TRAVERSE CITY, Mich. (AP) — Michigan’s U.S. senators say a recent discovery about small fish and electric barriers shows the need for quick action to prevent Asian carp from reaching the Great Lakes.

The U.S. Fish and Wildlife Service reported last week that some juvenile fish could be caught in underwater spaces beneath commercial barges and pulled across electric barriers near Chicago meant to keep the invasive carp away from Lake Michigan.

In a letter Thursday to the Office of Management and Budget, Sens. Debbie Stabenow and Gary Peters request funding of interim measures while the Army Corps of Engineers studies whether defenses could be upgraded at a nearby lock and dam complex.

The Corps says it may put more electric barriers at the Brandon Road Lock and Dam or test new technologies there.