Are there any differences in cooking techniques for Farm raised Salmon versus Wild Salmon?
You want to minimize the amount of fat you consume from farm-raised salmon. This means you should trim the fat from farm-raised salmon and avoid frying. Farm-raised salmon should be grilled, broiled, or baked, anything that burns away some of the fat. (Farm raised salmon is 52% fattier than wild caught salmon).

Why? Farm raised salmon have ridiculously high amounts of carcinogens known as polychlorinated biphenyls (PCBs) as compared to wild salmon, and many other foods for that matter. You can blame the feed they are given. These carcinogens are concentrated in the fat of the fish, which is why you want to minimize the fat intake. The levels of PCBs in farm-raised salmon can be 10 to 16 times higher than wild caught salmon, and up to 40 times the level found in other foods.

Experts recommend eating farm-raised salmon no more than once a month to minimize exposure.

Sources:


http://www.ewg.org/reports/farmedpcbs
http://www.healthcastle.com/wildsalmon-farmraisedsalmon.shtml
http://www.seattlepi.com/national/132952_fish30.html