Fish and Aquatic Species Publications
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Filter Total Items: 322
Reconnecting fragmented sturgeon populations in North American rivers
The majority of large North American rivers are fragmented by dams that interrupt migrations of wide-ranging fishes like sturgeons. Reconnecting habitat is viewed as an important means of protecting sturgeon species in U.S. rivers because these species have lost between 5% and 60% of their historical ranges. Unfortunately, facilities designed to pass other fishes have rarely worked well for sturge
Authors
Henriette Jager, Michael J. Parsley, Joseph J. Jr. Cech, R. L. McLaughlin, Patrick S. Forsythe, Robert S. Elliott
Efficiency of portable antennas for detecting passive integrated transponder tags in stream-dwelling salmonids
Portable antennas have become an increasingly common technique for tracking fish marked with passive integrated transponder (PIT) tags. We used logistic regression to evaluate how species, fish length, and physical habitat characteristics influence portable antenna detection efficiency in stream-dwelling brown trout (Salmo trutta), bull trout (Salvelinus confluentus), and redband trout (Oncorhynch
Authors
Nolan P. Banish, Summer M. Burdick, Katherine R. Moyer
Characterization of infectious dose and lethal dose of two strains of infectious hematopoietic necrosis virus (IHNV)
The ability to infect a host is a key trait of a virus, and differences in infectivity could put one virus at an evolutionary advantage over another. In this study we have quantified the infectivity of two strains of infectious hematopoietic necrosis virus (IHNV) that are known to differ in fitness and virulence. By exposing juvenile rainbow trout (Oncorhynchus mykiss) hosts to a wide range of vir
Authors
Douglas McKenney, Gael Kurath, Andrew Wargo
Survival, movement, and health of hatchery-raised juvenile Lost River suckers within a mesocosm in Upper Klamath Lake, Oregon
The recovery of endangered Lost River suckers (Deltistes luxatus) in Upper Klamath Lake is limited by poor juvenile survival and failure to recruit into the adult population. Poor water quality, degradation of rearing habitat, and toxic levels of microcystin are hypothesized to contribute to low juvenile survival. Studies of wild juvenile suckers are limited in that capture rates are low and compr
Authors
Danielle M. Hereford, Summer M. Burdick, Diane G. Elliott, Amari Dolan-Caret, Carla M. Conway, Alta C. Harris
Development of working hypotheses linking management of the Missouri River to population dynamics of Scaphirhynchus albus (pallid sturgeon)
This report documents a process of filtering of hypotheses that relate Missouri River Scaphirhynchus albus (pallid sturgeon) population dynamics to management actions including flow alterations, channel reconfigurations, and pallid sturgeon population augmentation. The filtering process was a partnership among U.S. Geological Survey, U.S. Army Corps of Engineers, and U.S. Fish and Wildlife Service
Authors
Robert B. Jacobson, Michael J. Parsley, Mandy L. Annis, Michael E. Colvin, Timothy L. Welker, Daniel A. James
Increasing virulence, but not infectivity, associated with serially emergent virus strains of a fish rhabdovirus
Surveillance and genetic typing of field isolates of a fish rhabdovirus, infectious hematopoietic necrosis virus (IHNV), has identified four dominant viral genotypes that were involved in serial viral emergence and displacement events in steelhead trout (Oncorhynchus mykiss) in western North America. To investigate drivers of these landscape-scale events, IHNV isolates designated 007, 111, 110, an
Authors
Rachel Breyta, Douglas McKenney, Tarin Tesfaye, Kotaro Ono, Gael Kurath
Displaced phylogeographic signals from Gyrodactylus arcuatus, a parasite of the three-spined stickleback Gasterosteus aculeatus, suggest freshwater glacial refugia in Europe
We examined the global mitochondrial phylogeography of Gyrodactylus arcuatus, a flatworm ectoparasite of three-spined stickleback Gasterosteus aculeatus. In accordance with the suggested high divergence rate of 13%/million years, the genetic variation of the parasite was high: haplotype diversity h = 0.985 and nucleotide diversity π = 0.0161. The differentiation among the parasite populations was
Authors
Jaakko Lumme, Hannu Mäkinen, Alexey V. Ermolenko, Jacob L. Gregg, Marek S. Ziętara
Downstream passage and impact of turbine shutdowns on survival of silver American Eels at five hydroelectric dams on the Shenandoah River
Hydroelectric dams impact the downstream migrations of silver American Eels Anguilla rostrata via migratory delays and turbine mortality. A radiotelemetry study of American Eels was conducted to determine the impacts of five run-of-the-river hydroelectric dams located over a 195-km stretch of the Shenandoah River, Virginia–West Virginia, during fall 2007–summer 2010. Overall, 96 radio-tagged indiv
Authors
Sheila Eyler, Stuart A. Welsh, David R. Smith, Mary Rockey
Status of White Sturgeon (Acipenser transmontanus Richardson, 1863) throughout the species range, threats to survival, and prognosis for the future
White Sturgeon, Acipenser transmontanus (WS), are distributed throughout three major river basins on the West Coast of North America: the Sacramento-San Joaquin, Columbia, and Fraser River drainages. Considered the largest North American freshwater fish, some WS use estuarine habitat and make limited marine movements between river basins. Some populations are listed by the United States or Canada
Authors
L. R. Hildebrand, Andrea Drauch Schreier, K. Lepla, S. O. McAdam, J McLellan, Michael J. Parsley, V L Paragamian, S P Young
Spatial and temporal heterogeneity of infectious hematopoietic necrosis virus in Pacific Northwest salmonids
The aquatic rhaboviral pathogen infectious hematopoietic necrosis virus (IHNV) causes acute disease in juvenile fish of a number of populations of Pacific salmonid species. Heavily managed in both marine and freshwater environments, these fish species are cultured during the juvenile stage in freshwater conservation hatcheries, where IHNV is one of the top three infectious diseases that cause seri
Authors
Rachel Breyta, Allison Black, John Kaufman, Gael Kurath
Feeding ecology of non-native Siberian prawns, Palaemon modestus (Heller, 1862) (Decapoda, Palaemonidae), in the lower Snake River, Washington, U.S.A.
