Advancing active hydroacoustic methods with broadband echosounders for ecological surveys ...

• Main Author: Dunn, Muriel
• Format: Text
• Language: English
• Published: Memorial University of Newfoundland 2024
• Subjects: Arctic; Climate change
• Online Access: https://dx.doi.org/10.48336/14f6-cd37; https://research.library.mun.ca/16379/

Marine ecosystems are undergoing increasing environmental pressure from climate change and industry developments. These environmental pressures are particularly impacting in the Arctic. Increased monitoring of Arctic marine ecosystems with active acoustic surveys could improve our understanding of the ecological impacts from climate change stressors. However, traditional research vessel-based surveys are very expensive, have limited availability and measure a disrupted pelagic environment by introducing light and noise. We propose that broadband echosounders mounted on uncrewed vehicles, moorings or lowered probes would provide complementary measurements to address these shortcomings. In the case of uncrewed vehicles, they could complement traditional vessel-based surveys by extending the temporal and spatial extent. Because broadband echosounders are relatively new technologies, methods and standard processing procedures need to be modified and tested. The present thesis studies three methods for broadband ...