| Abstract: | We used radio-telemetry to examine survival of adult female and juvenile Spectacled Eiders (Somateria fischeri) from 30 days after hatch until departure from the Yukon-Kuskokwim Delta (YKD) during 1997-1999. Juvenile survival was 71.4%; adult female survival was 88.5%. Mink (Mustella vison) were the most common predator identified for both adults and juveniles. Detectable levels of lead were found in bones of 74% of juvenile carcasses recovered and 21% had levels indicative of acute exposure. Average age at departure was 59 ?? 1 days old for juveniles and 56 ?? 1 days after hatch for adults. Most broods (60.5%) departed the YKD synchronously. Overall our data indicate that mortality during the latter half of brood-rearing is higher than previously thought. We conclude that brood rearing is a period of high mortality for brood-rearing females and that lead poisoning is responsible for reductions in juvenile survival to fledging. Received 15 February 2000, accepted 1 April 2000. |
| Genre: | Article |
| ProdID: | 70022500 |
| Citation Author: | Flint, P. L.; Barry, Grand, J.; Morse, J. A.; Fondell, T. F. |
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| Citation End Page: | 297 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Waterbirds |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Late summer survival of adult female and juvenile spectacled eiders on the Yukon-Kuskokwim Delta, Alska; 2000; Article; Journal; Waterbirds; Flint, P. L.; Barry, Grand, J.; Morse, J. A.; Fondell, T. F. |
| Citation Start Page: | 292 |
| Citation Volume: | 23 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Late summer survival of adult female and juvenile spectacled eiders on the Yukon-Kuskokwim Delta, Alska; 2000; Article; Journal; Waterbirds; Flint, P. L.; Barry, Grand, J.; Morse, J. A.; Fondell, T. F. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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