Nesting island study progress report / Jean-Francois Giroux.
Material type:
TextPublication details: Winnipeg, MB : 1980-81. Ducks Unlimited Canada,Description: 3 v. (various pagings) ill. ,maps ; 28 cmOnline resources: Abstract: In 1979, the use of earthen islands by nesting waterfowl was evaluated on 147 islands (representing 16 ha) located in 14 projects in Manitoba,Saskatchewan, and Alberta. A total of 184 duck nests and 53 Canada goose (Branta canadensis) nests were found on the islands searched. Nesting density of ducks ranged from 0 to 31.6 nests/ha (12.8 nests/ac) and averaged 11.5 nests/ha (4.7 nests/ac). The islands studied represented a wide spectrum of island types and conditions. Nesting success averaged 57% which is low compared to success rates reported on natural islands.Mallard (Anas plathyrhynchos), gadwall (A. strepera), and lesser scaup (Aythya affinis) were the most common species to initiate nests on the islands. Presence of attractive vegetative cover such as forbs and the distance of islands from shore were important in influencing use of the islands. As in 1978, the greatest nesting density was found at Oak Hammock Marsh (31.6 nests/ha - 12.8 nests/ac) and the North cell was more pro
| Item type | Current library | Collection | Call number | Status | Notes | Date due | Barcode |
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Electronic Report
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Electronic Library | Non-fiction | GIR (Browse shelf(Opens below)) | Available | 1980 Progress Report Dated March 1981 | 15535 | |
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Electronic Report
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Electronic Library | Non-fiction | GIR (Browse shelf(Opens below)) | Available | 1978 Report | 15536 | |
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Electronic Report
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Electronic Library | Non-fiction | GIR (Browse shelf(Opens below)) | Available | Progress Report Dated March 1980 | 1016 |
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Includes bibliographical references.
In 1979, the use of earthen islands by nesting waterfowl was evaluated on 147 islands (representing 16 ha) located in 14 projects in Manitoba,Saskatchewan, and Alberta. A total of 184 duck nests and 53 Canada goose (Branta canadensis) nests were found on the islands searched. Nesting density of ducks ranged from 0 to 31.6 nests/ha (12.8 nests/ac) and averaged 11.5 nests/ha (4.7 nests/ac). The islands studied represented a wide spectrum of island types and conditions. Nesting success averaged 57% which is low compared to success rates reported on natural islands.Mallard (Anas plathyrhynchos), gadwall (A. strepera), and lesser scaup (Aythya affinis) were the most common species to initiate nests on the islands. Presence of attractive vegetative cover such as forbs and the distance of islands from shore were important in influencing use of the islands. As in 1978, the greatest nesting density was found at Oak Hammock Marsh (31.6 nests/ha - 12.8 nests/ac) and the North cell was more pro