Efficiently estimating salmon escapement uncertainty using systematically sampled data
Joel H. Reynolds, Carol Ann Woody, Nancy E. Gove, Lowell F. Fair
2007, American Fisheries Society Symposium (54) 121-129
Fish escapement is generally monitored using nonreplicated systematic sampling designs (e.g., via visual counts from towers or hydroacoustic counts). These sampling designs support a variety of methods for estimating the variance of the total escapement. Unfortunately, all the methods give biased results, with the magnitude of the bias being determined...
Adjusting for telemetry bias in behavior data
Mark S. Udevitz, Chadwick V. Jay, Anthony S. Fischbach, Joel L. Garlich-Miller
2007, Conference Paper, Proceedings of the Annual Meeting of the Alaska Chapter of the American Statistical Association
No abstract available. ...
Signatures of mountain building: Detrital zircon U/Pb ages from northeast Tibet
Richard O. Lease, Douglas W. Burbank, George E. Gehrels, Zhicai Wang, Daoyang Yuan
2007, Geology (35) 239-242
Although detrital zircon has proven to be a powerful tool for determining provenance, past work has focused primarily on delimiting regional source terranes. Here we explore the limits of spatial resolution and stratigraphic sensitivity of detrital zircon in ascertaining provenance, and we demonstrate its ability to detect source changes for...
New technologies at the Desert Research Institute make a difference in wildland fire management
Timothy J. Brown, Crystal A. Kolden
2007, Wildland Firefighter (11) 28-32
No abstract available....
The blind men and the elephant: Concerns about the use of juvenile proportion data
Brian J. McCaffery, Colleen M. Handel, Robert E. Gill Jr., Daniel R. Ruthrauff
2007, Stilt - The journal for the East Asian-Australasian Flyway (50) 194-204
Juvenile proportion data in shorebirds are being used with increasing frequency to estimate recruitment and even breeding success. Although this area of investigation holds great promise, flaws in current study designs preclude great confidence in the broad-scale inferences being drawn. We present data from our own investigations on juvenile proportions...
Fire risk in San Diego County, California: A weighted Bayesian model approach
Crystal A. Kolden, Timothy J. Weigel
2007, California Geographer (47) 42-60
Fire risk models are widely utilized to mitigate wildfire hazards, but models are often based on expert opinions of less understood fire-ignition and spread processes. In this study, we used an empirically derived weights-of-evidence model to assess what factors produce fire ignitions east of San Diego, California. We created and...
Concordance of nuclear and mitochondrial DNA markers in detecting a founder event in Lake Clark sockeye salmon
Kristina M. Ramstad, Carol Ann Woody, Chris Habicht, G. Kevin Sage, James E. Seeb, Fred W. Allendorf
2007, American Fisheries Society Symposium (54) 31-50
Genetic bottleneck effects can reduce genetic variation, persistence probability, and evolutionary potential of populations. Previous microsatellite analysis suggested a bottleneck associated with a common founding of sock-eye salmon Oncorhynchus nerka populations of Lake Clark, Alaska, about 100 to 400 generations ago. The common foundingevent occurred after the last glacial recession...
Inventory of montane-nesting birds in Katmai and Lake Clark national parks and preserves
Daniel R. Ruthrauff, T. Lee Tibbitts, Robert E. Gill Jr., Colleen M. Handel
2007, Report
As part of the National Park Service’s Inventory and Monitoring Program, biologists from the U. S. Geological Survey’s Alaska Science Center conducted an inventory of birds in montane regions of Katmai and Lake Clark National Parks and Preserves during 2004–2006. We used a stratified random survey design to allocate samples...
Geologic map of the Siksikpuk River area, Chandler Lake quadrangle, Alaska
P.R. Peapples, W. K. Wallace, Marwan A. Wartes, R.F. Swenson, C. G. Mull, Julie A. Dumoulin, E. E. Harris, E.S. Finzel, R.R. Reifenstuhl, A.M. Loveland
2007, Report
Tower counts
Carol Ann Woody
2007, Book chapter, Salmonid Field Protocols Handbook: Techniques for Assessing Status and Trends in Salmon and Trout Populations
Counting towers provide an accurate, low-cost, low-maintenance, low-technology, and easily mobilized escapement estimation program compared to other methods (e.g., weirs, hydroacoustics, mark-recapture, and aerial surveys) (Thompson 1962; Siebel 1967; Cousens et al. 1982; Symons and Waldichuk 1984; Anderson 2000; Alaska Department of Fish and Game 2003). Counting tower data has...
Chronic Wasting Disease
Bryan Richards
2007, Fact Sheet 2007-3070
Chronic wasting disease (CWD) is an always-fatal, neurological illness occurring in North American cervids (members of the deer family), including white-tailed deer, mule deer, elk and moose. Since its discovery in 1967, CWD has spread geographically and increased in prevalence locally. CWD is contagious; it can be transmitted freely within...
Climate matching as a tool for predicting potential North American spread of Brown Treesnakes
Gordon H. Rodda, Robert N. Reed, Catherine S. Jarnevich
G.W. Witmer, W. C. Pitt, K.A. Fagerstone, editor(s)
2007, Conference Paper, Managing Vertebrate Invasive Species – Proceedings of a Symposium
Climate matching identifies extralimital destinations that could be colonized by a potential invasive species on the basis of similarity to climates found in the species’ native range. Climate is a proxy for the factors that determine whether a population will reproduce enough to offset mortality. Previous climate matching models (e.g.,...
