Most of the Pink returns up north were poor this year. Another year of no abundance!
Who knows? It's about the quality of information provided.
Remember RIP Rivers Inlet sockeye? Latest info I found was 300+ went through the Whonnock River in 2014. There were previous years of 100k+. Hardly RIP.
Wiped out by over fishing fishing? I found no peer reviewed studies that report that. They suspect poor ocean survival possibly right in the inlet itself where increased glacial runoff has changed the timing of the phyto-plankton bloom.
Pink returns were bad, Chum returns were bad, Chinook returns have been up or down depending on the system and Coho returns have seemed pretty positive. Lots of reports of coho stuff with crab larva this year.
Generally tho down compared to previous years
Rivers inlet sockeye went from a harvest of couple million down to nothing, Tho your right just like with Thompson steelhead they aren't likely to go extinct instead were likely to see the numbers remain at extremely low levels.
Depensation, Critical Mass, Allee effect is a thing with salmon populations. Most times it seems like it is a mystery why the populations crash. Tho I do know one thing is no one wants to point the finger at them selves and say that what they are doing is a cause.
This is a pretty good article that I thought summed things up nicely.
A Dead Fish is a Dead Fish, Right?
https://www.salmonandsteelheadjournal.com/a-dead-fish-is-a-dead-fish-right/?fbclid=IwAR2DN6R4YWBiGFdo_D5XUNZxmtKkuFyqiceB4iW71hAqw_SZRPHxv9ayfAE