Use of 'pingers' in fishing nets reduces accidental catch of porpoises

Use of 'pingers' in fishing nets reduces accidental catch of porpoises

By Don Jacobson

Source: UPI

5/13/2020

Accidental catches of porpoises in fishing nets can be significantly reduced -- with no adverse behavioral consequences -- by the use of noise-emitting "pingers" off coastal areas, a British study has found.

With tens of thousands of small cetaceans such as dolphins being caught up in commercial fishing nets worldwide each year, scientists are sounding the alarm over their declining numbers.

But a study published Wednesday by the University of Exeter and Cornwall Wildlife Trust suggests technology could help alleviate the problem.

Researches found the use of pingers embedded in fishing nets resulted in a 37 percent reduction of harbor porpoise "bycatch" in an eight-month trial off Britain's Cornish coast.

It also demonstrated the acoustic alarms didn't permanently change their behavior. The animals immediately returned to their feeding grounds once the devices were turned off, the study's authors said.

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