2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 10:00 AM - 10:15 AM | DISCERNING CYCLIC PATTERNS AND HABITAT VARIATION IN UNDERWATER SOUNDSCAPES IN THE LAURENTIAN GREAT LAKES | 310 A
DISCERNING CYCLIC PATTERNS AND HABITAT VARIATION IN UNDERWATER SOUNDSCAPES IN THE LAURENTIAN GREAT LAKES
Passive acoustic monitoring (PAM) is a non-invasive method that can be used to assess the underwater soundscape, and through it the health of an ecosystem, by providing researchers with a non-biased comprehensive ecosystem visualization. While PAM has a rich history in marine systems, it is less commonly used in freshwater, limiting our understanding of sound levels in freshwater habitats. Here we measure timing and location-based variation in sound in the Laurentian Great Lakes (LGL) to estimate the likelihood of adverse effects on native fish. Sound levels varied in areas with recreational boating on a diurnal cycle, with levels up to 140 dB re 1µPa/Hz in the morning and evening and quieter periods midday. Areas without boats had no clear patterns and were generally quieter, where peak sound energy was concentrated around 100 Hz and below. Areas with increased boat traffic had significant sound energy at 800-1000 Hz, a bandwidth that overlaps with fish species possessing hearing specializations. While still preliminary, these results identify the potential for habitat-specific noise effects in the LGL and allow us to test potential for anthropogenic effects in local fish species of interest.
- Fish
- Great Lakes
- Anthropogenic
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Presenters/Authors
Daniel Heath
(), University of Windsor, Biological Sciences, dheath@uwindsor.ca;
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Megan Mickle
(), University of Windsor, micklem@uwindsor.ca;
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Dennis Higgs
(), University of Windsor, dhiggs@uwindsor.ca;
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