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Articles 6151 - 6180 of 8909
Full-Text Articles in Entire DC Network
Fearfully And Wonderfully Made, David L. Smith
Fearfully And Wonderfully Made, David L. Smith
Phenomenology Center Books
Contents
Chapter 1: Introduction & The Department's Philosophical Anthropology (p. 15)
Chapter 2: The First Decennial (1959-1969) (p. 29)
Chapter 3: The Second Decennial (1969-1979) (p. 54)
Chapter 4: The Third Decennial ( 1979-1989) (p. 74)
Chapter 5: The Fourth Decennial (1989-1999) (p. 104)
Chapter 6: The New Millennium (1999-2000) (p. 136)
Fact Book 2002-03, Western Michigan University
Fact Book 2002-03, Western Michigan University
Western Michigan University Fact Books
- General Information
- Enrollment Information
- Institutional Comparison
- Student Information
- Faculty Information
- Budgets and Resources
Self -Perception Of Competence And Its Relationship To The Academic Achievement Of Students Attending Middle School, Louis Jr. Cavallo
Self -Perception Of Competence And Its Relationship To The Academic Achievement Of Students Attending Middle School, Louis Jr. Cavallo
All-Inclusive List of Electronic Theses and Dissertations
In 1982, the National Middle School Association published This We Believe, which outlines the general characteristics of developmentally responsive middle schools. The characteristics include interdisciplinary teaching teams, advisory programs, exploratory courses, and expanded extracurricular programs (NMSA, 1982). These middle school components that address affective characteristics were developed, in part, to ensure that adolescents attending middle school are provided with the opportunity to have positive interpersonal relations with an adult advisor, a smaller learning community within the larger school, and opportunities to develop positive peer relations. While developmentally responsive middle schools have an emphasis on the affective characteristics of adolescent development, …
Adobe Medicus 2002 1 January-February, Health Sciences Library And Informatics Center
Adobe Medicus 2002 1 January-February, Health Sciences Library And Informatics Center
adobe medicus
No abstract provided.
Biomphalaria Glabrata Field Isolate (Bb02) Collected For Construction Of Bac Library, Coen Adema
Biomphalaria Glabrata Field Isolate (Bb02) Collected For Construction Of Bac Library, Coen Adema
Biomphalaria Genome Initiative
No abstract provided.
Reproductive Effort, Offspring Size And Benefit/Cost Ratios In The Classification Of Life Histories, Eric Charnov
Reproductive Effort, Offspring Size And Benefit/Cost Ratios In The Classification Of Life Histories, Eric Charnov
Biology Faculty & Staff Publications
There have been many attempts to document links between reproductive allocation and factors such as adult body size and demography. This paper suggests that among closely related taxa, two dimensionless numbers, each a benefit—cost ratio summarizing reproductive timing, allocation and demography, are invariants and thus are useful to classify life histories. The two numbers are E/α and C·E, where E is average adult life span,α is age-at-first-reproduction and C is average mass (per adult) devoted to reproduction per unit of time, divided by the average adult body mass (m); C is usually called reproductive effort'. Since E−1 is the average …
Water And Population In The American West, Denise D. Fort
Water And Population In The American West, Denise D. Fort
Faculty Scholarship
The American West is justly famed for its sunshine and wide skies.1 However, there is a potent combination of low rainfall and growing population in the West that ensures that water, or the lack of it, will remain another well-known feature of the region. As the number of people sharing already stressed water supplies increases, the economic, ecological, and social costs of providing water become more evident. Agriculture consumes about 90% of the water that is extracted in the West, and the transfer from agricultural to municipal and industrial uses is invariably complex. Increased water extraction has resulted in the …
Clemson Graduate School Catalog, 2002-2003, Clemson University
Clemson Graduate School Catalog, 2002-2003, Clemson University
Clemson Graduate Announcements
No abstract provided.
