Fish Raise Their Voices to Shout Over Noise

“Every day, thousands of cars and trucks rumble across bridges all over the U.S. Their drivers probably don’t give much thought to the fish swimming in the rivers, lakes or bays below. But the fish notice them: They can hear those noisy engines passing overhead, and according to a new study, they are having to shout to communicate over the din.”

http://blogs.discovermagazine.com/d-brief/2014/04/18/fish-raise-their-voices-to-shout-over-noise/#.U1ZnXlVdVjY

 

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