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Page 2542, results 63526 - 63550

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Not all publications have extents, not all extents are completely accurate
The Program for Regional and International Shorebird Monitoring (PRISM)
J. Bart, B. Andres, S. Brown, G. Donaldson, B. Harrington, V. Johnston, S. Jones, R. I. G. Morrison, S. K. Skagen
2005, General Technical Report PSW-GTR-191
This report describes the "Program for Regional and International Shorebird Monitoring" (PRISM). PRISM is being implemented by a Canada-United States Shorebird Monitoring and Assessment Committee formed in 2001 by the Canadian Shorebird Working Group and the U.S. Shorebird Council. PRISM provides a single blueprint for implementing the shorebird conservation plans...
Lake whitefish and Diporeia spp. in the Great lakes: an overview
Thomas F. Nalepa, Lloyd C. Mohr, Bryan A. Henderson, Charles P. Madenjian, Philip J. Schneeberger
2005, Technical Report 66
Because of growing concern in the Great Lakes over declines in abundance and growth of lake whitefish (Coregonus clupeaformis) and declines in abundance of the benthic amphipod Diporeia spp., a workshop was held to examine past and current trends, to explore trophic links, and to discuss the latest research results...
A retrospective perspective: evaluating population changes by repeating historic bird surveys
Lawrence D. Igl, Douglas H. Johnson
2005, General Technical Report GTR-PSW-191
Acquiring an accurate picture of the changes in bird populations often involves a tradeoff between the time and effort required to complete the surveys and the number of years spent surveying the bird populations. An alternative approach to long-term monitoring efforts is to collect current data and contrast those with...
Bufo exsul (Myers, 1942): Black toad
Gary M. Fellers
Michael Lannoo, editor(s)
2005, Book chapter, Amphibian declines: The conservation status of United States species
No abstract available....
Assessing mercury exposure and effects to American dippers in headwater streams near mining sites
Charles J. Henny, James L. Kaiser, Heidi A. Packard, Robert A. Grove, Mike R. Taft
2005, Ecotoxicology (14) 709-725
To evaluate mercury (Hg) exposure and possible adverse effects of Hg on American dipper (Cinclus mexicanus) reproduction, we collected eggs and nestling feathers and the larval/nymph form of three Orders of aquatic macroinvertebrates (Ephemeroptera, Plecoptera and Trichoptera = EPT) important in their diet from three major headwater tributaries of the upper Willamette...
Factors influencing the sporulation and cyst formation of Aphanomyces invadans, etiological agent of ulcerative mycosis in Atlantic menhaden, Brevoortia tyrannus
Y. Kiryu, Vicki S. Blazer, W. K. Vogelbein, H. Kator, J. D. Shields
2005, Mycologia (97) 569-575
Oomycete infections caused by Aphanomyces invadans occur in freshwater and estuarine fishes around the world. Along the east coast of the USA, skin ulcers caused by A. invadans are prevalent in Atlantic menhaden, Brevoortia tyrannus. From laboratory observations low salinities appear crucial to transmission of the pathogen. To better understand aspects of transmission, we characterized sporulation...
Catch rates relative to angler party size with implications for monitoring angler success
L.E. Miranda
2005, Transactions of the American Fisheries Society (134) 1005-1010
Angler catch rates often are used to monitor angler success, assess the need for additional management actions, and evaluate the effectiveness of management practices. Potential linkages between catch rate and angler party size were examined to assess how party size might affect the use of catch rate as an index...
Geography of spring landbird migration through riparian habitats in southwestern North America
S. K. Skagen, J.F. Kelly, Charles van Riper III, R.L. Hutto, D.M. Finch, D.J. Krueper, Cynthia Melcher
2005, The Condor (107) 212-227
Migration stopover resources, particularly riparian habitats, are critically important to landbirds migrating across the arid southwestern region of North America. To explore the effects of species biogeography and habitat affinity on spring migration patterns, we synthesized existing bird abundance and capture data collected in riparian habitats of the borderlands region...
Trophic transfer of metals along freshwater food webs: Evidence of cadmium biomagnification in nature
M.-N. Croteau, S. N. Luoma, A.R. Stewart
2005, Limnology and Oceanography (50) 1511-1519
We conducted a study with cadmium (Cd) and copper (Cu) in the delta of San Francisco Bay, using nitrogen and carbon stable isotopes to identify trophic position and food web structure. Cadmium is progressively enriched among trophic levels in discrete epiphyte‐based food webs composed of macrophyte‐dwelling invertebrates...