Brown Treesnake Control: Ecomony Of Scales, Daniel S. Vice, Mikel E. Pitzler
Brown Treesnake Control: Ecomony Of Scales, Daniel S. Vice, Mikel E. Pitzler
Human Conflicts with Wildlife: 2002 Symposium
The accidental introduction of the brown treesnake (Boiga irregularis) to Guam led to the demise of most of the island’s native avifauna and herpetofauna. The snake is also responsible for significant economic losses through frequent power outages and consumption of poultry. Control of the snake, aimed at preventing its inadvertent dispersal from the island and protecting native wildlife and economic resources, is accomplished using specially designed snake traps, hand capture, snake detector dogs, and snake barriers. Although control tools capture large numbers of snakes, control efforts are labor intensive, costly, and ineffective in reducing snake populations across the …
Montana Wolf Conservation And Management Planning Document
Montana Wolf Conservation And Management Planning Document
Rocky Mountain Wolf Recovery: Annual Reports
Executive Summary
The State of Montana recognizes the gray wolf as a native species and will integrate wolves as a valuable part of our wildlife heritage. Since 1973, the U.S. Fish and Wildlife Service (USFWS) has managed wolves as an endangered species in Montana, under the authority of the Endangered Species Act (ESA). Wolves are likely to be removed from the endangered species list within 3-5 years. Upon delisting, management authority for wolves will return to Montana Fish, Wildlife & Parks (MFWP). MFWP recognizes and accepts the challenges, responsibilities, and benefits of a restored wolf population. Managing gray wolves will …
Biomineralization Of Poorly Crystalline Fe(Iii) Oxides By Dissimilatory Metal Reducing Bacteria (Dmrb), John M. Zachara, Ravi K. Kukkadapu, James K. Fredrickson, Yuri A. Gorby, Steven C. Smith
Biomineralization Of Poorly Crystalline Fe(Iii) Oxides By Dissimilatory Metal Reducing Bacteria (Dmrb), John M. Zachara, Ravi K. Kukkadapu, James K. Fredrickson, Yuri A. Gorby, Steven C. Smith
United States Department of Energy: Publications
Dissimilatory metal reducing bacteria (DMRB) catalyze the reduction of Fe(III) to Fe(II) in anoxic soils, sediments, and groundwater. Two-line ferrihydrite is a bioavailable Fe(III) oxide form that is exploited by DMRB as a terminal electron acceptor. A wide variety of biomineralization products result from the interaction of DMRB with 2-line ferrihydrite. Here we describe the state of knowledge on the biotransformation of synthetic 2-line ferrihydrite by laboratory cultures of DMRB using select published data and new experimental results. A facultative DMRB is emphasized (Shewanella putrefaciens) upon which most of this work has been performed. Key factors controlling the identity of …
Reduction Kinetics Of Fe(Iii), Co(Iii), U(Vi), Cr(Vi), And Tc(Vii) In Cultures Of Dissimilatory Metal-Reducing Bacteria, Chongxuan Liu, Yuri A. Gorby, John M. Zachara, James K. Fredrickson, Christopher F. Brown
Reduction Kinetics Of Fe(Iii), Co(Iii), U(Vi), Cr(Vi), And Tc(Vii) In Cultures Of Dissimilatory Metal-Reducing Bacteria, Chongxuan Liu, Yuri A. Gorby, John M. Zachara, James K. Fredrickson, Christopher F. Brown
United States Department of Energy: Publications
The reduction kinetics of Fe(III)citrate, Fe(III)NTA, Co(III)EDTA−, U(VI)O22+, Cr(VI)O42−, and Tc(VII)O4− were studied in cultures of dissimilatory metal reducing bacteria (DMRB): Shewanella alga strain BrY, Shewanella putrefaciens strain CN32, Shewanella oneidensis strain MR-1, and Geobacter metallireducens strain GS-15. Reduction rates were metal specific with the following rate trend: Fe (III)citrate ≥ Fe(III)NTA > Co(III)EDTA− ›› UO2 2+ > CrO42− > TcO4−, except for CrO42− when H2 was used as electron donor. The metal reduction rates were also electron donor dependent with faster rates …
