Minnesota
Minnesota scientists are unraveling the mystery behind the state's walleye strains
Working in a darkened laboratory, Laurel Sacco dips a cup into a large tank of water and scoops up dozens of young walleye. She pours one into a petri dish and examines it under a microscope. The fry has been harvested from Pine River near the headwaters of the Mississippi River where the Minnesota Department of Natural Resources has historically s…