Cryopreservation of Sperm from the Endangered Colorado Pikeminnow
T.R. Tiersch, C.R. Figiel Jr., W.R. Wayman, J.H. Williamson, O. T. Gorman, G.J. Carmichael
2004, North American Journal of Aquaculture (66) 8-14
We developed methods for the cryopreservation of sperm of the endangered Colorado pikeminnow Ptychocheilus lucius. Sperm were collected from a captive broodstock population of Colorado pikeminnow reared and maintained at the Dexter National Fish Hatchery and Technology Center. Our objectives were to (1) evaluate the effects on sperm motility of...
Hydrological effects of soil water repellency: On spatial and temporal uncertainties
S.H. Doerr, J. A. Moody
2004, Hydrological Processes (18) 829-832
[No abstract available]...
Comparison of catch and lake trout bycatch in commercial trap nets and gill nets targeting lake whitefish in northern Lake Huron
James E. Johnson, Mark P. Ebener, Kenneth Gebhardt, Roger Bergstedt
2004, Fisheries Research Report 2071
We compared seasonal lake whitefish catch rates, lake trout bycatch, and gearinduced lake trout mortality between commercial trap nets and gill nets in north-central Lake Huron. Onboard monitors recorded catches from 260 gill net and 96 trap net lifts from October 1998 through December 1999. Catch rates for lake whitefish...
Climate and hydrology of the last interglaciation (MIS 5) in Owens Basin, California: Isotopic and geochemical evidence from core OL-92
H.-C. Li, J. L. Bischoff, T.-L. Ku, Z.-Y. Zhu
2004, Quaternary Science Reviews (23) 49-63
??18O, ??13C, total organic carbon, total inorganic carbon, and acid-leachable Li, Mg and Sr concentrations on 443 samples from 32 to 83 m depth in Owens Lake core OL-92 were analyzed to study the climatic and hydrological conditions between 60 and 155 ka with a resolution of ???200 a. The...
Influence of forest management on headwater stream amphibians at multiple spatial scales
Margo Stoddard, John P. Hayes, Janet L. Erickson
2004, Fact Sheet 2004-3018
Background Amphibians are important components of headwater streams in forest ecosystems of the Pacific Northwest (PNW). They comprise the highest vertebrate biomass and density in these systems and are integral to trophic dynamics both as prey and as predators. The most commonly encountered amphibians in PNW headwater streams include the Pacific...
Light dependence of selenium uptake by phytoplankton and implications for predicting selenium incorporation into food webs
S.B. Baines, N.S. Fisher, M.A. Doblin, G.A. Cutter, L.S. Cutter, B. Cole
2004, Limnology and Oceanography (49) 566-578
The potentially toxic element selenium is first concentrated from solution to a large but highly variable degree by algae and bacteria before being passed on to consumers. The large loads of abiotic and detrital suspended particles often present in rivers and estuaries may obscure spatial and temporal patterns in Se...
Prefire risk assessment and fuels mapping
J. W. van Wagtendonk, Z. Zhu, E.L. Lile
2004, Book chapter
No abstract available at this time...
Rehabilitation of a lignite mine-disturbed area in the Indian Desert
K.D. Sharma, P. Kumar, L. P. Gough, J.R. SanFilipo
2004, Land Degradation and Development (15) 163-176
Extensive lignite mining in the Indian (Thar) Desert commenced within the past decade. Accompanying extraction of this valuable resource there have been visible, important environmental impacts. The resultant land degradation has prompted concern from both public and regulatory bodies. This research assesses the success of rehabilitation plans implemented to revegetate...
First-year growth, condition, and size-selective winter mortality of freshwater drum in the lower Missouri River
P.J. Braaten, C.S. Guy
2004, Transactions of the American Fisheries Society (133) 385-398
We compared first-year growth and relative condition (Kn) of the 1997 and 1998 year-classes of freshwater drum Aplodinotus grunniens among three sites in a 235-km reach of the channelized Missouri River and tested for the occurrence of size-selective overwinter mortality during the first winter. Prewinter mean length was 15 mm...
