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5 results for “American black duck”
Stable-isotopes (δ2H, δ13C) within feathers from harvested American black ducks (2017-2020)
<p>Stable isotope data from American Black Duck feathers (n = 665) and associated harvest data. The first primary feather (P1) was collected from wings submitted to the Species Composition Survey in Canada and Parts Collection Survey in the United States. From available feathers, we selected individuals for stable-isotope analysis stratified by black duck conservation region, sex, age, and date of harvest, where possible. These data are those that were selected for stable-hydrogen isotope analysis. See Kusack et al. (in press) - 'Origins of harvested American black ducks: stable isotopes support the flyover hypothesis' for additional information on our use of this data.</p>
Stable-isotopes (δ2H, δ13C) within feathers from harvested American black ducks (2017-2020)
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American black duck PTT data from Atlantic Canada
<p><span>American black ducks, native to eastern North America, have been the focus of significant international conservation and management programs. The combined USA and Canadian population has traditionally been managed as a single population; however black duck demographics may vary by region. To help understand potential regional differences in black ducks, we used satellite telemetry to assess migratory chronology and movements of black ducks wintering near Windsor, Nova Scotia, Canada, near the northern limits of their wintering range where numbers are increasing. Wintering black ducks from Nova Scotia did not leave the Atlantic Flyway and included both longer-distance migrants (~ 1 500 km north) and locally-breeding individuals. None of our tracked ducks travelled south of Nova Scotia during any part of the annual cycle, indicating a population segment that never leaves Canada and is subject solely to Canadian harvest pressures. Band recovery data revealed that a small portion (2.4%) of black ducks originally banded during winter in Nova Scotia were recovered south along the east coast of the USA, indicating that some of these black ducks are subject to international harvest pressures. Our results show that there are differences in annual black duck movements even within a small part of their range, adding to the growing evidence that black duck populations show fine-scale temporal and spatial structure. This structure will need to be considered in future interprovincial and international harvest management plans of this important species.</span></p>
Data from: Idenitfying hybrids & the genomics of hybridization: mallards & American black ducks of Eastern North America
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American black duck PTT data from Atlantic Canada
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