I did some more looking up and found the opinions all over the map. I noticed that the spokesmen for each side seem to put down the other.
Wording is important. methylmercury is the toxin . It appeared that "farmed salmon" had some higher levels of toxins but wild salmon is high in methylemercuury . Enough so, to generate an advisory for pregnant women.
ANY riverine fish , unless the entry waters are pristine (nd that aint happening with all the old gold facilities that had used mercury in the west, and many PCB outfalls in the east) any fish in contact get saturated quickly.
The advisory for striped bass from the Hudson still remains and the fish are as tainted as they ever were because , even though the PCBs are being clened up, there is so much in the bottom sediments that "washes out" and the fish take it up in their food.
I guess the point is, no fish is really safe. If you prefer wild salmon be advised that the EPA does the studying and Monterey Bay does receive funding from the fishing industry. Also, in Canada and Maine, the salmon farming groups also sponsor research to show that their fish is best.
I eat a lot of salmon from farmed sources. Its cheaper and I am not as discerning about some flavor differences. I know the color is enhanced and the Omega 3 levels are also enhanced by feed.
The whole "Wild salmon is finer" crap was started by the Columbia Fisgermen marketing arm as a shot across the bow to stop the inroads being made by the modern farmed fish industry.
Who do you believe? Id try to search out the raw data from the state fish and wildlife and AG depts. rather than web sites from groups that are clearly "market driven".
Its hard to trust anybody on the web anymore. Its such a damn marketing tool that you have to be really suspicious .