| Migration and Habitat Use of Pacific Barrow's Goldeneye |
Principal Investigators Sean Boyd, Science
and Technology Branch, Environment Canada, 5421 Robertson
Road, Delta, BC Dan Esler, Centre
for Wildlife Ecology, Simon Fraser University,
5421 Robertson Road, Delta,
BC
Research Partners Tim Bowman, Sea Duck Joint Venture, U.S. Fish and Wildlife Service, 1011 E. Tudor Rd., Anchorage, AK Jonathan E. Thompson, Ducks Unlimited Canada, #200-10720 178 Street, Edmonton, AB
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Introduction 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 researchers from
identifying demographically discrete units for population management
and 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.
This
project aims to fill the above information gaps by using
satellite
telemetry. More specifically,
our
research addresses the following questions: 1) What are the rates, and geographic scale, of
inter-annual site fidelity by all sex and age classes at various stages
of the annual cycle? 2) Do birds from the same breeding site occur in
discrete areas during winter, or are they widely distributed, and vice
versa? 3) How do the answers to 1 and 2 above combine to
indicate demographically distinct management units? 4) Are there important habitats or specific sites
that are used by a large proportion of marked birds, which would indicate their
value for conservation?
From 2006 to 2011, we deployed over 200 satellite transmitters (PTTs) on
BAGO at 4 sites as described in the table below and shown in the maps. Follow
the links at the top of this page to view maps depicting the migratory routes of BAGO tagged at
each site. Maps describing individual migrations and cohort summaries are presented.
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| Location | Season | Age + Sex | Month | Years |
| Riske Creek, BC | Breeding | Adult males | May | 2006, 2007, 2008 | | | Adult females | Jul | 2008, 2009 | | | Hatch-Year males + females | Jul, Aug | 2008, 2009, 2011 |
| Indian Arm, BC | Wintering | Adult males + females | Feb, Apr | 2007, 2011 |
| Cardinal Lake, AB | Molting | Adult males | Aug | 2009, 2010 |
| Prince William Sound, AK | Wintering | Adult males + females | Mar | 2009 |
Acknowledgements We
thank the following individuals for their time, and help during
captures: Eric Anderson, David Bradbeer, Rob Butler, Shanti
Davis, Rian Dickson, Ty Donnelly, Garry Grigg, Sharon
Henry, Danica Hogan, Ryan Hermanutz, Joe and Ellie Jaschke and family,
Rod MacVicar, Jamie McDonald, Rod MacVicar, Mark Maftei, Mike
Merriam, James Olsen, Eric Palm, Julie Pierce, Jennifer
Provencher, Dean Rand, John Reed, Andrew Robinson, Dan Shervill,
Robb Stavne, Krystal Tangen, Brian Uher-Koch, Corey Van Stratt,
Melanie Wilson,
Ken Wright, Chris Wohl, and Robyn Worcester.
We
thank the Canadian Dept. of National Defense for access to their
training area at Riske Creek, BC, and Rod MacVicar for allowing us to
use the Reed Point Marine Education Centre facilities to conduct
surgeries.
Surgery and Veterinarian Services: Dr. Malcolm McAdie, DVM
Data download and storage: Sandi Lee, CWS, Environment Canada
Map creation, spatial analysis, and website design: Jennifer Barrett, Centre for Wildlife Ecology
Photo credits: Ted Smith, Theodore Smith Photography (website); Danica Hogan, Centre for Wildlife Ecology; Sean Boyd, Science
and Technology Branch, Environment Canada
This
study is dedicated to Jean-Pierre Savard (JPS) and Garry Grigg (GG).
JPS studied the territorial behavior of Pacific Barrow's Goldeneye and
often speculated on their post-breeding movements. GG was instrumental
in developing capture techniques on both the breeding and wintering
grounds.
The following agencies provided funding and/or support for the project: |
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