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Invasive Species Resources

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Maine Department of Environmental Protection.
In 2008, the purchase of a new sticker for owners of Maine-registered watercraft was automatically combined with the watercraft registration fee. The sticker, which now reads "Stop Aquatic Hitchhikers -- Preserve Maine Waters" and is physically attached to the Maine watercraft registration, has been required since 2002 for all motorized watercraft on inland waters. Owners of non-Maine registered boats will continue to be required to purchase and affix a separate nonresident sticker. 
Maine Department of Environmental Protection.

University of Arkansas. Cooperative Extension Service.

Montana Fish, Wildlife, and Parks.
Montana Department of Livestock. Animal Health Division.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Michigan. Museum of Zoology.
University of Arkansas. Cooperative Extension Service.
See also: Common Disease Problems for more fact sheets.
New Mexico Department of Game & Fish.
Montana State University.
The Center for Invasive Species Management closed in 2015. Archives of relevant materials are available here.