Academic performance of student athletes is an of interest topic in the current climate of rising university athletics expenses. This project academic population of Oregon State University student athletes with that of the general undergraduate population using grade point averages (GPA). Samples were compared using team, gender, college, and sport...
We find contagion effects are present in US small size portfolios during emerging market crises due to risk and liquidity concerns. Investors display flight from risk during emerging market crises, and as a result, safer larger stocks exhibit positive abnormal returns. We find little evidence of contagion in aggregate excess...
We extend the Pukthuanthong and Roll (2009) measure of integration to provide an estimate of systemic risk within international equity markets. Our measure indicates an increasing likelihood of market crashes. The conditional probability of market crashes increases substantially following increases of our risk measure. High levels of our risk measure...
Economists have long recognized the importance of information veracity in valuing risky securities. Market participants concerned about the credibility of information measures may require additional compensation to entice them to hold stocks with less transparent information. These same securities are expected to display greater sensitivities to measures of market sentiment....
Mark-recapture methods were used to examine watershed-scale survival rates of coastal cutthroat trout (Oncorhynchus clarkii clarkii) from two headwater stream networks located in the foothills of the Cascade Mountain Range, Oregon. Differences in survival were explored among spatial (stream segment, stream network [main stem or tributaries], and watershed) and temporal...
Background: When conducting research with American Indian tribes, informed consent beyond conventional institutional review board (IRB) review is needed because of the potential for adverse consequences at a community or governmental level that are unrecognized by academic researchers. Objectives: In this article, we review sovereignty, research ethics, and data-sharing considerations...
Plant form is a compromise between resource gathering, reproduction and
the tolerance to physical demands of the abiotic and biotic environment. In
an agricultural field in addition to the natural factors causing stress, humans
also introduce physical and mechanical stresses, and chemical pesticides
into the environment. Many of these factors...
Rapid rates of biodiversity loss have supported the notion that Earth is experiencing a sixth major extinction event. The causes of worldwide biodiversity loss are multifaceted and context dependent. One of the most prominent groups experiencing population declines and extinctions are amphibians. Several pathogens and their associated diseases are especially...
The response of sweet corn Zea mays L. var. rugosa (cultivar
'Jubilee') to row spacing, nitrogen and population density at two
planting dates was studied in a field experiment at the OSU
Vegetable Research Farm in 1984. Variables included two row
spacings, 75 cm and 90 cm, three nitrogen rates,...
Quantitative habitat models of wildlife-habitat relationships are developed to
formalize our current understanding about an ecological system. A habitat
association model is one of these models that is useful for answering questions
about how the habitat is occupied, how much growth habitat is required by the
animal, or how the...
The last century has experienced a marked increase in emerging infectious disease (EID, hereafter) – jeopardizing human, domestic animal, and wildlife health. EIDs are commonly associated with spillover from one host species into a novel host species, with many destructive diseases, for both livestock and wildlife, emerging at the wildlife-livestock...
Natural resource data are typically non-linear and complex, yet modeling methods often utilize statistical analysis techniques, such as regression, that are insufficient for use on such data. This research proposes an innovative modeling method based on pattern recognition techniques borrowed from the field of machine learning. These techniques make no...
As the global demand for natural resources increases, more land will be intensively managed for the production of commodities such as timber, with potential consequences to biodiversity, ecological functioning and ecosystem services provided to society. Although there is strong consensus that intensive land management practices can negatively affect biodiversity, less...
Whey protein’s potential for bioactivity is well documented, but there is disagreement on the extent to which it may modulate the immune system towards decreased inflammation. Decreased inflammation is generally perceived as a beneficial bioactivity in foods as excessive chronic inflammation is linked to morbidity and mortality.
This thesis first...
Mycosphaerella graminicola (anamorph Septoria tritici) causes Septoria tritici blotch, a globally important disease of winter wheat. Resistance and pathogenicity generally vary quantitatively. The pathogen reproduces both sexually and asexually, and the pathogen population is highly genetically variable. Several unresolved questions about the epidemiology of this pathosystem are addressed by this...
Background: The aim was to investigate possible associations between glioma (an aggressive type of brain cancer) and occupational exposure to selected agents: combustion products (diesel and gasoline exhaust emissions, benzo (a) pyrene), dusts (animal dust, asbestos, crystalline silica, wood dust) and some other chemical agents (formaldehyde, oil mist, sulphur dioxide)....
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
Piscivory by birds can be significant, particularly on fish in small streams and during seasonal low flow when available cover from predators can be limited. Yet, how varying amounts of cover may change the extent of predation mortality from avian predators on fish is not clear. We evaluated size-selective survival...
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
Contemporary environmental change encompasses massive biodiversity loss and
increasing numbers of emerging diseases worldwide. As part of a global biodiversity
crisis, amphibians are disappearing at unprecedented rates. Batrachochytrium
dendrobatidis is an emerging infectious pathogen prominently associated with many
declines. Chapter 1 reviews the past decade of research on this system...
The OSU Government Relations Office provides periodic updates that describe events in Washington, DC and Salem. These updates include insights on how budget and policy decisions at the state and federal level will affect OSU and are issued once or twice a month, depending on the level of activities in...
Holocene bulk sediment and component accumulation rates were
measured in twenty-eight piston and gravity cores taken from the
floor of the western Panama Basin and on the surrounding ridges.
Radiocarbon ages and oxygen isotope curves provided Holocene age
control in nine cores. Time datums in nineteen other cores were
inferred...
This dissertation uses manipulative experiments to explore amphibian-Bd infection dynamics. Although there has been almost two decades research since the discovery of Bd, many questions still remain regarding what conditions mediate chytridiomycosis virulence. My research shows how certain host and pathogen factors can influence disease virulence. Identifying how host and...
Emerging infectious diseases are increasing globally and are a threat to human, wildlife, and ecosystem health. The emerging fungal pathogen, Batrachochytrium dendrobatidis (Bd), or amphibian chytrid fungus, is associated with worldwide amphibian population declines and extinctions. Bd has been found on every continent where amphibians exist and has been documented...
This study examined the culture of Earth First!, an environmental
activist movement. The study was limited to two groups of Earth
First! in the Northwest, Corvallis and Eugene. The goal was to
discover what it is to be a communicatively competent member of Earth
First! The method used to address...
The earth is undergoing a “biodiversity crisis” characterized by loss of populations, species, genetic diversity, and ecosystem services. Part of this crisis consists of population declines, extinctions, and increased incidence of deformities in amphibians. It is unknown whether deformities contribute to these declines. Many cases of population declines in amphibians...
Infectious diseases are a growing concern for both humans and wildlife. The negative effects of infectious disease have been exemplified by the recent global amphibian population declines associated with disease outbreaks. Although multiple pathogens and factors play a role in these declines, the aquatic fungal pathogen, Batrachochytrium dendrobatidis (Bd), has...
Porapak Q, Chromosorb 102, and Tenax GC, three porous
polymers commonly used as adsorbents in headspace analyses were
investigated. The retention times of various low-boiling compounds
relative to water were measured on the collection columns to determine
which compounds would be lost during the water removal step
employed after sampling...
A temporal record of oxygen and NO3- concentrations in the bottom water of the Santa Barbara Basin indicates that outside waters spill over into the basin seasonally. It is proposed that an annual bottom-water cycle leads ultimately to varve production.
As evidence in support of a benthic mechanism for varve...
Headwater streams in the Oregon Coastal Range are subject to drastic fluctuations in flow and temperature because of the changing seasonality of a Mediterranean climate. In response to these changes, stream fishes exhibit a variety of movement patterns. Coastal Cutthroat Trout (Oncorhynchus clarkii clarkii) have evolved an assortment of life...
Intercollegiate wrestling at Oregon State University had its
inception on March 20, 1909. On that day, the Oregon Agricultural
College wrestling team wrestled in a home meet against the team
from Washington State College. The Beavers, under the tutelage of
their first coach Eddie O'Connell, won their first intercollegiate meet,...
Published June 2009. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The abundance and distribution of biogenic, terrigenous and
volcanic particles in the Panama Basin are markedly dependent on
bottom topography and dissolution of calcite in the deeper parts of the
basin. Of the coarse fraction (>62μ), foraminiferal tests and acidic
volcanic glass shards are concentrated on the Cocos and Carnegie...
Wildfire is a largely terrestrial perturbation broadly recognized as an agent of disturbance and ecological change in forested biomes. Effects of post-fire conditions on biotic components of aquatic systems have been less well-documented, although hypothetically, the two are strongly connected. In fact, the influence of wildfire may be most profound...
