The FDA’s research:
http://www.fda.gov/downloads/AdvisoryCommittees/CommitteesMeetingMaterials
/VeterinaryMedicineAdvisoryCommittee/UCM224762.pdf
The company that has patented these GMO salmon:
http://aquabounty.com/technology/faq-297.aspx
The only real solid, outside scientific paper I could find on the topic:
6B4D89A1E0FA28F2932A1342D90D