Estimation of Moose Abundance using the Geospatial Population Estimator combined with a Sightability Model on Togiak National Wildlife Refuge Progress Report.docx
type: Distribution
access URL: https://ecos.fws.gov/ServCat/DownloadFile/129007
media type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
description: Progress report on disposition of $25,000 I&M award - Two aviation contracts in place for work to be performed in October 2017.
format: DOC
issued: 2018-06-09T00:15:40.768971
modified: 2025-12-01T15:19:22.656090

Estimation of Moose Abundance using the Geospatial Population Estimator combined with a Sightability Model on Togiak National Wildlife Refuge products
type: Dataset
contact point: Organization
  fn: Brent Frakes
keyword: geoss
keyword: geo
keyword: united-states
keyword: north-america
keyword: ckan
keyword: amerigeoss
keyword: amerigeo
keyword: national
description: Moose (Alces alces gigas) have recently expanded their range into the boundaries of Togiak National Wildlife Refuge and BLM Goodnews Block (TGK; Aderman et al. 2011). Fewer than 30 moose were recorded in Game Management Unit (GMU) 17A from 1980-1990, however, 84 moose were recorded in 1994 and the total count of moose has since increased to a total of 1,166 individuals counted in 2011 (Aderman et al. 2011). Continued monitoring of moose is essential for developing regulatory proposals and recommendations to the Federal Subsistence Board/Alaska Board of Game (Aderman et al. 2011). Additionally, monitoring moose abundance on Togiak is important to fulfil two of the purposes for which Togiak Refuge was created; restoring large mammal populations and providing opportunities for continued subsistence uses by local residents (Aderman et al 2011). The abundance of moose has been monitored on TGK from 1995-2011 using a census, or complete count, and Gasaway style sample units (SU; Gasaway et al. 1986), which varied in size because they were delineated by topographic features (Fig. 1). Total counts, or censuses, are based on the assumption that all individuals are counted. Although this assumption is unlikely to be met when wildlife populations are surveyed from aircraft, the TGK moose census were assumed to have consistent bias through time, because moose are highly visible in open habitats when snow conditions are adequate. However, few moose surveys were conducted during the 4-year period from 2012-2015, primarily because lack of snow made it difficult to detect moose. Poor snow conditions are known to lower the sightability (the percentage of moose seen in the study area), yet, for most regions of Alaska, the variation in moose sightability during suboptimal conditions has not yet been quantified. Because climate change is affecting snow cover (Park et al. 2012), and it is unclear when there will be adequate snowfall to conduct moose surveys with consistently high sighta…
issued: 2025-12-01T15:19:22.662414
modified: 2025-12-01T15:19:22.662418

US Migrating
type: Agent