Influence Of Mn Oxides On The Reduction Of Uranium(Vi) By The Metal-Reducing Bacterium Shewanella Putrefaciens, James K. Fredrickson, John M. Zachara, David Kennedy, Chongxuan Liu, Martine Duff, Douglas Hunter, Alice Dohnalkova
Influence Of Mn Oxides On The Reduction Of Uranium(Vi) By The Metal-Reducing Bacterium Shewanella Putrefaciens, James K. Fredrickson, John M. Zachara, David Kennedy, Chongxuan Liu, Martine Duff, Douglas Hunter, Alice Dohnalkova
United States Department of Energy: Publications
The potential for Mn oxides to modify the biogeochemical behavior of U during reduction by the subsurface bacterium Shewanella putrefaciens strain CN32 was investigated using synthetic Mn(III/IV) oxides (pyrolusite [β-MnO2], bixbyite [Mn2O3] and K+-birnessite [K4Mn14O27 • 8H2O]). In the absence of bacteria, pyrolusite and bixbyite oxidized biogenic uraninite (UO2[s]) to soluble U(VI) species, with bixbyite being the most rapid oxidant. The Mn(III/IV) oxides lowered the bioreduction rate of U(VI) relative to rates in their absence or in the presence of gibbsite …
Sorption Of Cs+ To Micaceous Subsurface Sediments From The Hanford Site, Usa, John M. Zachara, Steven Smith, Chongxuan Liu, James Mckinley, R. Jeffrey Serne, Paul Gassman
Sorption Of Cs+ To Micaceous Subsurface Sediments From The Hanford Site, Usa, John M. Zachara, Steven Smith, Chongxuan Liu, James Mckinley, R. Jeffrey Serne, Paul Gassman
United States Department of Energy: Publications
The sorption of Cs+ was investigated over a large concentration range (10-9–10-2 mol/L) on subsurface sediments from a United States nuclear materials site (Hanford) where high-level nuclear wastes (HLW) have been accidentally released to the vadose zone. The sediment sorbs large amounts of radiocesium, but expedited migration has been observed when HLW (a NaNO3 brine) is the carrier. Cs+ sorption was measured on homoionic sediments (Na+, K+, Ca2+) with electrolyte concentrations ranging from 0.01 to 1.0 mol/L. In Na+ electrolyte, concentrations were extended to near saturation with …
Synoptic Assessment Of Wetland Function: A Planning Tool For Protection Of Wetland Species Biodiversity, E. William Schweiger, Scott Leibowitz, Jeffrey Hyman, Walt E. Foster, Marla C. Downing
Synoptic Assessment Of Wetland Function: A Planning Tool For Protection Of Wetland Species Biodiversity, E. William Schweiger, Scott Leibowitz, Jeffrey Hyman, Walt E. Foster, Marla C. Downing
United States Environmental Protection Agency: Publications
We present a synoptic assessment intended to maximize the benefits to wetland species biodiversity gained through Clean Water Act regulatory efforts within 225 sub-basins in Missouri, Iowa, Nebraska and Kansas (US Environmental Protection Agency, Region 7), USA. Our assessment provides a method for prioritizing sub-basins potentially critical for supporting wetland species biodiversity and may assist environmental managers and conservationists constrained by limited resources. We prioritize sub-basins based on the projected increase in the risk of wetland species extirpation across Region 7 that would be avoided by applying a unit of regulatory protection effort within a sub-basin. Because the projected increase …
Synoptic Assessment Of Wetland Function: A Planning Tool For Protection Of Wetland Species Biodiversity, E. William Schweiger, Scott G. Leibowitz, Jeffrey B. Hyman, Walt E. Foster, Marla C. Downing
Synoptic Assessment Of Wetland Function: A Planning Tool For Protection Of Wetland Species Biodiversity, E. William Schweiger, Scott G. Leibowitz, Jeffrey B. Hyman, Walt E. Foster, Marla C. Downing
United States Environmental Protection Agency: Publications
