Published August 1989. 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
Two epidemiological studies, designed to expand our knowledge of morbidity and
mortality indicators concerning malaria and Bacillus Calmette-Guerin vaccination in the
Hospital Albert Schweitzer health district located in Central Haiti's Artibonite Valley, are
presented. The hospital serves a rural population of 190,000 in its 610 square mile
district. A large...
The myxozoan parasite, Ceratomyxa shasta, is the most significant pathogen of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Klamath River, CA, USA. This parasite requires two hosts - a freshwater polychaete (Manayunkia speciosa) and a salmonid - to complete its life cycle. The complex life cycle and large geographic area...
The phantom midges (Diptera: Chaoboridae) are a relatively small fly family composed of 50 extant species in six genera. Larvae are of interest to limnologists and ecologists because of their tolerance to toxicants, predatory avoidance strategies, and the role chaoborids play in zooplankton community dynamics. Relative to mosquitoes, systematists have...
The rapid growth of aquaculture and concomitant growth in the use of compound aquafeeds have resulted in aquaculture using 35% of global fishmeal and 54% of global fish oil in 2000, up from just 10% and 16% respectively in 1988. Meanwhile, landings of reduction fish have hovered near 30 mmt,...
This study describes and quantifies some microprocesses of malaria
transmission including blood vessel location by Anopheles stephensi and
sporozoites delivery of An. stephensi infected by Plasmodium berghei. The
study models the effects of malaria parasite-induced changes in probing
behavior and mosquito mortality on disease transmisson. Finally, host, vector,
and parasitological...
The Conference Program for IIFET, held July 10-14 in Corvallis, Oregon. Program lists the sessions by date and time and includes the session titles, speakers and paper titles.
Severe infection by the endemic myxozoan parasite, Ceratonova (synonym, Ceratomyxa) shasta, has been associated with declines in and impaired recovery efforts of populations of fall-run Chinook Salmon Oncorhynchus tshawytscha in the Klamath River, California. The parasite has a complex life cycle involving a polychaete worm host as well as a...
The extent of biological invasions, their role on the feeding of
native fishes and their impact on community stability were
investigated in Alsea Bay and Yaquina Bay, two estuaries on the
central Oregon coast, USA. Most nonindigenous species (NIS)
introduced in these intermediately invaded estuaries are
considered byproducts of culturing...
Louis de Broglie received the Nobel Prize in Physics in 1929 following experimental
confirmation of his theory of the wave properties of the electron. De Broglie was an
anomaly among twentieth-century physicists: he was a prince by birth who would become
the seventh duc de Broglie. What did it mean...
Purpose of the Study:
The purpose of this exploratory study is to find an accepted
methodology for teaching second-language suprasegrnentals by investigating
the question of whether or not the use of contrastive analysis
is superior to another method that does not use contrastive analysis.
Specifically, the comparison of methods is...
The myxozoan Ceratonova shasta is an intestinal parasite of salmon and trout that causes ceratomyxosis, a disease characterized by severe inflammation of the intestine that can lead to hemorrhaging, necrosis, and death of the fish host. The parasite is endemic to the Pacific Northwest of the United States and Canada,...
Estuaries are once again emerging as important ecosystems for scientific study. Consequently, knowledge of what research has been conducted helps us identify benchmarks and plan new projects. A comprehensive bibliography of published research, technical reports, local documents, and data sets is one means of recording this knowledge. Yaquina Bay, located...
The phylum Cnidaria contains three main branches: Anthozoa (corals, sea anemones) Medusozoa (jellyfish, hydra), and Endocnidozoa. This latter branch is characterized by parasitism and contains the microscopic fish-parasites Myxozoa. Myxozoa are highly simplified, consisting of only a few cell types, however they have retained the nematocyst stinging cells and complex...
Oregon's estuaries are important ecosystems for scientific study. Consequently, knowledge of what research has been conducted helps us identify benchmarks and plan new projects. A comprehensive bibliography of published research, technical reports, local documents, and data sets is one means of recording this knowledge. For these reasons, the Guin Library...
Diversité et distribution des poissons anostomoides (Teleostei, Characiformes) dans les Guyanes.
Cinquante-six espèces, soit approximativement 20% des Characiformes de la superfamille des Anostomidea (familles
des Anostomidae, Chilodontidae, Curimatidae et Prochilodontidae), fréquentent les eaux douces de la Guyane française, du
Guyana et du Suriname bien que ces régions ne recouvrent qu’environ...
The focus of this thesis is to design, characterize, and apply novel computational methods and molecular systems to interrogate heterogeneous human gut microbiome-related phenomena. In Chapter 2, I design, implement, and characterize a method for embedding co-occurrence patterns derived from massive 16s amplicon datasets. I use this method to 1....
Archival information about fish and water in the Umpqua Basin can be found in reports housed in disparate locations (e.g., offices of various State and Federal agencies and local organizations). A comprehensive bibliography of grey literature, important or uncataloged reports, and published reports is one means of recording what research...
