Abstract
In the eggs and developing chick livers in the two wild bird species, great cormorant and herring gull, the concentrations of a range of 15 perfluoroalkyl acids (PFAAs) were determined. Eggs of the two species were collected from Lake Vänern, Sweden, and analysed either as undeveloped egg (whole egg or separated into yolk and albumen) or incubated until start of the hatching process when the chick liver was removed and analysed. High levels of PFAAs were found in all matrixes except albumen. The predominant PFAA was perfluorooctane sulfonate (PFOS), which was found in the μg/g wet weight (ww) range in some samples of cormorant whole egg, yolk and liver and herring gull egg yolk and liver. The average concentration in yolk was 1,506 ng/g ww in cormorant and 589 ng/g ww in herring gull. The average liver concentrations of PFOS were 583 ng/g ww in cormorant and 508 ng/g ww in herring gull. At these concentrations, biochemical effects in the developing embryo or effects on embryo survival cannot be ruled out. For perfluoroalkyl carboxylates (PFCAs), the liver/egg and liver/yolk concentration ratios increased with PFCA chain length in cormorant but not in herring gull, indicating that chain length could possibly affect egg-to-liver transfer of PFCAs and that species differences may exist.
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Acknowledgments
Funding for this project was provided by The Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Formas). We would like to thank Sten-Gunnar Steensson and Ola Westman for help with egg collection and Maria Larsson, Katrin Holmström and Anne-Sofie Kärsrud for help with analysis and result interpretation.
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Nordén, M., Berger, U. & Engwall, M. High levels of perfluoroalkyl acids in eggs and embryo livers of great cormorant (Phalacrocorax carbo sinensis) and herring gull (Larus argentatus) from Lake Vänern, Sweden. Environ Sci Pollut Res 20, 8021–8030 (2013). https://doi.org/10.1007/s11356-013-1567-3
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DOI: https://doi.org/10.1007/s11356-013-1567-3