Cooperative Fish and Wildlife Research Units Program:
Education, Research and Technical Assistance for Managing Our Natural Resources

Staff Member

Robert Al-Chokhachy

PhD

Research Publications Publication Date
Budy, P., T. Bowerman, R. Al-Chokhachy, M.M. Conner, and H. Schaller. 2017. Quantifying long-term population trends of threatened bull trout: challenges, lessons learned, and opportunities. Accepted with minor revisions 17 November, 2016. Canadian Journal of Fisheries and Aquatic Sciences. USGS IP-066765. January 2017
Bennet, S., B. Roper, R. Al-Chokhachy, and P. Budy. 2014. Annual Variation of Spawning Cutthroat Trout in a Small Western USA Stream: A Case Study with Implications for the Conservation of Potamodromous Trout Life History Diversity. North American Journal of Fisheries Management 34:1033-1046. USGS FSP:IP-050825. | Abstract January 2014
Al-Chokhachy, R., and P. Budy. 2007. Summer microhabitat use of fluvial bull trout in Eastern Oregon streams. North American Journal of Fisheries Management 27:1068-1081. August 2007
Al-Chokhachy, R., P. Budy, and M. Conner. 2009. Detecting declines in the abundance of a bull trout (Salvelinus confluentus) population: understanding the accuracy, precision, and costs of our efforts. Canadian Journal of Fisheries and Aquatic Sciences 66: 649–658. April 2009
Al-Chokhachy, R., Budy, P., and H. Schaller. 2005. A comparison of redd counts and mark/resight methods for estimating abundance and monitoring bull trout population trends. North American Journal of Fisheries Management 25:1505-1512. April 2005
Al-Chokhachy, R., B.B. Roper, T. Bowerman, and P. Budy. 2010. A review of bull trout habitat associations and exploratory analyses of patterns across the Interior Columbia River Basin. North American Journal of Fisheries Management 30:464-480. March 2010
Al-Chokhachy, R. and P. Budy. 2008. Demographic characteristics, population structure, and vital rates of a fluvial population of bull trout in Oregon. Transactions of the American Fisheries Society 137:262-277. December 2008
Project Completion Date
Long-Term Logan River Trout Viability Study and Monitoring September 2021
Life-history evaluation of Yellowstone cutthroat trout in Spread Creek, Wyoming, with specific linkages to regional climate change and invasive species June 2014
LTER: The Role of Biogeochemical and Community Openness in Governing Arctic Ecosystem Response to Climate Change and Disturbance April 2021
Evaluating sediment and nutrient contributions from unpaved forest roads to headwater streams September 2019
Statistical analyses to direct conservation and restoration priorities for the yellowstone cutthroat trout in the context of climate change August 2017
Presentations Presentation Date
Voss, N., R. Al-Chokhachy, A. Zale, A. Sepulveda, M. Ruggles, and J. Rhoten. 2018. Patterns and limits of smallmouth bass distribution in the upper Yellowstone River. Annual Meeting of the Montana Chapter of the American Fisheries Society, Butte, Montana, 29 January to 2 February 2018. February 2018
Uthe, P., R. Al-Chokhachy, and A. Zale. 2013. Effects of abiotic and biotic factors on life history characteristics and vital rates of Yellowstone cutthroat trout in a headwater basin. 46th Annual Meeting of the Montana Chapter of the American Fisheries Society. Fairmont, Montana, 5-8 February, 2013. February 2013
Shepard, B. B., R. Al-Chokhachy, S. Opitz, C. Sestrich, and A. V. Zale. 2013. Potential influences of climate change on population dynamics of nonnative brook trout and native Yellowstone cutthroat trout in headwater stream networks. Annual Meeting of the Western Division of the American Fisheries Society. Boise, Idaho, 15-18 April, 2013. April 2013
Shepard, B. B., R. Al-Chokhachy, S. Opitz, C. Sestrich, and A. V. Zale. 2013. Distributions, recruitment, growth, and movements of nonnative brook trout and native Yellowstone cutthroat trout in the upper Shields River basin. 46th Annual Meeting of the Montana Chapter of the American Fisheries Society. Fairmont, Montana, 5-8 February, 2013. February 2013
Lance, M., A. Zale, J. Mullen, R. Al-Chokhachy, G. Grisak and T. McMahon. 2017. Fish movement patterns in the Smith River watershed in central Montana. Wild Trout XII, West Yellowstone, Montana, 26-29 September 2017. September 2017
Lance, M., A. Zale, J. Mullen, R. Al-Chokhachy, G. Grisak and T. McMahon. 2017. Fish movement patterns in the Smith River watershed in central Montana. Annual Meeting of the Western Division of the American Fisheries Society, Missoula, Montana, 22-25 May 2017. May 2017
Bowerman, T., P. Budy, R. Al-Chokhachy, and H. Schaller. 2010. Patterns of bull trout movement and life history expression: What can we learn from multiple years and multiple sites using passive PIT-tag antennas? Presentation, American Fisheries Society, Western Division Annual Meeting, Salt Lake City, Utah. April 2010
Al-Chokhachy, R., P. Uthe, B. Shepard, and A. V. Zale. 2015. Temperature and streamflow effects on growth and survival of headwater cutthroat trout populations in the Greater Yellowstone Area. 145th Annual Meeting of the American Fisheries Society. Portland, Oregon, 16-20 August, 2015. August 2015
Technical Publications Publication Date
Budy, P., R. Al-Chokhachy, and G.P. Thiede. 2007. Bull trout population assessment in northeastern Oregon: a template for recovery planning. 2006 Annual Progress Report to the US Fish and Wildlife Service. UTCFWRU 2007(1):1-83. April 2007
Budy, P., R. Al-Chokhachy, and G.P. Thiede. 2004. Bull trout population assessment and life-history characteristics in association with habitat quality and land use in the Walla Walla River Basin: a template for recovery planning. 2003 Annual Progress Report to US Fish and Wildlife Service. 70 pages. May 2005
Budy, P., R. Al-Chokhachy, and G.P. Thiede. 2003. Bull trout population assessment and life-history characteristics in association with habitat quality and land use in the Walla Wall River Basin: a template for recovery planning. 2002 Annual Progress Report to US Fish and Wildlife Service. 41 pages. May 2003
Budy, P., R. Al-Chokhachy, K. Homel, and G.P. Thiede. 2006. Bull trout population assessment and life-history characteristics in association with habitat quality and land use in the Walla Walla River Basin: a template for recovery planning. 2005 Annual Progress Report to US Fish and Wildlife Service. May 2006