Salmon runs are vital to species strength
Diseases spreading among wild salmon are caused from the transporting of any one salmon to spawning grounds; the compromise of nature’s design and intent spells disaster.
The salmon run is what separates the strong from the weak; the rivers are vital and very important for strong, healthy fish. Without the run, all salmon will perish in time. Weak salmon will never finish the run to the spawning grounds, but they all must journey through it. The ones that don’t make it become food for the wolves of the sea, and so on.
A healthy fish doesn’t need our help to survive, but without their river run they will doe, as we see now.
The main issue here is the salmon river run; rivers must flow for healthy salmon to grow. This is a fact of nature.