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Duck Nesting and Production on Wisconsin Farmlands

John M. Gates
The Journal of Wildlife Management
Vol. 29, No. 3 (Jul., 1965), pp. 515-523
Published by: Wiley on behalf of the Wildlife Society
DOI: 10.2307/3798050
Stable URL: http://www.jstor.org/stable/3798050
Page Count: 9
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Duck Nesting and Production on Wisconsin Farmlands
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Abstract

Duck-nesting studies were made from 1959 through 1963 on a 7-square-mile study area in east-central Wisconsin. Breeding populations of mallards (Anas platyrhynchos) and blue-winged teals (A. discors) combined averaged 7.6 pairs per square mile per year. Wetlands and hayfields were the primary cover types used for nesting. Total hatching success was 32 percent for the 5-year period. Production was estimated to average about four broods per square mile per year. Low brood survival, associated with a deficiency of adequate brood habitat, appeared to be an important limitation to duck production in 4 of the 5 years of the study.

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