Sailing Regattas’ Noise Pollution Threatens Marine Life, Study Finds

Sailing Regattas’ Noise Pollution Threatens Marine Life, Study Finds

A recent study led by Heriot-Watt University’s Institute of Life and Earth Sciences has revealed the potential harm that sustained noise from motorised boats at sailing regattas can cause to marine mammals, fishes, and invertebrates. The research, published in Marine Pollution Bulletin, focused on the impact of spectator boats during the 36th America’s Cup in New Zealand.

The study found that the noise from large groups of spectator boats was not only loud but also sustained for long periods, leading to stress in marine life and potentially forcing them out of their natural habitats. With thousands of sailing regattas taking place worldwide each year, researchers emphasized the need for events to take greater measures in limiting the impacts of underwater noise from motorised vessels.

During the America’s Cup event, which attracted nearly 300,000 in-person visitors, researchers recorded significant increases in sound levels around the racecourse, with levels being five decibels higher on race days compared to non-race days. The noise levels extended several kilometers beyond the racecourse boundaries, affecting marine life in the surrounding areas.

To address these concerns, researchers suggested various protection measures, including restricting spectator vessel speeds, introducing designated areas for spectator boats, and using marine mammal detection platforms to identify when animals are nearby. Additionally, staggering the exit of spectator flotillas, encouraging spectators to watch from land locations, and providing guidance on reducing noise from vessels were recommended.

Matt Pine, a marine scientist involved in the study, highlighted the importance of considering the potential impact of underwater noise pollution from spectator boats when planning sailing events, especially in ecologically significant areas. He emphasized that noise pollution can increase stress levels in marine species, affecting their reproduction, foraging, and social interactions, and even causing them to avoid or move away from their habitats.

As concerns grow over the impact of noise pollution on marine life, it is essential for event organizers and participants to adopt practices that minimize underwater noise and protect the delicate ecosystems that rely on sound for survival.