Browse by Archive
ScholarsArchive at Oregon State University
|
The 1989 Exxon Valdez oil spill was a major perturbation of nearshore habitats of Prince William Sound, a wintering area for harlequin ducks (Histrionicus histrionicus). This research was designed to evaluate harlequin duck population recovery...
2000-09-27 (iso8601)
|
|
Ambystoma macrodactylum (long-toed salamander) and A. gracile (northwestern salamander) are two common salamander species occupying key trophic positions in mountain ponds of Mount Rainier National Park. The objective of this research was to...
1999-10-07 (iso8601)
|
|
The development of assays for stress in marine fishes is vital for studying the impacts of bycatch in fisheries and for determining the health of fish being cultured or used in research. This research developed behavioral and physiological assays...
2000-11-17 (iso8601)
|
|
Stress, including extreme or rapidly changing temperatures, are known to have deleterious effects on fish health and physiology. This thesis examines the combined effects of elevated acclimation temperature and acute handling stress on the number...
2000-11-28 (iso8601)
|
|
Biomass burning associated with deforestation and land use in the Amazon, greatly contributes to emissions as well as depletion of elemental pools. We identified deforestation and pasture formation and quantified resultant burning emissions and...
2000-02-24 (iso8601)
|
|
Protein microcapsules (PM) were developed as a tool for investigating aspects of dietary protein utilization by mussels, Mytilus edulis trossulus. Digestion of PM in vitro by protease, trypsin, amylase and extracts from the gut of mussels varied...
1992-08-04 (iso8601)
|
|
Juvenile English sole (Parophrys vetulus) were
collected in Yaquina Bay, Oregon from January, 1986 to
March, 1987. Recruitment of young-of-the-year sole
occurred from January to June, 1986 and again from
December, 1986 to February, 1987....
1988-12-09 (iso8601)
|
|
The infection intensity of the monogenetic trematode Gyrodactyus stellatus on laboratory held English sole (Parophrys vetulus) appeared to be influenced by handling stress, substrate, and starvation. In bioassays testing G. stellatus survival...
1991-02-05 (iso8601)
|
|
Infectious pancreatic necrosis (IPN) is an acute, contagious disease of trout fry
and fingerlings caused by viruses of the family birnaviridae. IPN disease usually results
in mortality that is inversely proportional to the age of the fish. While...
1997-01-28 (iso8601)
|
|
Electrofishing is a sampling tool commonly used by fisheries researchers. While much is known about the effects of electroshock on fish physiology, consequences to the immune system and disease progression have not received attention. To...
1999-06-16 (iso8601)
|
|
Effects of 4-inch (10.16 cm) suction dredge mining on benthic macroinvertebrates in 3rd to 4th order streams were investigated in 1996 by evaluating four mining claim operations in Althouse Creek, Sucker Creek, and Taylor Creek in southwestern...
1999-04-29 (iso8601)
|
|
The spawning habitat associated with fall chinook salmon (Oncorhynchus
tshawytscha) redd clusters was investigated in the Hanford Reach of the Columbia River.
A conceptual spawning habitat model is proposed that describes how geomorphic
features...
1998-09-30 (iso8601)
|
|
Recent declines in nesting success of some fish-eating seabirds in Alaska have been attributed to declines in availability of certain schooling forage fishes (e.g., capelin Mallotus villosus, Pacific sand lance Ammodytes hexapterus, and Pacific...
1999-10-27 (iso8601)
|
|
Juvenile chinook salmon (Oncorhynchus tshawytscha) were experimentally infected with Renibacterium salmoninarum (Rs), the causative agent of bacterial kidney disease (BKD), to investigate the effects of BKD on three aspects of juvenile salmonid...
1999-01-28 (iso8601)
|
|
Management in fire-prone ecosystems relies widely upon application of prescribed fire and/or fire surrogate (e.g., forest thinning) treatments to maintain biodiversity and ecosystem function. Recently, published literature examining wildlife...
2012-07 (iso8601)
|
|
Resident bull trout (Salvelinus confluentus) may be particularly vulnerable to human related
disturbance, however very few studies have focused on resident bull trout populations. The
abundance of bull trout is one measure of the strength and...
2000-03-07 (iso8601)
|
|
Female and male mammals have different behavioral strategies for maximizing their
reproductive success. Pregnancy and lactation obligate female mammals to provide greater
parental investment than males; thus, females compete with each other for...
1998-10-12 (iso8601)
|
|
The effects of deforestation and biomass burning in tropical dry forests (TDF)
remain a little studied phenomenon. We quantified total aboveground biomass (TAGB), carbon and nutrient (N,S,Ca,P,K) loss under two separate fire severity scenarios;...
1999-08-27 (iso8601)
|
|
In an experimental field study, populations of gray-tailed voles
(Microtus canicaudus) were exposed to a commercial formulation of
vinclozolin, a fungicide effective for disease control on ornamental plants,
turf grasses, and fruits and...
1998-06-16 (iso8601)
|
|
Upper Klamath Lake in southern Oregon has two species of lacustrine suckers,
Lost River sucker Deltistes luxatus and shortnose sucker Chasmistes brevirostris that
were historically abundant. Results of surveys performed in the mid-1980's indicated...
1998-06-26 (iso8601)
|
|
Juvenile steelhead are known to associate with shiner groups, though they also compete for food. Steelhead form dominance hierarchies within cohorts and aggressively defend feeding territories against all other fish. This study focused on the...
1999-03-02 (iso8601)
|
|
The causes of natural mortality and disease in free ranging black bears, Ursus americanus, in California, Oregon, and Washington are poorly known. Life history components, such as scavenging and overlapping habitat with many species of carnivores,...
1998-11-18 (iso8601)
|
|
Statistical modeling has evolved around building increasingly more complex models, even though it is common knowledge among statisticians that an optimal model size usually exists for any given data set. Having overly complex models leads to...
1998-06-04 (iso8601)
|
