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New Zealand M udsnails : New I nvaders to Wisconsin

New Zealand M udsnails : New I nvaders to Wisconsin. David Rowe Fisheries Team Supervisor david.rowe@wisconsin.gov (608) 275-3282. What are New Zealand mudsnails?. Less than ¼ inch long Right handed spiral Hydrobiidae Operculate. Live in broad range of conditions

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New Zealand M udsnails : New I nvaders to Wisconsin

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  1. New Zealand Mudsnails: New Invaders to Wisconsin David Rowe Fisheries Team Supervisor david.rowe@wisconsin.gov (608) 275-3282

  2. What are New Zealand mudsnails? • Less than ¼ inch long • Right handed spiral • Hydrobiidae • Operculate • Live in broad range of conditions • Can reproduce asexually • Consumes algae and detritus

  3. What are New Zealand mudsnails?

  4. Distribution in North America Benson, A. J. 2013. New Zealand mudsnail sightings distribution. Retrieved 12/9/2013 from newzealandmudsnaildistribution.aspx

  5. Why these snails can be a problem • May impact the food chain • May outcompete native benthos • mayflies, stoneflies, caddisflies, etc. • May impact fisheries

  6. 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

  7. Preventing the Spread BEFORE 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 • RINSEequipment with tap water

  8. 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

  9. Questions? Maureen Ferry, WDNR Statewide AIS Monitoring • Maureen.Ferry@wisconsin.gov • (608) 261-6450 Susan Graham, WDNR Local AIS coordinator Susan.Graham@wisconsin.gov  (608) 275-3329 Kris Stepenuck, UW-Ext • kfstepenuck@wisc.edu • (608) 265-3887 (MTF) • (608) 264-8948 (WR) Laura MacFarland, River Alliance lmacfarland@wisconsinrivers,org (608) 257-2424 x110

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