Exotic Species - WISCONSIN LAKES-PUB-FM-800 99Rev.

WISCONSIN LAKES-PUB-FM-800 99Rev.

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Exotic Species - Please don't let them hitch a ride with you!

Exotic species are plants and animals not native to Wisconsin. Some exotic fish species were intentionally introduced in the late 1800's to enhance sport fishing opportunities, but yielded mixed results. For example, the steelhead (migratory rainbow trout) fishery provides anglers with an exciting challenge on Wisconsin's Great Lakes. Carp, however, wreak havoc on spawning sites for many game fish and are no longer welcome or stocked.

Once introduced into a new environment, many exotics are capable of causing major disruptions to natural communities. More recent accidental newcomers like the zebra mussels, Eurasian water milfoil, the ruffe, and spiny water fleas are very destructive and aggressive aquatic invaders that are a cause for concern. These pests are easily transported by unsuspecting people via boats and fishing gear. Once established, these exotics rarely can be erradicated.

It only takes one careless boater to infest a lake or river. Help prevent the spread of harmful, exotic plants and animals by taking the following precautions when transferring your boat:

• Remove aquatic plants and animals from all parts of your boat, trailer and accessory equipment. Dispose of the removed material in the garbage either at the water access area (if cans are available) or at home.
• Drain all water from your boat including your bilges, live wells and other containers before leaving the water access area.
• Do not transfer water from one water body to another or release live bait or aquarium pets into any waters.
• Wash your boat and trailer thoroughly with regular tap water when you get home. Flush water through your motor's cooling system, live wells and other areas that hold water. (Preferably, dry your boat and equipment for 3 days in a sunny location before transferring it to a new body of water.)

By working together we may be able to protect our waters form unwelcome aquatic invaders. Remember... Clean boats - Clean waters!

Produced by: Wisconsin Department of Natural Resources, Bureau of Watershed Management
For more information on this topic: James Vennie, Limnologist, (608)266-2212

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