We present a synoptic assessment intended to maximize the benefits to wetland species biodiversity gained through Clean Water Act regulatory efforts within 225 sub-basins in Missouri, Iowa, Nebraska and Kansas (US Environmental Protection Agency, Region 7), USA. Our assessment provides a method for prioritizing sub-basins potentially critical for supporting wetland species biodiversity and may assist environmental managers and conservationists constrained by limited resources. We prioritize sub-basins based on the projected increase in the risk of wetland species extirpation across Region 7 that would be avoided by applying a unit of regulatory protection effort within a sub-basin. Because the projected increase …
Using Mussel Isotope Ratios To Assess Anthropogenic Nitrogen Inputs To Freshwater Ecosystems, R. A. Mckinney, J.L. Lake, M. A. Charpentier, S. Ryba
Using Mussel Isotope Ratios To Assess Anthropogenic Nitrogen Inputs To Freshwater Ecosystems, R. A. Mckinney, J.L. Lake, M. A. Charpentier, S. Ryba
United States Environmental Protection Agency: Publications
Stable nitrogen isotope ratios (δ15N) of freshwater mussels from a series of lakes and ponds were related to watershed land use characteristics to assess their utility in determining the source of nitrogen inputs to inland water bodies. Nitrogen isotope ratios measured in freshwater mussels from 19 lakes and ponds in Rhode Island, U.S.A., ranged from 4.9–12.6% and were found to significantly correlate with the fraction of residential development in 100 and 200 m buffer zones around the ponds. Mussel δ15N values in 12 of the 19 ponds also showed significant correlation with average dissolved nitrate concentrations, …
A Pharmacokinetic Model For Estimating Exposure Of Americans To Dioxin-Like Compounds In The Past, Present, And Future, Matthew Lorber
A Pharmacokinetic Model For Estimating Exposure Of Americans To Dioxin-Like Compounds In The Past, Present, And Future, Matthew Lorber
United States Environmental Protection Agency: Publications
Empirical evidence suggests that exposure of Americans to dioxin-like compounds was low during the early decades of the 20th century, then increased during the 1940s and 1950s, reaching a peak in the 1960s and 1970s, and progressively decreased to lower levels in the 1980s and 1990s.Such evidence includes dioxin analysis of carbon-dated sediment cores of lakes and rivers, preserved meat samples from different decades of the 20th century, and limited body burden measurements of dioxin-like compounds. Pinsky and Lorber (1998) summarized studies measuring 2,3,7,8-TCDD in blood and adipose tissue, and found a range of 10–20 pg/g (ppt) lipid during the …
Chemical Contaminants In Juvenile Gray Whales (Eschrichtius Robustus) From A Subsistence Harvest In Arctic Feeding Grounds, Karen L. Tilbury, John E. Stein, Cheryl A. Krone, Robert L. Brownell Jr., S.A. Blokhin, Jennie L. Bolton, Don W. Ernest
Chemical Contaminants In Juvenile Gray Whales (Eschrichtius Robustus) From A Subsistence Harvest In Arctic Feeding Grounds, Karen L. Tilbury, John E. Stein, Cheryl A. Krone, Robert L. Brownell Jr., S.A. Blokhin, Jennie L. Bolton, Don W. Ernest
United States Department of Commerce: Staff Publications
Gray whales are coastal migratory baleen whales that are benthic feeders. Most of their feeding takes place in the northern Pacific Ocean with opportunistic feeding taking place during their migrations and residence on the breeding grounds. The concentrations of organochlorines and trace elements were determined in tissues and stomach contents of juvenile gray whales that were taken on their Arctic feeding grounds in the western Bering Sea during a Russian subsistence harvest. These concentrations were compared to previously published data for contaminants in gray whales that stranded along the west coast of the US during their northbound migration. Feeding in …
