A study carried out by researchers at Stirling University has shown that levels of omega-3 in farmed salmon have fallen significantly in the past five years. Levels have, in fact, halved over that period.
The industry, already under pressure due to such issues as antibiotics and environmental pollution, says it is exploring ways around the problem. The source of the omega-3 decline appears to be the pellets fed to the farmed fish.
Read the story on the BBC News website here.