| contaminants and sea ducks in alaska and the circumpolar region. | we review nesting sea duck population declines in alaska during recent decades and explore the possibility that contaminants may be implicated. aerial surveys of the surf scoter (melanitta perspicillata), white-winged scoter (m. fusca), black scoter (m. nigra), oldsqaw (clangula hyemalis), spectacled eider (somateria fischeri), and steller's eider (polysticta stellei) show long-term breeding population declines, especially the latter three species. the spectacled eider was recently classified th ... | 1995 | 7556023 |
| environmental contaminants in four eider species from alaska and arctic russia. | population declines in four species of eider; common (somateria mollissima), king (somateria spectabilis), spectacled (somateria fischeri) and steller's (polysticta stelleri), have raised concerns about exposure to contaminants. livers and kidney tissues were collected from eiders in alaska and russia for organic and elemental analyses. results showed that organochlorine and many elemental levels were below toxic thresholds; however, in many cases, cadmium, copper, lead and serenium appeared hig ... | 2002 | 12152828 |
| longitudinal monitoring of sex steroid hormones in excrement of spectacled eiders (somateria fischeri). | from the 1970s to the 1990s, the breeding population of spectacled eiders (somateria fischeri) in western alaska declined by 96%, which led to the listing of this species as threatened under the endangered species act in 1993. since then, the population has stabilized, but has not recovered to pre-decline numbers. while little is known about reproductive endocrinology in spectacled eiders, in other avian species, estrogen and testosterone are known to initiate and modulate various reproductive p ... | 2014 | 24406512 |
| polychlorinated biphenyls in eggs of spectacled eiders (somateria fischeri) from the yukon-kuskokwim delta, alaska. | | 2005 | 16400558 |
| concentrations of metals and trace elements in blood of spectacled and king eiders in northern alaska, usa. | in 1996, we measured concentrations of arsenic, barium, cadmium, lead, mercury, and selenium in blood of adult king (somateria spectabilis) and spectacled (somateria fischeri) eiders and duckling spectacled eiders from northern alaska, usa. concentrations of selenium exceeded background levels in all adults sampled and 9 of 12 ducklings. mercury was detected in all adult spectacled eiders and 5 of 12 ducklings. lead concentrations were above the clinical toxicity threshold in one duckling (0.64 ... | 2004 | 14982389 |
| concentrations of trace elements in eggs and blood of spectacled and common eiders on the yukon-kuskokwim delta, alaska, usa. | we examined the relations among nesting success, egg viability, and blood and egg concentrations of as, cd, pb, hg, and se in a threatened population of spectacled eiders (somateria fischeri) and a sympatric population of common eiders (s. mollissima) on the yukon-kuskokwim delta, alaska, usa, during 1995 and 1996. during the early breeding season, males and females had mean se concentrations in their blood of 19.2 microg/g and 12.8 microg/g wet weight, respectively. blood se concentrations of f ... | 2002 | 12152768 |
| contaminant exposure and biomarker responses in spectacled eiders (somateria fischeri) from st. lawrence island, alaska. | effects of chemical contaminant exposure may be contributing to the decline of spectacled eiders (somateria fischeri) nesting in coastal areas of western alaska. we evaluated chemical exposure and potential effects in 20 male eiders collected near st. lawrence island, alaska. analytes included metals, trace elements, chlorinated organics, and (137)cesium ((137)cs). effects of contaminant exposure were evaluated using histopathology and biochemical measures of porphyrin profiles, cytochrome p450 ... | 2000 | 10556377 |
| lead poisoning of spectacled eiders (somateria fischeri) and of a common eider (somateria mollissima) in alaska. | lead poisoning was diagnosed in four spectacled eiders (somateria fischeri) and one common eider (somateria mollissima) found dead or moribund at the yukon delta national wildlife refuge, alaska (usa) in 1992, 1993, and 1994. ingested lead shot was found in the lower esophagus of one spectacled eider and in the gizzard of the common eider. lead concentrations in the livers of the spectacled eiders were 26 to 38 ppm wet weight, and 52 ppm wet weight in the liver of the common eider. a blood sampl ... | 1995 | 8583651 |