Deep-sea mining could impact tuna fisheries - study
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[July 11, 2023]
MELBOURNE (Reuters) - Deep-sea mining could interfere with
migration of tuna that is expected to be driven by climate change to
areas of the Pacific Ocean currently slated for mining activity, a study
released on Tuesday showed.
The Nature Sustainability journal study, which centered on three species
of tuna, found climate change would likely change their migration
patterns. That raised the potential for conflict between some of the
world’s most valuable fisheries and the prospective mining in the
Clarion-Clipperton Zone southeast of Hawaii. |
A Greenpeace activist holds a sign as he
confronts the deep sea mining vessel Hidden Gem, commissioned by
Canadian miner The Metals Company, as it returned to port from eight
weeks of test mining in the Clarion-Clipperton Zone between Mexico and
Hawaii, off the coast of Manzanillo, Mexico November 16, 2022.
REUTERS/Gustavo Graf/File Photo |
Mining companies say the ocean floor is potentially rich in
metals including nickel and cobalt used in batteries for
electric vehicles, so their extraction will support the global
energy transition.
The U.N. body that regulates the sector is expected to press
pause on plans to extract minerals from the ocean floor when it
meets this month due to environmental and economic risks.
“The high seas harbor a trove of biodiversity, and there are
critical sectors of our economy that depend on this
biodiversity,” said study co-author Dr. Juliano Palacios
Abrantes from the University of British Columbia.
“There is already uncertainty about the impact of climate change
on the health and geographic range of tuna. Deep-sea mining will
only add to this uncertainty, further threatening tuna species
and associated fisheries.”
Potentially impacting the fish would be plumes of sediment
stirred up by mining of sea nodules and any associated noise or
light pollution that could impact reproduction rates, among
other issues, the study found.
The research was released alongside a letter from seafood
industry groups advocating for a pause in deep-sea mining
development until the socioeconomic and environmental impacts
could be more thoroughly analyzed.
"In the vast expanse of the high seas, critical for tuna
species, we find ourselves sailing into uncharted territory with
the unknown risks posed by deep-sea mining,” said Daniel Suddaby,
executive director at Global Tuna Alliance whose 48 industry
partners account for 32% of the global tuna trade.
(Reporting by Melanie Burton; Editing by Lincoln Feast.)
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