Pavlov's.....fish

[ZoddyZod]

Just spotted this on BBC News, though it was interesting......

Training fish with sound

 

[Haych]

i didnt think fish could hear, i thought they worked on vibrations and feel

 

[ZoddyZod]

i didnt think fish could hear, i thought they worked on vibrations and feel

indeed, so it's the bass in the sound that is providing the stimulus.

 

[Haych]

but technically its not listening, its feeling???!

 

[loraxchick]

even our own hearing is based on pressure changes. so makes sense a fish can "hear" even if they dont have ears...thats what the lateral line is for. kinda the same, works on a similar principle as our ears detecting pressure waves...and water conducts sound tens of times faster than air. of course im over simplifying it but...
pretty cool!
cheers

 

[Bignose]

and water conducts sound tens of times faster than air.

"tens of times" is bit of an overexaggeration. The speed of sound in air at sea pressure is 343 m/s, the speed of sound in water at 20* C is 1484 m/s -- about 4.3 times faster.