Background and applications of the Legal-Institutional Analysis Model (LIAM) for management of infrastructures
B. L. Lamb, N. Burkardt, D. Lybecker
2004, Conference Paper, Proceedings of Infrastructure and Environmental Management symposium
No abstract available....
Magmatic precursors to the 18 May 1980 eruption of Mount St. Helens, USA
K. V. Cashman, R. Hoblitt
2004, Geology (32) 141-144
Perhaps the most difficult task facing volcanologists today is that of distinguishing between low-level volcanic restlessness and activity that presages a full-scale eruption. We illustrate these difficulties by reexamining the sequence of events that led to the 18 May 1980 eruption of Mount St. Helens, activity that is often presented...
A prototype for understanding the effects of TMDL standards: Tying property values to sediment loads in the Lake Tahoe Basin
J.C. Tracy, R. Bernknopf, W. Forney, K. Hill
2004, Conference Paper, Watershed Management and Operations Management 2000
The Federal Clean Water Act (Section 303(d)) mandates that states develop Total Maximum Daily Load (TMDL) plans for water bodies that are on the Section 303(d) list. To be placed on the 303(d) list, a water body must be found to have water quality conditions that limit its ability to...
Colorado Canyons National Conservation Area 2003 visitor use survey: Completion report
Phadrea Ponds, Shana C. Gillette, Lynne Koontz
2004, Open-File Report 2004-1281
This report represents the analysis of research conducted by the U.S. Geological Survey (USGS) for the Bureau of Land Management (BLM). The purpose is to provide socio-economic and recreational use information that can be used in the development of a Resource Management Plan (RMP) for the Colorado Canyons National Conservation...
Stratton Sagebrush Hydrology Study Area: An annotated bibliography of research conducted 1968-1990
Leah M. Burgess, Kathryn A. Schoenecker
2004, Open-File Report 2004-1291
This annotated bibliography provides an overview of research projects conducted on the Stratton Sagebrush Hydrology Study Area (Stratton) since its designation as such in 1967. Sources include the Rocky Mountain Forest and Range Experiment Station records storage room, Laramie, Wyoming, the USGS and USFS online reference libraries, and scientific journal...
Quality assurance report - Loch Vale watershed, 1999-2002
Jorin A. Botte, Jill Baron
2004, Open-File Report 2004-1306
The National Park Service initiated the Loch Vale Watershed (LVWS) project in 1980 with funding from the Aquatic Effects Research Program of the National Acid Precipitation Assessment Program. Long-term ecological research and monitoring address watershed-scale ecosystem processes, particularly as they respond to atmospheric deposition and climate variability. Monitoring of meteorological,...
Effect of temporal resolution on the accuracy of ADCP measurements
J. A. Gonzalez-Castro, K. Oberg, James J. Duncker
2004, Conference Paper, Joint Conference on Water Resource Engineering and Water Resources Planning and Management 2000: Building Partnerships
The application of acoustic Doppler current profilers (ADCP's) in river flow measurements is promoting a great deal of progress in hydrometry. ADCP's not only require shorter times to collect data than traditional current meters, but also allow streamflow measurements at sites where the use of conventional meters is either very...
Using stable isotopes to associate migratory shorebirds with their wintering locations in Argentina
A.H. Farmer, M. Abril, M. Fernandez, J. Torres, C. Kester, C. Bern
2004, Ornitologia Neotropical (15) 377-384
We are evaluating the use of stable isotopes to identify the wintering areas of Neotropical migratory shorebirds in Argentina. Our goal is to associate individual birds, captured on the breeding grounds or in migration with specific winter sites, thereby helping to identify distinct areas used by different subpopulations. In January...
