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Din among the Orcas: Are whale watchers making too much noise?

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12:45pm, April 28, 2004

Whale-watcher boats may be making so much noise that killer whales off the coast of Washington have to change their calls to communicate over the racket.

Recordings made during the past 3 years, after a boom in whale watching in Washington State, show that killer whales lengthen a characteristic call by about 15 percent when boats cluster around them, reports Andrew D. Foote of the University of Durham in England.

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