2 Works

Modeling management strategies for chronic disease in wildlife: predictions for the control of respiratory disease in bighorn sheep

Kezia Manlove, Emily Almberg, E. Frances Cassirer, Jennifer Ramsey, Keri Carson, Justin Gude & Raina Plowright
1. Controlling persistent infectious disease in wildlife populations is an on-going challenge for wildlife managers and conservationists worldwide. 2. Here, we develop a dynamic pathogen transmission model capturing key features of M. ovipneumoniae infection, a major cause of population declines in North American bighorn sheep (Ovis canadensis). We explore the effects of model assumptions and parameter values on disease dynamics, including density versus frequency dependent transmission, the inclusion of a carrier class versus a longer...

Natural history of a bighorn sheep pneumonia epizootic

Thomas Besser, E. Frances Cassirer, Amy Lisk, Danielle Nelson, Kezia Manlove, Paul Cross & John Hogg
A respiratory disease epizootic at the National Bison Range (NBR) in Montana in 2016-2017 caused an 85% decline in the bighorn sheep population, documented by observations of its unmarked but individually identifiable members, the subjects of an ongoing long-term study. The index case was likely one of a small group of young bighorn sheep on a short-term exploratory foray in early summer of 2016. Disease subsequently spread through the population, with peak mortality in September...

Registration Year

  • 2022
    2

Resource Types

  • Dataset
    2

Affiliations

  • Utah State University
    2
  • Idaho Department of Fish and Game
    2
  • Montana State University
    1
  • United States Geological Survey
    1
  • Montana Fish, Wildlife & Parks
    1
  • United States Fish and Wildlife Service
    1
  • Washington State University
    1