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Tracking the World’s Largest Salmon With Sonar

  Onishibetsu, Japan – I’ve learned to be patient.  A skill honed as an obsessed fly fisherman years ago. Lately, though, I don’t use a rod and reel to stalk fish.  The challenge of “catching” them with sonar I find much more gratifying.  Consider it the most benign form of “catch and release.” I’m in a…

Ultrasound Ocean Noises Pose Risk to Marine Life

by Michael Stocker Noise pollution has now become one of the common themes of human-generated impacts on the ocean. Shipping noise, military sonar, and seismic airgun surveys are increasingly becoming part of the public discussion in marine conservation. These noises are easy for us to understand; they are loud, ubiquitous, and they are all in…

Moths Vibrate Genitals to Avoid Bats

Moths vibrate their genitals to jam bat sonar, making them invisible to the predators, a new study says.