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: 2551
Managing water in the West: developing new tools for a critical resource Managing water in the West: developing new tools for a critical resource
Rapid population growth in the Western United States over the last century has placed increasing strains on our water supplies and aquatic ecosystems. Historically, water rights have been used to determine the allocation of water in the West, but rules and regulations related to endangered species now often drive how water is released from reservoirs in large rivers such as the lower...
Authors
G.G. Scoppettone, D. Gadomski, J. Petersen, J. Hatten
Habitat restoration as a means of controlling non-native fish in a Mojave desert Oasis Habitat restoration as a means of controlling non-native fish in a Mojave desert Oasis
Non-native fish generally cause native fish decline, and once non-natives are established, control or elimination is usually problematic. Because non-native fish colonization has been greatest in anthropogenically altered habitats, restoring habitat similar to predisturbance conditions may offer a viable means of non-native fish control. In this investigation we identified habitats...
Authors
G.G. Scoppettone, P.H. Rissler, C. Gourley, C. Martinez
Problems with sampling desert tortoises: A simulation analysis based on field data Problems with sampling desert tortoises: A simulation analysis based on field data
The desert tortoise (Gopherus agassizii) was listed as a U.S. threatened species in 1990 based largely on population declines inferred from mark-recapture surveys of 2.59-km2 (1-mi2) plots. Since then, several census methods have been proposed and tested, but all methods still pose logistical or statistical difficulties. We conducted computer simulations using actual tortoise location...
Authors
J.E. Freilich, R.J. Camp, J.J. Duda, A.E. Karl
Comparison of individual and pooled sampling methods for detecting bacterial pathogens of fish Comparison of individual and pooled sampling methods for detecting bacterial pathogens of fish
Examination of finfish populations for viral and bacterial pathogens is an important component of fish disease control programs worldwide. Two methods are commonly used for collecting tissue samples for bacteriological culture, the currently accepted standards for detection of bacterial fish pathogens. The method specified in the Office International des Epizooties Manual of Diagnostic...
Authors
Sonia Mumford, Chris Patterson, J. Evered, Ray Brunson, J. Levine, J. Winton
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