2008 Time Series Map from telemetry of Spectacled Eiders and Sea Ice
Time series from 2008 deployments in northern Alaska
The animated map depicts weekly locations of satellite tagged Spectacled Eiders and sea ice distribution.
Time series from 2008 deployments in northern Alaska
The animated map depicts weekly locations of satellite tagged Spectacled Eiders and sea ice distribution.
ABSTRACT.-The at-sea distribution of the threatened Spectacled Eider (Somateria fischeri) has
remained largely undocumented. We identified migration corridors, staging and molting areas, and
wintering areas of adult Spectacled Eiders using implanted satellite transmitters in birds from
each of the three extant breeding grounds (North Slope and Yukon-Kuskokwim Delta in Alaska and
arctic Russia). Based on transmitter locations, we conducted aerial sur veys to provide visual
Population delineation and wintering ecology of Surf Scoters have been studied in detail through much of their range. A conspicuous gap exists for Southeast Alaska, which is near the northern end of their winter distribution.
Žydelis, R., D. Esler, M. Kirk, and W. S. Boyd. 2009. Effects of off-bottom shellfish aquaculture on winter habitat use by molluscivorous sea ducks. Aquatic Conservation: Marine and Freshwater Ecosystems 19:34-42.
The interaction between off bottom suspended Oyster farming and wintering seaducks.
Connectivity among annual cycle stages, rates of site fidelity, and the geographic scale of dispersal are largely unknown for Pacific Barrow’s Goldeneye (BAGO). This precludes managers and researchers from identifying demographically discrete units for population management, and for understanding the scale of inference from field studies. Further, habitats and specific sites that may be particularly important for BAGO are difficult to identify, as this species is not well covered by surveys for most of its annual cycle and range.
The Centre for Wildlife Ecology has several studies underway that address conservation issues affecting sea ducks along the Pacific coast. The issues, species, and populations being studied are shared concerns of the Centre for Wildlife Ecology, the Canadian Wildlife Service, and agency and academic collaborators throughout North America.
Sea duck Bibliography as compiled by Dan Esler
The Condor 100:551-555 © The Cooper Ornithological Society 1998
A small population of moulting and wintering Harlequin ducks were monitored between July 1994 and May 1995 near White Rock, B.C. In all 72 birds were captured during the wing moult and were banded with individually identifiable coloured tarsal bands. Males arrived in mid-June, moulted in August, and were in their alternate plumage by early October. Females arrived in mid-August and moulted in September. There were three patterns of habitat use over the winter season; some individuals spent the entire period (Aug.