David J. Hoffman Paul L. Flint J. Christian Franson 2011 <p>The relationships of selenium (Se) concentrations in whole blood with plasma activities of total glutathione peroxidase, Se-dependent glutathione peroxidase, and glutathione reductase were studied in long-tailed ducks (<i>Clangula hyemalis</i>) and common eiders (<i>Somateria mollissima</i>) sampled along the Beaufort Sea coast of Alaska, USA. Blood Se concentrations were &gt;8 &mu;g/g wet weight in both species. Linear regression revealed that the activities of total and Se-dependent glutathione peroxidase were significantly related to Se concentrations only in long-tailed ducks, raising the possibility that these birds were experiencing early oxidative stress.</p> application/pdf 10.1002/etc.522 en Society of Environmental Toxicology and Chemistry Selenium concentrations and enzyme activities of glutathione metabolism in wild long-tailed ducks and common eiders article