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Submerging Atlantic salmon cages may do more harm than good

Some salmon producers may keep their cages fully submerged to keep sea lice at the bay, but results from a recent trial suggest that while this reduces lice infestations, it is detrimental to salmon welfare and production goals.

Atlantic salmon producers may want to rethink plans to submerge sea cages as a lice prevention strategy, according to results from a new study published in the journal Aquaculture. In this trial, researchers fit three 1,729 m³ net pens with air domes and stocked them with approximately 6,000 salmon smolts. The researchers submerged the cages 15 m below the surface and tracked the salmon for a year, to obtain the results by measuring their growth rates, swimming behaviour, welfare parameters and sea lice levels.

Click to read more: https://thefishsite.com/articles/submerging-atlantic-salmon-cages-may-do-more-harm-than-good

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