2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 11:15 AM - 11:30 AM | EVALUATING EARLY DETECTION MONITORING PROTOCOLS OF NEW ZEALAND MUDSNAILS USING QUALITATIVE SURVEYS | 430 B
EVALUATING EARLY DETECTION MONITORING PROTOCOLS OF NEW ZEALAND MUDSNAILS USING QUALITATIVE SURVEYS
New Zealand mudsnails are a recent invader to the state of Michigan, initially detected in non-targeted surveys in the Pere Marquette River in 2015, and have since been found in the Au Sable, Boardman, Manistee and Pine Rivers. Our first goal was to design and implement targeted qualitative surveys across rivers that were preserved to be at risk of invasion. 227 qualitative surveys were conducted across 14 different rivers in 2017. In implementing these surveys, a natural question is how efficient are qualitative searches in detecting mudsnails when present. As such, our second goal was to estimate the detection probability for qualitative surveys. We implemented a split-plot type of sampling design, and found that when mudsnails were found in one sub-plot, they were also generally found in the other sub-plot. Time until first detection was recorded for each searcher and then was compared to a qualitative level of density recorded for each searcher. A shorter time to first detection was correlated with a higher level of qualitative abundance. The targeted qualitative survey was determined to be a highly effective early detection tool.
- Invertebrate
- New Methods
- Assessment
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Presenters/Authors
Samantha Stanton
(), Michigan State University , tanksama@msu.edu;
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Seth Herbst
(), Michigan Department of Natural Resources, HerbstS1@michigan.gov;
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William Keiper
(), Michigan Department of Environmental Quality, keiperw@michigan.gov;
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Daniel Hayes
(), Michigan State University , hayesdan@msu.edu;
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