Understanding Sea Lamprey and Their Impact

What was one of the main reasons for the introduction of invasive species like the sea lamprey into the Great Lakes?

• Natural migration

• Opening of the Erie Canal and St. Lawrence Seaway

• Climate change

• Overfishing

How do sea lampreys reproduce in rivers?

• By burrowing into the riverbank

• By attaching to large fish

• By laying eggs on the riverbed

• By building nests with rocks

What is the primary impact of sea lampreys on fish populations in the Great Lakes?

• They provide food for larger predators

• They help in cleaning the lakes

• They significantly reduce fish populations by feeding on them

• They improve fish health by removing parasites

In their native habitat, what role do sea lampreys play?

• They are scavengers

• They are primary producers

• They are harmless parasites

• They are top predators

Why are sea lampreys more harmful in the Great Lakes compared to their native habitat?

• They are larger in the Great Lakes

• They have no natural predators in the Great Lakes

• They reproduce more quickly in the Great Lakes

• Their hosts in the Great Lakes are smaller and more vulnerable

What unique feature do sea lampreys use to feed on fish?

• Sharp claws

• A rasping tongue with teeth

• A strong tail

• A venomous bite

How much of its body weight can a sea lamprey consume in blood in a single day?

• 20-30%

• 10-20%

• 30-40%

• 5-10%

Which fish species is most commonly affected by sea lamprey attacks?

• Bass

• Perch

• Catfish

• Lake trout

What is the analogy used to describe the impact of sea lampreys on fish?

• A tick on a dog

• A vampire sucking blood

• A leech on a frog

• A mosquito bite

Do sea lampreys pose a threat to humans?

• Yes, they can attack humans

• No, they do not feed on humans

• Yes, they can transmit diseases

• No, they are too small to harm humans