Dynamics Of The Lake Michigan Food Web, 1970–2000, Charles P. Madenjian, Gary L. Fahnenstiel, Thomas H. Johengen, Thomas F. Nalepa, Henry A. Vanderploeg, Guy W. Fleischer, Philip J. Schneeberger, Darren M. Benjamin, Emily B. Smith, James R. Bence, Edward S. Rutherford, Dennis S. Lavis, Dale M. Robertson, David J. Jude, Mark P. Ebener
Dynamics Of The Lake Michigan Food Web, 1970–2000, Charles P. Madenjian, Gary L. Fahnenstiel, Thomas H. Johengen, Thomas F. Nalepa, Henry A. Vanderploeg, Guy W. Fleischer, Philip J. Schneeberger, Darren M. Benjamin, Emily B. Smith, James R. Bence, Edward S. Rutherford, Dennis S. Lavis, Dale M. Robertson, David J. Jude, Mark P. Ebener
United States Department of Commerce: Staff Publications
Herein, we document changes in the Lake Michigan food web between 1970 and 2000 and identify the factors responsible for these changes. Control of sea lamprey (Petromyzon marinus) and alewife (Alosa pseudoharengus) populations in Lake Michigan, beginning in the 1950s and 1960s, had profound effects on the food web. Recoveries of lake whitefish (Coregonus clupeaformis) and burbot (Lota lota) populations, as well as the buildup of salmonine populations, were attributable, at least in part, to sea lamprey control. Based on our analyses, predation by salmonines was primarily responsible for the reduction in …
Dispersal And Emerging Ecological Impacts Of Ponto-Caspian Species In The Laurentian Great Lakes, Henry A. Vanderploeg, Thomas F. Nalepa, David J. Jude, Edward L. Mills, Kristen T. Holeck, James R. Liebig, Igor A. Grigorovich, Henn Ojaveer
Dispersal And Emerging Ecological Impacts Of Ponto-Caspian Species In The Laurentian Great Lakes, Henry A. Vanderploeg, Thomas F. Nalepa, David J. Jude, Edward L. Mills, Kristen T. Holeck, James R. Liebig, Igor A. Grigorovich, Henn Ojaveer
United States Department of Commerce: Staff Publications
We describe, explain, and “predict” dispersal and ecosystem impacts of six Ponto-Caspian endemic species that recently invaded the Great Lakes via ballast water. The zebra mussel, Dreissena polymorpha, and quagga mussel, Dreissena bugensis, continue to colonize hard and soft substrates of the Great Lakes and are changing ecosystem function through mechanisms of ecosystem engineering (increased water clarity and reef building), fouling native mussels, high particle filtration rate with selective rejection of colonial cyanobacteria in pseudofeces, alteration of nutrient ratios, and facilitation of the rapid spread of their Ponto-Caspian associates, the benthic amphipod Echinogammarus ischnus and the round goby, …
A New Class Of Lipid Desaturase Central To Sphingolipid Biosynthesis And Signalling, Johnathan A. Napier, Louise V. Michaelson, Teresa M. Dunn
A New Class Of Lipid Desaturase Central To Sphingolipid Biosynthesis And Signalling, Johnathan A. Napier, Louise V. Michaelson, Teresa M. Dunn
Uniformed Services University of the Health Sciences
Sphingolipids and their phosphorylated metabolites play crucial roles in intracellular signaling in animals, and evidence is emerging for analogous situations in fungi and plants. Central to this signaling pathway is the phosphorylation of the sphingoid long chain base, sphingosine, which yields sphingosine-1-phosphate. Until recently, the enzyme responsible for the biosynthesis of sphingosine was unknown, but the Δ4-long chain base desaturase that carries out this reaction has now been identified. Orthologues are present in animals, plants and fungi, raising the possibility of using reverse genetics to determine the contribution of sphingosine-1-phosphate to signaling networks.
