Quote Originally Posted by MCXFisher View Post
About 3 years ago I met Salar35 on the Dee. He showed me some PowerPoint slide prints, one of which showed the return to natal stream rates. As far as I can recall they were something around or just over 30%, which led me to point out that this was far from indicative of certainty, least of all supportive of the notion that springers beget springers.
Indeed it appears good evidence that springers do not in fact breed springers, assuming that the adults that spawn there are in fact springers! What that also suggests to me is that smolts out to adults back in those burns is a meaningless statistic. Adults in to smolts out is the important bit.