Location: Coast Range Western Oregon

Freshwater water habitat has been identified as a major factor limiting smolt production. Legacy land use impacts have reduced and simplified instream habitat required by juvenile coho to survival high overwinter flows. Overwinter survival has been associated with size of coho parr going into the winter period and the amount of flow refugia.

This was large-scale analysis project evaluating factors associated with:

• mark-recapture of PIT tagged coho salmon
• factors associated with end of summer parr abundance and weight
• factors associated with overwinter survival
• intermittent stream use by juvenile coho salmon

The results of this work can be found in:

Ebersole, J.L., Colvin, M.E., Wigington, P.J., Leibowitz, S.G., Baker, J.P., Church, M.R., Compton, J.E. and Cairns, M.A., 2009. Hierarchical Modeling of Late-Summer Weight and Summer Abundance of Juvenile Coho Salmon across a Stream Network. Transactions of the American Fisheries Society, 138:1138-1156. PDF

Ebersole, J.L., Colvin, M.E., Wigington, P.J., Leibowitz, S.G., Baker, J.P., Church, M.R., Compton, J.E., Miller, B.A., Cairns, M.A., Hansen, B.P. and La Vigne, H.R., 2009. Modeling Stream Network-Scale Variation in Coho Salmon Overwinter Survival and Smolt Size. Transactions of the American Fisheries Society, 138:564-580. PDF

Wigington, P.J., Ebersole, J.E., Colvin, M.E., Leibowitz, S.G., Miller, B., Hansen, B., Lavigne, H.R., White, D., Baker, J.P., Church, M.R., Brooks, J.R., Cairns, M.A. and Compton, J.E., 2006. Coho salmon dependence on intermittent streams. Frontiers in Ecology and the Environment, 4:513-518. PDF