Waterfowl: Population Status, 2011
In the traditional survey area, which includes strata 1-18, 20-50, and 75-77, the total duck population estimate was 45.6 ± 0.8 [SE] million birds. This estimate represents an 11% increase over last year's estimate of 40.9 ± 0.7 million birds and was 35% above the long-term average (1955-2010)....
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ftunivnebraskali:oai:digitalcommons.unl.edu:usfwspubs-1289 2023-11-12T04:23:19+01:00 Waterfowl: Population Status, 2011 Fleming, Kathy Garrettson, Pamela Rhodes, Walt Zimpfer, Nathan 2011-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usfwspubs/290 https://digitalcommons.unl.edu/context/usfwspubs/article/1289/viewcontent/2011WaterfowlStatusReport.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usfwspubs/290 https://digitalcommons.unl.edu/context/usfwspubs/article/1289/viewcontent/2011WaterfowlStatusReport.pdf US Fish & Wildlife Publications text 2011 ftunivnebraskali 2023-10-30T11:02:17Z In the traditional survey area, which includes strata 1-18, 20-50, and 75-77, the total duck population estimate was 45.6 ± 0.8 [SE] million birds. This estimate represents an 11% increase over last year's estimate of 40.9 ± 0.7 million birds and was 35% above the long-term average (1955-2010). Estimated mallard (Anas platyrhynchos) abundance was 9.2 ± 0.3 million birds, which was 9% above the 2010 estimate of 8.4 ± 0.3 million birds and 22% above the long-term average. Estimated abundance of gadwall (A. strepera; 3.3 ± 0.2 million) was similar to the 2010 estimate and 80% above the long-term average. Estimated abundance of American wigeon (A. americana; 2.1 ± 0.1 million) was 14% below the 2010 estimate and 20% below the long-term average. The estimated abundance of green-winged teal (A. crecca) was 2.9 ± 0.2 million, which was 17% below the 2010 estimate and 47% above their long-term average. The estimate of blue-winged teal abundance (A. discors) was 8.9 ± 0.4 million, which was 41% above the 2010 estimate and 91% above their long-term average. The estimate for northern pintails (A. acuta; 4.4 ± 0.3 million) was 26% above the 2010 estimate, and similar to the long-term average. The northern shoveler estimate (A. clypeata) was 4.6 ± 0.2 million, which was 14% above the 2010 estimate and 98% above the long-term average. Redhead abundance (Aythya americana; 1.4 ± 0.1 million) was 27% above the 2010 estimate and 106% above the long-term average. The canvasback estimate (A. valisineria; 0.7 ± 0.05 million) was similar to the 2010 estimate and 21% above the long-term average. Estimated abundance of scaup (A. affinis and A. marila combined; 4.3 ± 0.3 million) was similar to that of 2010 and 15% below the long-term average of 5.1 ± 0.05 million. Habitat conditions during the 2011 Waterfowl Breeding Population and Habitat Survey were characterized by average to above-average moisture and a normal winter and spring across the traditional and eastern survey areas. The exception was the west-central portion of the ... Text Northern Shoveler Shoveler University of Nebraska-Lincoln: DigitalCommons@UNL Canada |
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Open Polar |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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ftunivnebraskali |
language |
unknown |
description |
In the traditional survey area, which includes strata 1-18, 20-50, and 75-77, the total duck population estimate was 45.6 ± 0.8 [SE] million birds. This estimate represents an 11% increase over last year's estimate of 40.9 ± 0.7 million birds and was 35% above the long-term average (1955-2010). Estimated mallard (Anas platyrhynchos) abundance was 9.2 ± 0.3 million birds, which was 9% above the 2010 estimate of 8.4 ± 0.3 million birds and 22% above the long-term average. Estimated abundance of gadwall (A. strepera; 3.3 ± 0.2 million) was similar to the 2010 estimate and 80% above the long-term average. Estimated abundance of American wigeon (A. americana; 2.1 ± 0.1 million) was 14% below the 2010 estimate and 20% below the long-term average. The estimated abundance of green-winged teal (A. crecca) was 2.9 ± 0.2 million, which was 17% below the 2010 estimate and 47% above their long-term average. The estimate of blue-winged teal abundance (A. discors) was 8.9 ± 0.4 million, which was 41% above the 2010 estimate and 91% above their long-term average. The estimate for northern pintails (A. acuta; 4.4 ± 0.3 million) was 26% above the 2010 estimate, and similar to the long-term average. The northern shoveler estimate (A. clypeata) was 4.6 ± 0.2 million, which was 14% above the 2010 estimate and 98% above the long-term average. Redhead abundance (Aythya americana; 1.4 ± 0.1 million) was 27% above the 2010 estimate and 106% above the long-term average. The canvasback estimate (A. valisineria; 0.7 ± 0.05 million) was similar to the 2010 estimate and 21% above the long-term average. Estimated abundance of scaup (A. affinis and A. marila combined; 4.3 ± 0.3 million) was similar to that of 2010 and 15% below the long-term average of 5.1 ± 0.05 million. Habitat conditions during the 2011 Waterfowl Breeding Population and Habitat Survey were characterized by average to above-average moisture and a normal winter and spring across the traditional and eastern survey areas. The exception was the west-central portion of the ... |
format |
Text |
author |
Fleming, Kathy Garrettson, Pamela Rhodes, Walt Zimpfer, Nathan |
spellingShingle |
Fleming, Kathy Garrettson, Pamela Rhodes, Walt Zimpfer, Nathan Waterfowl: Population Status, 2011 |
author_facet |
Fleming, Kathy Garrettson, Pamela Rhodes, Walt Zimpfer, Nathan |
author_sort |
Fleming, Kathy |
title |
Waterfowl: Population Status, 2011 |
title_short |
Waterfowl: Population Status, 2011 |
title_full |
Waterfowl: Population Status, 2011 |
title_fullStr |
Waterfowl: Population Status, 2011 |
title_full_unstemmed |
Waterfowl: Population Status, 2011 |
title_sort |
waterfowl: population status, 2011 |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
2011 |
url |
https://digitalcommons.unl.edu/usfwspubs/290 https://digitalcommons.unl.edu/context/usfwspubs/article/1289/viewcontent/2011WaterfowlStatusReport.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Northern Shoveler Shoveler |
genre_facet |
Northern Shoveler Shoveler |
op_source |
US Fish & Wildlife Publications |
op_relation |
https://digitalcommons.unl.edu/usfwspubs/290 https://digitalcommons.unl.edu/context/usfwspubs/article/1289/viewcontent/2011WaterfowlStatusReport.pdf |
_version_ |
1782338138870382592 |