Teaching interests center around fish ecology, aquaculture, and environmental sciences. Current teaching includes a senior course on fish ecology and an introductory course on environmental sciences. Major research interest has focused on the ecology of natural fishes, particularly pike and muskellunge.  In addition, research interests include a focus on aquaculture, its role in feeding the world, especially poorer people in developing countries, and its impact on the environment.

Additional Research Interests:

• Worked extensively on behavior and ecology of many temperate fishes, including muskellunge, brown trout, lake sturgeon, yellow perch, largemouth bass, and alewives.
• Involved since 1983 in studies of extensive aquaculture systems in southeast Asia, particularly Thailand.
• Another focus has been the conservation of natural resources, either through work on endangered species such as the Paiute trout and lake sturgeon, or through the understanding of ecologically sensitive aquaculture practice.

Current/Recent Research:
Currently conducting work funded by the Agency for International Development on Aquaculture in Asia. Additional projects include work on muskellunge spawning, funded by the Wisconsin DNR: on recirculating aquaculture systems, funded by the Graham Environmental Sustainability Institute; and on environmental effects of shrimp farming in Belize.

Awards and Grants:

• Graham Environmental Sustainability Institute. 2006-present. Development of sustainable shrimp aquaculture.
• Oregon State University. 2006-present. Improving sustainability and reducing environmental impacts of aquaculture systems in China, and South and Southeast Asia.
• Oregon State University. 1983-present. Collaborative research support program for pond culture systems in Thailand.

Selected Publications:

• Diana, J.S. 1997. Feeding strategies. Pages 245-263 in H. Egna and C. Boyd, editors. Dynamics of pond aquaculture. CRC Press, Boca Raton, Florida.
• Diana, J.S. 2005 Biology and ecology of fishes, Second Edition. Biological Sciences Press. Carmel, Indiana.
• Diana, J.S. 1996. Energetics. Pages 103-124 in J. Craig, editor. Pike: Biology and exploitation. Chapman and Hall, London.
• Diana, J.S., J.P. Hudson, and R.D. Clark, Jr. 2004. Seasonal and daily movements of large brown trout in a Michigan stream. Transactions of the American Fisheries Society 133:34-44.
• Diana, J.S. 1983. An energy budget for northern pike. Can. J. Zool. 61: 1968-1975.