Assessment of marine-derived nutrients in the Copper River Delta, Alaska, using natural abundance of the stable isotopes of nitrogen, sulfur, and carbon
Thomas C. Kline, Carol Ann Woody, Mary Anne Bishop, Sean P. Powers, E. Eric Knudsen
2007, American Fisheries Society Symposium (54) 51-60
We performed nitrogen, sulfur, and carbon stable isotope analysis (SIA) on maturing and juvenile anadromous sockeye and coho salmon, and periphyton in two Copper River delta watersheds of Alaska to trace salmonderived nutrients during 2003–2004. Maturing salmon were isotopically enriched relative to alternate freshwater N, S, and C sources as...
Holocene slip rate and revised characteristic earthquake parameters for the western segment of the Castle Mountain fault, Alaska
Julie B. Willis, Peter J. Haeussler, Ronald L. Bruhn, Grant C. Willis
2007, Bulletin of the Seismological Society of America (97) 1019-1024
The western segment of the Castle Mountain fault poses a significant seismic hazard to the most populated region of south-central Alaska. We identify a previously unrecognized margin of a postglacial outwash channel that is offset right laterally 36 ± 4 m across the western segment of the Castle Mountain fault....
Temporal and spatial variability in stable isotope compositions of a freshwater mussel: Implications for biomonitoring and ecological studies
L. Gustafson, W. Showers, T. Kwak, J. Levine, M. Stoskopf
2007, Oecologia (152) 140-150
Stable isotopes can be used to elucidate ecological relationships in community and trophic studies. Findings are calibrated against baselines, e.g. from a producer or primary consumer, assumed to act as a reference to the isotopic context created by spatio-temporal attributes such as geography, climate, nutrient, and energy sources. The ability...
Laboratory evaluation of predator avoidance ability, tag loss, and tissue response of acoustic-tagged juvenile salmonids: Draft Annual Report of Research 2006
T.L. Liedtke, L.P. Gee, M.G. Mesa, J.W. Beeman, D.G. Elliott, C. M. Conway
2007, Report
n/a...
USGS national surveys and analysis projects: Preliminary compilation of integrated geological datasets for the United States: A section in Digital mapping techniques '06 - Workshop proceedings
Suzanne W. Nicholson, Douglas B. Stoeser, Frederic H. Wilson, Connie L. Dicken, Stephen Ludington
2007, Open-File Report 2007-1285
The growth in the use of Geographic Information Systems (GIS) has highlighted the need for regional and national digital geologic maps attributed with age and rock type information. Such spatial data can be conveniently used to generate derivative maps for purposes that include mineral-resource assessment, metallogenic studies, tectonic studies, human...
USGS National Wildlife Health Center's Quarterly Wildlife Mortality Report (North America)
M. Jankowski, K. Schuler, J. Bradsby
2007, Supplement to the Journal of Wildlife Diseases (43)
Contaminated salmon and the public's trust
Samuel N. Luoma, Ragnar E. Lofstedt
2007, Environmental Science & Technology (41) 1811-1814
Scientific uncertainties often make it difficult for environmental policy makers to determine how to communicate risks to the public. A constructive, holistic, multisectoral dialogue about an issue can improve understanding of uncertainties from different perspectives and clarify options for risk communication. Many environmental issues could benefit from explicit promotion of...
Biological effects of anthropogenic contaminants in the San Francisco Estuary
B. Thompson, T. Adelsbach, Cynthia L. Brown, J. Hunt, James S. Kuwabara, J. Neale, H. Ohlendorf, Steven E. Schwarzbach, R. Spies, K. Taberski
2007, Environmental Research (105) 156-174
Concentrations of many anthropogenic contaminants in the San Francisco Estuary exist at levels that have been associated with biological effects elsewhere, so there is a potential for them to cause biological effects in the Estuary. The purpose of this paper is to...
USGS National Wildlife Health Center's Quarterly Mortality Report
K. A. Converse, G. McLaughlin
2007, Supplement to the Journal of Wildlife Diseases (43)
Aspergillosis
Kathryn A. Converse
Nancy J. Thomas, D. Bruce Hunter, Carter T. Atkinson, editor(s)
2007, Book chapter, Infectious diseases of wild birds
This chapter contains section titled:IntroductionSynonymsHistoryDistributionHost RangeEtiologyEpizootiologyClinical SignsPathogenesis and PathologyDiagnosisImmunityPublic Health ConcernsDomestic Animal Health ConcernsWildlife Population ImpactsTreatment and ControlUnpublished DataLiterature Cited...
Appropriate postfire management for the 2007 Griffith park Fire
Jon E. Keeley
2007, Newsletter of the Los Angeles & San Gabriel Rivers Watershed Council (11) 3-5
No abstract available....
Efficacy of CPTH-treated egg baits for removing ravens
Peter S. Coates, Jack O. Spencer Jr., David J. Delehanty
2007, Human-Wildlife Conflicts (1) 224-234
Human-altered landscapes have provided resource subsidies for common ravens (Corvus corax) resulting in a substantial increase in raven abundance and distribution throughout the United States and Canada in the past 25 years. Ravens are effective predators of eggs and young of ground-nesting birds. During 2002–2005, we tested whether chicken egg baits...
Nitrification in the euphotic zone as evidenced by nitrate dual isotopic composition: Observations from Monterey Bay, California
Scott D. Wankel, Carol Kendall, J.T. Pennington, Francisco P. Chavez, Adina Paytan
2007, Global Biogeochemical Cycles (21)
Coupled measurements of nitrate (NO3−), nitrogen (N), and oxygen (O) isotopic composition (δ15NNO3 and δ18ONO3) were made in surface waters of Monterey Bay to investigate multiple N cycling processes occurring within surface waters. Profiles collected throughout the year at three sites exhibit a wide range of values, suggesting simultaneous...
