Product Type: Open-file Report
Author(s): Ransom, J., F.J. Singer, and L. Zeigenfuss
Ransom, J., F.J. Singer, and L. Zeigenfuss. 2005. Annual report for 2004 wild horse research and field activities: U.S. Geological Survey Open-File Report 2005-1316. 19 p.
This publication is available from the USGS Fort Collins Science Center .
The Bureau of Land Management (BLM) and U.S. Geological Survey-Biological Resources Discipline (USGS/BRD) continued wild horse research in 2004, investigating the strategic research elements of fertility control and population estimation. Fertility control research was focused on the individual-based porcine zonae pellucid (PZP) field trials at the Pryor Mountain Wild Horse Range (WHR), Little Rock Cliffs WHR, and McCullough Peaks Wild Horse Management Area (WHMA). Aerial population estimation research was conducted on a number of western wild horse herds to test different survey techniques as applied to various habitat types and population sizes.
Aerial population estimates of wild horses (Equus caballus) in the Adobe Town and Salt Wells Creek Herd Management Areas using an integrated simultaneous double-count and sightability bias correction technique