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Coal Lake

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Grebe Survey Summary

  • Max Adults: 6
  • Year: 2004
  • Most Recent Adults: ?
  • Year: 2011
  • Survey Type: Shore; Boat; Air
  • Most Common Threats Reported: N/A
Lake name:
Coal Lake
Location:
Alberta
Latitude:
53.0747222
Longitude:
-113.2713889
Surface area (km2):
10.9
Basin type:
non-reservoir
Dam completion date:
1972
Management agency:
Alberta Environment; Alberta Parks
Region associations:
Coal Lake North Provincial Recreation Area
Designations:
Recreation Area
Comments:
Used for water supply for Wetaskiwin and to augment river flow into Battle River during droughts.

Surveys (2)

Survey Citation:
COSEWIC. 2014. COSEWIC assessment and status report on the western grebe (Aechmophorus occidentalis) in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. 55 pp. www.registrelep-sararegistry.gc.ca/default_e.cfm

  • Type
    shore; boat; air
  • Time period
    1991, 2011
  • Source
    Report
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults 1 to 100 6 1991-2011
Most Recent Adults 1 to 100 ? 2011
Max Nests N/A N/A N/A
Most Recent Nests N/A N/A N/A
Max Chicks N/A N/A N/A
Most Recent Chicks N/A N/A N/A

Comments:

From Table A.2, maximum counts of breeding Western grebes from surveys mostly conducted during nesting season from June and July from 1991 to 2011 (sourced from Wilson, A. and Smith, P.A. 2013. Distribution and population status of Western Grebes in Canada. Unpublished report for the Canadian Wildlife Service). No break out of data per year or other details.

Survey Citation:
Erickson, M. E. 2010. Persistence and abundance of the western grebe in Alberta. Dissertation. University of Alberta. Edmonton, Alberta, Canada. Same lakes and abundance estimated were checked against Erickson, M. E., C. Found-Jackson, and M. S. Boyce. 2017. Habitat associations with counts of declining western grebes in Alberta, Canada. Avian Conservation and Ecology. 12(1):12. Appendix to Erickson et al 2014 is unavailable but presumed to be the same list of lakes and abundance estimates.

  • Type
    shore
  • Time period
    3 June 2008, 13 August 2008
  • Source
    Dissertation
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults 1 to 100 6 2004
Most Recent Adults 0 0 2008
Max Nests N/A N/A N/A
Most Recent Nests N/A N/A N/A
Max Chicks N/A N/A N/A
Most Recent Chicks N/A N/A N/A

Comments:

From Table B.1 and Table C.1, survey methods and dates for 2008 field season, and latest abundance estimate from 2008, compared to maximum abundance estimate. Source of maximum abundance estimate is from 2004 sourced from Alberta Sustainable Resource Development Species at Risk (SAR) #94. I didn't include maximum abundance estimate as part of the survey date for Erickson's surveys.

Sources of Information

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