Snow Crab Study Quiz

What is the estimated number of snow crabs that disappeared from the eastern Bering Sea off the coast of Alaska between 2018 to 2021?

• 1 million

• 5 billion

• 10 billion

• 20 billion

What event is believed to have probably spurred a mass die-off of snow crabs, causing them to starve?

• Oil spill

• Overfishing

• Marine heat wave

• Pollution

When was the study published in Science that finds a marine heat wave probably caused a mass die-off of snow crabs?

• October 19, 2020

• October 19, 2021

• October 19, 2022

• October 19, 2023

How much annual revenue do snow crabs typically bring in for Alaskan fisheries?

• About $24 million

• About $150 million

• About $50 million

• About $100 million

What was the revenue from the 2021-2022 crabbing season compared to the typical annual revenue?

• It increased by $150 million

• It decreased by $126 million

• It remained the same

• It increased by $24 million

What is causing the future of fisheries and arctic marine ecosystems to be uncertain?

• Overfishing

• Pollution

• Marine heat waves becoming more common

• Decrease in seafood demand

What kind of water conditions do snow crabs (Chionoecetes opilio) thrive in?

• Warm and shallow waters

• Cold, arctic water with temperatures below 2° Celsius

• Tropical water temperatures

• Brackish water

What event in 2018 and 2019 contributed to the collapse of the snow crab population?

• An oil spill in the Bering Sea

• A marine heat wave

• Overfishing by commercial fisheries

• A sudden increase in sea ice

What two causes stood out for the sudden collapse of the snow crab population according to Szulwalski and colleagues?

• Overfishing and pollution

• Higher water temperatures and an initially dense crab population

• Acidification of the ocean and loss of habitat

• Predation by other species and diseases

What is the maximum water temperature snow crabs in laboratories can survive in?

• 10°C

• 12°C

• 15°C

• 8°C