Solution advanced by
In purse seine fisheries targeting pelagic species such as sardines, interactions with cetaceans can lead to bycatch injuries, and mortality of common dolphins. In addition, bottlenose dolphins can damage fishing gear, causing economic losses due to breakages and reduced fishing efficiency.
The MarineGuardian acoustic deterrent solution for purse seine fisheries aims to reduce dolphin interactions with purse seine fishing gear while protecting both marine wildlife and fishers’ livelihoods.
The challenge
Purse seine operations attract dolphins that follow schools of pelagic fish. These interactions can result in:
- Accidental captures and injuries of common dolphins
- Damage to nets caused by bottlenose dolphins, leading to costly repairs
The solution
This solution focuses on:
- Evaluating the performance of acoustic deterrent devices (pingers) in purse seine fisheries
- Testing net lighting to improve gear detectability and reduce dolphin interactions
Development and progress
During summer 2025, engagement with fisheries stakeholders was initiated, with two main fishers’ organisations contacted. Meetings are planned for November–December to jointly co-design experimental trials and monitoring protocols.
Expected impact
The acoustic deterrent device for purse seine fisheries contributes to:
- Reduce dolphin bycatch and injuries
- Lower gear damage and economic losses
- Improve coexistence between purse seine fisheries and cetaceans
