Updated:
Original:

Oh, carp! Invasive fish keep moving north; they're on the St. Croix now

The Minnesota DNR confirms that both silver and bighead carp were found on the St. Croix last week.

Invasive carp are advancing further north and now both of the major invaders have reached the river that separates Minnesota from Wisconsin.

Minnesota's Department of Natural Resources confirmed Thursday that a silver carp was caught on the St. Croix near Prescott, Wisconsin, last week.

"This news is disappointing but not unexpected," the DNR's invasive fish coordinator said in the agency's statement.

Bighead carp had already been found on the St. Croix and both of the invasive fish live in the Mississippi River. Prescott is where the St. Croix empties into the Mississippi.

Why is this a problem?

Invasive carp – also known as Asian carp because they're native to that continent – are really big eaters. They can eat up to 20 percent of their weight per day and some of the fish grow to more than 100 pounds, the National Wildlife Foundation says. They eat the same stuff native fish eat (plankton) but the invaders don't leave much of it for the locals.

Also, in places where there are a lot of them, silver carp start to leap up out of the water. They especially do this when they are spooked by boat motors. When hundreds of really big fish start jumping in the air, boating stops being much fun, as videos like this and this show.

They might only be visiting the St. Croix

So they've now been found on the St. Croix, but that doesn't necessarily mean they're going to start breeding and raising invasive fish families there.

DNR invasive fish coordinator Nick Frohnauer says the carp caught last week were in an area where lots of different kinds of fish spend the winter. As the water warms up in the spring, those carp may well have moved back onto the Mississippi.

Then again, they might have moved further up the St. Croix. There's no way to be sure right now but the DNR says it will step up its monitoring of the area.

Learn more

Invasive carp have already moved most of the way up the Mississippi River. Minnesota naturally wants to keep them out of the northern lakes where fishing is big business. And keeping them out of the Great Lakes is a priority for all the adjacent states and provinces.

Minnesota has an Invasive Carp Action Plan that was revised a few years ago. Lots of states and provinces are working together in an Asian Carp Regional Coordinating Committee that also has an action plan for 2017.

The National Park Service has a good overview about invasive carp. And the U of M has an Aquatic Invasive Species Research Center that's working on how to stop them from advancing.

Next Up

st. paul tap - crop

SUV driver crashes into bar patio, injuring woman; man hurt in related shooting

Two men were arguing on the patio prior to the incident, witnesses said.

bicycle cyclist bike

Cyclist critically injured in hit-and-run in Plymouth

Police are seeking the public's help in locating the driver who fled.

ambulance, crash

Second person dies after head-on crash in Anoka County

The crash injured three others, including a 4-year-old boy.

Alex Rodriguez

A-Rod, Lore, Taylor don't take questions about Rosas, Simmons

They did discuss how they see a bright future in Minnesota.

pixabay - tree chainsaw trunk trim cut

Large tree branch falls on MN man, crushing him to death

Police said the man was out in the yard, doing tree trimming work with his son.

Screen Shot 2021-09-27 at 11.19.01 AM

AEW to debut in Minnesota with Rampage, Full Gear PPV

The upstart wrestling promotion has soared in popularity.

covid-19, coronavirus

Minnesota's COVID-19 update for Monday, September 27

The latest COVID-19 numbers from the Minnesota Department of Health.

ashley Carlson

Woman reported missing since Friday, last seen near Hinckley

She doesn't have any of her personal belongings with her.

Valleyfair

ValleySCARE returns this Saturday with new attractions

It's the first time the Shakopee park has been open for the Halloween-themed attractions since 2019.

Mary Moriarty

Mary Moriarty, former chief public defender, is running for Hennepin County Attorney

Current county attorney Mike Freeman isn't seeking re-election.

Related

Here's why the DNR put an invasive carp back in the St. Croix

It's part of the fight to keep the fish out of the state

Commercial fisherman catches 30-pound bighead carp in St. Croix River

According to the DNR, the fish was caught Thursday near Prescott, Wisconsin. The Pioneer Press reports it's among a dozen invasive Asian carp caught along the Minnesota/Wisconsin border since 1996.

For St. Croix River boaters, it's life in the slow lane this week

5 miles an hour will have to be top speed at least through the weekend.

For St. Croix River boaters, it's life in the slow lane this week

5 miles an hour will have to be top speed at least through the weekend.

Bill in Washington would close St. Anthony Falls lock if Asian carp are found

The Army Corps of Engineers wants authority to close the lock and dam at Minneapolis' St. Anthony Falls at a moment's notice if invasive carp are found nearby. Supporters of the idea include the Minnesota DNR and Sen. Amy Klobuchar, who say stopping the migration of Asian carp up the Mississippi is needed to protect northern Minnesota waters.