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Use of implanted satellite transmitters to locate Spectacled Eiders at-sea

January 1, 1995

Population estimates of Spectacled Eiders (Somateria fischeri) on the Yukon-Kuskokwim Delta (YKD), Alaska, suggest that by 1992 the number of birds on this major nesting area had declined to 1,721 pairs, 4% of that estimated in the 1970s (Stehn st al 1993). Consequently, Spectacled Eiders were listed as threatened under the Endangered Species Act. As nesting habitats for this species are believed to have changed little over the past 100 years, hypotheses concerning the cause of this decline include factors away from nesting areas. The non-nesting distribution of this eider is unknown, but birds are believed to molt and winter in the Bering and Chukchi seas (Dau and Kistchinski 1977). Systematic aerial surveys to locate areas where birds concentrate are expensive because of the vast area to be surveyed and dangerous because of restricted daylight and extreme weather conditions. Surveys from ships along the ice margin in the Bering Sea failed to locate concentrations of birds (Irving et al 1968, Everett et al 1989). We initiated a study to determine if at-sea areas used by Spectacled Eiders could be identified using satellite telemetry.

Publication Year 1995
Title Use of implanted satellite transmitters to locate Spectacled Eiders at-sea
DOI 10.2307/1369006
Authors Margaret R. Petersen, David C. Douglas, Daniel M. Mulcahy
Publication Type Article
Publication Subtype Journal Article
Series Title The Condor
Index ID 70182069
Record Source USGS Publications Warehouse
USGS Organization Alaska Science Center; Alaska Science Center Biology MFEB