Saskatchewan
View Surveys (1)
View Sources (1)
Grebe Survey Summary
- Max Adults: 2421
- Year: 2002-2012
- Most Recent Adults: ?
- Year: 2012
- Survey Type: Shore; Boat; Air
- Most Common Threats Reported: N/A
- Lake name:
- Saskatchewan
- Location:
- Saskatchewan
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
2002, 2012 -
Source
Report -
Both Western and Clarks?
N
| Count Type | Range | Max | Year |
|---|---|---|---|
| Max Adults | >1000 | 2421 | 2002-2012 |
| Most Recent Adults | 1 to 100 | ? | 2012 |
| 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:
Estimate of breeding Western grebe population in Saskatchewan using data from 2002 to 2012. Adults were either directly counted or the number of active nests were doubled (Beyersbergen and Calvert 2008; Wollis and Stratmoen 2010) and counts of adults on lakes without breeding observed were included (Wilson and Smith 2013). Provincial estimates are the averages of summing the most recent surveys of all colonies, summing the second most recent surveys (or most recent survey), and summing the average colony abundance of 2002 to 2012 (one to three surveys) (Wilson and Smith 2013). No trend data available for this province and surveys prior to 2008 were limited for appropriate comparisons with current estimates (Wilson and Smith 2013).