Annual report on vital signs monitoring of moose (Alces alces) distribution and abundance in Yukon-Charley Rivers National Preserve, Central Alaska Network: November 2009 survey report
Burch J. 2010. Annual report on vital signs monitoring of moose (Alces alces) distribution and abundance in Yukon-Charley Rivers National Preserve, Central Alaska Network: November 2009 survey report. Natural Resource Technical Report. NPS/CAKN/NRTR—2010/331. Natural Resource Program Center. Fort Collins, Colorado
This report describes the results of a moose survey along the Yukon River between Eagle and Circle Alaska. The aerial survey was conducted in November 2009. A population estimate of 1331 moose (+/- 251) was calculated. Executive Summary • Survey dates: November 17-21, 2009 (4.5 days of survey, 0.5 weather days) • Total survey area: 3,096 mi2 (8,019 km2), 555 survey units • Area surveyed: 618 mi2 (1601 km2), 111 survey units • Total moose observed: 308 (164 cows, 42 calves [4 set of twins], 102 bulls [21 spike-fork bulls]) • Applied sightability correction factor = 1.2 (ADF&G radiotelemetry studies, GMU 20A, 2007)• Average search effort: 6.72 minutes/mi2 (2.59 minutes/km2) • *Population estimate: 1331 moose +/- 251 (1080 – 1582) (+/-18.88% at 90% CI) (717 cows, 189 calves, 425 bulls [86 spike-fork (yrl) bulls]) • *Estimated density: 0.429 moose/mi2 (0.166 moose/km2) • *Estimated age/sex ratios: 26 calves:100 cows, 27 yearlings:100 cows, 59 bulls:100 cows • Average harvest: 26 bulls per year (20 year average, preserve wide)* 1.2 sightability correction factor applied
- Type
- Published Report
- Authors
- Burch, John
- Date of Issue
- 2010-05
- Publisher
- Natural Resource Program Center
- Units
- NRSS , YUCH
- Keywords
- Aerial moose survey, Alces alces, GeoSpatial population estimation, Moose, Population Dynamics, Yukon-Charley Rivers National Preserve