The Pacific salmon fisheries in North America are generally well managed. Overfishing isn't really a huge threat as a result. In fact you could argue that commercial wild salmon fishing is ecologically beneficial insofar as it brings resources and monitoring to the salmon populations and an economic incentive to keep them healthy.

When it comes to wild salmon (which are definitely under some threat) the far bigger issues are believed to be related to habitat. Dams blocking their transit and high water temperatures are two prominent issues.