Sharp rise reported in Scots fish lice chemical (BBC)
The level of chemicals used by fish farmers to treat sea lice infestations has risen dramatically, a BBC Scotland investigation has learned.
Scottish government figures showed that over the past five years, the industry used a broader range of chemicals and more of them.
Campaigners claim the figures are evidence the natural parasite is becoming resistant to the treatments.
Fish lice have been blamed for damaging salmon and sea trout stocks. Read more