The issue of immigration is at the forefront of all national policy discussions in the industrialized world. In recent years, the globalization of communication, international travel and job opportunities has rekindled this historically long and complex debate. This text attempts to explore the inadequacies of immigration policy and practice in...
This dissertation has two objectives. The first objective is to determine where best to situate the study of mentoring (i.e. the 'making of scientists') on the landscape of the history of science and science studies. This task is accomplished by establishing mentoring studies as a link between the robust body...
This research sought to identify the reasons physicians attributed for practicing in Oregon, the reasons for relocating out of Oregon, and the reasons for failures in recruiting physicians to Oregon. A random sample survey of 494 Oregon physicians identified the presence of economic and non-economic factors related to the recruitment...
From 1914-1918 the world experienced humanity’s ultimate affirmation of malice on scales scant seen in the centuries before. The Great War wrought terror on an industrial scale, throwing men headlong unto landscapes rent low by fire and steel. Our collective unconscious image of the war does well to demonstrate this....
Sardines and anchovies are small pelagic fishes that support important commercial fisheries around the world. This project reviews the inverse cyclic behavior in the abundance of these two stocks, which is a striking feature in many regions. In addition, the project used qualitative loop analysis techniques to analyze the feasible...
Analysis of observations on sequential events over time is common in real life. Sequential measurements over time describing the behavior of systems are usually called time series data, which have been collected in a wide range of disciplines. Over the years there have been multiple research areas in studying stochastic...
The distribution of Antarctic Intermediate Water in the South
Pacific has been examined using a model of horizontal advection,
along the Sigma-t surface 27.10, with three point vertical mixing.
The core of the Antarctic Intermediate Water mass was traced
from the Antarctic Convergence northward. The charts used to
describe the...
Linkages between land use and its influence on the atmosphere have been a long-standing research area. For example, what is the impact of irrigated agriculture on downwind rainfall? Global-scale models show that moisture recycling is an important source of water for inland regions around the world, but they do not...
Cordyceps is a genus of perithecial ascomycetes. It includes over 400 species
that are pathogens of arthropods and parasites of the truffle genus Elaphomyces. Based
on the morphology of cylindrical asci, thickened ascus apices and filiform ascospores,
it is classified in the Clavicipitaceae (Hypocreales), which also includes endophytes
and epiphytes...
Hair is an important piece of evidence in forensic and archaeological investigations. Analysis of the morphological features of hair has been reported since at least the early 1800's. However, many questions still remain unanswered such as, how can human groups (or local populations) be analyzed and possibly distinguished from each...
During the eighteenth century, diagrams increasingly became an important aspect of scientific inquiry. Diagrams employed simplification as a strategy for representing complex information, played a role in standardizing scientific language, and served as instruments of reason to think through and communicate problems and findings in mathematics, physics, chemistry, astronomy, natural...
Vibrio parahaemolyticus is a leading cause of acute gastroenteritis associated with consumption of seafood, particularly raw oysters. The United States Centers for Disease Control and Prevention (CDC) estimated that 45,000 cases of V. parahaemolyticus infection occur each year in the U.S. A recent CDC report revealed that the incidence of...
Nutrition and health-related risk factors could be identified through the
implementation of the nutrition preventive strategies, such as nutrition screening,
for the Chinese elderly population who are at high risk of malnutrition. Efficacious
culturally sensitive nutrition assessment tools and nutrition screening tools hold the
most essential value to assess the...
Methane is a product of biogeochemical processes which respond to changes in climate. The history of atmospheric methane is recorded by ice cores providing insight into past changes in these biogeochemical processes. This dissertation is comprised of three studies which focus on centennial- and millenial-scale variability of methane from ice...
Oregon's estuaries are important ecosystems for scientific study. Consequently, knowledge of what research has been conducted helps us identify benchmarks and plan new projects. A comprehensive bibliography of published research, technical reports, local documents, and data sets is one means of recording this knowledge. For these reasons, the Guin Library...
The climate of the Pacific Northwest is in flux, and existing forest ecosystems are stressed and poised to shift in fundamental ways, with or without human intervention. This dissertation probes the nature of forest responses to environmental change through investigations of morphology and genetics of three species of alder co-occurring...
The 158-year-old Commanding Officer's House at Fort Hoskins is one of only two such structures in Oregon representing the pre-Civil War era on the Western Frontier. From 1856-1861, it embodies a link in history between the prevailing ideology of western expansion and replication of Eastern cultural values into the frontier...
Somatic growth variation manifests from the cumulative effects of a suite of biological, ecological, and environmental processes and can have profound effects on individual fitness and species population dynamics. As ectotherms whose growth dynamics are greatly influenced by environmental factors, sea turtles display considerable variation in somatic growth within and...
Proceedings of the Eighteenth Biennial Conference of the International Institute of Fisheries Economics and Trade, held July 11-15, 2016 at Aberdeen Exhibition and Conference Center (AECC), Aberdeen, Scotland, UK.
This thesis examines the cultural context in which Japanese children are constructing their
own perspective of the environment because in the development of environmental education in
Japan, the perspectives of children and teachers have not been taken into consideration. Although
educators have made efforts to give direction to environmental education,...