Cooperative Research Units
Education, Research And Technical Assistance For Managing Our Natural Resources
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Effects of thermal tolerance limits on the distribution of southwest native fishes

Matt Zeigler (Graduate Student) deploying temperature datalogger.


November 2008 - August 2011


This is a joint research project with the Arizona Cooperative Fish and Wildlife Research Unit (Dr. Scott Bonar). The reserach is underway in Dr. Bonar’s thermal testing facility at the University of Arizona. Funding was obtained from the U.S. Fish and Wildlife Service Southwest Region for Climate Change to conduct a thorough review of historical and current thermal data for two important watersheds in New Mexico, Comanche Creek and the Pecos River. Further funding was obtained from T&E, Inc to purchase additional dataloggers.

Research Products and Activities

Technical Publications

  • Zeigler, M.P. and C.A. Caldwell. 2010. Evidence of climate change within the current range of Rio Grande cutthroat trout (Oncorhynchus clarki virginalis): Comanche and upper Pecos River watersheds of New Mexico. Final Report to U.S. Fish and Wildlife Service. 38 pp.


  • Zeigler, M. and C.A. Caldwell. 2009. Recent climate change within the Pecos and Costilla Creek basins. Rio Grande Cutthroat Trout Work Group Meeting, Santa Fe, NM. 12 November.
  • Zeigler, M. and C.A. Caldwell. 2009. Assessment of the vulnerability of high-value Rio Grande cutthroat trout populations to climate variables. Rio Grande Cutthroat Trout Range-wide Meeting, 8 December. Taos, NM.

Current Staff

Federal Staff: 101

Masters Students: 239

Phd Students: 154

Post Docs: 55

University Staff: 241

5 Year Summary

Students graduated: 657

Scientific Publications: 1778

Presentations: 4124



Funding Agencies

  • Region II Climate Change Program
  • Science Support Partnership
  • T&E, Inc.


Cooperative Research Units Program Headquarters Cooperators

  1. U.S. Geological Survey