New Zealand Mudsnails
New Zealand Mudsnails How to Prevent the Spread of New Zealand Mudsnails through Field Gear This brochure is a guide for field detection and for treating field gear to prevent the spread of New Zealand mudsnails. It is intended for researchers, monitoring crews, watershed survey groups, and anyone else who travels frequently between aquatic or riparian locations. Second Edition February 2010 1DevilsDevills Lake, Lake, Oregon, Oregon is is heavily heavily infested infested with with New New Zealand Zealand mudsnails.mudsnails. Prevent Prevent the the spread spread of of New New Zealand Zealand mudsnails mudsnails by bycleaning cleaning geargear and and boats boats and and not not moving moving water water fromfrom infested waters waters into into new new bodies bodies of of water. water. (Photo by Jane and Michael Liu.) INTRODUCTION Range Range expansion expansion of of the the mudsnail mudsnail The New Zealand mudsnail hashas been been unwittingly unwittingly hastened hastened by (Potamopyrgus antipodarum) is an anglers,by anglers, hunters, hunters, and and field field person person- - introduced aquatic species that has nel—innel—in other other words, words, people people whowho invaded estuaries,estuaries, lakes,lakes, rivers, rivers, and frequentlyfrequently move move from between one watershed streams streamsand streams in Washington, in Washington, Oregon, Oregon, toand the lakes next, inhauling watersheds, wet waders, hauling nets, California, and many other states andwet other waders, gear nets, with and them. other Once gear withthe in the western U.S. ItIt waswas firstfirst notednoted mudsnailthem. Once is established the mudsnail in ais new estab- in North America in the late 19801980ss inin habitat,lished in it ais new impossible habitat, to it iseradicate impossi - the Snake River and has since spread itble without to eradicate damaging it without other damaging com- throughout the West.
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