International Sailing Events Causing Harm to Marine Wildlife Due to Noise Pollution, Study Finds

International sailing events could be harming marine wildlife due to underwater noise pollution from vessels, researchers have warned.

A study led by Heriot-Watt University’s Institute of Life and Earth Sciences in Edinburgh found that sustained noise from hundreds of motorised boats at sailing regattas could be causing stress to marine mammals, fishes, and invertebrates. These animals rely on intricate hearing systems for processes such as foraging, communicating, reproducing, and avoiding predators.

The research, published in Marine Pollution Bulletin, focused on the 36th America’s Cup in the Hauraki Gulf, New Zealand, in 2021. The study found that the noise from spectator boats during the event was loud and sustained enough to potentially force marine life out of their natural habitats.

With thousands of sailing regattas taking place worldwide each year, researchers are urging event organizers to make greater efforts to limit the impacts of underwater noise from motorized vessels. Measures such as restricting spectator vessel speeds and staggering exits to break up flotillas into smaller groups have been suggested to reduce noise levels.

Matt Pine, a marine scientist specializing in ocean bioacoustics, emphasized the importance of considering the potential impact of underwater noise pollution when planning sailing events, especially in ecologically significant areas. He highlighted that noise pollution can increase stress levels in marine species and disrupt their reproductive, foraging, and social behaviors.

As concerns grow over the impact of sailing events on marine wildlife, researchers are calling for further improvements to mitigate underwater noise pollution and protect vulnerable species. America’s Cup organizers have been contacted for comment on the issue.