We used both stomach content and stable isotope analyses to describe the feeding ecology of Siberian prawns Palaemon modestus (Heller, 1862), a non-native caridean shrimp that is a relatively recent invader of the lower Snake River. Based on identifiable prey in stomachs, the opossum shrimp Neomysis mercedis Holmes, 1896 comprised up to 34-55% (by weight) of diets of juvenile to adult P. modestus,
Authors
Kenneth F. Tiffan, William Hurst
Synthesis of juvenile lamprey migration and passage research and monitoring at Columbia and Snake River Dams
We compiled and summarized previous sources of data and research results related to the presence, numbers, and migration timing characteristics of juvenile (eyed macropthalmia) and larval (ammocoetes) Pacific lamprey Entosphenus tridentatus, in the Columbia River basin (CRB). Included were data from various screw trap collections, data from historic fyke net studies, catch records of lampreys at J
Authors
Matthew G. Mesa, Lisa K. Weiland, Helena E. Christiansen
Evolution of viral virulence: empirical studies
The concept of virulence as a pathogen trait that can evolve in response to selection has led to a large body of virulence evolution theory developed in the 1980-1990s. Various aspects of this theory predict increased or decreased virulence in response to a complex array of selection pressures including mode of transmission, changes in host, mixed infection, vector-borne transmission, environmenta
Authors
Gael Kurath, Andrew R. Wargo
Science information to support Missouri River Scaphirhynchus albus (pallid sturgeon) effects analysis
The Missouri River Pallid Sturgeon Effects Analysis (EA) was commissioned by the U.S. Army Corps of Engineers to develop a foundation of understanding of how pallid sturgeon (Scaphirhynchus albus) population dynamics are linked to management actions in the Missouri River. The EA consists of several steps: (1) development of comprehensive, conceptual ecological models illustrating pallid sturgeon p
Authors
Robert B. Jacobson, Michael J. Parsley, Mandy L. Annis, Michael E. Colvin, Timothy L. Welker, Daniel A. James
Dam removal increases American eel abundance in distant headwater streams
American eel Anguilla rostrata abundances have undergone significant declines over the last 50 years, and migration barriers have been recognized as a contributing cause. We evaluated eel abundances in headwater streams of Shenandoah National Park, Virginia, to compare sites before and after the removal of a large downstream dam in 2004 (Embrey Dam, Rappahannock River). Eel abundances in headwater
Authors
Nathaniel P. Hitt, Sheila Eyler, John E. B. Wofford
Pacific lamprey artificial propogation and rearing investigations: Rocky Reach Lamprey Management Plan
The impetus for developing this document is through implementing the Rocky Reach Pacific Lamprey Management Plan (PLMP), a component of the Rocky Reach Comprehensive Settlement Agreement, both of which are discussed more thoroughly in Section 1.2. The ultimate goal of the PLMP is to achieve No Net Impact (NNI) to Pacific lamprey of ongoing operations of the Rocky Reach Hydroelectric Project. Condu
Authors
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Impacts of climate change on Oregon's coasts and estuaries
Earth’s changing climate is expected to have significant physical impacts along the coast and estuarine shorelands of Oregon, ranging from increased erosion and inundation of low lying areas, to wetland loss and increased estuarine salinity. The environmental changes associated with climate change include rising sea levels, increased occurrences of severe storms, rising air and water temperatures,
Authors
Peter Ruggerio, Cheryl A. Brown, Paul D. Komar, Jonathan C. Allan, Deborah A. Reusser, Henry Lee
Gas bubble disease monitoring and research of juvenile salmonids, 1998
No abstract available.
Authors
J.W. Beeman, T.C. Robinson, P.V. Haner, S. P. VanderKooi, A.G. Maule
Successful aquatic animal disease emergency programmes
The authors provide examples of emergency programmes which have been successful in eradicating or controlling certain diseases of aquatic animals. The paper is divided into four parts.
The first part describes the initial isolation of viral haemorrhagic septicaemia (VHS) virus in North America in the autumn of 1988 from feral adult chinook (Oncorhynchus tshawytscha) and coho salmon (O.kisutch) ret
Authors
T. Hastein, B.J. Hill, J. R. Winton
Heterosigma bloom and associated fish kill
No abstract available.
Authors
P.K. Hershberger, J.E. Rensel, J. R. Postel, F.B. Taub
Effects of supplementation with hatchery fish on carrying capacity and productivity of naturally spawning populations of steelhead
No abstract available
Authors
R.R. Reisenbichler