We are pleased to announce the successful completion of our research investigating the use of 222 nm ultraviolet-C (UVC) radiation for the control of sea lice in salmon aquaculture.

Research Outcomes Exceed Expectations:

• High efficacy against sea lice: UVC radiation at 222 nm demonstrated remarkable efficacy in suppressing the reproductive capabilities of sea lice. A significant reduction in the number of viable lice larvae was observed, underscoring the potential of this method for effective parasite population management.
• Salmon safety assured: In contrast to previous studies utilizing 254 nm UVC, the application of 222 nm UVC did not result in any discernible adverse effects on the health and welfare of the salmon. No evidence of skin or eye damage, nor any behavioral indications of discomfort, were detected in the treated fish.

Implications for Aquaculture are Profound:

• An effective and safe parasite control method: 222 nm UVC radiation presents a promising new standard for sea lice control, offering a solution that is both efficacious and safe for the fish.

Enhanced fish welfare and environmental sustainability: Reducing parasite burden contributes to improved salmon health and welfare, while also mitigating the risk of lice transmission to wild populations, thus promoting environmental sustainability.

Future Directions:

• Optimization of irradiation parameters: Further research will be conducted to determine the optimal dosage and irradiation regimens to maximize efficacy while ensuring the continued safety of the fish.
• Implementation in production settings: We will actively pursue the development and implementation of practical solutions for applying 222 nm UVC technology in salmon farms, making this method readily available for widespread adoption within the industry.

We are confident that the findings of our study pave the way for novel approaches to sea lice control and contribute to the advancement of sustainable and responsible aquaculture practices.