We agree ocean survivals are the major cause of the declines of these early run (Nov - Jan) fish, but there is not much we can do about ocean productivity. What we have in our power to do, however, is to allow more wild fish to spawn. Cutting back on brood stock numbers, closing the river above Tamihi Creek on April 1 to allow less harrassment and increase spawning, are 2 ways to do this.
I'm not aware of any DNA studies on Chilliwack River steelhead; hell, we don't even know where most of them spawn.
Avid angler, you seem to be one of the few who seems to care about the future of these fish and your ideas are needed. Lets hear some more..