No invasive silver carp genetic material was found in a recent resampling of the St. Joseph River after routine testing turned up trace amounts.
The Michigan Department of Natural Resources announced Thursday that in the Sept. 6 resampling no silver carp environmental DNA (eDNA) was found. The invasive fish has overtaken watersheds in other states but has not become established within the Great Lakes basin.
One of 220 samples collected in June on the river near Marina Island by the United States Fish and Wildlife Service contained a positive eDNA result for silver carp, according to a Thursday press release. The Marina Island area is home to multiple marinas and a city boat launch with high recreational use by locals and visitors.