New Zealand Mudsnails: New Invaders to Wisconsin David Rowe Fisheries Team Supervisor...
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Transcript of New Zealand Mudsnails: New Invaders to Wisconsin David Rowe Fisheries Team Supervisor...
New Zealand Mudsnails: New Invaders to Wisconsin
David RoweFisheries Team Supervisor
[email protected](608) 275-3282
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
What are New Zealand mudsnails?
Distribution in North America
Benson, A. J. 2013. New Zealand mudsnail sightings distribution. Retrieved 12/9/2013 from newzealandmudsnaildistribution.aspx
Why these snails can be a problem
• May impact the food chain • May outcompete native benthos– mayflies, stoneflies, caddisflies, etc.
• May impact fisheries
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
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
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
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