Animal bioacoustics in the marine world
Do fish talk?
Animal bioacoustics takes in a lot of territory. Every animal makes some form of sound –
Marine bioacoustics itself is a wide ranging field. The most work has centered around marine mammals –
It’s estimated that perhaps half of all fish species make sound. These are called soniferous fish. I know fishermen who swear ‘the fish were laughing at us’. But, researchers around the world are just beginning to unravel the mysteries of fish sounds.
Using hydrophones (underwater microphones), researchers ‘hunt’ for sounds –
Tracking fish by their sounds lets researchers identify spawning sites. They have found that each species of fish makes different sounds. So, by listening to the sounds you can find a spawning area, identify which fish are there and even estimate their number.
If it turns out (as is likely) that fish return to the same spawning spots year after year, these areas can be protected by law. The sounds fish make vary by species.
It seems easy, but it’s not. You have to identify which sounds are made by what fish. In any body of water that can be difficult. The sea, or even a pond, can be a very noise place –
You will hear ‘grunts’, ‘drums’, ‘doorknocks’, ‘heartbeats’ , ‘burps’, ‘croaks’, ‘crackles’, ‘chattering’, ‘purring’, ‘clucking’ and even a ‘foghorn’!
For samples of these and other sounds, check out our LISTEN page.