Ocean fisheries could benefit from research at South Dakota State University that will use new, high-protein co-products from ethanol production to partially replace fish meal in aquaculture diets.

Michael Brown, in South Dakota State University's Department of Wildlife and Fisheries Sciences, says upcoming studies will include diets containing high protein, dried distillers grains with solubles, or DDGS, produced by some corn ethanol plants. He'll include that 42% protein product as one component in the diets of rainbow trout and yellow perch.

To sustain production, fish farmers need to include enough protein in the diets of fish they raise for human consumption, Brown says. Traditionally, the largest share of that protein has come from fish meal derived from ocean species such as menhaden, anchovies,herring and sardine.