursus arctos) in Scandinaviaen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480en_US
dc.subject.nsiVDP::Zoology and botany: 480en_US
dc.source.journalEnvironmental Pollution (1987)en_US
dc.relation.projectAndre: Norwegian Environment Agencyen_US
dc.relation.projectNorges forskningsråd: xxxxxxen_US
dc.relation.projectAndre: Swedish Environmental Protection Agenciesen_US

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal