Index Catalog // ScholarsArchive@OSU

Re-Occupancy of Breeding Territories by Ferruginous Hawks in Wyoming: Relationships to Environmental and Anthropogenic Factors

Creator:: Wallace, Zachary P., Kennedy, Patricia L., Squires, John R., Oakleaf, Robert J., Olson, Lucretia E., and Dugger, Katie M.
Abstract:: Grassland and shrubland birds are declining globally due in part to anthropogenic habitat modification. Because population performance of these species is also influenced by non-anthropogenic factors, it is important to incorporate all relevant ecological drivers into demographic models. We used design-based sampling and occupancy models to test relationships of environmental...
Resource Type:: Article

Prevalence, geographic distribution, and biology of a dungeness crab, Cancer magister, microsporidian parasite

Creator:: Childers, Richard K.
Abstract:: The microsporidian parasite Nadelspora canceri infects Dungeness crabs, Cancer magister, along the United States Pacific Northwest coast. The prevalence and seasonal variation of N. canceri in Dungeness crabs from Alsea Bay, Oregon, are described based on examination of 2991 crabs collected at monthly intervals from October, 1991 to June, 1993....
Resource Type:: Masters Thesis
Full Text:: Distribution, and Biology of a Dun geness Crab._Cancer Abstract approved: E. Olson The microsporidian

Host responses of English sole (Parophrys vetulus) to infection by the monogenetic trematode Gyrodactylus stellatus

Creator:: Moore, Michelle M.
Abstract:: 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 times in mucus and serum collected from laboratory held sole at different times during trematode infection, trematode survival...
Resource Type:: Masters Thesis
Full Text:: Gyrodactylus stellatus Abstract approve » Dr. Robert E. Olson The infection intensity of the monogenetic

Epidermal tumors on juvenile English sole (Parophrys vetulus) from Yaquina Bay, Oregon

Creator:: Koike, Bruce Gary
Abstract:: 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. Emigration from Yaquina Bay started in September, 1986, but a small portion of the English...
Resource Type:: Masters Thesis
Full Text:: SOLE (PAROPHRYS VETULUS) FROM YAQUINA BAY, OREGON Abstract approved: > Dr. Robert E. "t51son

Differences in pathogenicity and pathology of Vibrio anguillarum and Vibrio ordalii in chum salmon (Oncorhynchus keta) and English sole (Parophrys vetulus) under laboratory conditions

Creator:: Handoyo, Nitimulyo Kamiso
Resource Type:: Dissertation
Full Text:: ENGLISH SOLE (PAROPHRYS VETULUS) UNDER LABORATORY CONDITIONS Abstract approved: Dr. Robert E. Olson

A morphological and histological study of Kudoa spp. (Myxozoa, Myxosporea) in four Pacific marine fishes

Creator:: Anderson, James A. (James Allen), 1959-
Resource Type:: Masters Thesis
Full Text:: (Olson, personal communication). These myxosporeans have not been studied so their relationship to

The effects of intermittent and continuous copper exposure on the susceptibility of Steelhead trout (Salmo gairdneri) to infection by Vibrio anguillarum

Creator:: Paylor, David King
Resource Type:: Masters Thesis

Genetic and meristic relationships of coastal cutthroat trout (Oncorhynchus clarki clarki) residing above and below barriers in two coastal basins

Creator:: Griswold, Kitty E.
Abstract:: An investigation of the genetic and meristic patterns of coastal cutthroat trout (Oncorhynchus clarki clarki) in two coastal basins, one in Oregon and one in Alaska, revealed varying degrees of differences among populations within each site. Coastal cutthroat trout collected from seven sites above and below barriers from Elk River,...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Kitty E. Griswold for the degree

Coexistence of top predators in headwater streams : pathways of intraguild predation between Pacific Giant salamander larvae and cutthroat trout

Creator:: Rundio, David E.
Abstract:: The coexistence of multiple predators may have important consequences for the structure and function of communities. Interactions between predators may strongly affect their combined direct and indirect effects on prey populations and lower trophic levels. Predators often have size-structured populations, which may result in intraguild predation characterized by complex trophic...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF David E. Rundio for the degree of

Life history variation and movement among three populations of redband trout (Oncorhynchus mykiss gairdneri) in the middle Deschutes Basin, Oregon

Creator:: Groves, Kristy L.
Abstract:: Redband trout (Oncorhynchus mykiss gairdneri) are found over a wide range of environmental conditions and are known for their variability in life history traits among watersheds or even within streams. Life history traits and population structure of these trout can be influenced by a variety of anthropogenic changes including habitat...
Resource Type:: Masters Thesis
Full Text:: Basin, Oregon. Abstract approved: Barbara A. Shields Robert E. Olson Redband trout (Oncorhynchus

Dispersal patterns of Washington ground squirrels in Oregon

Creator:: Klein, Kimberly J.
Resource Type:: Masters Thesis
Full Text:: .: Gail S. Olson Signature redacted for privacy. --Robert G. Ant~y The Washington ground squirrel

Biodiversity in managed forests of western Oregon : species assemblages in leave islands, thinned, and unthinned forests

Creator:: Wessell, Stephanie J.
Abstract:: Both leave islands, or green tree retention clusters, and thinning prescriptions have been proposed as alternative silvicultural strategies designed to sustain the structural and biological diversity of managed forests. However, the relationship of the physical structure of leave islands and thinned forests to their associated microclimates, flora, and fauna remain...
Resource Type:: Masters Thesis
Full Text:: . Abstract approved: Deanna H. Olson Richard A. Schmi{zj Both leave islands, or green tree retention

Functional relationships among vegetation, nocturnal insects, and bats in riparian areas of the Oregon Coast Range

Creator:: Ober, Holly K.
Abstract:: Vegetation provides food for many insects, and many insects serve as food for bats. We investigated the linkages among these three trophic levels in riparian areas throughout the Oregon Coast Range by examining the influence of vegetation cover, composition, and structure on the activity of nocturnal insects and bats, the...
Resource Type:: Dissertation
Full Text:: , and Dr. Gail Olson provided expertise in model selection. I am grateful to Manuela Huso and NaDene

Factors influencing density, distribution, and mesohabitat selection of juvenile wild salmonids and residual hatchery winter steelhead

Creator:: Brignon, William R., Olson, Douglas E., Schaller, Howard A., and Schreck, Carl B.
Abstract:: To best manage Eagle Creek National Fish Hatchery, negative interactions between hatchery salmonids and Endangered Species Act listed wild salmonids in the Eagle Creek Basin need to be minimized. Our objectives were: 1) to compare summer rearing densities in two similar streams, where one stream received a release of hatchery...
Resource Type:: Article
Full Text:: ,⁎, Douglas E. Olson a, Howard A. Schaller a, Carl B. Schreck b a United States Fish and Wildlife Service

Age-specific and lifetime reproductive success of known age Northern Spotted Owls on four study areas in Oregon and Washington

