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Zebra Mussels Discovered in Enemy Swim Lake

Pierre, S.D. – The South Dakota Department of Game, Fish and Parks (GFP) has confirmed the presence of zebra mussels in Enemy Swim Lake in Day County.
Enemy Swim Lake is now considered infested with zebra mussels.
“The peak of summer is upon us and water users need to make sure they are practicing ‘clean, drain, dry’ every time they are on the water,” said Aquatic Invasive Species Coordinator, Tanner Davis.
All watercraft encountering a Watercraft Inspection/Decontamination (WID) station including non-motorized watercraft (canoes, kayaks, SUPs, and inflatables) need to be inspected. GFP has inspection stations across the state including northeast South Dakota. Inspection stations are the first line of defense in preventing the spread of aquatic invasive species. GFP WID stations are equipped with hot water sprayers (140-120˚F) that are able to kill any residual invasive mussel tissue or other aquatic invasive species.
Completely draining and drying a boat are the first steps in making sure invasive species are not transferred to other waters. It is important to note that invasive Zebra/Quagga mussels can survive up to 30 days out of water.
Mid-summer is a great time to start looking at submersed equipment such as boat docks, boat lifts, and hard substrate such as rocks and woody debris for zebra mussels. Zebra mussels can vary in size, depending on the age of the mussel. Newly formed mussels can be as microscopic as grains of sandpaper, while adults can grow to two inches in length. GFP encourages boaters to feel along their watercraft below the waterline for any roughness which may indicate that newly formed mussels, called settlers, may have attached.
For more information on zebra mussels, other aquatic invasive species, and how to properly decontaminate your watercraft, or to report potential infestations please visit sdleastwanted.sd.gov and report findings on the Citizen Monitoring page or email tanner.davis@state.sd.us.
CONTACT: Tanner Davis, GFP Aquatic Invasive Species Coordinator

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