Euryhaline fish

Question 1

What is the main characteristic of euryhaline fish?

Answer 1

• broad salinity tolerance (SW to FW)

Question 2

What are 3 examples of euryhaline fish?

Answer 2

• salmon
• eels
• lamprey

Question 3

What does it mean to be catadromous? give an example

Answer 3

• migrate down rivers as adults to spawn in sea and juveniles migrate back to freshwater to grow (ex. eels)

Question 4

What does it mean to be anadromous? give an example

Answer 4

• migrate UP rivers as adults to spawn, juveniles move downstream to grow (ex. salmon)

Question 5

Freshwater fish use ____ osmoregulation

Answer 5

• hyper

Question 6

Seawater fish use ____ osmoregulation

Answer 6

hypo

Question 7

Why did ancestral marine jawless fish migrate between fresh and salt water?

Answer 7

• FW provided refuge for larvae (few predators) but was nutrient poor = SW