Introduction
Conclusions
Prosser Dam
Resident Trout
Roza Dam SH
SH
Population
• Multiple collections from a single site tend
to be genetically
similar
Exceptions:
1)
Two Ahtanum collections slightly different
2)
Naches R. and Roza Dam similar
• Populations are differentiated based on
geography
•Ahtanum a
distinct stock
Yakima River Steelhead
Differentiation
Small et al. (2006)
• Evidence suggests little introgression from
hatchery steelhead
Results