Effects of habitat edges and agricultural practices on waterfowl nest predation in a fragmented prairie landscape / Maria Pasitschniak-Arts
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TextPublication details: Saskatoon, SK : University of Saskatchewan, 1995.Description: xv, 137 leaves : ill. ; 29 cmOnline resources: Abstract: First, I tested the hypothesis that predation on artificial waterfowl nests was influenced by proximity to edge in different habitat types in the intensively farmed prairie region of Thickwood Hills, Saskatchewan.Data from dense nesting cover revealed higher nest predation near edges compared with the habitat interior, supporting the edge effect hypothesis. Predation risk was not related to distance (0-150 m) from habitat edge in idle pasture or delayed hay fields. Nest survival was heterogeneous within the 4-week sampling period with nests exhibiting increased survival with time of exposure. Nest survival also differed among habitat types. Daily survival rates were highest in dense nesting cover and delayed hay, while idle pasture and rights-of-way exhibited similar but lower nest success. Nest survival was higher in Spring than in Summer in one out of three years. In all years and habitats,significantly more mammals than birds depredated waterfowl nests, and the striped skunk (Mep
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Thesis(Ph.D.)--University of Saskatchewan, 1995.
First, I tested the hypothesis that predation on artificial waterfowl nests was influenced by proximity to edge in different habitat types in the intensively farmed prairie region of Thickwood Hills, Saskatchewan.Data from dense nesting cover revealed higher nest predation near edges compared with the habitat interior, supporting the edge effect hypothesis. Predation risk was not related to distance (0-150 m) from habitat edge in idle pasture or delayed hay fields. Nest survival was heterogeneous within the 4-week sampling period with nests exhibiting increased survival with time of exposure. Nest survival also differed among habitat types. Daily survival rates were highest in dense nesting cover and delayed hay, while idle pasture and rights-of-way exhibited similar but lower nest success. Nest survival was higher in Spring than in Summer in one out of three years. In all years and habitats,significantly more mammals than birds depredated waterfowl nests, and the striped skunk (Mep