Click, click and away? A new international research project investigates long-term benefits and impacts by using acoustic warning devices for harbour porpoises

In order to reduce bycatch of harbour porpoises in gillnets, fishermen have been using so-called Porpoise ALerting Devices (PALs) voluntarily off the coast of Schleswig-Holstein since 2017. In an international research project, scientists are now and until the end of 2024 examining the effectiveness of the bycatch reduction and the long-term effects of the warning devices.

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