2009 Aerial Dall sheep survey, Yukon-Charley Rivers National Preserve, Alaska: July 2009 survey report
Burch J. 2010. 2009 Aerial Dall sheep survey, Yukon-Charley Rivers National Preserve, Alaska: July 2009 survey report. Natural Resource Technical Report. NPS/CAKN/NRTR—2010/367. Natural Resource Program Center. Fort Collins, Colorado
Report summarizes the results from a National Park Service aerial Dall sheep survey in July of 2009 inYukon-Charley Rivers National Preserve, Alaska. Executive Summary• Dates of the survey: July 2 - 4, 2009• 7 survey units (mountains) were flown in the Charley River Hills• 333 sheep were counted; 151 ewes, 72 lambs, 43 yearlings, 67 rams• 366 sheep estimated with sightability correction factor of 1.1 applied• Composition: 48 lambs, 29 yearlings, 44 rams per 100 ewes• 12 out of 67 rams (18%) were legal (full curl or better) • 12.48 hours of survey flight time in one R44 helicopter
- Type
- Published Report
- Authors
- Burch, John
- Date of Issue
- 2010-08
- Publisher
- Natural Resource Program Center
- Units
- NRSS , YUCH
- Keywords
- Aerial Survey, Alaska., Dall Sheep, Ovis dalli, Population Estimate, Yukon-Charley Rivers National Preserve