Minnesota’s aquaculture industry consists of – food fish, fingerling for stocking and bait fish.
Today, food fish is mainly produced by fish farms that raise trout and tilapia. These trout farms are typically located at a source of spring water where a constant water temperature is maintained. Among them, Stockton Trout Farms, located in Stockton, MN provides a continuous supply of fresh trout with estimated annual revenues of $100,000. Stockton Farms’ ability to compete in the trout market is fairly limited as the State of Idaho, with an abundance of spring water, produces far more quantities of trout.
MinAqua Fisheries annually produces more than one million pounds of tilapia with an estimated value of $1.5 million. The tilapia is raised in a 640’ x 120’ indoor fish barn containing more than two million gallons of water. The waste heat from the nearby sugar beet plant is reused to heat the fish barn year round. The water is reused within its system to conserve both water and heat. The final discharge goes through a settling pond before entering the Renville city sewer treatment plant. All of MinAqua’s products are trucked live in water and sold primarily in Toronto and Vancouver for the Asian niche market. Market limitations include the size of the Asian population in these localities – the total live market size for both Canada and the United States is about 20 million pounds per year.
Source: 2008 Aquaculture Annual Report
MN Dept of Natural Resources permits commercial fisheries http://www.dnr.state.mn.us/permits/fishery/index.html
The Minnesota Pollution Control also would be involved for a commercial operation to allow for discharge from the facilities for land application of the waste water.