Vegetation response to fire and postburn seeding treatments in juniper woodlands of the Grand Staircase-Escalante National Monument, Utah
P. Evangelista, T.J. Stohlgren, D. Guenther, S. Stewart
2004, Western North American Naturalist (64) 293-305
We compared 3 naturally ignited burns with unburned sites in the Grand Staircase-Escalante National Monument. Each burn site was restored with native and nonnative seed mixes, restored with native seeds only, or regenerated naturally. In general, burned sites had significantly lower native species richness (1.8 vs. 2.9 species), native species...
The travel cost method and the economic value of leisure time
Aaron J. Douglas, Richard L. Johnson
2004, International Journal of Tourism Research (6) 365-374
Recent estimates of high values for tourist related recreation USA amenity values indicate that allocation of basic water and terrestrial resources to recreation activities should be given precedence over conventional market oriented activities that often degrade or even extirpate the resource. We discuss at length the travel cost method (TCM),...
American alligator ecology and monitoring for the Comprehensive Everglades Restoration Plan
Kenneth G. Rice, Frank Mazzotti
2004, Fact Sheet 2004-3105
No abstract available at this time...
Temporal and geographic variation in survival of juvenile black brant
David H. Ward, Joel A. Schmutz, James S. Sedinger, Karen S. Bollinger, P. D. Martin, B.A. Anderson
2004, Condor (106) 263-274
First-year survival has important implications for the structure and growth of populations. We examined variation in seasonal survival of first-year Pacific Black Brant (Branta bernicla nigricans) marked late in summer in Alaska at two brood-rearing areas on the Yukon-Kuskokwim Delta (Tutakoke and Kokechik) and one area on the Arctic Coastal...
Contaminants in molting long-tailed ducks and nesting common eiders in the Beaufort Sea
J. C. Franson, Tuula E. Hollmén, Paul L. Flint, J.B. Grand, Richard B. Lanctot
2004, Marine Pollution Bulletin (48) 504-513
In 2000, we collected blood from long-tailed ducks (Clangula hyemalis) and blood and eggs from common eiders (Somateria mollissima) at near-shore islands in the vicinity of Prudhoe Bay, Alaska, and at a reference area east of Prudhoe Bay. Blood was analyzed for trace elements and egg contents were analyzed for...
Tree-ring based reconstructions of interannual to decadal scale precipitation variability for northeastern Utah since 1226 A.D.
S.T. Gray, S.T. Jackson, J.L. Betancourt
2004, Journal of the American Water Resources Association (40) 947-960
Samples from 107 piñon pines (Pinns edulis) at four sites were used to develop a proxy record of annual (June to June) precipitation spanning the 1226 to 2001 AD interval for the Uinta Basin Watershed of northeastern Utah. The reconstruction reveals significant precipitation variability at interannual to decadal scales. Single-year...
Movement, home range, and site fidelity of bluegills in a Great Plains Lake
C.P. Paukert, D.W. Willis, M.A. Bouchard
2004, North American Journal of Fisheries Management (24) 154-161
Little is known about the distribution, movement, and home ranges of bluegills Lepomis macrochirus in lentic environments. Therefore, the objectives of this study were to evaluate the seasonal and diel differences in movement rates, site fidelity, and home range of bluegills in a shallow, natural Great Plains lake. A total...
Exposure to perchlorate induces the formation of macrophage aggregates in the trunk kidney of zebrafish and mosquitofish
T. Capps, S. Mukhi, J.J. Rinchard, C.W. Theodorakis, V. S. Blazer, R. Patino
2004, Journal of Aquatic Animal Health (16) 145-151
Environmental contamination of ground and surface waters by perchlorate, derived from ammonium perchlorate (AP) and other perchlorate salts, is of increasing concern. Exposure to perchlorate can impair the thyroid endocrine system, which is thought to modulate renal and immune function in vertebrates. This study with zebrafish Danio rerio and eastern...
