A study of the distribution, relative abundance and diet of
fishes sympatric with juvenile sockeye salmon, Oncorhynchus nerka
(Walbaum), within the freshwater nursery areas of the Naknek River
system was undertaken from 1961 to 1963. The study was part of an
extensive investigation to determine what factors in the freshwater...
The Purpose of the Study
The primary purpose of this study was to assist in the structuring
of an empirically based vocational teacher preparatory program by determining
the hierarchical levels of common professional education competencies
needed by community college and secondary school vocational
instructors. Several dimensions were considered: personal administration...
A group of trout that reside in streams of the desiccating lake
basins of southeastern Oregon differ markedly from other known
Salmo. Known commonly as the red-band trout, this fish was subjected
to chromosome analysis for comparison with other species of
western North American Salmo. The karyotype of the red-banded...
Understory species associations and their association with tree species were examined on three intensively studied stands. We studied the chronosequence of understory species associated with different aged singleleaf pinyon (Pinus monophylla Torr. and Frem.) trees. Mid- to late pinyon-juniper understory succession was found to be more spatial than floristic in...
Moisture damage has long been recognized as one of the most
critical factors influencing the performance of asphalt concrete (AC)
pavements. This moistureinduced damage occurs from either the
physical separation of the asphalt film from the aggregate or the
softening of the asphalt binder within the AC mixture in the...
Using an oral history method, the author has recorded the life
history of Rosa González Gómez, a Mexican woman who spends part of
each year in the United States and part in Mexico. Comparing the
story of Rosa's life, as told in her own words, with literature in the
social...
Phytoplankton dynamics in Auke Bay, Alaska, were studied during
summer, 1969. Nitrate, chlorophyll a, particulate organic carbon,
phytoplankton and zooplankton species composition and hydrographic
and meteorological data were collected and analyzed.
Nitrate input into Auke Bay through freshwater runoff was negligible.
A bloom of Thalassiosira aestivalis formed the spring bloom...
In 1981, illegal processing of rapeseed oil by a Spanish oil refinery resulted in the mass foodborne illness epidemic known as Toxic Oil Syndrome (TOS). The toxic oil associated with this epidemic was sold in neighborhood markets and by itinerant salesmen as inexpensive olive oil. Ingestion of the toxic oil...
Spawning coho, chinook, and chum salmon are annually surveyed in coastal streams by Department of Fish and Wildlife personnel. Annual peak counts of spawning salmon provide data for computing an index of coastal escapement which is plotted each year to chart spawning salmon trends over a period of years. This...
Riparian ecosystems play numerous and essential roles related to the quality and
flow of water, and food/habitat for fish, and varieties of wildlife. Due to lateral and linear linkages throughout the landscape, these zones influence the integrity of the terrestrial as well as the entire aquatic-riverine ecosystem. Since Euro-American settlement...
Harvest scheduling and stand level optimization have
generally been regarded as separable problems. Some
studies have attempted to jointly optimize a wide range of stand treatments and a forest wide harvest schedule using combinations of mathematical programming techniques. The mathematical programming forest level techniques presume perfect information on production, costs...
Northern sea lions (Eumetopias lubatus) were studied at three sites (Rogue Reef, Oregon, Marmot Island, Alaska, and T.Ugamak Island,
Alaska) during the 1982, 1983, 1985, and 1986 breeding seasons. Data were collected on female activity budgets, attendance patterns, births, copulations, population structure, and patterns of seasonal and daily abundance. Females...
This study was conducted to determine the effects of
shipping stress on the immune system in domestic lambs (Ovis
aries) and to determine the potential of the thymic peptide,
thymulin, to reduce those effects of stress on the immune
system. Treatments consisted of no shipping (as unstressed
controls), shipping (as...
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...
Time series of coastal sea level during 1976–77, from 2°12′S to 17°S along the west coast of South America, show that low-frequency, ω < 0.25 cycles per day (cpd), fluctuations propagate poleward with the phase speed of baroclinic Kelvin waves (2–3 m s⁻¹). The alongshore coherence is highest in the...
Fish Commission of Oregon personnel seined selected locations of Tillamook Bay, Oregon, from June to September 1972, to determine if juvenile salmon were rearing in the estuary and to get some concept of relative numbers of fish in the various parts of the bay. These data then could be compared...
