Tiffan, Kenneth F.
Project Leader, Salmon Habitat Ecology
Research Fishery Biologist
Email: ktiffan@usgs.gov
Ph: 509-538-2299 ext. 279; Fax: 509-538-2843
5501-A Cook-Underwood Road
Cook, WA 98605-9717
Education:
1992 M.S., Fishery Biology, Colorado State University
1987 B.S., Fishery Biology, Colorado State University
Expertise/Specialty:
Ken Tiffan's research area is the ecology and life history of fall Chinook salmon in the Columbia River basin, with an emphasis on endangered stocks in the Snake River. Current activities include a cooperative study with the U.S. Fish and Wildlife Service on factors affecting different life history pathways selected by juvenile Snake River fall Chinook salmon. Estimating reach survival, fate, and population abundance are areas of emphasis. A different study examines causes for recent trends toward earlier outmigration timing of naturally-produced juveniles in the Snake River and includes density-dependent factors and bioenergetics modeling. Past work has included analyses of chum salmon spawning behavior and habitat requirements in the Columbia River below Bonneville Dam.
Research Interests:
Life History Diversity
Habitat Assessments and Requirements
Fish Behavior
Salmon Ecology
Bioenergetics
Featured Studies:
- Evaluation of summer flow augmentation for juvenile Snake River fall Chinook salmon.
- Investigating winter passage juvenile fall Chinook salmon past lower Snake River dams.
- Quantifying flow-dependent changes in chum salmon spawning behavior.
- Assessing juvenile fall Chinook salmon rearing habitat in the Hanford Reach of the Columbia River.
Select Publications:
Tiffan, K.F., T.J. Kock, C.A. Haskell, W.P. Connor, and R.K. Steinhorst. In Press. Water velocity, turbulence, and migration rate of subyearling fall Chinook salmon in the free-flowing and impounded Snake River. Transactions of the American Fisheries Society.
Tiffan, K.F., T.J. Kock, W.P. Connor, R.K. Steinhorst, and D.W. Rondorf. In Press. Behavioural thermoregulation by subyearling fall Chinook salmon Oncorhynchus tshawytscha (Walbaum) in a reservoir. Journal of Fish Biology.
Tiffan, K.F., L.O. Clark, R.D. Garland, and D.W. Rondorf. 2006. Variables influencing the presence of subyearling fall Chinook salmon in shoreline habitats of the Hanford Reach, Columbia River. North American Journal of Fisheries Management 26:351-360.
Tiffan, K.F., R.D. Garland, and D.W. Rondorf. 2006. Predicted changes in subyearling fall Chinook salmon rearing and migratory habitat under two drawdown scenarios for John Day Reservoir, Columbia River. North American Journal of Fisheries Management 26:894-907.
Tiffan, K.F., D.W. Rondorf, and J.J. Skalicky. 2005. Diel spawning behavior of chum salmon in the Columbia River. Transactions of the American Fisheries Society 134:892-900.
Tiffan, K.F., R.D. Garland, and D.W. Rondorf. 2002. Quantifying flow-dependent changes in subyearling fall Chinook rearing habitat and stranding area using two-dimensional spatially-explicit modeling. North American Journal of Fisheries Management 22:713-726.
