Northern Prairie Wildlife Research Center
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| Fig. 1. Temporary and seasonal pond density (ponds/km2) in relation to total pond density on 9 study areas in eastern North Dakota and westcentral Minnesota during 1987-91. |
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| Fig. 2. Model describing settling patterns of mallard pairs in prairie pothole habitat in eastern North Dakota during May relative to percent of landscape in cropland interacting with temporary/seasonal pond area. Breeding pairs (Y) = 4.46 + 0.72 (pond area) + 0.0016 (% cropland) - 0.0069 (pond area x % cropland). |