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DNR to expand list of prohibited species in Minnesota

The DNR is taking public comments until Dec. 9. The new rules will likely take effect sometime in the spring.

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The northern snakehead fish can survive in water with low oxygen levels, allowing it to out-compete some native fish species.
Courtesy / USGS via MPR News
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MOORHEAD -- The Minnesota DNR wants to expand the list of prohibited invasive species. Thirteen species or species groups have been identified as high risk.

The species proposed to add to the prohibited list range from snakehead fish to jumping worms to mitten crabs.

The agency is currently taking public comment on the proposal.

Adding an invasive species to the prohibited list allows the agency to impose criminal or civil penalties on anyone who violates the prohibition.

"Species on the prohibited invasive species list include species like Eurasian watermilfoil, and zebra mussel that people might be familiar with. These are species where it's not allowed to possess, import, purchase, transport or introduce those species except under a permit," said DNR terrestrial invasive species program coordinator Laura Van Riper.

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Some species, like jumping worms, and a reed called non-native phragmites, are already found in Minnesota, but most of the 13 species have not yet reached the state.

The U.S. Geological Survey maintains a database and tracks the spread of invasive species across the country.

Van Riper said staying ahead of the constantly moving invasive species like snakehead fish or jumping worms is important, because they can cause significant disruption if they become established.

"You can have changes to the whole food chain. You can have competition between native species and non-native species. You can see kind of a cascading number of effects in lakes when different invasive species are introduced," she said. “We’ve really learned with invasive species that an ounce of prevention is worth a pound of cure.”

For example, the snakehead fish can eat native fish species, and survive low oxygen levels in water, allowing it to outcompete native fish.

Floating yellow heart can create dense floating mats of vegetation, blocking out native aquatic species.

The DNR is taking public comments until Dec. 9. The new rules will likely take effect sometime in the spring.

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