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Lower number of sea lice

The level of sea lice have been low this spring and in many places the numbers have been lower than the same period last year.

"Low water temperatures, well coordinated delousing and good supervision is why our situation has been so good," says Kristina Landsverk, supervising director of the FSA.

Monitoring shows that sea lice pressure on wild salmonids has been low and that the majority of salmon smolts probably came out with little lice.

During the period January to June 2013, sealice numbers were lower than in recent years. Across the country, the average level remained below the maximum threshold of 0.5 adult females, ie the limit of lice that may be on farmed fish at a facility.

"The low lice levels is primarily due to low water temperatures. Temperatures have been up to two degrees below normal and low water temperatures mean salmon lice reproduce more slowly," says Ms Landsverk.

The sea lice infection of wild salmon is also lower this year than in previous years.

So far, the results indicate that 2013 is a year of very low infection pressure along parts of West and Central Norway in the spring and early summer, and both sea trout smolt and salmon smolts have been low infection during smolt migration.

 

You can read more on the report here 

(Source: The Fish Site)

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