Age at sexual maturity, sex ratio, fecundity, and longevity of isolated headwater populations of westslope cutthroat trout
Christopher C. Downs, Robert G. White, Bradely B. Shepard
2011, North American Journal of Fisheries Management (17) 85-92
We sampled 19 isolated headwater populations of westslope cutthroat trout Oncorhynchus clarki lewisi in Montana to provide estimates of fecundity, longevity, sex ratio, and age at sexual maturity. Fecundity was estimated for 31 fish collected from two streams in the upper Missouri River drainage. Females smaller than 149 mm fork length (FL)...
Trends in relative weight of walleye stocks in Wyoming reservoirs
T.D. Marwitz, W.A. Hubert
2011, North American Journal of Fisheries Management (17) 44-53
The relative weight (Wr) index of body condition provided insight into the stock dynamics of walleye Stizostedion vitreum in six reservoirs in the North Platte River drainage of Wyoming. The three most upstream reservoirs are managed as both walleye and trout (Oncorhynchus spp. and Salmo spp.) fisheries; trout are stocked annually. The three downstream reservoirs...
Movement of saugers in the lower Tennessee River determined by radio telemetry, and implications for management
M.A. Pegg, P.W. Bettoli, J.B. Layzer
2011, North American Journal of Fisheries Management (17) 763-768
Since 1979, abundances of sauger Stizostedion canadense have declined in the Tennessee River system. Reasons for this decline may include overharvest, loss of spawning habitat, and low recruitment due to extreme flows. The purpose of this study was to investigate the movements of saugers following winter concentration below Pickwick Dam, Tennessee. Thirty-seven...
Estimating the impacts of reservoir elevation changes on kokanee emergence in Flaming Gorge Reservoir, Wyoming-Utah
T. Modde, R.J. Jeric, W.A. Hubert, R.D. Gipson
2011, North American Journal of Fisheries Management (17) 470-473
Flaming Gorge Reservoir, like many western North American reservoirs, is managed to release water during the winter months to allow for water storage associated with melting snow and rain during spring. Decreases in reservoir elevation during winter can cause mortalities of kokanee Oncorhynchus nerka spawned along the shoreline the previous fall. This...
Relationship between vegetation coverage and abundance, size, and diet of juvenile largemouth bass during winter
L.E. Miranda, L.L. Pugh
2011, North American Journal of Fisheries Management (17) 601-610
Juvenile largemouth bass Micropterus salmoides were collected by electrofishing during October through March 1992–1994 from coves (≤25 ha) covered with aquatic macrophytes over 1–65% of their area. Mean total length of juvenile largemouth bass was highest in coves with the least vegetated cover, but increase in mean length between October and March...
The effects of wetland restoration on mercury bioaccumulation in the South Bay Salt Pond Restoration Project: Using the biosentinel toolbox to monitor changes across multiple habitats and spatial scales
Joshua T. Ackerman, Mark Marvin-DiPasquale, Darell Slotton, Mark P. Herzog, Collin A. Eagles-Smith
2011, Report, 2010 Annual Report to the Resources Legacy Fund, State Coastal Conservancy, and South Bay Salt Ponds Restoration Program
The project was initiated in April 2010, and to date has included four sampling events of surface water (April, May, June/July, and August 2010) and five sampling events of biota (April, May, June/July, August, and September 2010) and three sampling events for surface...
Modeling the fate and transport of polyaromatic hydrocarbons in the saturated zone, Grand Isle, Louisiana
Francis H. Chapelle, Mark A. Widdowson
2011, Report, Summary report for fate and effects of remnant oil remaining in the beach environment
No abstract available....
Seasonal Flux and Assemblage Composition of Planktic Foraminifera from the Northern Gulf of Mexico, 2008-2009
Jessica W. Spear, Richard Z. Poore
2011, Open-File Report 2011-1002
The U.S. Geological Survey established a sediment trap in the northern Gulf of Mexico to collect time-series data on the flux and assemblage composition of live planktic foraminifers. This report provides an update of the 2008 time-series data to include results from 2009. Ten species, or varieties, of planktic foraminifers...
Meat and bone meal and mineral feed additives may increase the risk of oral prion disease transmission
Christopher J. Johnson, Debbie McKenzie, Joel A. Pedersen, Judd M. Aiken
2011, Journal of Toxicology and Environmental Health, Part A (74) 161-166
Ingestion of prion-contaminated materials is postulated to be a primary route of prion disease transmission. Binding of prions to soil (micro)particles dramatically enhances peroral disease transmission relative to unbound prions, and it was hypothesized that micrometer-sized particles present in other consumed materials may affect prion disease transmission via the oral...