Creator:: Loschl, Peter J.
Abstract:: Northern Spotted Owls (Strix occidentalis caurina) are a long-lived forest owl and range-wide declines in their numbers have resulted in the species being listed as threatened under the endangered species act. While many studies have been focused on population trends and reproductive performance of Spotted Owls from different age-classes, none...
Resource Type:: Masters Thesis
Full Text:: guidance of my graduate research committee members Gail Olson and David Lytle. Tom Snetsinger and

Virulence characteristics of infectious pancreatic necrosis virus (IPNV) in brook trout, Salvelinus fontinalis, fry

Creator:: Maret, Joseph J.
Abstract:: 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 many studies have been carried out to increase our understanding of IPN,...
Resource Type:: Masters Thesis
Full Text:: on my research. I would also like to thank the other members of my committee, Robert Olson, Jo-Ann

Physiological and pharmacological investigation of the vascularized and nonvascularized teleost heart with adrenergic, cholinergic and coronary dilating agents

Creator:: Stuart, Robert Edward
Resource Type:: Masters Thesis
Full Text:: . Robert E. Olson and Dr. Paul Kifer. Additionally, special thanks go to friend and fellow student Daniel

Host Identity Matters in the Amphibian-Batrachochytrium dendrobatidis System: Fine-Scale Patterns of Variation in Responses to a Multi-Host Pathogen

Creator:: Gervasi, Stephanie, Gondhalekar, Carmen, Olson, Deanna H., and Blaustein, Andrew R.
Abstract:: Species composition within ecological assemblages can drive disease dynamics including pathogen invasion, spread, and persistence. In multi-host pathogen systems, interspecific variation in responses to infection creates important context dependency when predicting the outcome of disease. Here, we examine the responses of three sympatric host species to a single fungal pathogen,...
Resource Type:: Article
Full Text:: may be mediated through intrinsic host traits. Citation: Gervasi S, Gondhalekar C, Olson DH

Local weather, regional climate, and population dynamics of northern spotted owls in Washington and Oregon

Creator:: Glenn, Elizabeth M.
Abstract:: Since the early 1990s, declines in northern spotted owl (Strix occidentalis caurina) populations have been documented through extensive field surveys and range-wide demographic analyses. Although loss of late-successional forest has been credited as the primary cause for spotted owl population declines, environmental variation has also been shown to influence vital...
Resource Type:: Dissertation
Full Text:: . Burnham, G. C. White, C. J. Schwarz, J. Nichols, J. E. Hines, G. S. Olson, S. E. Ackers, S. L

Population and behavioral responses of small mammals to silviculture and downed wood treatments in the Oregon Coast Range

Creator:: Waldien, David L.
Abstract:: Forest managers are challenged to provide timber revenues and other resources for society while protecting and enhancing components of biodiversity that are often associated with older forests or older forest structure, such as dead wood. We examined small mammal response to timber harvest in stands 8-10 years following group-selection, two-story,...
Resource Type:: Dissertation
Full Text:: especially like to thank E. Beever, J. Faulkner, T. Manning, G. Smith, T. Smith, M. Stoddard, and S. Walter

Biological and mathematical modeling of dynamics of furunculosis in chinook salmon (Oncorhynchus tshawytscha) and infectious hematopoietic necrosis (IHN) in rainbow trout (Oncorhynchus mykiss)

Creator:: Ogut, Hamdi
Abstract:: A series of experiments with Aeromonas salmonicida and infectious hematopoietic necrosis virus (IHNV) were carried out to determine dynamics of the spread of infection in chinook salmon (1.2-1.98g) and rainbow trout (1.2-3.1g). It was found in experiments with A. salmonicida that fish infected by bath immersion became infectious at 4...
Resource Type:: Dissertation
Full Text:: members: Dr. Robert Olson, Dr. David Sampson, Dr. Richard Holt, Dr. Anne Rossignol, Dr. Carl Schreck and

Pool habitat characteristics and juvenile anadromous salmonids in two Oregon coastal streams

Creator:: Haapala, Deborah L.
Abstract:: Relations between the diversity of juvenile anadromous salmonids and pool features were examined in a managed and a pristine watershed in Oregon during the summer of 1990. There were no differences (p>0.05) in pool depth, velocity or pool wood volumes between streams. However, the pristine system had twice the number...
Resource Type:: Masters Thesis
Full Text:: . Deanna Olson, Stanley Gregory, Robert Beschta, and Allen Smith who have encouraged, supported, and have

Agricultural impacts on amphibian survival, growth, and distributions

Creator:: Baker, Nick J.
Abstract:: The potential impact of chemical contaminants and conservation practices on amphibians in agricultural landscapes is a key research topic globally. Amphibians represent a common group in many freshwater systems and are currently experiencing worldwide population declines. Global amphibian declines may be attributed to a number of causes, including habitat loss,...
Resource Type:: Masters Thesis
Full Text:: established protocols (Olson et al. 1997). Stream Protocols for Amphibian Surveys 13

Fishing location choices in Oregon trawl fisheries : are fishermen risk-averse or risk-prone?

Creator:: Trisak, Jiraporn
Abstract:: Despite the fact that fishing is an inherently uncertain business, risk has rarely been formally recognized in fisheries science or management. Few fishery management plans include any form of risk assessment and those that do focus on minimizing risk caused by uncertainty associated with markets and environmental conditions. Fishermen's attitudes...
Resource Type:: Masters Thesis
Full Text:: thankful to the members of my committee: Dr. Robert Olson, Dr. Clifford Ryer, and Dr. Susan Hannah, and

Host parasite relationships between Gyrodactylus stellatus and the English sole (Parophrys vetulus)

Creator:: Handoyo, Nitimulyo Kamiso
Resource Type:: Masters Thesis
Full Text:: BETWEEN GYRODACTYLUS STELLATUS AND THE ENGLISH SOLE (PAROPHRYS VETULUS) Abstract approved Dr. Robert E

Ecology of the striped seaperch, Embiotoca lateralis, in Yaquina Bay, Oregon

Creator:: Gnose, Charles E.
Resource Type:: Masters Thesis
Full Text:: and Wildlife ean of Graduate School Date thesis is presented yQsQ\' \ \C'7 Typed by Donna Olson for

Genetic diversity in coastal cutthroat trout and Dolly Varden in Prince William Sound, Alaska

Creator:: Griswold, Kitty E.
Abstract:: Genetic diversity of two salmonid species, Dolly Varden (Salvelinus malma) and coastal cutthroat trout (Oncorhynchus clarki clarki) in Prince William Sound, Alaska were examined at multiple spatial scales with three molecular markers. Pleistocene glaciers covered what is now Prince William Sound 8,000- 12,000 years ago and both species colonized the...
Resource Type:: Dissertation
Full Text:: Prince William Sound, Alaska. By Kitty E. Griswold A DISSERTATION submitted to Oregon State

The effects of temperature and food availability on energy partitioning and growth in the pacific oyster Crassostrea gigas (Thunberg)