Mortality in the endangered Laysan teal, Anas laysanensis: conservation implications
M.H. Reynolds, Thierry M. Work
2005, Wildfowl (55) 29-46
The Laysan Teal Anas laysanensis is an endangered anatid of the Hawaiian Islands, currently restricted to an emergent atoll, Laysan Island. Laysan Island lacks terrestrial mammalian predators, which permits the examination of mortality rates and causes without the anthropogenic effects of introduced predators. Mass and morophometrics were measured during the...
Exertional myopathy in whooping cranes (Grus americana) with prognostic guidlelines
C. S. Hanley, Nancy J. Thomas, Joanne R. Paul-Murphy, Barry K. Hartup
2005, Journal of Zoo and Wildlife Medicine (36) 489-497
Exertional myopathy developed in three whooping cranes (Grus americana) secondary to routine capture, handling, and trauma. Presumptive diagnosis of exertional myopathy was based on history of recent capture or trauma, clinical signs, and elevation of aspartate aminotransferase, alanine aminotransferase, creatine kinase, lactate dehydrogenase, and serum potassium. Treatments were attempted...
Monitoring temporal change in riparian vegetation of Great Basin National Park
Erik A. Beever, David A. Pyke, Jeanne C. Chambers, Fred Landau, S.D. Smith
2005, Western North American Naturalist (65) 382-402
Disturbance in riparian areas of semiarid ecosystems involves complex interactions of pulsed hydrologic flows, herbivory, fire, climatic effects, and anthropogenic influences. We resampled riparian vegetation within ten 10-m × 100-m plots that were initially sampled in 1992 in 4 watersheds of the Snake Range, east central Nevada. Our finding of...
Nowcast modeling of Escherichia coli concentrations at multiple urban beaches of southern Lake Michigan
Meredith B. Nevers, Richard L. Whitman
2005, Water Research (39) 5250-5260
Predictive modeling for Escherichia coli concentrations at effluent-dominated beaches may be a favorable alternative to current, routinely criticized monitoring standards. The ability to model numerous beaches simultaneously and provide real-time data decreases cost and effort associated with beach monitoring. In 2004, five Lake Michigan beaches and the nearby Little Calumet River outfall...
Integrated fire science in the Rocky Mountains
Natasha B. Kotliar
2005, Fact Sheet 2005-3032
Fire is an important ecological process that has helped shape western landscapes. Wildfire suppression and other management practices may have altered historic fire regimes in ecosystems adapted to frequent, low-severity fires. Compounding this problem is the encroachment of homes into fire-prone areas. Fire affects a number of abiotic and biotic components...
Does choice of estimators influence conclusions from true metabolizable energy feeding trials?
M. H. Sherfy, R. L. Kirkpatrick, K. E. Webb Jr.
2005, Journal of Ornithology (146) 383-389
True metabolizable energy (TME) is a measure of avian dietary quality that accounts for metabolic fecal and endogenous urinary energy losses (EL) of non-dietary origin. The TME is calculated using a bird fed the test diet and an estimate of EL derived from another bird (Paired Bird Correction), the same...
The value of agricultural wetlands as invertebrate resources for wintering shorebirds
Oriane W. Taft, Susan M. Haig
2005, Agriculture, Ecosystems and Environment (110) 249-256
Agricultural landscapes have received little recognition for the food resources they provide to wintering waterbirds. In the Willamette Valley of Oregon, modest yet significant populations of wintering shorebirds (Charadriiformes) regularly use hundreds of dispersed wetlands on agricultural lands. Benthic invertebrates are a critical resource for the survival of overwintering shorebirds,...
Role of lake-wide prey fish survey in understanding ecosystem dynamics and managing fisheries of Lake Michigan
Charles P. Madenjian
T. Edsall, M. Munawar, editor(s)
2005, Book chapter, State of Lake Michigan: Ecology, Health, and Management
With this study, the role of this lake-wide prey fish survey in both understanding the dynamics of the Lake Michigan ecosystem and managing Lake Michigan fisheries was documented. The complexity of ecosystems is such that long-term study is required before the dynamics of the ecosystem can be understoond....