A Saccharomyces Cerevisiae Gene Required For Heterologous Fatty Acid Elongase Activity Encodes A Microsomal Β-Keto-Reductase, Frédéric Beaudoin, Ken Gable, Olga Sayanova, Teresa Dunn, Johnathan A. Napier
A Saccharomyces Cerevisiae Gene Required For Heterologous Fatty Acid Elongase Activity Encodes A Microsomal Β-Keto-Reductase, Frédéric Beaudoin, Ken Gable, Olga Sayanova, Teresa Dunn, Johnathan A. Napier
Uniformed Services University of the Health Sciences
A number of Saccharomyces cerevisiae membranebound oxidoreductases were examined for potential roles in microsomal fatty acid elongation, by assaying heterologous elongating activities in individual deletion mutants. One yeast gene, YBR159w, was identified as being required for activity of both the Caenorhabditis elegans elongase PEA1 (F56H11.4) and the Arabidopsis thaliana elongase FAE1. Ybr159p shows some limited homology to human steroid dehydrogenases and is a member of the short-chain alcohol dehydrogenase superfamily. Disruption of YBR159w is not lethal, in contrast to previous reports, although the mutants are slow growing and display high temperature sensitivity. Both …
The Saccharomyces Cerevisiae Ybr159w Gene Encodes The 3-Ketoreductase Of The Microsomal Fatty Acid Elongase, Gongshe Han, Ken Gable, Sepp D. Kohlwein, Frédéric Beaudoin, Johnathan A. Napier, Teresa M. Dunn
The Saccharomyces Cerevisiae Ybr159w Gene Encodes The 3-Ketoreductase Of The Microsomal Fatty Acid Elongase, Gongshe Han, Ken Gable, Sepp D. Kohlwein, Frédéric Beaudoin, Johnathan A. Napier, Teresa M. Dunn
Uniformed Services University of the Health Sciences
The YBR159w gene encodes the major 3-ketoreductase activity of the elongase system of enzymes required for very long-chain fatty acid (VLCFA) synthesis. Mutants lacking the YBR159w gene display many of the phenotypes that have previously been described for mutants with defects in fatty acid elongation. These phenotypes include reduced VLCFA synthesis, accumulation of high levels of dihydrosphingosine and phytosphingosine, and accumulation of medium-chain ceramides. In vitro elongation assays confirm that the ybr159Δ mutant is deficient in the reduction of the 3-ketoacyl intermediates of fatty acid elongation. The ybr159Δ mutant also displays reduced dehydration of the 3-OH acyl intermediates of fatty …
Cell Surface-Localized Nucleolin Is A Eukaryotic Receptor For The Adhesin Intimin-Γ Of Enterohemorrhagic Escherichia Coli O157:H7, James F. Sinclair, Alison D. O'Brien
Cell Surface-Localized Nucleolin Is A Eukaryotic Receptor For The Adhesin Intimin-Γ Of Enterohemorrhagic Escherichia Coli O157:H7, James F. Sinclair, Alison D. O'Brien
Uniformed Services University of the Health Sciences
Intimin-γ is an outer membrane protein of enterohemorrhagic Escherichia coli (EHEC) O157:H7 that is required for the organism to adhere tightly to HEp-2 cells and to colonize experimental animals. Another EHEC O157:H7 protein, the Transferred intimin receptor (Tir), is considered the primary receptor for intimin-γ. Nevertheless, Tir-independent binding of intimin-γ to HEp-2 cells has been reported. This observation suggests the existence of a eukaryotic receptor(s) for intimin-γ. In this study, we sought to identify that receptor(s). First, we determined by equilibrium binding titration that the association of purified intimin-γ with HEp-2 cells was specific and consistent …
Tws Wildlife Damage Management Working Group Newsletter: Summer 2002 – Volume 9(2)
Tws Wildlife Damage Management Working Group Newsletter: Summer 2002 – Volume 9(2)
TWS Wildlife Damage Management Working Group Newsletter
Forward; Wanted: Information On Management Of Coyotes In Urban/Suburban Locals; Candidates For The Working Group Officers – July 2002; Wildlife Damage Management Working Group Ballot – July 2002; Book Review - Resolving Human-Wildlife Conflicts: The Science Of Wildlife Damage Management
Holocene Multidecadal And Multicentennial Droughts Affecting Northern California And Nevada, Larry Benson, Michaele Kashgarian, Robert Rye, Steve Lund, Fred Paillet, Joseph Smoot, Cynthia Kester, Scott Mensing, Dave Meko, Susan Landström