This publication is designed largely for the landowner, farmer or rancher who is considering an alternative use of his land -- recreation as a business.
Judging from the number of requests we receive for information, the vacation farm is being considered by many as a new enterprise and a new...
Published June 1981. 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
Published October 1978. 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
Nuclear waste is going nowhere, and neither is the debate over its disposal. The problem, growing every day, has proven intractable, with policymakers on one side, armed with daunting technical data, and the public on the other, declaring: not in my backyard. This timely volume offers a look past our...
LouAu (Louise/IWA8608077) (MP-7, NSL 511036) is a wheat (Triticum aestivum L.) recombinant inbred line population developed by the USDA-ARS, with Oregon State and Washington State Universities, from a cross between the soft white spring cultivar Louise and the white facultative Iranian landrace IWA8608077. The population was developed by single seed...
Abstract Endogenous levels and signaling of gibberellin plant hormones such as
gibberellic acid (GA) have been genetically down-regulated to create semi-dwarf
varieties of poplar. The potential benefits of semi-dwarf stature include reduced risk of
wind damage, improved stress tolerance, and improved wood quality. Despite these
benefits, modification of growth traits...
The Tenmile Lakes Project for partial control of warm-water fish was initiated in August of 1964, One qualified fishery biologist and one conservation aide were assigned to do the work. The reduction in assigned personnel was due to lack of funds. Although this was to be a joint project with...
Ion exchange resin/soil cores are a common in situ approach to estimating soil nitrogen (N) mineralization rates. However, no studies compare the two common methods of core preparation (disturbed and undisturbed). The objective of our study was to compare N mineralized and soil temperature in disturbed versus undisturbed cores of...
Cyphocharax biocellatus, a species of curimatid characiform apparently endemic to the Marowijne River/Fleuve Maroni system in Suriname and French Guiana, and the Maim River basin in French Guiana is described as new. The new species is diagnosed from congeners based on meristic and morphometric features and details of pigmentation of...
Water temperature influences almost every biological and physiological process of salmon, including disease resistance. In the Klamath River (California), current thermal conditions are considered sub-optimal for juvenile salmon. In addition to borderline temperatures, these fish must contend with the myxozoan parasite Ceratomyxa shasta, a significant cause of juvenile salmonid mortality...
This paper examines the ability of a new policy to reduce bycatch of red snapper by the shrimp fishery in the Gulf of Mexico: Fractional License as proposed by Townsend. The policy is evaluated both theoretically and using a simulation model.
The removal of dams on a river is one potential tool for the ecological restoration of native salmonid fishes. However, the removal of barriers also introduces risks, such as the introduction of fish pathogens into previously isolated populations. The proposed removal of four dams on the Klamath River, Oregon–California, provides...
Conductivity data from which salinity values were computed were collected at 10 locations in Yaquina Bay from April 1967 to October 1968. Streamflow was measured for the Yaquina River, Elk Creek and Mill Creek from April 1967 to November 1968. Wind speed and direction data were collected near the mouth...
There has been a dramatic increase in jellyfish biomass over the eastern Bering Sea shelf since the early 1990s, which was previously hypothesized to have been triggered by changing climate and ocean conditions. We examine the hypothesis that the presence of these large carnivores has affected fisheries resources, either through...
The purpose of this study was to test the hypothesis that NH4+ uptake by heterotrophic bacteria in the subarctic Pacific is C limited. Addition of glucose (0.5–1.0 μM) stimulated NH4+ uptake in unfractionated water but had no effect on bacterial abundance. Glucose stimulation of NH4+ uptake was even greater in...
As part of the Peru Currents study, CTD observations were made off the
coasts of Peru and Ecuador between 3°N and 17°S from the R/V Wecoma,
February-March 1983 and March-April 1985, and from the R/V Endeavor,
November-December 1983 and April-May 1984. Repeated CTD sections were
occupied within 300 km of...
CTD observations were made along sections near Coos Bay at 43° 13'N, off Crescent City at 41° 54'N, off Eureka at 40° 51 'N, off of Half Moon Bay at 37°2q'N, off of Pt. Purisima at 34° 45'N, and along the Code Central and Pt. Arena lines near 39°N during...