MN DNR captures and tags silver carp in St. Croix River


The Minnesota Division of All-natural Sources has implanted a modest tracking device in a silver carp captured on the St. Croix River Tuesday. This is the 1st time the DNR has tagged a silver carp, an invasive species that competes with native species for meals.

The tagged silver carp will give the DNR with important information on the movement and habits of this invasive species in the river program. The capture and tagging of the carp was a direct outcome of the DNR’s tracking of a previously tagged bighead carp.

The DNR and a contracted industrial fishing enterprise had been tracking and attempting to net the tagged bighead carp Tuesday when they captured the silver carp two miles south of the I-94 bridge more than the St. Croix River.

“We count on this tagged silver carp to give helpful info about the species’ habits, as has been the case with the previously tagged bighead carp,” mentioned DNR invasive fish coordinator Nick Frohnauer. “Since carp have a tendency to congregate, we’re also hopeful that the tagged silver carp will lead us to any other person invasive carp that may perhaps be in the location, just as the tagged bighead carp has.” The tagged bighead carp has led to 4 invasive carp discoveries this year and two final year.

A couple of extra invasive carp than usual have been captured in 2019, most likely for the reason that persistent higher water in southern Minnesota, Iowa and Illinois made prolonged “open river” circumstances in which fish could move up the Mississippi River unimpeded by the river’s locks and dams. Open river circumstances can advantage native species like lake sturgeon and paddlefish, which swim hundreds of miles in search of preferable habitat. Sadly, these circumstances also let other, non-native species to move upriver extra effortlessly.

Frohnauer noted that, although the DNR continues to be concerned about the prospective impacts of invasive carp in Minnesota waters, person adult fish captures do not indicate reproduction or an established population of invasive carp in the Mississippi River or elsewhere in the state. Person invasive carp have been caught as far upstream as Mississippi River Pool two close to the Twin Cities (bighead, grass, and silver), the King Energy Plant on the St. Croix River by Oak Park Heights (bighead), and just downstream of Granite Falls in the Minnesota River (bighead).

Invasive carp have been progressing upstream considering that escaping into the Mississippi River from southern state fish farms in the 1970s. These massive, filter feeding fish compete with native species and pose a threat to rivers and lakes.

The DNR Invasive Species System has constructed partnerships with state and federal agencies, conservation groups, university researchers and industrial companies to stop the spread of invasive carp. The 2015 closure of the Mississippi River lock at Upper St. Anthony Falls in Minneapolis was a main accomplishment resulting from these efforts.

Invasive carp captures need to be reported to the DNR promptly. Get in touch with 651-587-2781 or e mail [email protected] Take a photo and transport the carp to the nearest DNR fisheries workplace or make arrangements for it to be picked up by a DNR official.


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