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Scots announce lowest sea lice levels for six years

26 March 2019, at 11:43am

The Scottish Salmon Producers Organisation (SSPO) has announced that sea lice levels in the industry are at their lowest levels for six years, despite 47 percent drop in spending on medicinal sea lice treatments.

Speaking at the , near Edinburgh, Julie Hesketh-Laird, chief executive, told delegates the sector’s spend on medicinal treatments had gone down by 47 percent in the last three years.

Julie Hesketh-Laird, chief executive of the Scottish Salmon Producers Organisation
Julie Hesketh-Laird, chief executive of the Scottish Salmon Producers Organisation

This change in approach – shifting from medicines to a range of other measures, including cleaner fish and fresh water treatments - contributed to the Scottish salmon sector achieving its lowest average sea lice levels for six years.

According to new figures released today by the SSPO, sea lice averages on Scottish farms fell in 2018 to their level since 2013. In 2013 sea lice averages were 0.54*. This went down to 0.46* in 2018.

LOLS10在线直播下注Over the past three years, a series of new non-medicinal methods have successfully driven down sea lice. Investment in cleaner fish like wrasse and lumpfish which pick the lice off the salmon in the pens and technologies like the hydrolicer and thermolicer which use water and temperature to remove lice has risen to around £53.5 million over the past three years. During the same period spend on traditional medicines declined by 47 percent to £9.7 million.

Figures published today by the Scottish Salmon Producers Organisation also show farm-by farm results for salmon survival. The average monthly salmon survival on farms last year was 99 percent.

Today’s data release marks the start of a new SSPO-led reporting schedule for sea lice and survival figures.

Companies are now reporting this data after either one month or two, not three, as was the case previously.

Julie Hesketh-Laird said:

“Fish health and welfare is at the very heart of successful salmon farming. In spite of changing and challenging marine conditions, salmon farmers are working successfully to innovate, collaborate, take action and manage fish health and welfare.

“Scotland is leading the world in the reporting of salmon survival data and in the sustained management of sea lice. This demonstrates our willingness to be open about our operations and standards of fish health and welfare.

“The sector’s reporting of its performance is above and beyond the many other levels of regulation and voluntary data already shared. From today, we will be publishing more current farm-by-farm sea lice and survival data, moving from three-month reporting schedule we have worked to in the past.

“This enhanced level of transparency should reinforce trust in this important Scottish farming sector.”

The salmon farming sector is a key player in the collaborative initiative with the Scottish Government to improve salmon health and welfare.


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It is vital that fish farm operatives who are responsible for farmed fish are trained in their health and welfare. This will help to ensure that fish are free from disease and suffering whilst at the same time promote good productivity and comply with legislation.

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* Lice levels reporting refer to adult females.