Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype associated with pyrethroid resistance

Abstract

Atlantic salmon Salmo salar aquaculture has developed into a significant industry in several countries since its start in the early 1970s. However, the rapid expansion of this industry has not been without sev-eral challenges linked with environmental sustainability Of these challenges, farmed escapees causing genetic interactions with wild conspecifics