The body of an Asian carp has been found on the Mississippi River near Winona, 20 miles farther upstream than the previous northernmost siting.
It's particularly significant because the dead carp was found on the sill of a dam.
The D-N-R's Nick Frohnauer says it confirms their assumption that silver carp may use their leaping ability to attempt to overcome barriers.
The D-N-R plans to place an electrical fish barrier upstream at Lock and Dam Number One in Saint Paul. Frohnauer says they're also exploring other technology to limit movement of Asian carp through other locks-and-dams downstream from the Twin Cities.
Silver carp are one of four species of invasive Asian carp threatening the Mississippi River and other native ecosystems. They can grow to 60 pounds, and they impact the base of the food chain by consuming large amounts of plankton that native fish also rely on.