Holocene Multidecadal And Multicentennial Droughts Affecting Northern California And Nevada, Larry Benson, Michaele Kashgarian, Robert Rye, Steve Lund, Fred Paillet, Joseph Smoot, Cynthia Kester, Scott Mensing, Dave Meko, Susan Landström
United States Geological Survey: Staff Publications
Continuous, high-resolution δ18O records from cored sediments of Pyramid Lake, Nevada, indicate that oscillations in the hydrologic balance occurred, on average, about every 150 years (yr) during the past 7630 calendar years (cal yr). The records are not stationary; during the past 2740 yr, drought durations ranged from 20 to 100 yr and intervals between droughts ranged from 80 to 230 yr. Comparison of tree-ring-based reconstructions of climate change for the past 1200 yr from the Sierra Nevada and the El Malpais region of northwest New Mexico indicates that severe droughts associated with Anasazi withdrawal from Chaco Canyon …
Parasitism Of Cidia Spp. (Lepidoptera: Tortricidae) On Sophora Chrysophylla (Fabaceae) Along An Elevation Gradient Of Dry Subalpine Forest On Mauna Kea, Hawaii, Gregory J. Brenner, Peter T. Oboyski, Paul C. Banko
Parasitism Of Cidia Spp. (Lepidoptera: Tortricidae) On Sophora Chrysophylla (Fabaceae) Along An Elevation Gradient Of Dry Subalpine Forest On Mauna Kea, Hawaii, Gregory J. Brenner, Peter T. Oboyski, Paul C. Banko
United States Geological Survey: Staff Publications
The biology and ecological importance of Hawaiian endemic Cydia spp. (Lepidoptera: Tortricidae) are poorly known. Cydia larvae arc an important food to palila, an endangered Hawaiian bird that inhabits Sophora woodlands on Mauna Kea, Hawaii. We quantified Cydia larval abundance in seeds of Sophora chrysophylla Salisbury (Fabaceae) and larval mortality caused by parasitism. Four new host plant associations are reported: C. crassicornis [Walsingham], C. fulsifalcella [Walsingham], C. obliqlla [Walsingham], and C. storeella [Walsingham]. Four parasitoid wasp species were consistently reared from larval Cydia: Calliephialtes grapholithae [Cresson], Diadegma blackburni [Cameron], Pristomerus hawaiiensis Perkins (Hymenoptera: Ichneumonidae), and Euderus metallicus [Ashmead] (Hymenoptera: …
Conditions And Limitations On Learning In The Adaptive Management Of Mallard Harvests, Fred A. Johnson, William L. Kendall, James A. Dubovsky
Conditions And Limitations On Learning In The Adaptive Management Of Mallard Harvests, Fred A. Johnson, William L. Kendall, James A. Dubovsky
United States Geological Survey: Staff Publications
In 1995, the United States Fish and Wildlife Service adopted a protocol for the adaptive management of waterfowl hunting regulations (AHM) to help reduce uncertainty about the magnitude of sustainable harvests. To date, the AHM process has focused principally on the midcontinent population of mallards (Anas platyrhynchos), whose dynamics are described by 4 alternative models. Collectively, these models express uncertainty (or disagreement) about whether harvest is an additive or a compensatory form of mortality and whether the reproductive process is weakly or strongly density-dependent. Each model is associated with a probability or "weight," which describes its relative ability …
Review Of The Background And Application Of Triolein-Containing Semipermeable Membrane Devices In Aquatic Environmental Study, Yibing Lu, Zijian Wang, James Huckins
Review Of The Background And Application Of Triolein-Containing Semipermeable Membrane Devices In Aquatic Environmental Study, Yibing Lu, Zijian Wang, James Huckins
United States Geological Survey: Staff Publications
This paper briefly reviews research on passive in situ samplers for aquatic environments but focuses on the development and application of the triolein-containing semipermeable membrane device in aquatic environmental monitoring. Special attention is paid to the calibration of the devices, quality control issues, and its potential uses in environmental assessments of aquatic contaminants. Also, the suitability of the technique for incorporation with selected bioassays is examined.