Bear
I absolutely disagree with what you posted there in relation to wild Alaskan (or west coast) salmon. The studies are based on farmed Atlantic salmon from Scotland and Norway which have been fed PCBs in their feed. It absolutely does not apply to Copper River reds or other Alaska salmon, period. The rates run about 8x as high as EPA standards, but lower than the FDA allows???
That tissue under the skin along the lateral line is NOT fatty tissue it is simply muscle that is used far more than the rest of the fish's muscle. There are almost no measurable PCBs in AK salmon and few in west coast farmed salmon. (Much as it pains me to admit that as the farms will be the death of our salmon runs) It does not have any particular fat storage going on, as a matter of fact it is lightly lower in fat than the rest of the flesh.
art