title: Spatial trends of perfluorochemicals in harbor seals (Phoca vitulina) from Danish waters.
abstract: Spatial trends of concentrations of perfluorinated chemicals (PFCs) were investigated in harbour seal liver tissue from seven locations in Denmark, ranging from the Wadden Sea in the southern North Sea to the Western Baltic. All samples were collected during the phocine distemper epizootic in 2002 which provided access to a large number of comparable samples over a short time period. PFOS was dominating (mean: 92% of ∑PFC) among the PFCs in the samples, followed by considerably lower concentrations of PFHxS (1.8%), PFDA (1.7%), PFNA (1.6%) PFUnA (1.5%), PFOA (0.9%) and PFOSA (0.5%). The concentrations of all the investigated compounds showed significant differences among the seven locations. PFOS showed the highest concentrations in the Wadden Sea, where high burdens have also been recorded in German seals. Most compounds showed a trend towards higher concentrations at one or both extremes of the geographic range. Two different patterns of relative PFC concentrations were detected; one in the inner Danish waters where PFOSA and PFUnA were more prevalent and another in the Wadden Sea and Limfjord where PFOA, PFHxS and PFNA were found in greater proportions. These patterns probably represent Baltic and North Sea contamination sources.
authors.affiliation: Department of Bioscience, Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark. rdi@dmu.dk
authors.forename: Rune
authors.initials: R
authors.lastname: Dietz
authors.forename: Frank F
authors.initials: FF
authors.lastname: Rigét
authors.forename: Anders
authors.initials: A
authors.lastname: Galatius
authors.forename: Christian
authors.initials: C
authors.lastname: Sonne
authors.forename: Jonas
authors.initials: J
authors.lastname: Teilmann
authors.forename: Rossana
authors.initials: R
authors.lastname: Bossi
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D003710:Demography; D003718:Denmark; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D005466:Fluorocarbons / Q000032:analysis*; D005843:Geography; D046049:Phoca / Q000378:metabolism*; D018709:Statistics, Nonparametric; D053719:Tandem Mass Spectrometry
chemical_list: D005466:Fluorocarbons