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Fisheries managers, biologists say snow crab’s decline from climate change. Fishers, experts blame fishing practices like trawling bycatch.
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 ...
Between 2018 and 2021, there was an unexpected 92% decline in snow crab abundance, or about 10 billion crabs. The crabs had been plentiful in the years prior, puzzling scientists and crabbers alike.
The driver of this trend was the northeast Pacific marine heatwave, [9] ... population spurred the closing of the Alaska snow crab season for the first time in ...
In search of 10 billion missing snow crabs, scientists eye marine heat waves. Evan Bush. October 20, 2023 at 4:12 PM ... The mass die-off shuttered the snow crab season during the winter of 2022-2023.
Marine heatwaves also take their toll on marine life: For example, due to fall-out from the 2019-2021 Pacific Northwest marine heatwave, [16] Bering Sea snow crab populations declined 84% between 2018 and 2022, a loss of 9.8 billion crabs.
Similarly, snow crabs likely will have an adverse effect on the native species of the Barents Sea. [6] Snow crabs are found in the ocean's shelf and upper slope, on sandy and muddy bottoms. [3] They are found at depths from 13 to 2,187 m (43 to 7,175 ft), but average is about 110 m (360 ft). [7]
A marine heat wave in 2018 and 2019 was especially deadly for the crabs. Warmer water caused the crabs’ metabolism to increase, but there wasn’t enough food to keep pace.