Kenneth Tiffan
Snake River fall Chinook salmon were listed as “threatened” under the ESA in 1992. My entire career has focused conducting applied research to provide information that would increase our understanding of this unique stock and facilitate recovery efforts.
The work of myself and colleagues from other agencies have produced most of the contemporary information on Snake River fall Chinook salmon.
Research Interests:
The main focus of my work is understanding Snake River fall Chinook salmon life history and ecology to support recovery of this listed stock. Over the years research topics have included migratory behavior, habitat use and quantification, physiology, and feeding ecology of juvenile fish in the Snake and Columbia rivers. Other research areas have included understanding the effects of elevated flows on chum salmon spawning behavior, and investigating recent food web changes to lower Snake River reservoirs.
Professional Experience
1992 to Present – Research Fish Biologist, U.S. Geological Survey, Western Fisheries Research Center, Columbia River Research Laboratory, Cook, WA
Education and Certifications
M.S. 1992. Fishery Biology, Colorado State University, Fort Collins, CO
B.S. 1987. Fishery Biology, Colorado State University, Fort Collins, CO
Science and Products
Diel spawning behavior of chum salmon in the Columbia River
Two alternative juvenile life history types for fall Chinook salmon in the Snake River basin
Biological science in Oregon
Juvenile and adult fall Chinook and chum salmon habitat studies below Bonneville Dam on the Columbia River. Annual report 2002-2003
Investigating passage of ESA-listed juvenile fall Chinook salmon at Lower Granite Dam during winter when the fish bypass system is not operated. Annual report 2003
Passage of juvenile fall Chinook salmon at Lower Granite Dam during winter. Annual report 2003
No abstract available
Water temperature effects on fall Chinook salmon in the Snake and Columbia Rivers
Abstract not available
Imaging fall Chinook salmon redds in the Columbia River with a dual-frequency identification sonar
Assessment of chum and fall Chinook salmon spawning habitat near Ives and Pierce islands in the Columbia River. 1999-2001
Effects of summer flow augmentation on the migratory behavior and survival of juvenile Snake River fall Chinook salmon. Annual report 2002
Crims Island habitat restoration in the Columbia River estuary-fisheries monitoring and evaluation. 2003 Draft report of research
Water temperature effects on fall Chinook salmon in the Snake and Columbia Rivers. 2001 Final report of research
Science and Products
Diel spawning behavior of chum salmon in the Columbia River
Two alternative juvenile life history types for fall Chinook salmon in the Snake River basin
Biological science in Oregon
Juvenile and adult fall Chinook and chum salmon habitat studies below Bonneville Dam on the Columbia River. Annual report 2002-2003
Investigating passage of ESA-listed juvenile fall Chinook salmon at Lower Granite Dam during winter when the fish bypass system is not operated. Annual report 2003
Passage of juvenile fall Chinook salmon at Lower Granite Dam during winter. Annual report 2003
No abstract available
Water temperature effects on fall Chinook salmon in the Snake and Columbia Rivers
Abstract not available