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Predicted changes in subyearling fall Chinook salmon rearing and migratory habitat under two drawdown scenarios for John Day Reservoir, Columbia River
We evaluated the potential effects of two different drawdown scenarios on rearing and migration habitat of subyearling fall Chinook salmon Oncorhynchus tshawytscha in John Day Reservoir on the Columbia River. We compared habitats at normal operating pool elevation with habitats at drawdown to spillway crest elevation and drawdown to the historical...Tiffan, K.F.; Garland, R.D.; Rondorf, D.W.
Protective immunity and lack of histopathological damage two years after DNA vaccination against infectious hematopoietic necrosis virus in trout
The DNA vaccine pIHNw-G encodes the glycoprotein of the fish rhabdovirus infectious hematopoietic necrosis virus (IHNV). Vaccine performance in rainbow trout was measured 3, 6, 13, 24, and 25 months after vaccination. At three months all fish vaccinated with 0.1 μg pIHNw-G had detectable neutralizing antibody (NAb) and they were completely...Kurath, Gael; Garver, Kyle A.; Corbeil, Serge; Elliott, Diane G.; Anderson, Eric D.; LaPatra, Scott E.
Re-seeding research will help in cheatgrass battle
Funding from the National Interagency Fire Center’s Joint Fire Science Program is helping researchers in northwestern Arizona determine whether several native grasses can be used to battle invasive cheatgrass following fire in ponderosa pine ecosystems.Allen, Craig D.
Reproductive and early life stages pathology - Histopathology workshop report
Pathology occurring during reproduction and larval development represents an important part of the life cycle of fish, and the diseases that affect eggs and larvae often result in significant losses. However, mortality during this period is frequently ignored or poorly researched as the temptation is to replace the losses rather than investigate...Bruno, D.W.; Nowak, B.; Elliott, Diane G.
Response of fishes to floodplain connectivity during and following a 500-year flood event in the unimpounded upper Mississippi River
We examined data collected on fish assemblage structure among three differing floodplain types (broad, moderate, and narrow) during the 1993 flood in the unimpounded reach of the upper Mississippi River. This 500 year flood event provided a unique opportunity to investigate fish-floodplain function because the main river channel is otherwise...Barko, V.A.; Herzog, D.P.; O'Connell, M. T.
Risk of Myxobolus cerebralis infection to rainbow trout in the Madison River, Montana, USA
Myxobolus cerebralis, the parasite that causes salmonid whirling disease, has had detrimental effects on several salmonid populations in the Intermountain West, including the rainbow trout in the Madison River, Montana, USA. The goal of this study was to examine relationships among characteristics of the environment, Tubifex tubifex (the alternate...Krueger, R.C.; Kerans, B.L.; Vincent, E.R.; Rasmussen, C.
Riverine movements of adult Lost River, shortnose, and Klamath largescale suckers in the Williamson and Sprague rivers, Oregon. Annual report 2004
n/aTyler, T.J.; Ellsworth, C.M.; VanderKooi, S.P.; Shively, R.S.
Seasonal effects of the zebra mussel (Dreissena polymorpha) on sediment denitrification rates in Pool 8 of the Upper Mississippi River
Zebra mussels (Dreissena polymorpha) have altered the structure of invaded ecosystems and exhibit characteristics that suggest they may influence ecosystem processes such as nitrogen (N) cycling. We measured denitrification rates seasonally on sediments underlying zebra mussel beds collected from the impounded zone of Navigation Pool 8 of the...Bruesewitz, Denise A.; Tank, Jennifer L.; Bernot, Melody J.; Richardson, William B.; Strauss, Eric A.
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...Franke, J.; Batts, W.N.; Ahne, W.; Kurath, G.; Winton, J.R.
Sex determination of Pohnpei Micronesian kingfishers using morphological and molecular genetic techniques
Conservation-oriented studies of Micronesian Kingfishers (Todiramphus cinnamominus) have been hindered by a lack of basic natural history information, despite the status of the Guam subspecies (T. c. cinnamominus) as one of the most endangered species in the world. We used tissue samples and morphometric measures from museum specimens and wild-...Kesler, Dylan C.; Lopes, I.F.; Haig, Susan M.
Size dimorphism, molt status, and body mass variation of Prairie Falcons nesting in the Snake River Birds of Prey National Conservation Area
Birds face challenges in how they allocate energy during the reproductive season. Most temperate zone species do not breed and molt at the same time, presumably because of the high energy demands of these two activities (Espie et al. 1996 and citations therein). However, representatives of at least four raptor genera are known to molt during the...Steenhof, Karen; McKinley, James O.
Size dimorphism, molt status, and body mass variation of prairie falcons nesting in the Snake River Birds of Prey National Conservation Area
Thirty-nine bald eagles found sick or dead in 13 States during 1969 and 1970 were analyzed for pesticide residues. Residues of DDE, dieldrin, polychlorinated biphenyls (PCB's), and mercury were detected in all bald eagle carcasses; DDD residues were detected in 38; DDT, heptachlor epoxide, and dichlorobenzophenone (DCBP) were detected less...Steenhof, Karen; McKinley, James O.