Fish communities

Question 1

diadromous

Answer 1

migration between freshwater and the sea

Question 2

anadromous

Answer 2

spawn in freshwater and migrates to the sea

Question 3

catadromous

Answer 3

spawn in the sea and migrates to freshwater

Question 4

amphidromous

Answer 4

spawn in freshwater, then embryos drift to the sea, becomes part of plankton, migrates back to freshwater eventually

Question 5

Atlantic Salmon lifecycle

Answer 5

eggs–> alvin –> fry –> parr –> smolt –> adult

Question 6

iteroparous

Answer 6

spawn more than once (Atlantic salmon)

Question 7

semelparous

Answer 7

spawn once then die (Pacific salmon)

Question 8

operculum

Answer 8

gill covering

Question 9

lateral line

Answer 9

sensory information

Question 10

IBI

Answer 10

index of biological integrity. developed for each fish species. Tells tolerance to pollution, trophic level, thermal niche. Highest score is 45, means the healthiest stream.

Question 11

Threats to salmon

Answer 11

predation, pollution, climate change, connectivity, hatchery programs