Aquatic Research Section Leader
Colorado Parks and Wildlife
317 West Prospect Street
Fort Collins, CO 80526
Phone: (970) 472-4361
Fax: (970) 472-4457
Google Scholar Profile
Ph.D., Fishery and Wildlife Biology — Colorado State University, 1999
M.S., Fishery and Wildlife Biology — Colorado State University, 1995
B.S., Biology and Fishery Science — University of Alaska, 1992
Current or Recent Positions
Aquatic Research Chief — Colorado Parks and Wildlife, 2011-Present
Aquatic Research Scientist — Colorado Parks and Wildlife, 2001-2011
Post-Doctorate Fellow — Colorado State University, 1999-2000
Research Associate — Colorado Cooperative Fish and Wildlife Research Unit, 1993-1999
Current or Recent Research Projects
Directs statewide aquatic research activities involving all aspects of native and non-native aquatic wildlife. Supervises a staff of 14 research scientists, hatchery technicians, and support staff. Ongoing research studies include evaluations of various strains of whirling disease resistant rainbow trout for hatchery production re-establishment in the wild.
Areas of Interest/Expertise
My research interest areas include salmonid reproduction and strain selection, salmonid disease studies, the economic impacts of fisheries in Colorado, and angler creel and mail-in surveys.
R. B. Nehring, G. J. Schisler, L. Chiaramonte, A. Horton and B. Poole. 2016.
Accelerated deactivation of Myxobolus cerebralis myxospores by susceptible and non-susceptible Tubifex tubifex. Diseases of Aquatic Organisms 121(1):37-47.
Purdy, P., E.A. Barbosa, C. J. Praamsma, and G. J. Schisler. 2016.
Modification of trout sperm membranes associated with activation and cryopreservation. Implications for fertilizing potential. Cryobiology 2016, http://dx.doi.org/10.1016/j.cryobiol.2016.05.008
Nehring, R. B., G. Schisler, L. Chiaramonte, A. Horton, and B. Poole. 2015.
Assessment of the long-term viability of the myxospores of Myxobolus cerebralis as determined by production of the actinospores by Tubifex tubifex. Journal of Aquatic Animal Health. 27(1):50-56.
Fetherman, E. R., D. L. Winkelman, L. L. Bailey, G. J. Schisler, and K. Davies. 2015.
Brown trout removal effects on short-term survival and movement of Myxobolus cerebralis-resistant rainbow trout. Transactions of the American Fisheries Society 144:610-626.
Fetherman, E. R., D. L. Winkelman, M. R. Baerwald, and G. J. Schisler. 2014.
Survival and reproduction of Myxobolus cerebralis resistant rainbow trout in the Colorado River and increased survival of age-0 progeny. PLoS ONE9(5):e96954.
Fetherman, E.R., D. L. Winkelman,
G. J. Schisler,
and M. F. Antolin. 2012.
Genetic basis of differences in myxospore count between whirling disease-resistant and –susceptible strains of rainbow trout
. Diseases of Aquatic Organisms. 102: 97-106.
Baerwald, M. R., Petersen, J. L., Hedrick, R. P.,
Schisler, G. J., and B. May. 2011.
A major effect quantitative trait locus for whirling disease resistance identified in rainbow trout
Oncorhynchus mykiss. Heredity (2011) 106:920-926.
Fetherman, E. R., D. L. Winkelman,
G. J. Schisler, and C. A. Myrick. 2011.
The effects of
on the physiological performance of whirling disease resistant and susceptible strains of rainbow trout. Journal of Aquatic Animal Health 23:169-177.
Schisler, G. J., N. K. M. Vieira, and P. G. Walker. 2008.
Application of Household Disinfectants to Control New Zealand Mudsnails. North American Journal of Fisheries Management 28:1172–1176.
Schisler, G. J., K. A. Myklebust, and R. P. Hedrick. 2006.
Inheritance of Myxobolus cerebralis resistance among F1-generation crosses of whirling disease resistant and susceptible rainbow trout strains. Journal of Aquatic Animal Health 18:109– 115.
Schisler, G. J., and E. P. Bergersen. 2002.
Evaluation of risk of high elevation Colorado waters to the establishment of Myxobolus cerebralis. Pages 33-41
in J. L. Bartholomew and J. C. Wilson, editors. Whirling disease: reviews and current topics. American Fisheries Society, Symposium 29, Bethesda, Maryland.
Schisler, G. J., E. P. Bergersen, P. G. Walker, J. Wood, and J. K. Epp. 2001.
Comparison of single-round polymerase chain reaction (PCR) and pepsin-trypsin digest (PTD) methods for detection of Myxobolus cerebralis. Diseases of Aquatic Organisms 45:109-114.
Schisler, G. J. and E. P. Bergersen. 2000.
Effects of multiple stressors on morbidity and mortality of fingerling rainbow trout infected with Myxobolus cerebralis. Transactions of the American Fisheries Society 129:859-865.
Schisler, G. J., E. P. Bergersen, and P. G. Walker. 1999.
Evaluation of chronic gas supersaturation on growth, morbidity, and mortality of fingerling rainbow trout infected with Myxobolus cerebralis. North American Journal of Aquaculture 61:175- 183.
Schisler, G. J., P. G. Walker, L. A. Chittum, and E. P. Bergersen. 1999.
Gill ectoparasites of juvenile rainbow trout in the Upper Colorado River. Journal of Aquatic Animal Health 11:170-174.