| mercury concentrations in breast feathers of three upper trophic level marine predators from the western aleutian islands, alaska. | mercury (hg) is a toxic element distributed globally through atmospheric transport. agattu island, located in the western aleutian islands, alaska, has no history of point-sources of hg contamination. we provide baseline levels of total mercury (thg) concentrations in breast feathers of three birds that breed on the island. geometric mean thg concentrations in feathers of fork-tailed storm-petrels (oceanodroma furcata; 6703 ± 1635, ng/g fresh weight [fw]) were higher than all other species, incl ... | 2014 | 24656750 |