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Effect of a commonly-used nest marker on nest success of ducks in prairie Canada

Canadian Field-Naturalist

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Abstract

We evaluated the effect of a flagged-stake marker on success of duck nests in the prairie pothole region of Canada, and whether abundance of American Crows (Corvus brachyrhynchos) influenced results. We marked 565 nests with flagged-stake markers and 573 in relation to natural objects (e.g., rock, tree, fence-post). We detected no difference in average daily survival rates between nests with flagged vs. natural markers (Xi?? = 3.37, 1 df, P = 0.07). Success rates averaged 10% for nests with flagged markers and 6% for nests with natural markers. The direction of the difference was consistent among areas and years (Xi?? = 19.9, 17 df, P = 0.28). We detected no correlation among areas and years between indices of American Crow abundance and differences in daily survival rates between nests with flagged markers and nests with natural markers (r = 0.02, 37 df, P = 0.91).

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effect of a commonly-used nest marker on nest success of ducks in prairie Canada
Series title:
Canadian Field-Naturalist
Volume
109
Issue:
4
Year Published:
1995
Language:
English
Description:
p. 437-440
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Field-Naturalist
First page:
437
Last page:
440