Creator:: Malouf, Robert E.
Resource Type:: Dissertation
Full Text:: Crassostrea as (Thunberg) Abstract approved: Dr. Charles E. Warren In general terms, the objective of this

A geographical framework for assessing longitudinal patterns in stream habitat and fish distribution

Creator:: Torgersen, Christian E.
Abstract:: New approaches are needed to quantify and understand spatial patterns of stream fishes and their environment. Concepts in riverine ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat and biota, but little is known about spatial variability within the river continuum. I present a conceptual...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Christian E. Torgersen

The Effects of Tank Structure and Egg Size on the Production of Wild Steelhead (Oncorhynchus mykiss) Surrogate Fish

Creator:: Self, Katharine E.
Abstract:: One of the biggest hurdles for a juvenile salmonid (Oncorhynchus mykiss) is migrating downstream from freshwater spawning grounds to the ocean. Juveniles from wild broodstock were reared from the South Santiam River for more than 1 year at the Oregon Hatchery Research Center (OHRC) in Alsea, OR. The fish were...
Resource Type:: Masters Thesis
Full Text:: Katharine E. Self for the degree of Master of Science in Fisheries Science presented on May 17, 2017

The effects of prescribed burning on small mammal communities in Lava Beds National Monument, California

Creator:: Frenzel, Richard Wilmarth
Abstract:: The effects of prescribed burning on the abundance, species composition, and reproduction of small mammals were studied over a one year period. Two burn areas were studied, one in sagebrush/ bunchgrass and one in cheatgrass. The short-term effects were studied using monthly mark-recapture trapping on two treatment and two control...
Resource Type:: Masters Thesis
Full Text:: , CALIFORNIA Abstract approved: Redacted for privacy Dr. Edward E. Starkey The effects of prescribed burning

Growth and food consumption of juvenile coho salmon exposed to natural and elevated fluctuating temperatures

Creator:: Everson, Larry B.
Abstract:: The growth and food consumption of juvenile coho salmon [Oncorhynchus kisutch (Walbaum)] exposed to natural and elevated fluctuating temperatures were studied in the laboratory with wild fish collected from a salmonid rearing stream. Control temperatures were similar to the temperature regime of a natural stream and the elevated temperatures were...
Resource Type:: Masters Thesis
Full Text:: approved: erald E. Davis The growth and food consumption of juvenile coho salmon [Oncorhynchus kisutch

Changes in size and age at maturity of Columbia River upriver bright fall chinook salmon (Oncorhynchus tshawytscha) : implications for stock fitness, commercial value, and management

Creator:: Beaty, Roy E.
Abstract:: The average size and age of chinook salmon (Oncorhynchus tshawytscha) caught in commercial fisheries along the Pacific Coast of North America have decreased substantially in this century. These declines might be caused in part by changes in size and age at maturity within the stocks contributing to those fisheries. Upriver...
Resource Type:: Masters Thesis
Full Text:: value, and management AN ABSTRACT OF THE THESIS OF Roy E. Beaty for the degree of Master of Science

Multiscale assessment of thermal patterns and the distribution of chinook salmon in the John Day River Basin, Oregon

Creator:: Torgersen, Christian E.
Abstract:: This study examined the distribution and behavior of adult spring chinook salmon (Oncorhynchus tshawytscha) related to patterns of stream temperature and physical habitat at channel unit, reach, and basin-wide spatial scales in both a wilderness stream and a disturbed stream in the John Day River basin in northeastern Oregon. Thermal...
Resource Type:: Masters Thesis
Full Text:: of Chinook Salmon in the John Day River Basin, Oregon AN ABSTRACT OF THE THESIS OF Christian E

The relationship of physical condition and fertility of female Roosevelt elk (Cervus canadensis roosevelti) in Oregon

Creator:: Trainer, Charles E.
Resource Type:: Masters Thesis
Full Text:: Fisheries and Wildlife Dean of Graduate School Date thesis is presented Typed by Donna L. Olson for

Potential effects of ungulate exclusion fencing on displaying Hawaiian Petrels (Pterodroma sandwichensis) at Hawai'i Volcanoes National Park

Creator:: Swift, Roberta
Abstract:: Recently the National Park Service has proposed raising fence heights to exclude mouflon sheep (Ovis musimon) from conservation areas at Hawai'i Volcanoes National Park. Concern over previous mortality of Hawaiian Petrels (Pterodronia sandwichensis) due to collision with fences prompted this study to quantify the potential effects of raising fence heights...
Resource Type:: Masters Thesis
Full Text:: prehistorically common in Hawai'i (Olson and James 1982b), but were thought to be extirpated from Hawai'i Island

Population ecology of the Columbian white-tailed deer

Creator:: Gavin, Thomas Alan
Abstract:: A population of Columbian white-tailed deer (CWTD) was studied on a refuge (790 ha) in southwestern Washington during 1972-77. Quality of habitat was considered good for these deer and total population size remained between 164-230 as determined by mark-recapture methods during November. Population size declined significantly between the winters of...
Resource Type:: Dissertation
Full Text:: . Abstract approved: Redacted for privacy E. Chadles Meslow A population of Columbian white-tailed deer

Effects of temperature, ration, and size on the growth of juvenile steelhead trout, Salmo gairdneri

Creator:: Wurtsbaugh, Wayne Alden
Abstract:: The effects of temperature, temperature fluctuation, and fish size on the growth of juvenile steelhead trout (Salmo gairdneri) were studied in experiments which lasted 10 to 25 days. Groups of fish were fed at ration levels varying from near-starvation to repletion. Decelerating, curvilinear relationships between rates of food consumption and...
Resource Type:: Masters Thesis
Full Text:: THE THESIS OF presented on Gerald E. Davis The effects of temperature, temperature fluctuation, and

Influence of biologically stabilized kraft mill effluent on the food relations and production of juvenile chinook salmon in laboratory streams

Creator:: Seim, W. K. (Wayne K.)
Abstract:: This thesis reports the results of a study on the influence of biologically stabilized kraft mill effluent (SKME) on the food relations and production of juvenile chinook salmon, Oncorhynchus tschawytscha (Walbaum), in laboratory streams. Experiments were conducted at the Oak Creek Fisheries Research Laboratory, Oregon State University, during 1967 and...
Resource Type:: Masters Thesis
Full Text:: Fisheries Redacted for Privacy Dean of Graduate School Date thesis is presented E /l d- rz /") lq ID 41

Classification and management of earthen aquaculture ponds, with emphasis on the role of the soil

Creator:: Bowman, James R.
Abstract:: Soil, water, and climatic classification systems are reviewed as background for the construction of a classification system for earthen aquaculture ponds. The physical and chemical properties of important soil types are also reviewed because of the critical role that the soil plays in earthen pond systems. A pond classification system...
Resource Type:: Dissertation

Effects of rotenone treatment on the fauna of the Green River, Wyoming

Creator:: Binns, Niles Allen
Resource Type:: Masters Thesis
Full Text:: personnel who assisted in gathering data during the treatment. Gratitude is expressed to Mr. E. L

