EARLY HEARING DETECTION AND INTERVENTION VIRTUAL CONFERENCE
MARCH 2-5, 2021
(Virtually the same conference, without elevators, airplane tickets, or hotel room keys)
5/22/2018 | 12:00 PM - 12:15 PM | THE NEW ZEALAND MUDSNAIL: STATE OF THE SCIENCE AND CURRENT STUDIES OF AN EARLY INVASION IN A MICHIGAN RIVER | 430 B
THE NEW ZEALAND MUDSNAIL: STATE OF THE SCIENCE AND CURRENT STUDIES OF AN EARLY INVASION IN A MICHIGAN RIVER
New Zealand mudsnails (NZMS) Potamopyrgus antipodarum, a world-wide invader, are expanding their range throughout North America. In the Laurentian Great Lakes, NZMS populations have been documented since 1991. Secondary invasion of streams and rivers has occurred very recently, where the mechanisms of range expansion and potential impacts are poorly understood. Here we provide a synthesis of the global invasion, and present results from field studies in a high-profile trout stream, the Au Sable River (Michigan, USA). Here NZMS continue to increase their range and densities. Nearly half of trout sampled in a diet analysis contained NZMS, and made up as much as 50% of the gut contents. In a lab experiment NZMS growth is influenced by leaf-litter type, though NZMS do not influence organic matter processing at current densities. A common household cleaner, Formula 409, was found to be highly effective at decontaminating fishing gear during laboratory trials, holding promise as a means of preventing spread. Through research and outreach, we hope to improve understanding of the NZMS invasion, increase public awareness, and help maintain the integrity of freshwaters in the Great Lakes region and elsewhere.
- Invertebrate
- Great Lakes
- Management
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Presenters/Authors
Jeremy Geist
(), Dept. of Biological Sciences, Oakland University, jageist@oakland.edu;
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Mark Luttenton
(), Annis Water Resources Institute, Grand Valley State University, luttentm@gvsu.edu;
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Justin Wegner
(), Annis Water Resources Institute, Grand Valley State University, wegnerju@mail.gvsu.edu;
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Scott Tiegs
(), Dept. of Biological Sciences, Oakland University, tiegs@oakland.edu;
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