Factors Associated with Duck Nest Success
in the Prairie Pothole Region of Canada
Definition
We collected data on 17 areas during 1982-85, 9 in parkland and 8 in prairie (Table 1; Fig. 1; see Millar [1982, 1983, 1984] and Sargeant et al. [1993] for additional description of areas). A study area was 1.6 km wide by 16.0 km long with a road or trail extending lengthwise through it; each study area consisted of 40 legal quarter-sections (64.8 ha each) (Fig. 1 inset). A study area was superimposed on the air-to-ground comparison segment (hereafter called air-ground segment) of a 0.4-km-wide transect surveyed annually from aircraft by CWS and USFWS during the Waterfowl Breeding Ground Survey (Martin et al. 1979). Counts of ducks made from the ground on air-ground segments are used to adjust counts made from aircraft. We refer to 1 area studied for 1 year as an "area-year." We divided each study area into 1.6-km-wide by 8.0-km-long halves so we could estimate and examine variability of some parameters within, as well as among, study areas. We refer to one-half of an area studied for 1 year as a "half-area-year."
| Study area name | Location | Year | |||
| Section | Townshipb | Rangec | Meridian | ||
| Parkland | |||||
| Earl Grey, Sask. | 4 | 23N | 20W | Second | 1985 |
| Hanley, Sask. | 16 | 31N | 3W | Third | 1982-85 |
| Hay Lakes, Alta. | 4 | 49N | 21W | Fourth | 1983-84 |
| Holden, Alta. | 6 | 49N | 14W | Fourth | 1983 |
| Inchkeith, Sask. | 18 | 13N | 5W | Second | 1984-85 |
| Leask, Sask. | 4 | 47N | 5W | Third | 1984-85 |
| Moore Park, Manit. | 9 | 13N | 19W | Principal | 1983-84 |
| Penhold, Alta. | 4 | 37N | 2W | Fifth | 1984- 85 |
| Yorkton, Sask. | 14 | 26N | 9W | Second | 1985 |
| Prairie | |||||
| Cartwright, Manit. | 21 | 1N | 17W | Principal | 1983 |
| Ceylon, Sask. | 27 | 5N | 21W | Second | 1983-84 |
| Craik, Sask. | 15 | 24N | 2W | Third | 1984-85 |
| Denzil, Sask. | 2 | 38N | 25W | Third | 1984-85 |
| Gayford, Alta. | 5 | 27N | 26W | Fourth | 1985 |
| Goodwater, Sask. | 30 | 5N | 14W | Second | 1983 |
| Shamrock, Sask. | 4 | 15N | 6W | Third | 1982-85 |
| Tichfield, Sask. | 30 | 26N | 10W | Third | 1982 |
| aCenter of west end
of a study area is located at the southwest corner of the designated section,
except on Moore Park and Cartwright study areas where the center of
west end is at the southwest corner of the southeast quarter of the designated
section. bAll townships locations are north (N) of the base line at 49° north latitude. cRange locations are west (W) of the designated meridian. All meridians are west of the Principal Meridian at 97°27'43" west longitude. |
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