One problem I have with the acoustic results is we have no baseline. We have smelt-adult.

Let's say that you got 10% smolt-adult for steelhead. 10 out of 100. So, say you lose 80% to Bonilla Tatoosh. If half of those return as adults you have your "old" 10% but you know most of the loss is in the early time in the Sound.

I do know of a wild coho run that was getting 10-20% smolt to adult back to rack after all the fisheries. For them, losing 80% in-Sound would mean they all had to survive in the absence of fishing.

I really don't know if that in-Sound mortality is high, or not. I do know, though, with steelhead, that nobody has been able to show me a local wild population where the R/S for a brood from spawn to first return is even equal to 1; they are all lower. Means two things, repeat spawners are required and marine survival isn't that good as a base.