"What impacts does salmon farming have on wild salmon and sea trout?"

"Factory salmon farming spreads disease and parasites. Cramming up to half a million farmed salmon on a farm (with 50,000 in a single cage) is a recipe for disaster in terms of the spread of infectious diseases and parasitic infestation..."

Scotland is facing the problem of massive salmon farming since longer time than Sweden. This site of Bruce Sandison gives lot of informations and a real portrait of the scenarios the coast communities and economies are living and gives in a clear way a lot of answers to the questions we're approaching in the High Coast.
http://www.salmonfarmmonitor.org/questions.shtml