Cape Krusenstern National Monument Muskox Survey - July 1997

Shults, Brad; Wilson, Kahlil

Muskoxen were transplanted to Cape Thompson from Nunivak Island in 1970 (36 animals) and 1977 (34 animals). Since these transplants, population growth in the coastal area from Cape Krusenstern to Cape Lisburne has been slow. The Alaska Department of Fish and Game (ADF&G) has conducted counts of muskoxen in this area since the transplants. Most information is available in Annual Muskox Survey and Inventory Reports distributed by the ADF&G. This survey was conducted by The National Park Service (NPS) as part of the ongoing inventory of muskoxen that specifically occupy the Cape Krusenstern National Monument (CAKR) and adjacent lands where muskoxen have been observed. METHODS We surveyed CAKR using the existing Alaska Dept. of Fish and Game Universal Coding Units (UCU’s) as survey units. The boundaries of UCU’s are defined by contours and major drainages. We surveyed UCU’s 83, 96, 111, 131, and 128 using a single PA-18 Super Cub with a pilot/observer team (NPS). Transects were flown within each UCU utilizing natural land formations as reference points. In the mountainous areas, we systematically searched using geographic features such as ridge lines and drainages. All surveys were flown at an altitude of 500-1,000 ft above ground level. When muskoxen were sighted, we initially approached them at an altitude of 1,000-1,200 ft., then slowly decreased our altitude as we completed accurate counts. This method enabled us to differentiate individual muskox and calves in the group without the group forming a defensive ring. RESULTS We conducted the survey between 15 July and 17 July 1997 ( Table 1). Weather conditions during the survey were optimal with clear skies and light wind. The survey required 10.5 flight hours with each UCU requiring approximately 2 hours to complete. We classified 46 animals (36 adults; 10 calves) in six groups.

Cape Krusenstern National Monument Muskox Survey - July 1997

See also