Warming oceans sees fish species moving north: study

The transcript discusses the impact of rising temperatures on marine life. Traditional cold water fish catches in southern Europe are declining. A one-degree temperature increase could reduce farmed mussel production by 50%, and a four-degree rise could lead to a 70% decrease. North Sea species like cod and sole are swimming deeper, while squid populations are growing. The bib fish has expanded its range northward by 342 kilometers over two decades due to warmer temperatures.

What is the expected impact on traditional cold water fish catches in southern Europe due to rising temperatures?

• Fish catches will remain stable

• Decline in fish catches

• Increase in fish catches

• No change in fish catches

How much is the production of some farmed mussel species expected to fall with a one-degree temperature increase?

• 70%

• 30%

• 10%

• 50%

What is the predicted decline in farmed mussel production with a four-degree temperature rise?

• 70%

• 60%

• 40%

• 20%

How much deeper are common North Sea species like cod and sole swimming each decade?

• 4.5 meters

• 3.5 meters

• 5.5 meters

• 2.5 meters

By how many kilometers has the bib extended its range northwards in the past two decades?

• 242 kilometers

• 142 kilometers

• 442 kilometers

• 342 kilometers