DNR tags 1st silver carp in St. Croix River, hoping to monitor movements of the invasive species – Twin Cities


The Minnesota Division of All-natural Sources is ratcheting up its surveillance on invasive silver carp in the St. Croix River.

Just after capturing many of the carp more than the previous couple of years, the DNR, for the 1st time, place a tracker on a single silver carp final week that need to shed light on its movements.

A silver carp was implanted with a tracker earlier Sept. 10, 2019 and released by the Minnesota Division of All-natural Sources back into the St. Croix River. (Courtesy of MN DNR)

“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 could be in the region,” stated Nick Frohnauer, DNR invasive fish coordinator.

The silver carp is just a single of many Asian carp species the DNR has been watching. The division currently has been actively tracking bighead carp, in reality, that is how the silver carp was captured and implanted.

The DNR and a contracted industrial fishing company had been tracking and attempting to net a tagged bighead carp when they captured the silver carp two miles south of the Interstate 94 bridge more than the St. Croix River in Washington County.

Frohnauer stated higher water has contributed to the invasive fish acquiring previous barriers and into the St. Croix.

The 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 locks and dams.

Person invasive carp (largely bighead) have been caught as far upstream as Mississippi River Pool two close to the Twin Cities, the King Energy Plant on the St. Croix River by Oak Park Heights and just downstream of Granite Falls in the Minnesota River.

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


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