The invasive Asian carp continues to march northward up the Mississippi River.
The U.S. Geological Survey says carp eggs were recently collected as far north as Lynxville in southwest Wisconsin. That’s about 250 miles upstream from where reproducing populations were found in the past. Officials say the eggs indicate that spawning occurred, but scientists do not know if live fish would be possible from the new discovery.
Bighead and silver Asian carp have infested much of the Mississippi River since the 1970s, after they escaped from fish farms in the South. Adult carp have been found as far north as the Saint Croix River on the Wisconsin-Minnesota border.
The federal government has spent over $200 million on efforts to keep the bloated carp out of the Great Lakes.