Brazil: Deep-sea mining could impact tuna fisheries

Deep-sea mining could interfere with tuna migration, which is expected to be driven by climate change, into areas of the Pacific Ocean currently earmarked for mining activity, a study released on Tuesday showed. The study in the journal Nature Sustainability, which centered on three species of tuna, found that climate change was likely to change their migration patterns. This has increased the potential for conflict between some of the world's most valuable fisheries and prospective mining in the Clarion-Clipperton Zone, southeast of Hawaii. Miners 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 UN body that regulates the sector is expected to halt plans to extract minerals from the ocean floor when it meets this month due to environmental and economic risks. "The high seas are home to a treasure trove of biodiversity, and there are critical ...