The effects of sewage on the distribution and abundance of benthic animals in a Puget Sound bay

Creator:: Shapeero, William L.
Abstract:: The effects of discharged sewage on physico-chemical conditions and the distribution and abundance of marine benthic animals were studied in Shilshole Bay, a part of Puget Sound, off Seattle, Washington. For over 50 years prior to 1965, when this study was initiated, 87,300 pounds (32,400 pounds BOD) per day of...
Resource Type:: Dissertation
Full Text:: approved: Redacted for Privacy wCharles E. Warren The effects of discharged sewage on physico-chemical

Interactions between grizzly bears and hikers in Glacier National Park, Montana

Creator:: Jope, Katherine Louise McArthur
Abstract:: Behavior of grizzly bears (Ursus arctos) toward people was studied by examining hikers' reports of grizzly bear observations and by intensively observing grizzlies in an area of Glacier National Park that was heavily used by day-hikers. Of concern were the apparent habituation of grizzly bears to people in the study...
Resource Type:: Masters Thesis
Full Text:: Bears and Hikers in Glacier National Park, Montana Abstract approved: Redacted for Privacy Edward E

Temperature and the bioenergetics of Cichlasoma bimaculatum

Creator:: Sethi, Hari Singh
Abstract:: One means of evaluating the temperature requirements of an animal is to determine changes temperature causes in the uses and losses of energy and materials in the food the animal consumes. To develop energy budgets for cichlids (Cichlasoma bimaculatum) at different temperatures (20, 24, 28, 32 and 36 C) data...
Resource Type:: Dissertation
Full Text:: BIOENERGETICS OF CICHLASOMA BIMA ULATUM Abstract approved: Redacted for Privacy Charles E. Warren One means

Status and habitat use of Columbian white-tailed deer in Douglas County, Oregon

Creator:: Smith, Winston Paul
Abstract:: A study conducted May 1978-December 1980 determined that the present geographic range of Columbian white-tailed deer, Odocoileus virginianus leucurus, (CWTD) in Douglas County, Oregon encompassed 1199km2. The area was predominately a Quercus woodland community, typical of the Interior Valley Zone of western Oregon. The CWTD distribution was not contiguous throughout...
Resource Type:: Dissertation
Full Text:: . Dr. Bruce E. Coblentz, principal investigator and my major advisor during this study, provided

Some aspects of the comparative ecology of fishes associated with juvenile sockeye salmon, Oncorhynchus nerka (Walbaum), in the lakes of the Naknek river system, Alaska

Creator:: Wallace, Richard L.
Abstract:: 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...
Resource Type:: Dissertation
Full Text:: September 20, 1968 Typed by Donna L. Olson for Richard Lee Wallace ACKNOWLEDGMENTS I would like to

Limnology of Upper Klamath Lake, Oregon, with emphasis on benthos

Creator:: Hazel, Charles R.
Abstract:: Aspects of the limnology and benthic ecology of Upper Klamath Lake, Oregon, are described emphasizing those features that identify its uniqueness. The lake is large, shallow, and characterized by nuisance abundances of Aphanizomenon flos-aquae and midge flies. Results of this study indicate that it does not stratify and dissolved oxygen...
Resource Type:: Dissertation
Full Text:: Abstract approved: C. E. Bond Aspects of the limnology and benthic ecology of Upper Kiamath Lake, Oregon

Factors affecting the abundance of fall chinook salmon in the Columbia River

Creator:: Van Hyning, Jack M.
Abstract:: A study of the population ecology of Columbia River fall chinook salmon, Oncorhynchus tshawytscha (Walbaum), was made in an attempt to determine the cause of a serious decline in this run which occurred in the early 1950's. Fluctuations in abundance of major salmon runs the North Pacific were examined to...
Resource Type:: Dissertation
Full Text:: and re- viewing the manuscript. Likewise, Messrs. Arthur L. Oakley and Robert E. Loeffel of the

Growth and development of temperate and tropical passerines of the New World : a life history perspective

Creator:: Austin-Bythell, Suzanne H.
Abstract:: I studied developmental rates in a suite of temperate and tropical passerine bird species from the New World to test the hypothesis that tropical passerines exhibit slower patterns of growth and development than temperate birds. I also investigated how the expression of several developmental rates varied with life history traits...
Resource Type:: Masters Thesis
Full Text:: throughout this process. Thanks to my committee, Dr. Daniel D. Roby and Dr. Robert E. Ricklefs, for their

Seasonal movement, residency, and migration patterns of Wilson's Snipe (Gallinago delicata) across the annual cycle in the Willamette Valley of Oregon.

Creator:: Cline, Brittany B.
Abstract:: Studies of avian movement ecology afford essential insights regarding species' life histories, population dynamics, habitat and resource requirements, and other ecological relationships. While it is widely recognized that events in different stages of the annual cycle have important implications for processes in avian ecology, evolution, and conservation, challenges associated with...
Resource Type:: Masters Thesis
Full Text:: initiative. I am particularly indebted to M. Carper, M. Cline, K. Fehring, J. Hatt, and E. Krantz for

Influence of water temperature and beaver ponds on Lahontan cutthroat trout in a high-desert stream, southeastern Oregon

Creator:: Talabere, Andrew G.
Abstract:: The distribution of Lahontan cutthroat trout Oncorhynchus clarki henshawi was assessed in a high-desert stream in southeastern Oregon where beaver Castor canadensis are abundant. Longitudinal patterns of beaver ponds, habitat, temperature, and Lahontan cutthroat trout age group distribution were identified throughout Willow Creek. Three distinct stream segments were classified based...
Resource Type:: Masters Thesis
Full Text:: & Kira Willson, and Marc & Jean Olson. Thank you to my family, especially my mom and dad, Herb and

Temporal changes in the feeding habits of bullfrogs from three different habitat types in the Willamette Valley, Oregon

Creator:: Bouska, Cassie K.
Abstract:: Bullfrogs were introduced into Oregon in the early 1900s and have become widespread members of many wetland communities. Little is known of their ecology outside their native range, although they may play a role in the current declines observed in native herpetofauna. I analyzed the diets of 401 bullfrogs from...
Resource Type:: Masters Thesis
Full Text:: dlife Science Co-Major Professor, representing Wit .e S ience Chair of Department, Fisheries and

Seasonal properties of the coyote scent station index

Creator:: Griffith, Dennis Bradley
Abstract:: Six standard coyote scent station index lines and one scentless control line were repeatedly sampled from May through October, 1974, on a 400 square mile study area in Central Oregon. The scent station index remained relatively constant at a mean value of 0.025 from May through mid-August; increased to a...
Resource Type:: Masters Thesis
Full Text:: and subse- quent data analysis. E. Charles Meslow served as my major professor during the data

Utilization of dietary protein by the mussel, Mytilus edulis trossulus (Linnaeus 1758)

