Pingers on gill nets can reduce bycatch of harbor porpoises. If harbor porpoises habituate to
pingers, the effect may be reduced or lost. Two captive harbor porpoises were exposed to …

The use of acoustic alarms (pingers) has been mandated in several gill net fisheries around
the world. Even though pingers have shown to reduce the incidental catch there are still …

High numbers of harbor porpoises (Phocoena phocoena) end up as bycatch in gillnets
every year. Acoustic alarms (pingers) have been demonstrated to be an efficient mitigation …

In an attempt to test the effectiveness of sounds in deterring harbor porpoises from nets and
reducing porpoise bycatch in gill net fisheries, two harbor porpoises, kept in a large floating …

A measure proven successful in mitigating harbor porpoise bycatch, is the use of acoustic
deterrents, ie, pingers. However, most pingers are audible to seals. This may lead to seals …

Large bycatches of harbour porpoises (Phocoena phocoena) occur in gillnet fisheries
throughout the Northern Hemisphere. Several mitigation measures, including acoustic …

The high under-water sound pressure levels (SPLs) produced during pile driving to build
offshore wind turbines may affect harbor porpoises. To estimate the discomfort threshold of …

Field tests suggest that high-density nets can reduce harbor porpoise Phocoena phocoena
by-catch in demersal gillnet fisheries. However, it is not clear whether acoustic reflectivity or …

Harbour porpoises Phocoena phocoena are unintentionally caught in gillnets. Although the
effectiveness of by-catch mitigation measures has been evaluated many times, only a few …

Harbour porpoise bycatch may be reduced by deterring porpoises from nets acoustically. In
this study, two harbour porpoises were subjected to three acoustic alarms. The effect of each …