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: 2489
White sturgeon mitigation and restoration in the Columbia and Snake rivers upstream from Bonneville Dam, Annual Progress Report April 2004 - March 2005. Report C
River discharge and water temperatures that occurred during April through July 2004 provided conditions suitable for spawning by white sturgeon downstream from Bonneville, The Dalles, John Day, and McNary dams. Optimal spawning temperatures in the four tailraces occurred for 3-4 weeks and coincided with the peak of the river hydrograph. However, the peak of the hydrograph was relatively low compar
Authors
M.J. Parsley, P. Kofoot
Effects of summer flow augmentation on the migratory behavior and survival of juvenile Snake River fall Chinook salmon. Annual report 2005
This report summarizes results of research activities conducted in 2004 and years previous to aid in the management and recovery of fall Chinook salmon Oncorhynchus tshawytscha in the Columbia River basin. For detailed summaries, we refer the reader to the abstracts given on the second page of each chapter. The Annual Reporting section includes information provided to fishery managers in-season an
Authors
Kenneth F. Tiffan, William P. Connor
Strand-specific, real-time RT-PCR assays for quantification of genomic and positive-sense RNAs of the fish rhabdovirus, Infectious hematopoietic necrosis virus
The fish rhabdovirus, Infectious hematopoietic necrosis virus (IHNV), is an important pathogen of salmonids. Cell culture assays have traditionally been used to quantify levels of IHNV in samples; however, real-time or quantitative RT-PCR assays have been proposed as a rapid alternative. For viruses having a single-stranded, negative-sense RNA genome, standard qRT-PCR assays do not distinguish bet
Authors
Maureen K. Purcell, S. Alexandra Hart, Gael Kurath, James R. Winton
Conservation of Toll-like receptor signaling pathways in teleost fish
In mammals, toll-like receptors (TLR) recognize ligands, including pathogen-associated molecular patterns (PAMPs), and respond with ligand-specific induction of genes. In this study, we establish evolutionary conservation in teleost fish of key components of the TLR-signaling pathway that act as switches for differential gene induction, including MYD88, TIRAP, TRIF, TRAF6, IRF3, and IRF7. We furth
Authors
M. K. Purcell, K.D. Smith, A. Aderem, L. Hood, J. R. Winton, J.C. Roach
AFS men and women differ most in their lifestyle choices
The American Fisheries Society sponsored a survey to examine the career development choices of men and women and how they might differ by gender. A random sample of 700 men and 700 women was selected from the AFS membership database. The survey was mailed out in October 2004 and 991 questionnaires were returned for an adjusted response rate of 71%. Some differences exist between men and women in t
Authors
N.A. Connelly, T.L. Brown, J.M. Hardiman
Ecology of an estuarine mysid shrimp in the Columbia River (USA)
The estuarine mysid, Neomysis mercedis, has colonized John Day and other run-of-the-river Reservoirs of the Columbia River, over 400 km from the estuary. In John Day Reservoir N. mercedis numbers peaked (2 m-3) in August in areas near the dam in association with lower water velocity and softer bottom than at the upstream sampling sites. Neomysis broods were primarily released in late spring and ea
Authors
C. A. Haskell, J. A. Stanford
Ichthyophonus-induced cardiac damage: a mechanism for reduced swimming stamina in salmonids
Swimming stamina, measured as time-to-fatigue, was reduced by approximately two-thirds in rainbow trout experimentally infected with Ichthyophonus. Intensity of Ichthyophonus infection was most severe in cardiac muscle but multiple organs were infected to a lesser extent. The mean heart weight of infected fish was 40% greater than that of uninfected fish, the result of parasite biomass, infiltrati
Authors
R. Kocan, S. LaPatra, J. Gregg, J. Winton, P. Hershberger
Dynamics of viral hemorrhagic septicemia, viral erythrocytic necrosis and ichthyophoniasis in confined juvenile Pacific herring Clupea pallasii
Capture of wild, juvenile herring Clupea pallasii from Puget Sound (Washington, USA) and confinement in laboratory tanks resulted in outbreaks of viral hemorrhagic septicemia (VHS), viral erythrocytic necrosis (VEN) and ichthyophoniasis; however, the timing and progression of the 3 diseases differed. The VHS epidemic occurred first, characterized by an initially low infection prevalence that incre
Authors
P. Hershberger, A. Hart, J. Gregg, N. Elder, J. Winton
Migration depths of juvenile Chinook salmon and steelhead relative to total dissolved gas supersaturation in a Columbia River reservoir
The in situ depths of juvenile salmonids Oncorhynchus spp. were studied to determine whether hydrostatic compensation was sufficient to protect them from gas bubble disease (GBD) during exposure to total dissolved gas (TDG) supersaturation from a regional program of spill at dams meant to improve salmonid passage survival. Yearling Chinook salmon O. tshawytscha and juvenile steelhead O. mykiss imp
Authors
J.W. Beeman, A.G. Maule
Hybridization and cytonuclear associations among native westslope cutthroat trout, introduced rainbow trout, and their hybrids within the Stehekin River drainage, North Cascades National Park
Historic introductions of nonnative rainbow trout Oncorhynchus mykiss into the native habitats of cutthroat trout O. clarkii have impacted cutthroat trout populations through introgressive hybridization, creating challenges and concerns for cutthroat trout conservation. We examined the effects of rainbow trout introductions on the native westslope cutthroat trout O. c. lewisii within the Stehekin
Authors
C.O. Ostberg, R. J. Rodriguez
Improving the precision of otolith-based age estimates for Greenland halibut (Reinhardtius hippoglossoides) with preparation methods adapted for fragile sagittae
[No abstract available]
Authors
J.L. Gregg, D.M. Anderl, D.K. Kimura
Sequence motifs and prokaryotic expression of the reptilian paramyxovirus fusion protein
Fourteen reptilian paramyxovirus isolates were chosen to represent the known extent of genetic diversity among this novel group of viruses. Selected regions of the fusion (F) gene were sequenced, analyzed and compared. The F gene of all isolates contained conserved motifs homologous to those described for other members of the family Paramyxoviridae including: signal peptide, transmembrane domain,
Authors
J. Franke, W.N. Batts, W. Ahne, Gael Kurath, J. R. Winton