PORTSMOUTH, N.H. — A device designed to warn harbor porpoises and other marine mammals to steer clear of gillnets has proved effective during a two-month experiment, test sponsors say. The device, known as a pinger, emits a gentle but insistent beep audible to the sea… Read More
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Gillnet `pingers’ favored as way to spare porpoises
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Gillnet `pingers’ favored as way to spare porpoises