Pinger
Pingers are acoustic signaling devices that are used in fishing to keep porpoises and other small whales away from the nets.
The whales get caught in the fishing nets as bycatch and suffocate in them. You can prevent this by pinging. It is seen as disadvantageous that the noise generated by humans is increased in the seas, and there can also be a habituation effect on whales.
Different types of pingers were tested, including those that emit variable sounds to avoid the habituation effect and interactive pingers that only send signals when whales are nearby.
Web links
- Tim Bartels: Deadly traps for the bottlenose dolphins. In: Berliner Zeitung . June 12, 2003, accessed September 20, 2010 .
- Investigation and assessment of possible exposure to pingers (acoustic deterrents) on the hearing of porpoises in EU fisheries. fisa online, accessed September 20, 2010 .
- Press release on the EU conference on maritime policy in Bremen. Retrieved September 20, 2010 .
- The Baltic harbor porpoise in the death net. Environmental News, accessed September 20, 2010 .
Individual evidence
- ↑ DER SPIEGEL: Hundreds of dolphins die on France's Atlantic coast - criticism of fishermen - DER SPIEGEL - science. Retrieved February 26, 2020 .