Three experiments were conducted to evaluate the influence of quality of
supplemental alfalfa quality on beef cattle consuming low-quality meadow grass (MG)
roughages. Fifteen steers (250 kg) were assigned randomly to one of three treatments: 1)
meadow grass (5.2% CP), no supplement (MNS); 2) meadow grass plus high quality
alfalfa...
In cross-cultural studies, respondents from specific cultures may have different product preferences and scale usage. Combining data from different cultures will result in departures from the basic assumptions of analysis of variance (ANOVA) and loss of power in testing capability of finding product and culture differences. However, the result of...
The goals of this dissertation are centered on understanding changes in Earth surface and climate systems through the use of geologic proxies as records of past changes in these systems. Specifically, this dissertation (1) establishes a new chronology for retreat of the Ross Sea sector of the West Antarctic Ice...
Clos-based network topologies have been deployed in production data center networks to provide multiple path alternatives between the pairs of network hosts. Production data centers operate under varying traffic dynamics and topological asymmetry. Therefore, a good load balancing scheme must adapt to network conditions and dynamics in real-time and intelligently...
Measurements for water retention calculations and physical
characterization were made on skeletal and non-skeletal soils in
southwest Oregon. A new bulk density sampler was designed for the
physical characterization of the steep, skeletal soils commonly
encountered in this area. The new sampler and the techniques
required for the measurement and...
Published September 1973. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Meridional fluxes of silica across the Southern Ocean polar front
are attributed to two different processes which generally act in opposite
directions. Equatorward low frequency fluxes of silica inferred from
ISOS current meter data in the Drake Passage are approximately balanced
by poleward meridional diffusion of silica along surfaces of...
In recent years, red raspberry production in Washington and British Columbia has been severely limited by a newly emerged virus complex that causes symptoms of crumbly fruit. The complex is comprised of three viruses: Raspberry bushy dwarf virus (RBDV), Raspberry leaf mottle virus (RLMV) and Raspberry latent virus (RpLV). Both...
Studies of the effects of forest harvest on streams and fish have a long history in the Pacific Northwest. Results of this work have prompted development of new forest harvest practices that are more protective of these resources, but the effectiveness of these new practices has not been fully evaluated....
Repeated conductivity, temperature, and depth (CTD) sections were made across the continental
margin off Peru at 5°S and 10°S between November 1981 and May 1984, i.e., before, during, and after El
Nino of 1982-1983. Coastal sea level at Paita (5°S) and Callao (12°S) began to rise in early October 1982...
Large burrowing owl (Aihene cunicularia) populations exist in areas of intensive agriculture in California, and pesticide exposure has been identified as a potential threat to population persistence. I evaluated breeding season use of agricultural fields by adult male owls using radio telemetry, and examined egg contaminant residues to estimate population-level...
Published July 1975. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The increase in modern atmospheric CO₂ concentration (360 ppm) from
pre-industrial levels (280 ppm) raises concern over the impact of anthropogenic
carbon dioxide input on atmospheric chemistry. For this reason, it is important to
understand the natural fluctuations of atmospheric carbon dioxide in the past. The
Vostok ice core record...
This study seeks to examine the participation and representation of stakeholders involved in the Southern Resident Killer Whale Task Force during their first year, culminating in the publishing of their Year One Report and Recommendations for actions with the goal of moving the Southern Resident killer whales toward recovery. This...
Previous research in South Fork Hinkle Creek suggested that coastal cutthroat trout exhibit an aggregated spatial pattern across multiple spatial scales. To evaluate the persistence of the observed abundance patterns and identify factors that affect those patterns, half-duplex passive integrated transponders (PIT-tags) were implanted in 320 coastal cutthroat trout (>...
COUP-TFI, an orphan nuclear receptor of the steroid/thyroid hormone receptor superfamily, plays important roles in homeostasis and the CNS development, including differentiation, patterning, axonal projection, cell migration, cortical arealization and the temporal specification of neural stem cells. A number of COUP-interacting proteins have been described previously, and the majority of...
This thesis consists of three manuscripts addressing separate components of barley breeding, plus an introduction and a conclusion summarizing the status of barley in the Pacific Northwest, plus the implications of the research presented in this thesis. In the first manuscript, a package written for the statistical software "R" that...
