Acousticolateralis system and behaviour Flashcards
1
Q
What are the 5 main uses of the acousticolateralis system?
A
- food detection
- direction and obstacle avoidance
- equilibrium and balance
- orientation to water currents
- communication via auditory cues
2
Q
How do sharks, skates and rays detect food?
A
- sensitivity to low frequency vibrations and irregularly pulsed sounds (crippled prey)
3
Q
How do fish sense direction and avoid obstacles? (3)
A
- head movements push water in front
- displaced water by other objects moves over neuromasts
- avoidance of clear aquarium walls
4
Q
How do fish maintain equilibrium and balance?
A
- constant movement of pectoral fins
5
Q
What is shoaling?
A
- grouped together (social)
6
Q
How do fish shoal? (2)
A
- guided by vision
- lateral line maintains spacing
7
Q
Why do fish shoal? (4)
A
- hydrodynamic efficiency (minimized drag)
- efficient food finding (watch neighbors)
- reproductive success (lots of mates)
- reduced risk of predation (more chance neighbor is killed)
