Habitat use and productivity of canvasbacks in southwestern Manitoba, 1961-72
U.S. Dept. of the Interior, Fish and Wildlife Service, 1982 - Nature - 31 pages
A study of canvasback (Aythya valisineria) breeding populations, nest success, productivity, and habitat requirements was conducted from 1961 to 1972 on a 181.3 square kilometer area south of Minnedosa, Manitoba.
What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
12-year period aspen parklands average number Aythya Bartonek birds Black tern Blue-winged teal breeding pairs breeding populations broods counted canvasback broods canvasback eggs canvasback hens canvasback nests Canvasback pair cattail cover type density drainage drakes drought ducks Dzubin early nesting emergent vegetation grassland habitat habitat types hardstem bulrush Juvenile mortality km2 Mean Land use type Lousana Manitoba Mean Per km2 Mean yearly number Minnedosa area Minnedosa District Minnedosa study area nest cover Nest data nest losses nest success nesting attempts nesting season Newdale number and area number of redhead Olson overwater nest parasitism by redheads pasture pond Prairie Pothole Region predation raccoons redhead ducklings redhead eggs renesting effort roadside transects Roseneath Ruddy duck shoreline south of Minnedosa species Stoudt success of canvasbacks Table 30 tion Type 5 wetlands U.S. Fish Wildl Ungrazed grassland Ungrazed woodland water levels waterfowl weather Wetland type wetlands wetlands on transects whitetop Willows