VOICED: A Great Threat in the Great Lakes

The video discusses the invasion of Asian carp in the Illinois River, posing a significant threat to the Great Lakes ecosystem and economy. These fish, introduced in the 1970s, have spread rapidly, threatening the fishing industry. Efforts to prevent their spread include a costly electric barrier. Despite these measures, the carp's presence and behavior give them an advantage in the ecosystem.

What is the primary threat posed by the Asian carp to the Great Lakes?

• They introduce new diseases to the ecosystem.

• They increase the water temperature.

• They consume large amounts of food, leaving little for native fish.

• They cause water pollution.

How did Asian carp initially enter the waterways of the United States?

• They were released by fishermen.

• They escaped from catfish farms during floods.

• They were introduced for sport fishing.

• They migrated naturally from Asia.

What method is being used to prevent Asian carp from entering Lake Michigan?

• Electric barriers

• Sound waves

• Physical nets

• Chemical barriers

What happens to the Asian carp when they encounter the electric barrier?

• They become aggressive.

• They turn around and swim back.

• They swim faster towards the barrier.

• They jump out of the water.

Which type of Asian carp is known for jumping out of the water?

• Black carp

• Grass carp

• Silver carp

• Bighead carp