Creator:: Kreeger, Daniel A.
Abstract:: 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 significantly depending on the type of protein encapsulated or whether carbohydrates were added...
Resource Type:: Dissertation
Full Text:: :..:;..::;:us::;,;tin::":.:..:.K;::r.,::.ee""ig;r.:e:;.:.r______ Redacted for Privacy Redacted for Privacy

Movement Ecology and Population Dynamics of the Endangered Hawaiian Duck (Anas wyvilliana)

Creator:: Malachowski, Christopher P.
Abstract:: Fundamental objectives in the field of conservation biology involve understanding the processes that influence small and declining populations and applying that knowledge to develop appropriate monitoring strategies and targeted management and conservation actions. Critical first steps in determining the relative role of factors that drive population declines involves estimation of...
Resource Type:: Dissertation

Nesting and foraging ecology of band-tailed pigeons in western Oregon

Creator:: Leonard, Jerome Patrick
Abstract:: Pacific Coast band-tailed pigeons (Columba fasciata) have declined markedly during the past several decades. Despite implementation of increasingly restrictive hunting regulations, populations have shown minimal signs of recovery. I radio-marked 127 adult band-tailed pigeons in the central Oregon Coast Range in April-May of 1993-95 to document nesting chronology and productivity,...
Resource Type:: Dissertation
Full Text:: graduate committee--Drs. Diane J. Carroll, William C. McComb, E. Charles Meslow, John C. Tappeiner, and

Carp, Climate, and Water Quality: Applying Systems Modeling to Ecosystem Recovery in Malheur Lake

Creator:: Pearson, James B.
Abstract:: Shallow lakes exist in either a clear or turbid state, with the clear state characterized by an abundance of aquatic macrophytes, diverse aquatic biota, low water column nutrients and phytoplankton biomass, whereas the turbid state is characterized by the opposite. These two distinct states are maintained by reinforcing (positive) feedback...
Resource Type:: Dissertation
Full Text:: state. 6 References Breukelaar, A. W., Lammens, E. H., Breteler, J. G. K., & Tatrai, I. (1994

Parasite communities indicate effects of cross-shelf distributions, but not mesoscale oceanographic features on northern California Current mid-trophic food web

Creator:: Jacobson, Kym C., Baldwin, Rebecca E. B., and Reese, Douglas C.
Abstract:: Mesoscale physical oceanographic features, such as jets and eddies, can influence the structure of marine ecosystems. We used trophically transmitted parasite communities of pelagic fishes in the northern California Current to examine effects of physical oceanographic features on pelagic ecosystem structure. We tested the hypotheses that (1) oceanographic features associated...
Resource Type:: Article
Full Text:: (R. Olson pers. data) and to type specimens from the US National Parasite Collection, Beltsville

eDNA as a tool for identifying freshwater species in sustainable forestry: A critical review and potential future applications

Creator:: Coble, Ashley A., Flinders, Camille A., Homyack, Jessica A., Penaluna, Brooke E., Cronn, Richard C., and Weitemier, Kevin
Abstract:: Environmental DNA (eDNA) is an emerging biological monitoring tool that can aid in assessing the effects of forestry and forest manufacturing activities on biota. Monitoring taxa across broad spatial and temporal scales is necessary to ensure forest management and forest manufacturing activities meet their environmental goals of maintaining biodiversity. Our...
Resource Type:: Article
Full Text:: . Coble, Camille A. Flinders, Jessica A. Homyack, Brooke E. Penaluna, Richard C. Cronn, Kevin Weitemier

Harmful algal blooms along the North American west coast region: History, trends, causes, and impacts

Creator:: Lewitus, Alan J., Horner, Rita A., Caron, David A., Garcia-Mendoza, Ernesto, Hickey, Barbara M., Hunter, Matthew, Huppert, Daniel D., Kudela, Raphael M., Langlois, Gregg W., Largier, John L., Lessard, Evelyn J., RaLonde, Raymond, Rensel, J. E. Jack, Strutton, Peter G., Trainer, Vera L., and Tweddle, Jacqueline F.
Abstract:: Along the Pacific coast of North America, from Alaska to Mexico, harmful algal blooms (HABs) have caused losses to natural resources and coastal economies, and have resulted in human sicknesses and deaths for decades. Recent reports indicate a possible increase in their prevalence and impacts of these events on living...
Resource Type:: Article
Full Text:: , Barbara M. Hickey b, Matthew Hunter e, Daniel D. Huppert f, Raphael M. Kudela g, Gregg W. Langlois h, John

Genetic Connectivity of Dungeness Crab (Cancer magister) in the California Current System and Puget Sound

Creator:: Jackson, Tyler M.
Abstract:: Understanding connectivity among exploited populations is critical to their sustainable management and long-term viability. In the marine environment, estimates of connectivity often rely on the use of genetic markers, as dispersal primarily occurs during a planktonic larval phase which is difficult to track using direct methods. In this thesis, we...
Resource Type:: Masters Thesis

Carbon Dynamics in Response to Land Cover Change in Tropical Peatlands, Kalimantan, Indonesia

Creator:: Basuki, Imam
Abstract:: This study focuses in providing the knowledge on carbon (C) stocks, emission and ecosystem productivity related to land use/land cover change in tropical peatlands. The field research activities were conducted for about 17 months between August 2013 to December 2015, at Pematang Gadung peat dome (peat depth up to 10.5...
Resource Type:: Dissertation
Full Text:: were net carbon sources; they have negative mean NEP values (-0.1 Mg CO2-e ha -1 yr-1 and -25.1 Mg

Characterizing Microplastic Ingestion in Black Rockfish (Sebastes melanops) along the Oregon Coast

Creator:: Lasdin, Katherine S.
Abstract:: Microplastics (<5mm diameter) are present in a considerable number of marine and aquatic species. Understanding which species, the global spatial distribution, and what quantities of microplastics are present is extremely important for understanding the potential impacts they could have on recreationally important organisms and for the assessment of risk. We...
Resource Type:: Masters Thesis
Full Text:: may degrade. In addition to the teamwork, a few methods of PET(E) degradation were examined. With

Effects of oil and natural gas development on territory occupancy of ferruginous hawks and golden eagles in Wyoming, USA

Creator:: Wallace, Zachary P.
Abstract:: Energy development is expanding rapidly across the western US. Negative effects have been documented for some wildlife, but consequences of development are unclear for other taxa, including raptors. We had the opportunity to examine effects of oil and natural gas development on two raptor species of conservation concern, ferruginous hawks...
Resource Type:: Masters Thesis
Full Text:: dedication to Wyoming’s wildlife. Lucretia Olson lent analytical prowess and moral support from start to

Hydrologic and vegetation responses associated with restoration of wetlands in the Willamette Valley, Oregon

