Grant support for the study of respiratory disease in wild sheep populations in the Mojave desert has yielded a wealth of information.
This report summarizes research conducted in the Mojave Desert, California, following the 2013 pneumonia outbreak and subsequent die-off of bighorn sheep (Ovis canadensis nelsoni) at Old Dad Peak (Kelso Mountains). Since the outbreak, pneumonic bighorn have been observed throughout the Mojave Desert system in California, and Mycoplasma ovipneumoniae (M. ovi) has been documented in all infected populations. Our research evaluated adult female survival, lamb survival, and bighorn movement in connection with the epizootic. The results presented herein are derived from data collected from November 2013 to December 2018; our analyses have not been finalized for all aspects of the study, and some results are preliminary as indicated.
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