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Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and non-ortho-PCBs in eggs of white-tailed sea eagles collected along the Swedish coast in the Baltic Sea
Stockholms Universitet.
Swedish Museum of Natural History, Department of Environmental research and monitoring.ORCID iD: 0000-0002-1654-8762
Stockholms Universitet.
Swedish Museum of Natural History, Department of Environmental research and monitoring.
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2012 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 438, p. 166-173Article in journal (Refereed) Published
Abstract [en]

Concentrations of polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF), and dioxin-like non-ortho-PCBs were measured in white-tailed sea eagle (WTSE) eagle eggs collected along the Swedish coast of the Baltic Sea during the period 1992–2004. The eggs represent two different subpopulations with significantly different nestling brood sizes; the Baltic Proper (BP) with an approximately normal nestling brood size (1.62), and the south Bothnian Sea (sBS) with reduced nestling brood size (1.22) combined with asigni ficantly higher rate of dead eggs. The aim was to investigate if this difference in reproductive outcome was linked to differences in exposure to dioxin-like compounds. Three eggs collected in Greenland in 200 were included in the study to provide a reference sea eagle population outside of the Baltic Sea region. The concentrations of ΣPCDD, ΣPCDF and Σnon-ortho-PCB in the two subpopulations from the Baltic Sea (BS) region ranged from 0.41–4.1, 1.2–5.3 and 180–970 ng/g lipids, respectively, while in the Greenland population the ranges were 0.11–0.16, 0.22–0.33 and 57–83 ng/g lipid, respectively. 2,3,4,7,8-PCDF was the predominant congener in all areas and accounted for on average 31–49% of the total ΣPCDD/F concentrations. The total toxic equivalents (TEQ) in sBS WTSEs were higher (approximately 39 ng TEQ/g lipid) than reported in eggs for many other birds, and the major contributors to the TEQ in the Baltic Sea were the non-ortho-PCBs. A principal component analysis (PCA) showed a difference in congener pattern between the two Baltic regions that was statistically significant (Hotelling's T2 test). Wefound no significant differencesin the total TEQ between the two populations (sBS–BP) and thus no evidence was found linking the reproductive impairment in WTSE in sBS to the concentrations of PCDD/Fs or non-ortho-PCBs in the eggs.

Place, publisher, year, edition, pages
2012. Vol. 438, p. 166-173
National Category
Natural Sciences
Research subject
Man and the environment
Identifiers
URN: urn:nbn:se:nrm:diva-3348DOI: 10.1016/j.scitotenv.2012.07.016OAI: oai:DiVA.org:nrm-3348DiVA, id: diva2:1357940
Conference
438:166–173. http://dx.doi.org/10.1016/j.scitotenv
Note

The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (FORMAS) provided financial support for this project.

Available from: 2019-10-04 Created: 2019-10-04 Last updated: 2019-10-05Bibliographically approved

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