By Lynda V. Mapes
The Seattle Times 

Researchers listen for orcas in Puget Sound to help their survival


April 20, 2022

ABOARD THE SOUNDGUARDIAN, Puget Sound (AP) — Over the side it goes with a splash: three ears tuned for the sounds of orcas, and the noise that threatens their survival.

In the deep, this trio of hydrophones rests on the sea bottom, recording the sounds of Washington's Puget Sound, including endangered southern resident orcas. The listening array, developed and deployed in March by SMRU Consulting, is attached to a buoy that marks its location, just about a mile offshore, north of Carkeek Park.

The equipment will be in place for three months, in a proof-of-concept experiment to determine i...

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