Genetic and Phenetic Dynamics of Steelhead Recolonization Above Dams: Green River
Study
Winans and Baker
I report on preliminary genetic and phenetic data we have collected for resident trout
above the Howard Hanson Dam, Green River in comparison to steelhead populations
below the dam. Our goal is to describe the levels and patterns of differentiation prior to
2008 when steelhead will be passed over the dam and juvenile O. mykiss smolts
transported downstream. This diverse set of markers will help us understand who is
producing smolts in this “recolonization” program, and more interestingly, who is
producing adult recruits back to the dam.