Black and white-winged scoters are not federally listed species but are protected under the
Migratory Bird Treaty Act. The North American Waterfowl Management Plan (2004) lists all
scoter species as decreasing in numbers in North America.
Condor Nov-Dec 62(6). Papers in Ornithology, Paper 70
North American populations of breeding surf scoters and long-tailed ducks appear to be decreasing. Along the Atlantic coast, wintering populations of surf scoters are suspected to be decreasing, while the status of wintering populations of long-tailed ducks remains unknown. These trends have led conservation organizations to assign a "high" relative conservation priority to both species.
Ornis Scandinavica 19: 249-256
More than 90% of the world’s population of Barrow’s Goldeneye (Bucephala islandica) breeds from central Alaska to northern California (Robert et al. 2000). The species also breeds in Iceland, where the population is estimated at approximately 2000 birds (Robert et al. 2000). There has also been a small population associated with eastern North America, however, historically, breeding records have been sparse and, in many cases, unconfirmed (Bellrose 1980). Robert et al.
JOURNAL OF WILDLIFE MANAGEMENT 72(6):1388–1393; 2008)
Breeding propensity, the proportion of sexually mature females that initiate egg production,
can be an important demographic trait when considering reproductive performance and,
subsequently, population dynamics in birds. We measured egg production using yolk
precursor (vitellogenin and very-low-density lipoprotein) analyses and we measured nesting using radiotelemetry to quantify breeding propensity of adult female harlequin ducks (Histrionicus
Large secondary-nesting birds such as ducks rely on appropriate cavities for breeding. The main objective of this study was to assess the availability of large cavities and the potential of a managed boreal coniferous landscape to provide nesting trees within the breeding area of the eastern population of Barrow’s Goldeneye (Bucephala islandica), a cavity-nesting species at risk in Canada.
The Alaska breeding population of Steller’s
Eider (Polysticta stelleri) was classified as
threatened under the Endangered Species Act in
June 1997 (USFWS 2002). Recent records suggest
that the species’ current breeding range in northern
Alaska has been greatly reduced and now is
restricted mostly to the vicinity of Barrow
(Quakenbush et al. 2002). Results of aerial surveys
in the past decade verify this distribution pattern
(e.g., Larned et al. 1999, Obritschkewitsch et al.
2008, Ritchie and King 2001).
Sixty seven Abstracts 45 posters presented 12-16 September 2011 in Seward Alaska