Aftershock distribution as a constraint on the geodetic model of coseismic slip for the 2004 Parkfield earthquake
Ninfa Bennington, Clifford Thurber, Kurt Feigl, Murray-Moraleda Jessica
2011, Pure and Applied Geophysics (168) 1553-1565
Several studies of the 2004 Parkfield earthquake have linked the spatial distribution of the event’s aftershocks to the mainshock slip distribution on the fault. Using geodetic data, we find a model of coseismic slip for the 2004 Parkfield earthquake with the constraint that the edges of coseismic slip patches align...
Quantifying solute transport processes: Are chemically "conservative" tracers electrically conservative?
Kamini Singha, Li Li, Frederick D. Day-Lewis, Aaron B. Regberg
2011, Geophysics (76) F53-F63
The concept of a nonreactive or conservative tracer, commonly invoked in investigations of solute transport, requires additional study in the context of electrical geophysical monitoring. Tracers that are commonly considered conservative may undergo reactive processes, such as ion exchange, thus changing the aqueous composition of the system. As a result,...
Host specificity and ecology of infectious hematopoietic necrosis virus (IHNV) in Pacific salmonids
Gael Kurath, A. K. Garver K., M. K. Purcell, Ma. Penaranda Michelle, Svetlana Rudakova Svetlana
R. C. Cipriano, A.W. Bruckner, I.S. Shchelkunov, editor(s)
2011, Conference Paper, Bridging America and Russia with shared perspectives on aquatic animal health: Proceedings of the Third Bilateral Conference between Russia and the United States
Some circumstances IHNV infection can cause acute disease with mortality ranging from 5-90% in host populations. Genetic typing of IHNV field isolates has shown that three major genetic groups of the virus occur in North America. These groups are designated the U, M, and L virus genogroups because they occur...
Chapter 10: Occurrence of non-native invasive plants: The role of anthropogenic features
Scott E. Nielsen, Cameron L. Aldridge, Steven E. Hanser, Matthias Leu, Steven T. Knick
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
The invasion of non-native plants in the Wyoming Basins Ecoregional Assessment (WBEA) area is a major economic and ecological stress, with invasions thought to be hastened by energy developments. Given the potential impacts of nonnative invasive plants and the rapid changes in land use in the WBEA, broad-scale assessments and...
Chapter 9: Occurrence of small mammals: Deer mice and challenge of trapping across large spatial extents
Steven E. Hanser, Matthias Leu, Cameron L. Aldridge, Scott E. Nielsen, Steven T. Knick
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
Small mammal communities living in sagebrush (Artemisia spp.) may be sensitive to habitat isolation and invasion by exotic grass species. Yet there have been no spatially explicit models to improve our understanding of landscape-scale factors determining small mammal occurrence or abundance. We live-trapped small mammals at 186 locations in the...
Chapter 11: Management considerations
Steven T. Knick, Steven E. Hanser, Matthias Leu, Cameron L. Aldridge, Scott E. Nielsen, Mary M. Rowland, Sean P. Finn, Michael J. Wisdom
2011, Book chapter, Sagebrush ecosystem conservation and management: Ecoregional assessment tools and models for the Wyoming Basins
We conducted an ecoregional assessment of sagebrush (Artemisia spp.) ecosystems in the Wyoming Basins and surrounding regions (WBEA) to determine broad-scale species-environmental relationships. Our goal was to assess the potential influence from threats to the sagebrush ecosystem on associated wildlife through the use of spatially explicit occurrence and abundance models....
Book review: The Tallgrass Prairie Center guide to seed and seedling identification in the Upper Midwest
Diane L. Larson, Susan M. Galatowitsch
2011, Prairie Naturalist (43)
This attractive, slim volume provides a wonderful introduction to a neglected aspect of prairie plant identification: seeds and seedlings. Williams, and the illustrator Brent Butler, take the mystery out of dichotomous keys with clear descriptions, vivid illustrations, and abundant photographs of characteristics that distinguish common, tallgrass prairie, seedlings. A botanical...
Portrait of a small population of boreal toads (Anaxyrus boreas)
Erin Muths, Rick D. Scherer
2011, Herpetologica (67) 369-377
Much attention has been given to the conservation of small populations, those that are small because of decline, and those that are naturally small. Small populations are of particular interest because ecological theory suggests that they are vulnerable to the deleterious effects of environmental, demographic, and genetic stochasticity as well...