Creator:: Coleman, Gregory A.
Abstract:: I examined hydrological and plant community changes associated with the implementation of a restoration management plan in two riparian meadows located within an agricultural landscape of the central Willamette Valley, Oregon. I established exclosure fencing (a form of passive restoration) in one agricultural field and established fencing and plugged a...
Resource Type:: Masters Thesis
Full Text:: by intense land management practices (e g., plowing, re-seeding, or removal of dominant plant

Investigating Demographic and Evolutionary Factors Important for Fish Reintroduction

Creator:: Sard, Nicholas M.
Abstract:: Reintroduction programs are used to re-establish species back into their historical habitat. Most reintroduction programs have failed and few papers have evaluated factors that may be important to Pacific salmon. The 158 meter tall Cougar Dam has blocked Chinook salmon (Oncorhynchus tshawytscha) from accessing 40 kilometers of historical spawning and...
Resource Type:: Dissertation
Full Text:: ., Hand, D. M., Olson, D. E., Spateholts, R., FitzGerald, G. , Ardren, W. R. (2008). Use of Parentage

Survival and Home-range Size of Northern Spotted Owls in Southwestern Oregon

Creator:: Schilling, Jason W., Dugger, Katie M., and Anthony, Robert G.
Abstract:: In the Klamath province of southwestern Oregon, Northern Spotted Owls (Strix occidentalis caurina) occur in complex, productive forests that historically supported frequent fires of variable severity. However, little is known about the relationships between Spotted Owl survival and home-range size and the characteristics of fire-prone, mixed-conifer forests of the Klamath...
Resource Type:: Article
Full Text:: been linked to overall fitness of the species (Franklin et al. 2000, Olson et al. 2004, Dugger et al

Relationship Between Wildfire, Salvage Logging, and Occupancy of Nesting Territories by Northern Spotted Owls

Creator:: Clark, Darren A., Anthony, Robert G., and Andrews, Lawrence S.
Abstract:: The northern spotted owl (Strix occidentalis caurina) is one of the most intensively studied raptors in the world; however, little is known about the impacts of wildfire on the subspecies and how they use recently burned areas. Three large-scale wildfires in southwest Oregon provided an opportunity to investigate the short-term...
Resource Type:: Article
Full Text:: . Numerous studies have documented that spotted owl survival, reproduction (Franklin et al. 2000, Olson et al

Survival Rates of Northern Spotted Owls in Post-fire Landscapes of Southwest Oregon

Creator:: Clark, Darren A., Anthony, Robert G., and Andrews, Lawrence S.
Abstract:: We estimated annual survival rates (S) of 23 radio-marked Northern Spotted Owls (Strix occidentalis caurina) at the Quartz and Timbered Rock burns and adjacent areas in southwest Oregon. We used known-fate models in program MARK to test for differences in survival among three groups (owls dwelling inside of burned areas,...
Resource Type:: Article
Full Text:: @oregonstate.edu J. Raptor Res. 45(1):000–000 E 2011 The Raptor Research Foundation, Inc. 0 adopted to

Effects of Habitat Characteristics, Weather and Presence of Barred Owls (Strix varia) on Occupancy Dynamics and Breeding Propensity of Northern Spotted Owls (S. occidentalis caurina) in Mount Rainier National Park

Creator:: Mangan, Anna O.
Abstract:: For over 100 years, National Parks have existed to preserve America’s natural and cultural heritage for current and future generations. As environmental pressures on wildlife and habitats have increased in recent decades, National Park lands have become important protected areas for many threatened and endangered species. Conservation and management of...
Resource Type:: Masters Thesis
Full Text:: be partially attributed to the age and experience of individual owls (Olson et al. 2004, Dugger et

Demography, home range, and habitat selection of northern spotted owls in the Ashland Watershed

Creator:: Schilling, Jason W.
Abstract:: Northern Spotted Owls (Strix occidentalis caurina) inhabit productive forests that historically supported frequent, large, variable-severity fires in the Klamath province of southwestern Oregon occur in complex. The potential for high-severity wildfire remains high throughout this region, so remaining spotted owl habitat is at risk. An adaptive management approach to fire...
Resource Type:: Masters Thesis
Full Text:: …………………………………………………………………...…..98 E. 1). Results for all annual habitat selection models for individual northern spotted

Habitat selection of hatchery and wild juvenile salmonids in Eagle Creek Basin, Oregon

Creator:: Brignon, William R.
Abstract:: To best manage Eagle Creek National Fish Hatchery and minimize any negative impacts that the current hatchery program may be having on Endangered Species Act-listed salmonids in the Eagle Creek Basin, I determined if wild fish are being displaced from preferred habitats by hatchery salmonids Oncorhynchus spp. This thesis had...
Resource Type:: Masters Thesis
Full Text:: . CONTRIBUTION OF AUTHORS Carl B. Schreck, David L. G. Noakes, Howard A. Schaller and Douglas E. Olson assisted

Skin Deep: An Assessment of New Zealand Blue Whale Skin Condition

Creator:: Barlow, Dawn R., Pepper, Acacia L., and Torres, Leigh G.
Abstract:: Skin condition assessment of wildlife can provide insight into individual and population health. Yet, logistics can limit skin condition assessment of large whales. We developed a standardized, quantitative protocol using photographs to assess skin condition of blue whales in New Zealand, and demonstrate the value gained by testing hypotheses, documenting...
Resource Type:: Article
Full Text:: management. A study of 31 60 photo-identified blue whales in New Zealand conducted by Olson et al. (2015

Passive acoustic monitoring of owls: two studies in forested landscapes of the Pacific Northwest

Creator:: Duchac, Leila S.
Abstract:: Nearly all birds communicate through sound, and there has been much study of avian populations and communities using song and other vocalizations. Owls are no exception as they defend territories, advertise for mates, and defend against threats using various vocalizations. However, due to their generally nocturnal habits, some owl species...
Resource Type:: Masters Thesis
Full Text:: e) great horned owls in and around the area burned by the Stouts Creek Fire, Oregon, USA. FFire

An Investigation into the Distribution, Residency Patterns, Population Connectivity, and Abundance of Blue Whales (Balaenoptera musculus) in New Zealand

Creator:: Barlow, Dawn R.
Abstract:: Species conservation depends on robust population assessment. Data on population abundance, distribution, and connectivity are critical for effective management, especially as baseline information for newly documented populations. I describe a pygmy blue whale (Balaenoptera musculus brevicauda) population in New Zealand waters with year-round presence that overlaps with industrial activities. This...
Resource Type:: Masters Thesis
Full Text:: assisted with data collection and reviewed the manuscript. Paula Olson contributed photographic data

Making the Connection: Linking Stress Physiology of Juvenile Northern Spotted Owls to Environmental Variation and Long-term Survival

Creator:: Mikkelsen, Ashlee J.
Abstract:: The northern spotted owl (Strix occidentalis caurina; spotted owl) is of conservation concern and endemic to mature forests of the Pacific Northwest. Adult survival has a strong effect on population growth rate, but juvenile survival and recruitment are also important components of population change. Despite the importance of this life...
Resource Type:: Masters Thesis
Full Text:: Kappas, Chelsea Sink, and Dr. Andrew Olson: you are all wonderful people and I am fortunate to have met

