Is it because of climate change, poor management, over fishing?
Yes, all of the above, but this year they are blaming ocean survival for the poor sockeye returns and that can be a number of things. My unscientific, unresearched hunch wants to say climate change will have, if it has not arleady had, the biggest detrimental impact on all species of fish.
I am also concerned about climate change, or to be more specific, water temperature change of interior lakes that lie next to pine beetle infested forests. They will definitely get warmer as they clear timber. That can't be good for spawning streams or the lakes.