Natural resource management has been strongly siloed across the board for a long time. Development doesn't hurt fish. Making lakes multi-species is fine. Harvesting everything at MSY doesn't affect anything else.
I believe, based on information my colleagues share, that the whole damn Pacific ecosystem (terrestrial and aquatic) is setting up to collapse. The information has been there for decades; it seems that we have reached some sort of tipping point that is being pushed by climate change. But, without CC we would still be facing issues.
For too long, for example, the ocean was a "Back Box". Poor returns-bad conditions. Good returns-good conditions. But never seemed to actually try to determine what those conditions were. Same with food chains. We kept harvesting all levels, and mutual declines kept it all in some sort of balance.
Then, we protected some apex predators, they increased, and (oh my gawd) they ate more.
While it was pretty well established that the declines in adult salmon size were (30s-90s) fishery related there were a couple of exceptions. It was rather well recognized that the bigger the pink run (at least Fraser) the smaller the individual fish. Even then, we had the information that food out there wasn't limitless.