Myxosporidans of rainbow and cutthroat trout broodstocks from Oregon hatcheries

Creator:: Sweet, Diane Ruth
Abstract:: Oregon Department of Fish and Wildlife trout broodstocks from Alsea, Cole Rivers, Klamath, Leaburg, Oak Springs, Roaring River and Willamette Fish Hatcheries were examined for the presence of myxosporidans. Wild fish collected from waters above these hatcheries were also examined. Seven species of myxosporidans were observed in the hatchery broodfish:...
Resource Type:: Masters Thesis
Full Text:: 1977). It also has been re- ported from rainbow trout at Brian Trout Farm (Olson 1977) (Table 4

Long-term Fuel Succession in the Sagebrush-steppe

Creator:: Reis, Schyler Ainsworth
Abstract:: Historically fire has been the primary disturbance factor in the sagebrush-steppe. The settlement of the West by Euro-Americans, grazing by domestic livestock, and the concomitant spread of invasive species have altered the historical fire regime. Understanding the long-term vegetation structure and fuel succession of the various sagebrush-dominated communities of this...
Resource Type:: Masters Thesis
Full Text:: wildlife graduates with whom I commiserated. Thank you Dean Olson. Thank you to all of my friends for

Avian communities in relation to habitat influenced by fire in a sagebrush steppe landscape

Creator:: Noson, Anna C.
Abstract:: Fire suppression in high-elevation sagebrush steppe over the last century has profoundly influenced the structure and complexity of vegetation communities. Although fire is the primary management tool used to restore these areas, the impact of this management practice on associated avian communities is poorly understood. We examined patterns of habitat...
Resource Type:: Masters Thesis
Full Text:: birds in sagebrush habitats on Steens Mountain. Oregon. Variable Parameter Estimate S. E. 95% C

Evaluation of differing anti-predator strategies of three juvenile north Pacific flatfish species

Creator:: Lemke, Jena
Abstract:: Pleuronectid flatfish are generally thought to utilize stereotypical anti-predator behavior to reduce encounters with potential predators, including burial, maintaining a low profile on the bottom, cryptic coloration, and reduced activity. However, a series of laboratory experiments demonstrate significantly different predation rates on juvenile (Age-0) English sole (Parophrys vetulus), northern rock...
Resource Type:: Masters Thesis
Full Text:: juveniles (Olson and Pratt 1973; Pearcy and Meyers 1974; Gunderson et al. 1990). More specifically, I

Hepatic heat shock protein 70 and plasma cortisol levels in rainbow trout after tagging with a passive integrated transponder

Creator:: Feldhaus, Joseph W., Heppell, Scott A., Mesa, Matthew G., and Li, Hiram W.
Abstract:: This study examined the potentially stressful effects of tagging juvenile rainbow trout Oncorhynchus mykiss with passive integrated transponder (PIT) tags by measuring short-term (<120-h) changes in plasma concentrations of cortisol and hepatic heat shock protein 70 (hsp70). In a laboratory experiment, plasma cortisol levels were measured in fish before they...
Resource Type:: Article
Full Text:: . Hermanson, A. K. Mallia, F. H. Gartner, M. D. Provenzano, E. K. Fujimoto, N. M. Goeke, B. J. Olson, and D

Life history and environmental influences on avian incubation and parental care in songbirds

Creator:: Austin-Bythell, Suzanne H.
Abstract:: Patterns of nest attendance behavior by breeding birds represent a parent-offspring trade-off in which adults balance self-maintenance with parental care decisions. Incubation, in particular, is of interest because adults must provide an environment suitable for embryonic development through nest-building and contact-incubation. We evaluated how adult incubation constancy and nest visitation...
Resource Type:: Dissertation
Full Text:: PARENTS DURING INCUBATION Suzanne H. Austin-Bythell, W. Douglas Robinson, and Robert E. Ricklefs

Small mammal and bird abundance in relation to post-fire habitat succession in mountain big sagebrush (Artemisia tridentata ssp. vaseyana) communities

Creator:: Holmes, Aaron L.
Abstract:: Fire is an important disturbance mechanism in big sagebrush (Artemisia tridentata) communities, yet little is known about wildlife population dynamics during post-fire habitat succession. I estimated the abundance of small mammals and birds in relation to fire history in mountain big sagebrush (A.t. spp. vaseyana) communities on the Sheldon National...
Resource Type:: Dissertation
Full Text:: . Condor 105:611-634. Miller, R. F., and E. K Heyerdahl. 2008. Fine scale variation of historical

Greater Sage-Grouse Demography, Habitat Selection, and Habitat Connectivity in Relation to Western Juniper and its Management

Creator:: Olsen, Andrew C.
Abstract:: The expansion of native, woody plants is a global phenomenon with characteristics and effects that are often indistinguishable from exotic invasions. These expansions have largely been driven by altered fire regimes and favorable climatic conditions. In the Great Basin of western North America, expansion of conifers such as western juniper...
Resource Type:: Dissertation

Nest-site selection in cooperatively breeding Pohnpei Micronesian Kingfishers (Halcyon cinnamomina reichenbachii) : does nest-site abundance limit reproductive opportunities?

Creator:: Kesler, Dylan C.
Abstract:: Despite their inherent importance and utility as ecological examples, island species are among the most endangered and least studied groups. Guam Micronesian Kingfishers (Halcyon cinnamomina cinnamomina) exemplify the plight of insular biota as a critically endangered and understudied island bird that went extinct in the wild before they could be...
Resource Type:: Masters Thesis
Full Text:: internal nest cavity (B), and the tree to which the termitarium is attached (C). Length (D), depth (E), and

Defining quantitative stream disturbance gradients and the additive role of habitat variation to explain macroinvertebrate taxa richness

Creator:: Ligeiro, Raphael, Hughes, Robert M., Kaufmann, Philip R., Macedo, Diego R., Firmiano, Kele R., Ferreira, Wander R., Oliveira, Deborah, Melo, Adriano S., and Callisto, Marcos
Abstract:: Most studies dealing with the use of ecological indicators and other applied ecological research rely on some definition or concept of what constitutes least-, intermediate- and most-disturbed condition. Currently, most rigorous methodologies designed to define those conditions are suited to large spatial extents (nations, ecoregions) and many sites (hundreds to...
Resource Type:: Article
Full Text:: macroinvertebrate taxa richness O D h R W a 3 b c O d e a A R R A K R L C D S E 1 t I H ( k d m 1 h

Hawaiian duck (Anas wyvilliana) behavior and response to wetland habitat management at Hanalei National Wildlife Refuge on Kaua'i

