Billions of snow crabs have disappeared from the ocean around Alaska in recent years, and scientists now say they know why: Warmer ocean temperatures likely caused them to starve to death.
The finding comes just days after the Alaska Department of Fish and Game announced the snow crab harvest season was cancelled for the second year in a row, citing the overwhelming number of crabs missing from the typically frigid, treacherous waters of the Bering Sea.at the National Oceanic and Atmospheric Administration, found a significant link between recent marine heat waves in the eastern Bering Sea and the sudden disappearance of the snow crabs that began showing up in surveys in 2021.
"The big take home for me from the paper, and just the whole experience in general, is that historically, fishery scientists had been very worried about overfishing — this has been our white whale, and in a lot of places we really solved that with management," Szuwalski said. "But climate change is really throwing a wrench into our plans, our models and our management systems."
The amount of energy crabs needed from food in 2018 — the first year of a two-year marine heat wave in the region — may have been as much as quadrupled compared to the previous year, researchers found. But with the heat disrupting much of the Bering Sea's food web, snow crabs had a hard time foraging for food and weren't able to keep up with the caloric demand.
Temperatures around the Arctic have warmed four times faster than the rest of the planet, scientists have reported. Climate change has triggered a rapid loss in sea ice in the Arctic region, particularly in Alaska's Bering Sea, which in turn has amplified global warming. Avoid non-essential travel to these Caribbean islands due to natural disaster risk: Canadian officials
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