Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (533 KB bytes)

Title: Conservation assessment for the dusky Canada goose (Branta canadensis occidentalis Baird).

Author: Bromley, Robert G.; Rothe, Thomas C.;

Date: 2003

Source: Gen. Tech. Rep. PNW-GTR-591. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 79 p

Publication Series: General Technical Report (GTR)

Description: Dusky Canada geese compose one of the smallest populations of geese in North America and have exhibited a marked decline in the past 30 years. A comprehensive synthesis of past and current biological information on the subspecies has been compiled to provide insights into the ecology and demography of the population, as well as explore management efforts to promote long-term conservation. Duskys occupy a discrete range, which has allowed the development of focused, long-standing management programs. The 1964 Alaska earthquake set in motion significant ecological changes in wetlands, plant communities, and the suite of predators on the dusky goose breeding grounds. A subsequent decline in goose productivity has become the primary challenge to this population. Concurrently, habitats on the western Washington and Oregon wintering grounds became more favorable for geese, but over 250,000 Canada geese of five other subspecies now occupy the region where formerly duskys were the majority. In the 1960s, the harvest of dusky geese was recognized as a primary management concern and regulation was effectively implemented. At present, protection of diminished duskys amid 10 times as many other Canada geese has created great complications for both management of hunting and attention to increasing complaints of crop depredation by wintering flocks. Important information needs are suggested to improve population monitoring, evaluate specific causes of lost productivity, and assess the direction and effects of succession of breeding ground habitats and conversion of winter habitats.

Keywords: Dusky Canada goose, Branta canadensis occidentalis, Alaska, Copper River Delta, nest predation, Willamette Valley

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Bromley, Robert G.; Rothe, Thomas C. 2003. Conservation assessment for the dusky Canada goose (Branta canadensis occidentalis Baird). Gen. Tech. Rep. PNW-GTR-591. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 79 p

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.