Dall's Sheep Monitoring in the Arctic Network National Parks
Delisle Z. Dall's Sheep Monitoring in the Arctic Network National Parks. 1974. National Park Service
The primary goal of the Arctic Network Dall’s sheep monitoring program is to determine trends in the abundance and distribution of sheep in the parks and preserves which span the central and western Brooks Range, while being statistically robust enough to deal with the difficulties of surveying in this remote area. Over 41,000 km2 of potential Dall’s sheep habitat have been delineated for this region, most of it within Gates of the Arctic National Park and Preserve (GAAR), Noatak National Preserve (NOAT), northern Kobuk Valley National Park (KOVA) and a small portion of Cape Krusenstern National Monument (CAKR). The region likely harbored 13-15% of the world’s Dall’s sheep population in the 1980s (Valdez and Krausman 1999), followed by a precipitous decline in the early 1990s attributed to severe winter weather that likely reduced access to forage and increased vulnerability to predation (Whitten 1997, Shults 2004). Localized surveys in small portions of the region have shown some recovery in numbers since then (e.g., Shults 2004), but little is known about park-wide and regional population trends.
- Type
- Project
- Authors
- Delisle, Zackary
- Publisher
- National Park Service
- Units
- ARCN , CAKR , GAAR , KOVA , NOAT
- Keywords
- Abundance, Alaska, dall, dall's, Denali, game, Gates of the Arctic, Kobuk, Monitoring, National Park, Noatak, Ovis dalli, Population, Sheep, Wildlife, wrangell st. elias
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Mammals
Program
Products
- Survey Summaries: Dall's Sheep Monitoring in Alaska's Arctic Network of Parks
- Demography of Dall’s Sheep in Northwestern Alaska
- 2021 Dall’s Sheep Survey Summary: Gates of the Arctic National Park and Preserve
- Dall's Sheep Resource Brief for the Arctic Network
- Using spatial distance sampling models to optimize survey effort and address violations of the design assumption
- Dall's Sheep 2020 Survey: Gates of the Arctic National Park and Preserve
- Protocol for monitoring Dall’s sheep: Arctic (ARCN) and Central Alaska (CAKN) Inventory and Monitoring Networks, version 1.0
- Standard Operating Procedure (SOP) 1: Preparations for the Field Season, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 2: Generating Transects, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 3: Field Computer Setup, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 4: GPS Setup, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 5: Training, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 6: Field Equipment Lists, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 7: Flying Transects, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 8: Data Collection, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 9: Data Downloading and Backup, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 10: Using GPS-Photo Link, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 11: Data QA/QC, Formatting and Archiving, Version 1.0, Dall's Sheep Monitoring Protocol
- Standard Operating Procedure (SOP) 12: Data Analysis, Version 1.0, Dall's Sheep Monitoring Protocol
- Monitoring Dall’s sheep in Alaska: ARCN and CAKN Inventory and Monitoring Networks, data quality standards
- 1974 Sheep Survey Units, Denali National Park and Preserve
- National Park Service Alaskan Dall Sheep Survey Units, Francis Singer, 1984
- The Status of Dall’s Sheep in The Arctic Network: Declining Populations
- Reducing effort while improving inference: Estimating Dall’s sheep abundance and composition in small areas
- Using distance sampling and hierarchical models to improve estimates of Dall's sheep abundance
- Dall’s sheep in Gates of the Arctic National Park and Preserve, Alaska: 2010 survey report
- FY11 NPS Dall’s sheep surveys – ARCN and CAKN park units
- 2008 aerial Dall’s sheep survey in the Itkillik Preserve, Gates of the Arctic National Park and Preserve, Alaska
- Arctic Network Dall's Sheep Monitoring Protocol Development Summary
- Dall’s sheep survey unit – comparisons (June, 2008): Dall's Sheep Survey Unit Area, Ruggedness and Elevation Comparison
- Abundance survey of Dall’s sheep in the western Baird Mountains, Alaska, July 2004
- demography and home ranges of Dall’s sheep in the central Brooks Range, Anaktuvik Pass, Alaska. Gates of the Arctic National Park and Preserve
- 1996 Dall Sheep (Ovis dalli dalli) Survey, Gates of the Arctic National Park and Preserve, Alaska
- Dall sheep survey, Gates of the Arctic National Park and Preserve, Alaska-1987
- Aerial Dall sheep count, 1982, 1983 and 1984 : Gates of the Arctic National Park and Preserve
- Some population characteristics of Dall Sheep in six Alaska national parks and preserves
- Aerial Dall sheep survey, June-August 1983
- Dall sheep numbers and distribution in the Noatak National Preserve, 1983
- Vegetation on Dall sheep range in the mountains of the western Noatak Valley
- Demography and Home Ranges of Dall’s Sheep in the Central Brooks Range, Anaktuvuk Pass, Alaska