SKIP navigation
Site Name Here
Bird's eye view of platte river

Relevant links:

  Who I Am

photo of Dr. Kolok

> View my UNMC page

> View my CV




Alan Kolok, Ph.D.
Director, Aquatic Toxicology Laboratory
Professor, Biology
University of Nebraska at Omaha
Professor, Dept of Environmental, Agricultural & Occupational Health
University Nebraska Medical Center

422 Allwine Hall
6001 Dodge Street
Omaha, NE 68182-0040
ph. 402 554 3545
(FAX) 402 554 3532

Research Interests
I am a physiological ecologist and an aquatic toxicologist. My principle research focuses on fishes living in contaminated environments. Much of my research focuses on agrichemical contaminants, and fish living in Nebraska. The Elkhorn River watershed is of particular interest to me.

The use of fish as environmental sentinel organisms interests me, as aquatic organisms can tell us a lot about water quality. I like mechanism, how things work, and that's the approach we take toward scientific inquiry. I am always looking for student help in my lab, on an undergraduate, M.S. and Ph.D. level, so if these projects appeal to you, contact me!


1985-1991 University of Colorado, Bouldera: Environmental, Population and Organismic Biology.
1979-1982 University of Washington, Seattle: Fisheries and Oceanic Sciences.
1974-1978 Miami University, Oxford, Ohio: Zoology

Water Current
I'm a regular contributer to Water Current, the quarterly publication of the Univeristy of Nebraska-Lincoln Water Center. The titles of these articles are listed below, and you can read these and more Kolok Water Current articles here.

"Environmental Science Education: Motive and Opportunity, but Maybe Not the Means?" WaterCurrent, Summer 2010 Vol. 4, No. 3

"Frogs and Atrazine: What Doesn't Kill You Can Turn You Female." Water Current, Spring 2010 Vol. 4, No. 2

"Sediments and Emerging Contaminants: On the Menu and in the Air." Water Current, Winter 2010 Vol. 42, No. 1

"Emerging Contaminants in a Flat World." Water Current, Fall 2009 Vol. 41, No. 4


Kolok, A.S. and H.L. Schoenfuss. In press. Environmental scientists, biologically active compounds and sustainability: The vital role for small-scale science. Environmental Science and Technology.

Sellin, M.K., D.D. Snow and A.S. Kolok. 2010. Reductions in hepatic vitellogenin and estrogen receptor alpha expression by sediments from an agriculturally-impacted waterway. Aquatic Toxicology 96:103-108.

Sellin, M.K., D.D. Snow, M. Schwarz, B.J. Carter and A.S. Kolok. 2009. Agrichemicals in Nebraska USA watersheds: Occurrence and endocrine effects. Environmental Toxicology and Chemistry 28:2443-2448.

Sellin, M.K., D.D. Snow, S. T. Gustafson, G.E. Erikson and A.S. Kolok. 2009. The endocrine activity of beef cattle wastes: Do growth-promoting steroids make a difference? Aquatic Toxicology 92:221- 227.

Kolok, A.S., C. Beseler, X-H. Chen and P.J. Shea. 2009. The watershed as a functional unit in environmental health: Emerging contaminants inthe Elkhorn River watershed. Environmental Health Insights. In the Press.

Sellin, M.K. D.D. Snow, S.T. Gustafson, G.E. Erikson & A.S. Kolok. 2009. The endocrine activity of beef cattle wastes: Do growth-promoting steroids make a difference? Aquatic Toxicology. In the Press.

Sellin, M.K., D.D. Snow, D.L. Akerly & A.S., Kolok. 2009. Estrogenic compounds downstream from three small cities in eastern Nebraska: Occurrence and biological effect. Journal of the American Water Resources Association, 45:1-8.

Kolok, A.S. & M.K. Sellin. 2008. The environmental impact of growth promoters employed by the United States beef cattle industry: History, knowledge and future directions. Reviews of Environmental Contamination and Toxicology. 195:1-30.

Click here for the complete list of publications from 2005-2009
placeholder placeholder placeholder placeholder placeholder