Charles J. Gagen, Ph.D.
Head – Department of Biological Sciences
Professor of Fisheries Science
1701 North Boulder Avenue
Russellville, AR 72801
- Ph.D., Ecology, Pennsylvania State University, 1991
- M.S., Ecology, Pennsylvania State University, 1986
- B.S., Wildlife Biology, University of Tennessee (Martin), 1983
- American Fisheries Society (AFS)
- Arkansas Chapter AFS
- American Society of Ichthyologist and Herpetologists
- Positions in Professional Organizations
- Local Arrangements Committee Co-Chair for the 2013 American Fisheries Society Annual
- Past President - Arkansas Chapter of the American Fisheries Society
- Past Treasurer - Arkansas Chapter of the American Fisheries Society
- Past Chair - Arkansas River Conservation Committee
- The ecology of non-game stream fish, especially movement and mortality responses to
physical and chemical conditions.
Studies related to fish passage at road crossings
- Ryles, J. 2012. The Effects of Consecutive Road Crossings on Fish Movement and Community
Structure in a Ouachita Mountain Stream. Master's Thesis. Arkansas Tech University,
Russellville, AR. 53 pp.
- Standage, R.W. and C.J. Gagen. 2007. A review of the influences of road crossings
on warmwater fishes in Ouachita Mountain streams, Ouachita National Forest. Proceedings
of the 2007 International Conference on Ecology and Transportation. See pages 180-186
- Rajput, S. 2003. The Effects of Low-water Bridges on Movement, Community Structure,
and Abundance of Fishes in Streams of the Ouachita Mountains. Master's Thesis, Arkansas
Tech University, Russellville, AR. 94 pp.
Studies related to fish response to seasonal stream drying
- Hafs, A.W., C.J. Gagen, and J.K. Whalen. 2010. Smallmouth bass summer habitat use,
movement and survival in response to low flow in the Illinois Bayou, Arkansas. North
American Journal of Fisheries Management. 30:604-612.
- Homan, J.M., N.M. Girondo, and C.J. Gagen. 2005. Quantification and prediction of
stream dryness in the Interior Highlands. Journal of the Arkansas Academy of Sciences.
- Gagen, C.J., R.W. Standage, and J.N. Stoeckel. 1998. Ouachita madtom (Noturus lachneri)
metapopulation dynamics in intermittent Ouachita Mountain streams. Copeia 1998: 874-882.
Other studies related to fish
- Stoeckel, J. N., C. J. Gagen, and R. W. Standage. 2011. Feeding and reproductive biology
of the Ouachita madtom. Pages 267-279 in P. H. Michaletz and V. H. Travnichek, editors.
Catfish 2010: Conservation, ecology, and management of catfish: the second international
symposium. American Fisheries Society Symposium 77, Bethesda Maryland.
- Gagen, C.J., K.R. Moles, L.J. Hlass, and R.W. Standage. 2002. Habitat and abundance
of the Ouachita darter (Percina sp. nov.). Journal of the Arkansas Academy of Sciences
- Baker, J.P., J.V. Sickle, C.J. Gagen et al. 1996. Episodic acidification of small
streams in the northeast United States: Effects on fish populations. Ecological Applications
- Gagen, C.J., W.E. Sharpe, and R.F. Carline. 1994. Downstream movement and mortality
of brook trout (Salvelinus fontinalis) exposed to acidic episodes in streams. Canadian
Journal of Fisheries and Aquatic Sciences 51:1620-1628.
- Carline, R.F., C.J. Gagen, and W.E. Sharpe. 1994. Brook trout population dynamics
and mottled sculpin occurrence in relation to acidic episodes in streams. Ecology
of Freshwater Fish 3:107-115.
- Gagen, C.J., R.F. Carline, and W.E. Sharpe. 1993. Mortality of brook trout, mottled
sculpins, and slimy sculpins during acidic runoff episodes. Transactions of the American
Fisheries Society 122:616-628.