Mallard releases in understocked prairie pothole habitat / Richard A. Sellers.
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TextPublication details: Madison, WI : University of Wisconsin, 1971.Description: 32 leaves ; 28 cmOnline resources: Abstract: In 1969 and 1970, 821 and 653 young female mallards (Anas platyrhynchos)respectively were marked with nasal saddles and released near Minnedosa,Manitoba, to increase the breeding population and production. Of the ducks released in 1969, 111+-13 returned the next spring to breed on the 4-square mile release area; and an estimated 97 others nested off the area. In 1970 the center 1 square mile of the release area, where 78% of the ducklings were stocked in 1969, had the highest mallard density (59 pairs per square mile) ever recorded in the Minnedosa region. The remaining 3 square miles averaged 42 mallard pairs per square mile. The density and percentage of marked hens decreased with distance from the center of the release area. Only 16 mallard pairs per square mile were found on the nearby control area where no ducklings were liberated.Twelve percent of the mallard hens on the release area produced broods in 1970. This was significantly lower (P<0.05) than the 28% success for malla
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Thesis(M.S.)--University of Wisconsin, 1971.
Includes bibliographical references (leaves 31-32).
In 1969 and 1970, 821 and 653 young female mallards (Anas platyrhynchos)respectively were marked with nasal saddles and released near Minnedosa,Manitoba, to increase the breeding population and production. Of the ducks released in 1969, 111+-13 returned the next spring to breed on the 4-square mile release area; and an estimated 97 others nested off the area. In 1970 the center 1 square mile of the release area, where 78% of the ducklings were stocked in 1969, had the highest mallard density (59 pairs per square mile) ever recorded in the Minnedosa region. The remaining 3 square miles averaged 42 mallard pairs per square mile. The density and percentage of marked hens decreased with distance from the center of the release area. Only 16 mallard pairs per square mile were found on the nearby control area where no ducklings were liberated.Twelve percent of the mallard hens on the release area produced broods in 1970. This was significantly lower (P<0.05) than the 28% success for malla