The Department of Natural Resources says testing at two southern Michigan lakes for illegal carp found no signs that the fish were reproducing in the waterways.
The agency announced Wednesday that results from grass carp environmental DNA sampling done in Marrs and Washington lakes in Lenawee County were negative. The samples were collected as a result of earlier observations and collections of grass carp in Marrs Lake in May and June.
The DNR says no juvenile grass carp were seen. The agency says grass carp may have been in Marrs Lake more than a decade.
Grass carp are considered a species of Asian carp although they don't pose the same risk to the ecosystem. According to the DNR, they eat important plants and can disrupt fish habitat.