new zealand mudsnails: new invaders to wisconsin david rowe fisheries team supervisor...
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![Page 1: New Zealand Mudsnails: New Invaders to Wisconsin David Rowe Fisheries Team Supervisor david.rowe@wisconsin.gov (608) 275-3282](https://reader036.vdocument.in/reader036/viewer/2022081603/56649f225503460f94c3a869/html5/thumbnails/1.jpg)
New Zealand Mudsnails: New Invaders to Wisconsin
David RoweFisheries Team Supervisor
[email protected](608) 275-3282
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What are New Zealand mudsnails?o Less than ¼ inch longo Right handed spiralo Hydrobiidaeo Operculate
o Live in broad range of conditions
o Can reproduce asexuallyo Consumes algae and
detritus
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What are New Zealand mudsnails?
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Distribution in North America
Benson, A. J. 2013. New Zealand mudsnail sightings distribution. Retrieved 12/9/2013 from newzealandmudsnaildistribution.aspx
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Why these snails can be a problem
• May impact the food chain • May outcompete native benthos– mayflies, stoneflies, caddisflies, etc.
• May impact fisheries
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Response so far• Begin public outreach– Inform the public
• Begin distribution assessment– eDNA method development– Benthos survey of High Risk streams
• Identify mechanisms for dispersal– Inform users who may be vectors– Provide guidance on cleaning/preventing spread
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Preventing the SpreadBEFORE leaving the water: • INSPECT equipment and REMOVE plants and
animals• DRAIN all water from equipment• SCRUB equipment with a stiff brush,
including crevices, to remove all mud and snails
• RINSE equipmentwith tap water
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Preventing the Spread
BEFORE entering another stream, switch to a completely new set of gear OR
• FREEZE for 8 hours, or • WASH with 212°F water (steam clean), or• SOAK in 2% Virkon for 20 minutes, then rinse
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Questions? Susan Graham, WDNRLocal AIS [email protected] (608) 275-3329
Kris Stepenuck, [email protected](608) 265-3887 (MTF)(608) 264-8948 (WR)
Laura MacFarland, River Alliancelmacfarland@wisconsinrivers,org(608) 257-2424 x110
Maureen Ferry, WDNRStatewide AIS Monitoring [email protected](608) 261-6450