Publications
USGS divers in the Elwha River
WFRC zebrafish laboratory
Processing a Lost River sucker
Below is a list of available WFRC peer reviewed and published science.
Filter Total Items: 2525
Upstream migration of Pacific lampreys in the John Day River, Oregon: Behavior, timing, and habitat use Upstream migration of Pacific lampreys in the John Day River, Oregon: Behavior, timing, and habitat use
Adult Pacific lamprey migration and habitat preferences for over-winter holding and spawning, and larval rearing in tributaries to the Columbia River are not well understood. The John Day River is one such tributary where larval and adult stages of this species have been documented, and its free-flowing character provided the opportunity to study migration of Pacific lampreys unimpeded...
Authors
T. Craig Robinson, J.M. Bayer
Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California Total mercury concentrations in fillets of bluegill, redear sunfish, largemouth bass, and other fishes from Lake Natoma, Sacramento County, California
This study was conducted during September-October 2002 to verify preliminary findings of elevated total mercury concentrations in skinless fillets of sportfishes inhabiting Lake Natoma. Although we measured total mercury concentrations, most mercury in fish flesh occurs in the methylated form. In August 2000, other investigators collected a small number of fish containing mercury...
Authors
M. K. Saiki, B.A. Martin, T.W. May, Charles N. Alpers
Distribution, migration behavior, habitat use, and species interactions of fall-released juvenile hatchery spring Chinook salmon on the Deschutes River, Oregon, 2002, Annual report 2002 Distribution, migration behavior, habitat use, and species interactions of fall-released juvenile hatchery spring Chinook salmon on the Deschutes River, Oregon, 2002, Annual report 2002
In a review of National Fish Hatcheries (NFH), the U.S. Fish and Wildlife Service (USFWS) identified the need to assess the fate of hatchery-reared fish and their potential effect on the aquatic community (USFWS 1998). Additionally, in the Columbia River Biological Opinion, the National Marine Fisheries Service (NMFS) recommended monitoring and evaluating ecological interactions between...
Authors
Rachel E. Reagan, Patrick J. Connolly, Noah S. Adams, Matthew G. Mesa, Dennis W. Rondorf
Assessment of smolt condition: Biological and environmental interactions -- The impact of prey and predators on juvenile salmonids Assessment of smolt condition: Biological and environmental interactions -- The impact of prey and predators on juvenile salmonids
The Bonneville Power Administration (BPA) has funded the Assessment of Smolt Condition project since 1987. During that time the project changed frequently to meet the information needs of fish managers by conducting studies throughout the Columbia River basin. Past research has examined the influence of smolt physiological development and health on migration rate; differences in...
Authors
Sally T. Sauter, Robin M. Schrock, James H. Petersen, Alec G. Maule
Photosynthesis and fluctuating asymmetry as indicators of plant response to soil disturbance in the Fall-Line Sandhills of Georgia: a case study using Rhus copallinum and Ipomoea pandurata Photosynthesis and fluctuating asymmetry as indicators of plant response to soil disturbance in the Fall-Line Sandhills of Georgia: a case study using Rhus copallinum and Ipomoea pandurata
We examined net photosynthesis, transpiration, stomatal conductance, and leaf fluctuating asymmetry on two species (Rhus copallinum and Ipomoea pandurata) as indicators of stress at nine sites across a gradient of soil disturbance at Fort Benning, Georgia. There were three sites for each of three disturbance levels. Physical habitat disturbance was caused by activities associated with...
Authors
D. Carl Freeman, Michelle L. Brown, Jeffrey J. Duda, John H. Graham, John M. Emlen, Anthony J. Krzysik, Harold E. Balbach, David A. Kovacic, John C. Zak
Imaging fall Chinook salmon redds in the Columbia River with a dual-frequency identification sonar Imaging fall Chinook salmon redds in the Columbia River with a dual-frequency identification sonar
We tested the efficacy of a dual-frequency identification sonar (DIDSON) for imaging and enumeration of fall Chinook salmon Oncorhynchus tshawytscha redds in a spawning area below Bonneville Dam on the Columbia River. The DIDSON uses sound to form near-video-quality images and has the advantages of imaging in zero-visibility water and possessing a greater detection range and field of...
Authors
K.F. Tiffan, D.W. Rondorf, J.J. Skalicky
Molecular characterization of birnaviruses isolated from wild marine fishes at the Flemish Cap (Newfoundland) Molecular characterization of birnaviruses isolated from wild marine fishes at the Flemish Cap (Newfoundland)
Several isolates of aquatic birnaviruses were recovered from different species of wild fish caught in the Flemish Cap, a Newfoundland fishery close to the Atlantic coast of Canada. The nucleotide sequence of a region of the NS gene was identical among the isolates and was most similar to the Dry Mills and West Buxton reference strains of infectious pancreatic necrosis virus (IPNV)...
Authors
I. Romero-Brey, W.N. Batts, I. Bandin, J. R. Winton, C.P. Dopazo
Implications of habitat restoration for managing an exotic crayfish at Ash Meadows National Wildlife Refuge Implications of habitat restoration for managing an exotic crayfish at Ash Meadows National Wildlife Refuge
No abstract available
Authors
R.R McShane, K.M. Swaim, G.G. Scoppettone
Estimates of fish, spill, and sluiceway passage efficiencies of radio-tagged juvenile salmonids relative to spring and summer spill treatments at John Day Dam in 2003 Estimates of fish, spill, and sluiceway passage efficiencies of radio-tagged juvenile salmonids relative to spring and summer spill treatments at John Day Dam in 2003
No abstract available
Authors
B. Hausmann, J. Beeman, H. Hansel, S. Juhnke, P. Haner
Information on habitat use of larval Ash Meadows speckled dace Information on habitat use of larval Ash Meadows speckled dace
No abstract available
Authors
R.R McShane, K.M. Swaim, G.G. Scoppettone
Spatial partitioning and asymmetric hybridization among sympatric coastal steelhead trout (Oncorhynchus mykiss irideus), coastal cutthroat trout (O. clarki clarki) and interspecific hybrids Spatial partitioning and asymmetric hybridization among sympatric coastal steelhead trout (Oncorhynchus mykiss irideus), coastal cutthroat trout (O. clarki clarki) and interspecific hybrids
Hybridization between sympatric species provides unique opportunities to examine the contrast between mechanisms that promote hybridization and maintain species integrity. We surveyed hybridization between sympatric coastal steelhead (Oncorhynchus mykiss irideus) and coastal cutthroat trout (O. clarki clarki) from two streams in Washington State, Olsen Creek (256 individuals sampled) and...
Authors
C.O. Ostberg, S.L. Slatton, R. J. Rodriguez