Creator:: Malachowski, Christopher P.
Abstract:: The endangered Hawaiian Duck (koloa maoli; Anas wyvilliana), a non-migratory and island-endemic species, experienced a significant population decline during the twentieth century due to factors such as habitat loss, overharvest, introduced mammalian predators, and hybridization with introduced feral Mallards (A. platyrhynchos). A key objective for Hawaiian Duck recovery is to...
Resource Type:: Masters Thesis
Full Text:: ), and Johnsgard (1965). ............. 61 E Behavior and habitat use of Hawaiian Duck broods

News & Views, 1998 Summer

Creator:: Loegering, John P.
Resource Type:: Other
Full Text:: Mrs. John A. Neff, Dr. Don J. Nike, Inc. Olson, Mr. and Mrs. William E. Opp, Mr. and Mrs. Ralph Oriet

Demography and habitat selection of northern spotted owls in post-fire landscapes of southwestern Oregon

Creator:: Clark, Darren A.
Abstract:: Several large wildfires in southwestern Oregon during the summers of 2001 and 2002 provided the opportunity to investigate the impacts of wildfire on northern spotted owls (Strix occidentalis caurina). I used radio-telemetry and demographic surveys to describe demographic performance and habitat selection of spotted owls in the areas burned by...
Resource Type:: Masters Thesis
Full Text:: Page A B C D E F G H I J Error

Rearing conditions and their effects on growth, food conversion, and survival of English sole (Parophrys vetulus Girard)

Creator:: Williams, Steven Frank
Abstract:: This study consisted of determining some of the conditions for culture of young English sole (Parophrys vetulus Girard) in the laboratory. Rearing of the larvae to the juvenile stage was attempted unsuccessfully; techniques used and problems encountered during culture are discussed. Growth of juveniles was studied at combinations of temperatures...
Resource Type:: Dissertation
Full Text:: . Robert Olson and 1r. Davi.l Ransom for identi`'ying metazoan parasites and pathogenic bacteria

Patterns in responses of an amphibian assemblage to wetland restoration

Creator:: Rowe, Jennifer C.
Abstract:: Wetland restoration success in attaining wildlife conservation goals can be confounded by the presence of multiple biological invaders. Wetland management activities typically target invasive plants, but bottom-up responses of higher trophic levels in novel communities are difficult to predict. We surveyed plant and amphibian assemblages at 26 sites enrolled in...
Resource Type:: Masters Thesis
Full Text:: , Doug Markle, Bruce McCune, Dede Olson, Phil Schapker, Brian Sidlauskas, and Richard Van Driesche. I

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co-occurring songbirds

Creator:: Hardt, Braelei M., Ardia, Daniel R., Bashaw, Meredith J., and Rivers, James W.
Abstract:: 1. Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic-pituitary axis functioning, whether its expression trades off with growth, and the degree to which these -relationships vary between species. 2. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic...
Resource Type:: Article
Full Text:: DOI: 10.1111/1365-2435.13116 R E S E A R C H A R T I C L E Experimental brood enlargement

Riparian vegetation and larval Pacific Giant (Dicamptodon tenebrosus) and adult Western Redback (Plethodon vehiculum) salamanders in the Oregon Coast Range

Creator:: Graff, Paula (Paula Hayes)
Abstract:: Riparian areas in the Pacific Northwest provide important biotic and abiotic features, such as down wood, moist microsites, and abundant invertebrate prey that benefit aquatic and terrestrial amphibians. Reported high densities of amphibians from streams and riparian areas in the Pacific Northwest highlight their importance in riparian food webs. Amphibians...
Resource Type:: Masters Thesis
Full Text:: ....................................................................... 103 E Number of terrestrial amphibians detected in riparian areas at 10 sites in the Oregon

Sounds of Indo-Pacific humpback dolphins (Sousa chinensis) in West Hong Kong: A preliminary description

Creator:: Sims, Paul Q., Vaughn, Robin, Hung, Samuel K., and Wuersig, Bernd
Abstract:: Vocalizations of Indo-Pacific humpback dolphins (Sousa chinensis) in west Hong Kong waters were described from 12 recordings in 2010. A broadband hydrophone system recorded sounds. Vocalizations were characterized as broadband click trains, burst pulses, and narrowband frequency modulated sounds, including whistles generally similar to those of some other delphinid cetaceans....
Resource Type:: Article
Full Text:: the manu- script and Joe Olson of Cetacean Research Technology for technical advice throughout, and

Circumpolar Diversity and Geographic Differentiation of mtDNA in the Critically Endangered Antarctic Blue Whale (Balaenoptera musculus intermedia)

Creator:: Sremba, Angela L., Hancock-Hanser, Brittany, Branch, Trevor A., LeDuc, Rick L., and Baker, C. Scott
Abstract:: The Antarctic blue whale (Balaenoptera musculus intermedia) was hunted to near extinction between 1904 and 1972, declining from an estimated initial abundance of more than 250,000 to fewer than 400. Here, we describe mtDNA control region diversity and geographic differentiation in the surviving population of the Antarctic blue whale, using...
Resource Type:: Article
Full Text:: manuscript. Competing Interests: The authors have declared that no competing interests exist. * E-mail

Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon

Creator:: Wiens, J. David
Abstract:: The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...
Resource Type:: Dissertation
Full Text:: ........................................................................................ 130 E. Tracking summaries and fate of 29 northern spotted owls (14 females, 15 males) and 28 barred

Vegetation response to prescribed fire in mountain big sagebrush ecosystems at Lava Beds National Monument, California

Creator:: Ellsworth, Lisa M.
Abstract:: Anthropogenic land use alterations such as livestock grazing and fire suppression have greatly altered sagebrush grasslands of the Great Basin, facilitating invasion of exotic annuals, increases in woody species, and losses of native species. Much of the current research surrounding wildland and prescribed fire in sagebrush dominated ecosystems has focused...
Resource Type:: Masters Thesis

The response to forced decompression in six species of Pacific rockfish

Creator:: Pribyl, Alena L., Kent, Michael L., Parker, Steven J., and Schreck, Carl B.
Abstract:: Pacific rockfish experience high discard mortality when captured owing to a condition called barotrauma,which is caused by the change in pressure during capture. This condition appears to be species specific at the macroscopic level; however, little is known about the microscopic tissue-level effects of barotrauma. Determining whether tissue-level injuries are...
Resource Type:: Article
Full Text:: . Pribyl a b , Michael L. Kent c , Steven J. Parker d e & Carl B. Schreck f a Oregon Cooperative Fish and

Spatiotemporal Associations of Abundance and Vital Rates of Co-occurring Small Mammals in a Late Successional Forest

Creator:: Weldy, Matthew J.
Abstract:: Informed conservation of small mammals, ecosystems, and predators requires a detailed understanding of how small mammals species and communities vary in both space and time, as well as the relative cyclicity and synchrony of this variation. This variation can be especially informative to land managers interested in manipulating the abundance...
Resource Type:: Masters Thesis

News & Views, 1997 Summer

Creator:: Edge, W. Daniel
Resource Type:: Other
Full Text:: great place to work. (See the notice on page 11 if you’d like to get on the e-mail list). We also are

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