| clinal genetic variation at enzyme loci in bald eagles (haliaeetus leucocephalus) from the western united states. | five polymorphic enzyme loci of about 50 sampled were discovered in blood extracts of bald eagles from alaska, washington, oregon, and arizona, representing the first biochemical genetic variation described for the species. all five loci exhibited trends of north-to-south clinal geographic variation in gene frequencies. gene frequencies at three loci culminated in fixation in the arizona population, which consists of 12 known breeding pairs. the arizona birds were maximally heterozygous at the o ... | 1985 | 4015622 |
| lead poisoning of bald (haliaeetus leucocephalus) and golden (aquila chrysaetos) eagles in the u.s. inland pacific northwest region--an 18-year retrospective study: 1991-2008. | to determine risk factors and seasonal trends of lead poisoning in bald (haliaeetus leucocephalus) and golden (aquila chrysaetos) eagles, blood lead levels were evaluated in eagles admitted from the inland pacific northwest region of the united states to the raptor rehabilitation program, college of veterinary medicine at washington state university from 1991 to 2008. admissions were from washington (32 bald eagles, 27 golden eagles), northern idaho (21 bald eagles, 25 golden eagles), northeaste ... | 2010 | 21302758 |
| bald eagles and sea otters in the aleutian archipelago: indirect effects of trophic cascades. | because sea otters (enhydra lutris) exert a wide array of direct and indirect effects on coastal marine ecosystems throughout their geographic range, we investigated the potential influence of sea otters on the ecology of bald eagles (haliaeetus leucocephalus) in the aleutian islands, alaska, usa. we studied the diets, productivity, and density of breeding bald eagles on four islands during 1993-1994 and 2000-2002, when sea otters were abundant and scarce, respectively. bald eagles depend on nea ... | 2008 | 18959310 |
| elemental and organochlorine residues in bald eagles from adak island, alaska. | adak island is a remote island in the aleutian island archipelago of alaska (usa) and home to various military activities since world war ii. to assess the contaminant burden of one of adak island's top predators, livers and kidneys were collected from 26 bald eagle (haliaeetus leucocephalus) carcasses between 1993 and 1998 for elemental and organochlorine analyses. mean cadmium, chromium, mercury, and selenium concentrations were consistent with levels observed in other avian studies and were b ... | 2002 | 12238368 |
| comparison of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in feathers in bald eagle (haliaeetus leucocephalus), and comparison with common eider (somateria mollissima), glaucous-winged gull (larus glaucescens), pigeon guillemot (cepphus columba), and tufted puffin (fratercula cirrhata) from the aleutian chain of alaska. | there is an abundance of field data for levels of metals from a range of places, but relatively few from the north pacific ocean and bering sea. in this paper we examine the levels of arsenic, cadmium, chromium, lead, manganese, mercury and selenium in feathers from common eiders (somateria mollissima), glaucous-winged gulls (larus glaucescens), pigeon guillemots (cepphus columba), tufted puffins (fratercula cirrhata) and bald eagles (haliaeetus leucocephalus) from the aleutian chain of alaska. ... | 2009 | 18521716 |