There are two good examples above here of speculations about requirements for fish recovery stated as if they were proven fact. I think we should be a little more cautious about making bold statements like that - the fish don't always behave as expected. We fish scientists are notoriously wrong in our predictions. At best those are working hypotheses. The Elwha offers the perfect place to test some of those hypotheses, but - as at Mt St Helens - we are apparently going to toss away the opportunity because of a belief by many that the fish won't recover without our intervention.