Genetic evidence of Eurasian ruffe, an invasive species in the perch family, has been found for the first time in southern Lake Michigan, a conservation group said Tuesday.
The Nature Conservancy said a team of researchers from the University of Notre Dame, Central Michigan University and its own organization found evidence of DNA of Eurasian ruffe in Calumet Harbor, south of Chicago.
Two positive samples from the harbor were collected on July 8. The harbor is at the mouth of the Chicago-area waterway system. Environmental DNA is a surveillance tool that can be used to monitor the genetic presence of aquatic species.