In this study, we assessed the effects of a Banana Pinger (Fishtek Marine Limited) on harbour porpoises in Cornwall between August 2012 and March 2013. Bycatch is recognized as a persistent problem in waters around Cornwall, United Kingdom, where several cetacean species are resident, with harbour porpoises ( Phocoena phocoena) being the most-commonly sighted. Although pingers have been shown to be an effective measure for numerous species, there are some concerns about their long-term use. While numerous bycatch mitigation strategies exist, acoustic alarms, or pingers, are the most widely adopted strategy for small cetaceans.

6Cornwall Wildlife Trust, Truro, Cornwall, United Kingdomīycatch is a significant cause of population declines of marine megafauna globally.

5Chelonia Limited, Mousehole, Cornwall, United Kingdom.

4Independent Statistical Consultant, Forston, Dorchester, United Kingdom.

3Whale and Dolphin Conservation, Chippenham, United Kingdom.

2Fishtek Marine, Dartington, Devon, United Kingdom.

1Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn Campus, Penryn, Cornwall, United Kingdom.

Doherty 1*†, Sarah Dolman 3, Robert Enever 2, Allan Reese 4, Nicholas Tregenza 5, Ruth Williams 6 and Brendan J.

Difference between pinger and pinger ex