Salmon are in trouble in British Columbia and elsewhere. Is it salmon farming? Pollock trawling? Or what?
I'm not up on all the data, but there are signs of salmon problems from California to Alaska. Not just near salmon farms, and not just where trawlers catch pollock.
The problem has hit sockeye from the Fraser River. But it's also hit salmon from British Columbia all the way to California. Salmon farming has been blamed, but there aren't salmon farms to cause problems all the way to California.
The kings are in trouble in the Yukon River, and pollock trawlers have gotten some heat, but there are disease problems linked to warmer temperatures also causing problems for these fish.
Oh...and there are seabird problems in some of the same areas, British Columbia and the US west coast.
Not sure what to think about all this, but I'm going to focus my worrying on the larger scale issues like ocean warming, either cyclical or CO2 driven.