The GSI recognize that biosecurity issues are a huge challenge for the industry, but with the correct management strategies in place the industry can help ensure healthy fish stocks.
We have prioritized our efforts on the issue of sea lice.
Sea lice represent a significant challenge for the farmed salmon industry. Sea lice are a naturally occurring parasite found throughout the world’s oceans and on many species of fish, and have a detrimental effect on the health and welfare of the infected fish, and can reduce productivity of the farm.
There are two forms of sea lice which are a concern to the salmon farming industry:Lepeophteirus salmonis, which affects Norway and British Columbia, andCaligus rogercresseyiwhich affects farms in Chile.
The farmed salmon industry has made considerable efforts in recent years to reduce the levels of sea lice, and is continuing to work on reducing numbers year on year. Despite declining numbers, as the industry expands the pressure of sea lice remains a challenge that must be monitored and controlled.
Through a programme of industry cooperation and knowledge sharing, the GSI has developed a list of best practices that it will work to implement across all GSI farms. Through wider application and adherence to these best practices, the GSI seeks to make significant improvements in sea lice management.
GSI Sea Lice Best Practices
- Minimize adult female lice levels
- Utilize lice thresholds and treatment trigger points
- Increase industry cooperation on:
- Zone management strategies
- Synchronized treatments
- Coordinated fallow and production cycles
- Single generation production areas
- Medicinal control
- Implement medicinal product rotation
- Use resistance bioassays for treatment decision making
- Timing of site treatments
- Use of peroxide with full tarpaulins
- Optimal dispensing and distribution of medicines
- Dispense treatments in wellboats
- Non-medicinal control
- Integrated control solutions
- Use of wrasse and cleanerfish where appropriate