Like Sg, I'll keep fishing until it's no longer worthwhile, feeling confident in that my impact is essentially negligible.

The troubling thing about steelhead is that we don't really understand the reasons why they don't seem to respond to our (fairly honest) efforts to recover them. I don't think there's good evidence to suggest that us stopping fishing will keep them around any longer than what we're doing now, so I think overall, it's better for the future of the fish to have a voice in the human community. Without sport fishing, there will be no voice, so I say keep fishing, and be as respectful to the fish you catch as possible.