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Aquatic Invasive Species Recently Confirmed in County Lakes

Web posted September 14, 2021
The Minnesota Department of Natural Resources has confirmed zebra mussels in Horseshoe Lake, near the city of Crosslake in Crow Wing County.

A Crow Wing County watercraft inspector found adult zebra mussels attached to an aquatic plant that was removed from a boat and trailer at the Horseshoe Lake public access. DNR aquatic invasive species specialists found adult zebra mussels at opposite ends of the west bay of Horseshoe Lake during a followup search.

A lake property owner found adult zebra mussels while fishing on the east side of Lower South Long Lake. DNR staff confirmed a broad distribution of zebra mussels in the lake. They found no zebra mussels upstream or downstream of the lake and will continue to monitor waters connected to the lake. DNR AIS specialist also confirmed faucet snails in Lower South Long Lake downstream of the fishing pier at the County’s wayside park. This is the first time faucet snails have been introduced to Crow Wing County waterbodies.

Whether or not a lake has any invasive species, Minnesota law requires boaters and anglers to:
• Clean watercraft and trailers of aquatic plants and prohibited invasive species,
• Drain all water by removing drain plugs and keeping them out during transport, and
• Dispose of unwanted bait in the trash.

Some invasive species are small and difficult to see at the access. To remove or kill them, take one or more of the following precautions before moving to another waterbody:

• Spray with high-pressure water.
• Rinse with very hot water (120 degrees for at least two minutes or 140 degrees for at least 10 seconds).
• Dry for at least five days.

Zebra mussels can compete with native species for food and habitat, cut the feet of swimmers, reduce the performance of boat motors and cause expensive damage to water intake pipes.

Anyone who suspects a new infestation of an aquatic invasive plant or animal should note the eact location, take a photo or keep the specimen, and contact a Minnesota DNR aquatic invasive species specialist.

More information is available at mndnr.gov/ais.

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