It is difficult to find real studies on GM salmon and related issues, here is a start. Most of the articles were on the activities and effects on the salmon, almost none were found for human or animal consumption health effects.
Links to research articles on GM salmon:
Large Scale escapes Farmed fish; AquaBounty promises that the salmon will be contained. They grow the fish in Canada and the Canadians are concerned. Why grow the eggs in Canada, ship the eggs to Panama and then ship the food to America? An article on how the farmed fish escape into the wild.
Antifreeze protein gene in Atlantic salmon: Production of stable lines of freeze-resistant salmon and other species would greatly facilitate development of sea-pen aquaculture in many regions. We successfully introduced winter flounder AFP genes intoAtlantic salmon.
Growth enhanced transgenetic salmon can be inferior swimmers.
Invasion of transgenes from salmon or other genetically modified organisms into natural environments:
Genetically modified salmon a full impact assessment A review of the impact that the process of regulatory systems ignore.