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MN Department of Natural Resources -- News Releases
Updated: 3 hours 18 min ago

Zebra mussel larvae confirmed in Garfield Lake in Hubbard County

Thu, 09/21/2017 - 12:52pm

An independent laboratory has confirmed zebra mussel larvae in Garfield Lake in Hubbard County.

The lab provided photos of two zebra mussel larvae, called veligers, found in a water sample taken from the lake. Property owners on Garfield Lake hired the lab as part of their own monitoring. Invasive species specialists from the Minnesota Department of Natural Resources found no zebra mussels in the lake during a six-hour dive survey.

Garfield Lake will be added to the Infested Waters List for zebra mussels, with the provision that it may be removed from the list if future surveys continue to show no zebra mussels in the lake.

Whether or not a lake is listed as infested, Minnesota law requires boaters and anglers to:

  • Clean watercraft 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, especially after leaving infested waters:

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

As boat owners begin taking boats and equipment out of the water for the season, the DNR reminds them to carefully check for aquatic invasive species and contact the DNR with any suspected new infestations. Look on the posts, wheels and underwater support bars of docks and lifts, as well as any parts of boats, pontoons and rafts that may have been submerged in water for an extended period.

Minnesota law requires that docks and lifts be allowed to dry for at least 21 days before being placed in another body of water, whether aquatic invasive species are present or not.

People should contact an area DNR aquatic invasive species specialist if they think they have found zebra mussels or any other invasive species that has not already been confirmed in a lake.

More information is available at www.mndnr.gov/AIS.

Zebra mussels confirmed in Lakeville’s Lake Marion

Thu, 09/21/2017 - 12:48pm
City may apply for DNR pilot project treatment

The Minnesota Department of Natural Resources has confirmed zebra mussels in Lake Marion, in the city of Lakeville, in Dakota County.

Five adult zebra mussels were found at the public access by a lake consulting business, as part of an early detection monitoring program conducted for the city of Lakeville. The city may apply for a pilot project treatment after a more thorough search of the lake is completed.

As boat owners begin taking boats and equipment out of the water for the season, the DNR reminds them to carefully check for aquatic invasive species and contact the DNR with any suspected new infestations. Look on the posts, wheels and underwater support bars of docks and lifts, as well as any parts of boats, pontoons and rafts that may have been submerged in water for an extended period.

Minnesota law requires that docks and lifts be allowed to dry for at least 21 days before being placed in another body of water, whether aquatic invasive species are present or not.

Minnesota law requires boaters and anglers to:

  • Clean watercraft 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, especially after leaving infested waters:

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

People should contact an area DNR aquatic invasive species specialist if they think they have found zebra mussels or any other invasive species that has not already been confirmed in a lake.

More information is available at www.mndnr.gov/AIS.

Single zebra mussel confirmed in Lake Harriet

Thu, 09/21/2017 - 12:43pm
Extensive multi-agency search showed no other zebra mussels

The Minnesota Department of Natural Resources has confirmed that a single zebra mussel was removed from Lake Harriet in Minneapolis. Minneapolis Park and Recreation Board (MPRB) staff reported one adult zebra mussel on a boat cover recovered from the bottom of the lake.

No additional zebra mussels were found during 67 hours of diving, snorkeling and wading searches involving the Minnehaha Creek Watershed District, MPRB, two MPRB contractors and the DNR. Lake Harriet will be added to the Infested Waters List for zebra mussels, with the provision that it may be removed from the list if future surveys continue to show no zebra mussels in the lake.

“We’re grateful that no zebra mussels were found during the extensive dive, snorkel and wading search of Lake Harriet,” said Heidi Wolf, DNR invasive species unit supervisor. “Strong partnerships and interagency cooperation are key, and we thank the Minneapolis Park and Recreation Board and the Minnehaha Creek Watershed District for their ongoing efforts.

“While we regret that Lake Harriet will be added to the Infested Waters List because one zebra mussel was confirmed, we’re hopeful that the lake may be removed from the list if future searches continue to show no zebra mussels in the lake,” Wolf said.

DNR invasive species specialist Keegan Lund said Lake Harriet will be carefully monitored the rest of this season and next year, but no treatment is necessary at this time. Lund said individual zebra mussels sometimes die after they are brought into a new lake, before they become established.

“There is a common misperception that zebra mussels are everywhere and that their spread is inevitable. The reality is, of Minnesota’s 11,842 lakes, fewer than 250, about 1.8 percent, are listed as infested with zebra mussels. More Minnesotans than ever before are following our state’s invasive species laws,” Lund said. “People spread zebra mussels, and people can prevent their spread.”

Whether or not a lake is listed as infested, Minnesota law requires boaters and anglers to:

  • Clean watercraft 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, especially after leaving infested waters:

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

People should contact an area DNR aquatic invasive species specialist if they think they have found zebra mussels or any other invasive species that has not already been confirmed in a lake.

More information is available at www.mndnr.gov/AIS.