Idaho is a leader in the national aquaculture industry, producing over 70 percent of the nation's commercially grown rainbow trout. Expansion of aquaculture is limited by the threat of domestic and foreign pathogens, which can close both domestic and foreign markets, by competition for markets, by limited supplies of marine protein requiring feed producers to switch to protein sources produced from grains and oilseeds, thus altering phosphorus availability, by lack of innovation in husbandry technology, particularly in determining the sex of sturgeon, and by limited water resources. Further public opinion affects the aquaculture industry, but little is known about attitudes toward aquaculture and its products. These studies will be conducted to address high-priority impediments to expansion of aquaculture, namely fish health management, optimum
phosphorus levels in diets, sex determination in sturgeon, consumer attitudes to consumption of aquaculture products and improved production efficiency.