A new report urges “extreme caution” in using seismic airguns to explore for fossil fuels underwater, saying it is “indisputable” that the practice has adverse impacts on Arctic marine life, especially whales.
Seismic testing involves a vessel towing an array of airguns that continuously blast loud, low frequency sound waves down through the water column and into the seabed with intervals as short as ten seconds. The operations can go on for weeks on end, depending on the size of area designated for the survey.
“This new study shows how destructive seismic blasting can be for whales yet they continue with their pursuit for oil with no regard for environmental impacts and Inuit rights.”
—Jerry Natanine, Clyde River mayor
“It is clear that noise from seismic activity has an impact on whales as it can damage their hearing, ability to communicate and also displace animals, affecting diving behavior, feeding and migration patterns,” said report author Oliver Boisseau, senior research scientist at Marine Conservation Research, which conducted the study (pdf) for Greenpeace Nordic.
“There are increasing indications that this could cause serious injury,” he said, “and may also disrupt reproductive success and increase the risk of strandings and ice entrapments.”
Narwhals in particular, the report states, have a tendency to “freeze and sink” in response to a threat such as noise, rather than fleeing the area. This means narwhals—an at-risk species shown to be one of the most vulnerable Arctic marine mammals to climate change—are more susceptible to damage from airgun blasts as they are not inclined to avoid regions impacted by noise. In turn, they experience increased stress hormones as well as entrapments as a result of disrupted migration patterns.
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