Source AP ©

Manmade underwater sounds deafen fish

Increasing manmade sounds underwater make fish deaf.

Michael Smith, an assistant biology professor at Western Kentucky University, cited U.S. Navy sonar and oceanic shipping as possible noise pollution for fish, which use sound to find their way around and listen for predators.

His study will expose locally bought rainbow trout, silver perch and goldfish to various sound combinations at a special sound booth.

Then tests will see whether the fish have hearing loss. The fish's brain waves will be recorded through electrodes while the fish listen to tones.

"We give a series of pure tones to fish through an underwater speaker, and we increase the intensity of the tones until we detect brain-wave activity," Smith said.

Comments
Russians lose faith in their future, get ready for worse
Macron challenges Trump. French independence and croissants at stake
Russia unveils nuclear-powered interstellar spaceship
Russia unveils nuclear-powered interstellar spaceship
Moving inexorably towards war
Russians lose faith in their future, get ready for worse
Sanctions do not stop foreign countries from buying Russia's S-400 systems
Sanctions do not stop foreign countries from buying Russia's S-400 systems
Russians lose faith in their future, get ready for worse
Russians lose faith in their future, get ready for worse
Putin dislikes the idea of US army bases coming to Kuril Islands
NATO to build prestrike staging base in Georgia
NATO to build prestrike staging base in Georgia
The difference between Polish and Ukrainian nationalism is plain to see
Sanctions do not stop foreign countries from buying Russia's S-400 systems
Sanctions do not stop foreign countries from buying Russia's S-400 systems
Russia rips its economy apart with help from the West
Hillary in 2020?
NATO to build prestrike staging base in Georgia
Russia close to recognising Donetsk and Luhansk republics after Donbass elections
World honours bravery and courage of Russian pilot who killed himself in Syria