At the DNR walleye egg collection and fertilization station on the Pike River near Pequot Lakes, Minn., walleyes preparing to spawn swim upriver, right to left, and are directed into nets. The fish are then separated into males and females, and the female

At the DNR walleye egg collection and fertilization station on the Pike River near Pequot Lakes, Minn., walleyes preparing to spawn swim upriver, right to left, and are directed into nets. The fish are then separated into males and females, and the females' eggs are stripped before being fertilized and "washed'' in preparation for transport to a state fish hatchery.(Photo By Dennis Anderson/Star Tribune via Getty Images)