I'm not so certain that politically motivated studies funded by Ottawa or secondarily by educational institutions financed by governments are all that factual.
I spent my formative years in the 50's and 60's commercial fishing
for salmon up and down the BC coast and recall
many of the old timers watching the runs of sockeye, coho and springs (kings) beginning to dwindle year after year.
It was a pretty simple explaination... the white fishermen were bound by law to stay outside the fishing
boundaries across inlets where the salmon schooled up to spawn up the rivers. There was no such prohibition of native fishermen who routinely would set gill nets and seine nets across the inlets far up stream towards the mouth of the rivers. They would clean out up to 100% of the salmon runs and sell their catch to cash buyers. Four years later, the salmon run for that river disapeared.
Years later my son worked in both a Government Biological Station and on a commercial
salmon farm in the Gulf Islands. He confirmed what I had known as the cause for the drastic reduction in salmon run quantity as well as the quality of wild salmon.
Political correctness apparently played a major role in the elimination of commercially caught salmon on the BC coast IMO. Capt Phil