Migration Flashcards
1
Q
Define epitoky.
A
Behavioural, morphological and physiological changes during it’s sexual maturation.
2
Q
Give an example of migratory adaptions.
A
- Ragworm
- Only males swarm
- Spawning induced by temperature rise, light intensity, lunar and tidal cycle
- Surface waters to release sperm.
3
Q
What causes zooplankton vertical Migration?
A
- Light intensity
- Temperture.
4
Q
Why do zooplankton vertically migrate?
A
- Predator avoidance
- Avoiding UV damage
- Metabolic advantage: saves energy.
5
Q
Define amphidromous.
A
Fish who migrate from freshwater to Sea, but not to breed.
6
Q
Define potamodromous.
A
Migrations wholly occur in freshwater.
7
Q
Define oceanodromous.
A
Migration wholly occurs in sea.
8
Q
How do turtles navigate during migration?
A
- Ability to detect magnetic fields
- Chemical cues
- smell?
