Utilization of nesting islands by waterfowl in North Dakota / Mark Allan Willms.
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TextPublication details: Grand Forks, ND : University of North Dakota, 1985.Description: xi, 68 leaves : ill. , map ; 28 cmOnline resources: Abstract: The ure of artificially constructed islands for nesting waterfowl has recently gained attention as a management technique for increasing local populations on the northern prairies which are otherwise declining.However, little quantitative information is available indicating which design features of these islands might best enable them to achieve their full potential. Waterfowl nesting on one natural and 21 artificial islands located in Pool 326 of the J. Clark Salyer National Wildlife Refuge (NWR) in North Dakota were studied from 1982-1983. A total of 286 duck nests of seven species were located, with gadwall (Anas strepara),mallard (A. platyrhynchos), and blue-winged teal (A. discors)representing over 90% of all nests discovered. Mean annual waterfowl densities were 8.7 nests/ha with an average Mayfield corrected hatching success of 24%, resulting in an annual duckling production of 27 birds/ha. Several physical and vegetative characteristics of these islands were quantified in o
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Thesis(M.S.)--University of North Dakota, 1985.
Includes bibliographical references (leaves 66-68).
The ure of artificially constructed islands for nesting waterfowl has recently gained attention as a management technique for increasing local populations on the northern prairies which are otherwise declining.However, little quantitative information is available indicating which design features of these islands might best enable them to achieve their full potential. Waterfowl nesting on one natural and 21 artificial islands located in Pool 326 of the J. Clark Salyer National Wildlife Refuge (NWR) in North Dakota were studied from 1982-1983. A total of 286 duck nests of seven species were located, with gadwall (Anas strepara),mallard (A. platyrhynchos), and blue-winged teal (A. discors)representing over 90% of all nests discovered. Mean annual waterfowl densities were 8.7 nests/ha with an average Mayfield corrected hatching success of 24%, resulting in an annual duckling production of 27 birds/ha. Several physical and vegetative characteristics of these islands were quantified in o