"A hydrophone in this shipping corridor off Baffin Island, Nunavut, captures their calls as the tusked whales navigate their autumn migration route to northern Baffin Bay. But as the Nordic Odyssey, a 225-metre ice-class bulk carrier servicing the nearby iron ore mine, approaches, its low engine rumble gives way to a wall of sound created by millions of collapsing bubbles from its propeller."
"I have yet to find any marine species that is completely immune to noise or vibration of any kind Lindy Weilgart Narwhals stop calling or move away from approaching vessels when they hear them, says Alexander James Ootoowak, an Inuk hunter from Pond Inlet and field technician with the research team that deployed the hydrophone to study these acoustic overlaps."
A hydrophone in Tasiujaq (Eclipse Sound) off Baffin Island recorded narwhal clicks and whistles during their autumn migration to northern Baffin Bay. As the Nordic Odyssey, a 225-metre ice-class bulk carrier, approached, propeller cavitation produced a wall of sound from millions of collapsing bubbles that masked narwhal signals. Narwhals stopped calling or moved away from approaching vessels. Research carried out in 2023 adds to evidence that underwater radiated noise from hulls, propellers and machinery disrupts marine life. Calls are increasing to design quieter ships and pursue international policy measures through the International Maritime Organization.
Read at www.theguardian.com
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