A new species of Perlesta (Plecoptera: Perlidae) from North Carolina with additional records for North Carolina and Virginia
B.C. Kondratieff, R.E. Zuellig, D. R. Lenat
2011, Illiesia (7) 297-301
Twenty-eight species of Nearctic Perlesta are currently recognized (Stark 1989, 2004; Kondratieff et al. 2006, 2008; Grubbs and DeWalt 2008, Grubbs and DeWalt 2011, Kondratieff and Myers 2011). Interestingly, but needing confirmation, Perlesta has been recently recorded from Central America (Gutiérrez-Fonseca and Springer 2011). Continued collecting and study of Perlesta...
Allelopathic cover crop prior to seeding is more important than subsequent grazing/mowing in grassland establishment
Daniel G. Milchunas, Mark W. Vandever, Leonard O. Ball, Skip Hyberg
2011, Rangeland Ecology and Management (64) 291-300
The effects of grazing, mowing, and type of cover crop were evaluated in a previous winter wheat–fallow cropland seeded to grassland under the Conservation Reserve Program in eastern Colorado. Prior to seeding, the fallow strips were planted to forage sorghum or wheat in alternating strips (cover crops), with no grazing,...
Pliocene Model Intercomparison Project (PlioMIP): experimental design and boundary conditions (Experiment 2)
A.M. Haywood, Harry J. Dowsett, Marci M. Robinson, Danielle K. Stoll, A.M. Dolan, D.J. Lunt, B. Otto-Bliesner, M.A. Chandler
2011, Geoscientific Model Development (4) 571-577
The Palaeoclimate Modelling Intercomparison Project has expanded to include a model intercomparison for the mid-Pliocene warm period (3.29 to 2.97 million yr ago). This project is referred to as PlioMIP (the Pliocene Model Intercomparison Project). Two experiments have been agreed upon and together compose the initial phase of PlioMIP. The...
Assessment of mangrove forests in the Pacific region using Landsat imagery
Bibek Bhattarai, Chandra Giri
2011, Journal of Applied Remote Sensing (5)
The information on the mangrove forests for the Pacific region is scarce or outdated. A regional assessment based on a consistent methodology and data sources was needed to understand their true extent. Our investigation offers a regionally consistent, high resolution (30 m), and the most comprehensive mapping of mangrove forests...
Challenges of predicting the potential distribution of a slow-spreading invader: a habitat suitability map for an invasive riparian tree
Catherine S. Jarnevich, Lindsay V. Reynolds
2011, Biological Invasions (13) 153-163
Understanding the potential spread of invasive species is essential for land managers to prevent their establishment and restore impacted habitat. Habitat suitability modeling provides a tool for researchers and managers to understand the potential extent of invasive species spread. Our goal was to use habitat suitability modeling to map potential...
Geologic map of the Caetano caldera, Lander and Eureka counties, Nevada
Joseph P. Colgan, Christopher D. Henry, David A. John
2011, Nevada Bureau of Mines and Geology Map 174
The Eocene (34 Ma) Caetano caldera in north-central Nevada offers an exceptional opportunity to study the physical and petrogenetic evolution of a large (20 km by 10–18 km pre-extensional dimensions) silicic magma chamber, from precursor magmatism to caldera collapse and intrusion of resurgent plutons. Caldera-related rocks shown on this map...
Seismic swarm associated with the 2008 eruption of Kasatochi Volcano, Alaska: earthquake locations and source parameters
Natalia G. Ruppert, Stephanie G. Prejean, Roger A. Hansen
2011, Journal of Geophysical Research (116)
An energetic seismic swarm accompanied an eruption of Kasatochi Volcano in the central Aleutian volcanic arc in August of 2008. In retrospect, the first earthquakes in the swarm were detected about 1 month prior to the eruption onset. Activity in the swarm quickly intensified less than 48 h prior to...
I3N risk assessment and pathway analysis: Tools for the prevention of biological invasions
Annie Simpson, Elizabeth A. Sellers
2011, Conference Paper, Plant invasions: Policies, politics, and practices; Proceedings of the 5th Biennial Weeds Across Borders Conference
Information on invasive alien species from published and unpublished accounts and databases is usually scattered in locations and formats that are not easily accessible. Customized informatics tools for collecting and organizing invasive species information can help resource managers better control biological invasions. The Invasives Information Network (I3N) of the Inter-American...
