The noise of bottom trawling in or near underwater canyons can disturb protected mammals such as fin whales and beaked whales in important feeding grounds and along migratory paths, researchers at National University of Ireland Galway report. The team, based with iCRAG, the Science Foundation Ireland Research Centre for Applied Geosciences, in NUI Galway's Ryan Institute, used hydrophones to record the impact of working trawlers on the marine environment in two surveys in the Irish Sea and Celtic Sea.
source https://phys.org/news/2020-12-marine-trawling-noise-mammals.html
