Resources related to Distribution

Found Transmitter A Needle in a Haystack

At first glance the radio transmitter looked like a firecracker with a long fuse. It was a lucky fluke, not a firecracker – that transmitter lying on the Mendenhall Wetlands near Juneau had been implanted in a sea duck ten years earlier and 900 miles south.
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Scoters nests are scattered over a vast area from eastern Interior Alaska across northern Canada, and for this reason, scoter nesting habits have been poorly understood and historically difficult to research. Implanted radio transmitters for ducks have contributed valuable insights in recent years.

Wintering Snowy Owls feed on Sea Ducks in the Belcher Islands, Nunavut, Canada

j. Raptor Res. 37(2):164-166¸ 2003 The Raptor Research Foundation, Inc.
Short Communications
While studying the ecology of sea ducks wintering around the Belcher Islands, we
also recorded Snowy Owls (Gilchrist and Robertson 2000). Herein, we expand on
our observations of Snowy Owls, describing their distribution and their relationship
w•th wintering Common Eiders (Somateria mollissima) and Long-tailed Ducks (Clangula hyemalis).

Atlantic and Great Lakes Sea Duck Migration Study

This study is a large scale, multi-year, collaborative project that will use satellite telemetry to document annual migration patterns and habitat use. Driven by a lack of knowledge on sea duck distribution, migration patterns, and seasonal habitats used, the Sea Duck Joint Venture (SDJV) partnership has launched a large-scale satellite telemetry study of sea ducks in the Atlantic Flyway. From 2009 to 2013, about 300 transmitters will be deployed in four species: Black Scoter, Surf Scoter, White-winged Scoter, and Long-tailed Duck - all species of high conservation concern.

Diving Duck Distribution, Abundance, and Food Habits in Chesapeake Bay

Diving ducks wintering in Chesapeake Bay during the last 50 years have accounted for 23% of Atlantic Flyway and 9% of North American populations based on aerial surveys. Continental and local factors have affected these population changes. Loss of submerged aquatic vegetation (SAV) due to degradation of water quality, has been a contributing factor, although, many other factors related to human population increases have been implicated in the changes in the distribution and abundance of diving ducks.

Techniques for Determining the Availability of Food Items to Seaducks Wintering on the Chesapeake Bay, Maryland

Introduction: Historically, the Chesapeake Bay has been a major wintering area for seaducks. Based on aerial surveys, three species of seaducks, surf scoters (Melanitta perspicillata), black scoters (Melanitta nigra), and long-tailed ducks (Clangula hyemalis), have shown major declines in recent years. One possible explanation for this decline is a reduction of available food items.Data indicates that surf and black scoters likely feed at depths ranging from 10 to 30 feet in the mesohaline region of the Chesapeake Bay.

Food Habits of Sea Ducks in the Atlantic Maritimes and Chesapeake Bay

Numbers of scoters (black, surf, and white-winged) and long-tailed ducks wintering in the Maritime provinces of Canada and the Chesapeake Bay (MD and VA, USA) have noticeably declined in recent years. Common goldeneye populations have also declined, but bufflehead populations have increased in numbers.

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