Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Population trajectories and extinction probabilities for populations of large ungulates


September 2015 - December 2018


Understanding the importance of life history parameters is vital to managing wildlife populations. We will evaluate the minimum population size at which a populations are unlikely to go extinct and the population persistence times of various ungulate species across the Southwest in relation to variation in observed demographic rates. The intent is to generate population models using a suite of observed demographic parameters (and their variability), thereby assisting in management of multiple ungulate species across the southwestern United States.

Research Products and Activities

Peer Reviewed Publications

  • Gedir, J.V., J.W. Cain III, G. Harris, and T.T. Turnbull. 2015. Effects of climate change on long-term population growth of pronghorn in an arid environment. Ecosphere 6: art 189. Download  | 

Technical Publications

  • Gedir, J.V., and J.W. Cain III. 2017. Population trajectories and extinction probabilities for populations of large ungulates. Annual Report to the U.S. Fish and Wildlife Service.

Current Staff

Federal Staff: 95

Masters Students: 238

Phd Students: 144

Post Docs: 54

University Staff: 239

5 Year Summary

Students graduated: 673

Scientific Publications: 1905

Presentations: 4236



Funding Agencies

  • US Fish and Wildlife Service


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey