COLUMBUS, Ohio -- Bighead carp DNA has been discovered in eastern Ohio's Muskingum River, raising concerns the invasive fish might have found a new route to Lake Erie.
A report released Friday indicated the genetic material was found in 10 of 222 water samples taken from the river last fall, various news outlets reported.
Researchers found the DNA 80 miles upstream of the river's mouth at Marietta, along the Ohio River. No fish have been found.
The U.S. Fish and Wildlife Service plans to conduct additional tests in the Muskingum River in June.
Invasive carp pose a threat to local ecosystems and to Lake Erie's $1 billion-a-year fishing industry and $10 billion-a-year tourism industry.
Authorities worry that fish living in rivers could reach the lake, especially during flooding.