I gotta wonder what % of these fish are bonked in the Vedder because anglers see a clipped adipose and think coho. It is possible to clip another fin . . .
I am not an expert on this stock but I think stuff like that impact but by no means the smoking gun. Off course taking the last few sockeye that make it back does have huge impact.
Think I read somewhere that Wild Cultus lake sockeye survival from the Fry to smolt stage is like 2%. Then you have to think that at best the ocean survival of those smolts is like 4%. So you start off with 10,000 fry, 200 smolts leave the lake, 8 sockeye return to the river. The exploitation rate they are trying to get down to 20%. so 2 die to fishing exploitation and your left with 6 fish left at the cultus lake fence.
The thing that pains me is this stock from what I have read is genetically very distinct. The sockeye can be in like 22C water and show almost no signs of distress.
For this fish to recover its like, Remove all the development from around the lake, Stop all fishing for sockeye in the ocean and river during there migration, remove invasive plants from the lake, remove predators from the lake.
The laundry list is so unattainable for managers that they are like okay lets use hatchery to try to keep them alive as long as possible and hope that ocean survival rates return to like 10%.
I could be way off but it that's my interpretation of the whole thing.