| Abstract: | A brief summary of the annual cycle of the American Black duck (Anas rubripes) is presented. The history of the American black duck population is tracked by the Mid-Winter Index (MWI) and related to annual harvest. Previous to effective restrictions in the United States in 1982 and later in Canada, the MWI was declining significantly at about 4% annually. Since restrictions were established the black duck population has stabilized, but to reach the goal of 260,000 wintering black ducks in the Atlantic Flyway continued or even more restrictions will be necessary. If the number of breeding pairs can be increased from current levels the black duck population is expected to increase. |
| Genre: | Book chapter |
| ProdID: | 5210873 |
| Citation Author: | Longcore, J.R.; Clugston, D.A. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Editor: | Mac, Michael J.; Opler, Paul A.; Puckett Haecker, Catherine E.; Doran, Peter D. (editors) |
| Citation End Page: | 200 |
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| Citation Language: | English |
| Citation Larger Work Title: | Status and Trends of the Nation's Biological Resources. Volume 1. |
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| Citation Publisher: | U.S. Department of the Interior, U.S. Geological Survey |
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| Citation Search Results Text: | American Black Duck; 1998; Book chapter; Status and Trends of the Nation‘s Biological Resources. Volume 1.; Longcore, J.R.; Clugston, D.A. |
| Citation Start Page: | 198 |
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| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | American Black Duck; 1998; Book chapter; Status and Trends of the Nation‘s Biological Resources. Volume 1.; Longcore, J.R.; Clugston, D.A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
| Publisher: | U.S. Department of the Interior, U.S. Geological Survey |
