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Dave Jirsa MA

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Research Scientist

Nutrition

Dave Jirsa grew up in Austin, TX, and attended the University of Texas at Austin for both a B.A. in Biology and an M.A. in Marine Science.  His thesis project was a study of what are called “low pollution” feeds.  The idea was to design feeds that are efficiently utilized by the fish and result in fewer waste products, primarily nitrogen.  Dave designed completely closed systems, raised red drum (Sciaenops ocellatus), and measured differences in growth, survival, nitrogen excretion, etc.  The work is similar to what he is currently doing at Hubbs-SeaWorld Research Institute, where he is trying to determine if dietary differences affect survival, growth, health, blood and tissue biochemistry – work that is critical in determining how diets are really affecting captive-bred fish.

Current Research

Minimizing the use of fish meal and fish oil in the diets of white seabass and California yellowtail

Development of soy-based feeds for white seabass and California yellowtail

Recycling trimmings produced as a byproduct of commercial fish processing into fish meal for aquafeeds

Selected Publications

Jirsa, D.O., D.A. Davis, and M.A. Drawbridge. In press. Development of a practical soy-based diet for white seabass, Atractoscion nobilis. North American Journal of Aquaculture.


Jirsa, D.O., M. Drawbridge, and K. Stuart. 2009. The effects of tank color and light intensity on growth, survival and stress tolerance of white seabass, Atractoscion nobilis, larvae. Journal of the World Aquaculture Society 40:702-709.


Jirsa, D., M. Drawbridge, and K. Stuart. 2007. Spawning of a captive population of California sheephead, Semicossyphus pulcher. Journal of the World Aquaculture Society 38:122-128.


Jirsa, D.O., D.A. Davis, and C.R. Arnold. 1997. Effects of dietary nutrient density on water quality and growth of Red Drum, Sciaenops ocellatus, in closed systems. Journal of the World Aquaculture Society 28:68-78.


Davis, D.A., D.O. Jirsa, and C.R. Arnold. 1995. Evaluation of soybean proteins as replacements for menhaden fish meal in practical diets for red drum, Sciaenops ocellatus. Journal of the World

 

Dave Jirsa


Major Research Areas
Nutrition

Education
M.A., Marine Science, University of Texas at Austin

B.A., Biology, University of Texas at Austin