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Lake Manitoba

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Grebe Survey Summary

  • Max Adults: 5798
  • Year: 2011
  • Most Recent Adults: 934
  • Year: 2017
  • Survey Type: Shore; Boat; Air
  • Most Common Threats Reported: Water too low; lack of/poor nesting habitat; wind/wave inundation; egg predation; chick predation; adult predation; lack of fish food; human/development/boat disturbance; mortality from fishing/nets/barriers; destruction from fish; nest abandonment; invasive species; nest parasitism
Lake name:
Lake Manitoba
Location:
Manitoba
HydroLAKE ID:
53
Latitude:
51.587865
Longitude:
-98.728778
Surface area (km2):
4751.1
Basin type:
non-reservoir
Motor restrictions:
partial
Motor restrictions notes:
in Delta Marsh: by permit to researchers
Primary emergent vegetation:
Typha bulrush Scirpus Schoenoplectus
Primary vegetation for nesting:
bulrush (Schoenoplectus spp.) bulrush phragmites
Management agency:
Province of Manitoba
Region associations:
Lake Manitoba Drainage Basin; Interlake Region
Comments:
Lake Manitoba is the third largest lake in Manitoba and is part of a large watershed that occupies a large portion of this province and into Saskatchewan. It is part of the Interlakes Region that includes other significant lakes such as Lake Winnipeg and Lake Winnipegosis. Lake Manitoba is very large and surveys were conducted for portions of the lake only. Clustered locations were compiled together but more distinct parts of the lake were entered as seperate entries. See individual entries for more details. This entry compiles individual entries for Lake Manitoba into one total entry for indexing purposes.

Surveys (1)

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
    1970, 1990
  • Source
    Report
  • Both Western and Clarks?
    N
Count Type Range Max Year
Max Adults 1 to 100 100 1970-1990
Most Recent Adults 1 to 100 ? 1990
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.4, estimated number of breeding Western grebes during nesting period based on mazimum observed count from 1970 to 1990 (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.

Sources of Information

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