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Showing 1 to 5 of 5 for “"duck pairs"”.
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Impacts of Wetland Characteristics on Duck Use in the Prairie Pothole Region (PPR) 1987-2013
… the influence of local and landscape factors on duck pair densities. Local factors are attributes immediately adjacent to, or within, an individual wetland that affect wetland appearance or function. Landscape factors represent wetland functions within varying compositions of upland cover types …
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An Assessment of Wood Duck Distribution, Abundance and Riparian Breeding Pair Habitats in South Dakota
… managers are working to reverse this trend. One duck species that has historically responded well to harvest and habitat management is the wood duck (Aix sponsa). Wood ducks were nearly exterminated in the early 1900's as a result of unregulated harvest and habitat destruction. Since passage of …
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Breeding Waterfowl Populations in South Dakota
… in 1973 and 1974. Densities of total breeding pairs averaged 5.58 and 2.30 pairs per km2 in 1973 and 1974, respectively. Estimated populations based upon these densities were 1,067,500 breeding pairs in 1973 and 439,600 breeding pairs in 1974. The 58.8 percent decrease in the population …
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An Evaluation of Waterfowl Production Surveys in Eastern South Dakota, 1995
… the quality of aerial surveys of spring breeding duck populations and water conditions in the prairie pothole region. In contrast, little research time has been done in relation to validating the quality of the July aerial brood surveys which do not have a ground-truth compliment similar to the …
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Biotic Responses on Typha-monodominant Semipermanent Wetlands To Cattle Grazing
… in semi-permanent wetlands to improve breeding duck habitat. Plots (.81 ha) were established in the emergent zone in each of two wetlands (≤ 4 ha) in the vicinity of Waubay National Wildlife Refuge, Waubay, South Dakota. Ten yearling, crossbred steers were allowed to graze the plots for 28 days …