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An estimate of abundance and an assessment of the efficacy of sterilization techniques for the control of wild burro populations


February 2015 - March 2018


Feral burro populations have increased in numbers and are impacting fragile desert plant communities, reducing forage availability for domestic livestock and wildlife (Bastian et al. 1999) as well as seeking forage and water near human habitations, which brings them into conflict with humans. Fort Irwin, California has a relatively large population of burros
(~1,000) that enter into the cantonment area, resulting in human-wildlife conflicts. We propose to estimate the size of the burro population, examine patterns of space use and employ non-lethal methods of immunocontraception or sterilization to reduce recruitment into the existing population in an attempt to reduce population size.


Current Staff

Federal Staff: 2

Masters Students: 15

Phd Students: 5

Post Docs: 2

University Staff: 3

5 Year Summary

Students graduated: 23

Scientific Publications: 51

Presentations: 151



  • James CainCo-Principal Investigator
  • Gary W. RoemerPrincipal Investigator
  • David DelaneyNon-PI Collaborator
  • Talesha KarishStudent

Funding Agencies

  • Department of Defense, Fort Irwin


New Mexico Cooperative Fish and Wildlife Research Unit Cooperators

  1. New Mexico Department of Game and Fish
  2. New Mexico State University
  3. U.S. Fish and Wildlife Service
  4. U.S. Geological Survey