The Carnegie Ridge is a linear, aseismic, submarine ridge
lying between the Galapagos Islands and the coast of South America.
A 2300 meter deep saddle near 86°W. longitude divides the ridge into
western and eastern segments. Surface ship, near bottom, and grain
size studies from the saddle have been used...
Predators are fundamentally important for regulating and driving prey population dynamics as well as structuring ecological communities. Over-exploitation of marine resources has caused dramatic depletions of predatory fish species and shifts in marine community composition, with attendant declines in productivity and diversity of marine ecosystems. Despite the important ramifications of...
As Europeans settled the Willamette Valley in the 1800s, they began to simplify Oregon's largest river contained wholly within state boarders—the Willamette. The river lost miles of channels from dikes, dams, and development. Some channels vanished under concrete. Others became meander scars, or shallow, dry depression in the land where...
Retirement is one of the most important transitional events in later life. Despite a large body of research examining the impacts of retirement on health, questions still remain regarding the relationship between retirement timing and subsequent health and survival. Previous research examining the existence, direction, and magnitude of the relationship...
Management goals for restoring populations of the federally-threatened northern spotted owl currently include experimental lethal removals of barred owls from demographic study areas within the overlapping ranges of the two species to examine northern spotted owl population response. As lethal removals of a bird species are time- and cost-intensive, predictive...
DNA from the human squamous carcinoma cell line, SK-MES-1, and the
plasmids, pUC EJ6.6 containing H-ras oncogene, pSVc-mycl containing
cellular myc gene, pNRSac containing N-ras oncogene, pBR SV containing
SV40 virus DNA, pSV2-neu containing neu oncogene and pSV2-neo
containing neomycin resistant gene were used to transform Balb serum-free
derived mouse...
Attempts were made to rear Crambus topiarius Zeller,
Euchromius ocellus (Haworth), Crambus bonifatellus (Hulst) and
Crambus trisectus (Walker) on non-aseptic meridic diets containing
wheat germ or pinto beans as basic constituents. Various methods
of diet presentation and types of rearing containers were used. Shell
vials and plastic cups used as...
Analysis of observations and sensitivity experiments with a new three-dimensional global model of stable carbon isotope cycling elucidate processes that control the distribution of delta C-13 of dissolved inorganic carbon (DIC) in the contemporary and preindustrial ocean. Biological fractionation and the sinking of isotopically light delta C-13 organic matter from...
This dissertation explores one overarching question relevant to the
paleoclimate of the latest Pleistocene glacial cycle (approximately the last
130,000 years): “How did spatial and temporal evolution of ocean
temperature, both at the surface and interior, relate to other parts of the
climate system in the late Pleistocene?” Results from...
Coastal cutthroat trout (Oncorhynchus clarkii clarkii) and cottids (Cottus spp) commonly co-occur in headwater streams in western Oregon. Little is known about the comparative trophic ecology of these species or how they respond to seasonal scarcity of resources. In this study I evaluated the seasonal variability in diets and consumption...
We assessed use and selection of cover by coastal cutthroat trout (Oncorhynchus clarkii
clarkii) in six headwater streams in three watersheds in western Oregon, USA during the summer low flow period from 1 August and September 30, 2007. We tagged 1037 coastal cutthroat trout (>100 mm) with passive integrated transponder...
The North Pacific subtropical gyre (NPSG), once considered to be a biological desert due to low primary production (PP) and its associated variability, has been found more productive and variable than previously thought. The environmental conditions controlling this relatively high PP variability are yet to be elucidated, despite important implications...
The Disney Company is an inescapable force in American life that is often detached from the stigma of big business and instead viewed as something particularly valuable, the United States’ foremost storyteller. In addition to the stories that the Disney Company
produces through its animated and live-action productions, there is...
In this study, I investigate how target value uncertainty may lead to acquirer mispricing of an acquisition target and how the mispricing may be a determinant of goodwill impairment. To the extent the mispricing leads to both high and low industry-adjusted purchase price multiples (PPMs are my proxies for overpayment...
This study compared wives defined as underemployed by educational
mismatch with not underemployed wives on four major predictor variables--
relative market work advantage; degree of competition in the
female labor market; time demands from family members; and assistance
with childcare and other housework. The data were from NE 113, An...