Index Catalog // ScholarsArchive@OSU

Mortality threshold for juvenile Chinook salmon (Oncorhynchus tshawytscha) in an epidemiological model of Ceratomyxa shasta

Creator:: Ray, R. Adam
Abstract:: 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...
Resource Type:: Masters Thesis
Full Text:: 24, 2009. Title: Mortality Threshold for Juvenile Chinook Salmon (Oncorhynchus tshawytscha) in an

Human hunting mortality threshold rules for extinction in mammals (and fish)

Creator:: Charnov, Eric L. and Zuo, Wenyun
Abstract:: Question: Are there general life-history rules for exploitation-caused extinction of mammal populations? Mathematical methods: A population of size N faced with the added mortality of human exploitation will deterministically go extinct if its per-capita birth rate can no longer match its per-capita mortality rate as N approaches zero. We develop...
Resource Type:: Article
Full Text:: eel 22496 Human hunting mortality threshold rules for

Wavelet analysis : linking multi-scalar pattern detection to ecological monitoring

Creator:: Anthony, Jill Ada Marie
Abstract:: Wavelet analysis is an analytical and modeling tool for optimizing sampling efficiency and accuracy, particularly in the context of designing long-term, large-scale monitoring plans. As a pattern analysis method that accommodates and preserves non-stationarity, wavelet analysis provides novel visualization and analytical capabilities for increased insight into interactions between multi-scalar heterogeneous...
Resource Type:: Dissertation
Full Text:: and sampling design. Effective monitoring must involve sampling designs sufficiently detailed to

Supplemental data to "Estimating the Genetic Diversity of Pacific salmon and trout using Multi-gene eDNA Metabarcoding"

Creator:: Weitemier, Kevin A.
Abstract:: This dataset contains DNA sequence data of Oncorhynchus species, isolated from environmental DNA (eDNA) from Pacific Northwest streams via microfluidic eDNA metabarcoding and high-throughput (Ilummina) sequencing (samples collected from 2017-09-22 to 2017-10-10). It is accompanied by scripts and commands for data analyses including: sequence denoising, calculation of entropy values by...
Resource Type:: Dataset

Supplemental data to "Casting a broader net: Using microfluidic metagenomics to capture aquatic biodiversity data from diverse taxonomic targets"

Creator:: Hauck, Laura L., Weitemier, Kevin A., Penaluna, Brooke E., Garcia, Tiffany, and Cronn, Richard
Abstract:: This dataset contains the taxonomic classifications of environmental DNA (eDNA) sequences obtained from Fall Creek, Oregon, via microfluidic multiplex PCR (Fluidigm Access Array) and high-throughput sequencing. It is accompanied by electrofishing counts taken at the same time as the eDNA samples. Metadata and R scripts are provided to analyze the...
Resource Type:: Dataset

Bat Monitoring in North Coast and Cascades Network Summer 2019

Creator:: Barnett, Emily, Mock, Rayanne, Grigorov, Anastacia, Levorse, Alexis, and Chestnut, Tara
Abstract:: The detection of white-nose syndrome (WNS) in King County, WA in 2016 prompted the National Park Service to mobilize region-wide bat monitoring and disease surveillance. One of the goals of the Pacific West Region WNS response plan was to implement acoustic monitoring to determine the distribution of bat species and...
Resource Type:: Poster
Full Text:: Monitoring • Bat echolocation calls recorded with Pettersson D500x ultrasonic detectors in potential

Effects of sampling design, estimators, and variability on groundfish management in Oregon

Creator:: Crone, Paul R. Jr
Abstract:: Sampling error associated with estimates of species composition and age composition of commercial groundfish landings in Oregon from 1989 to 1991 is documented to evaluate the impact of variable landing data on fisheries management and monitoring programs. The statistical reliability and bias associated with two multistage sampling designs are investigated...
Resource Type:: Dissertation
Full Text:: as problematic in age-composition sampling; however, caution and additional monitoring procedures

Feasibility of supplementary sampling of the commercial groundfish landings in Oregon using seafood plant workers

Creator:: Builder, Tonya L.
Abstract:: Fishery dependent data--length distributions, sex ratios, maturity schedules, and species composition of landed catches--are necessary for stock assessments. These data are currently collected by state port biologists using a sampling design that randomly selects samples from a small percentage of a very large target population. Sampling programs may need to...
Resource Type:: Masters Thesis
Full Text:: Supplementary Sampling of the Commercial Groundfish Landings in Oregon Using Seafood Plant Workers. Abstract

Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Creator:: Piacenza, Susan E. H.
Abstract:: Green sea turtles, Chelonia mydas, have endangered and threatened populations globally, but several populations show signs of population recovery. In Hawaii, nesting female green turtles have increased 5.7% year⁻¹ since 1973, but wide fluctuations in census counts of nesting females make recovery diagnosis difficult. For effective management planning, it is...
Resource Type:: Dissertation
Full Text:: . Title: Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Resident cutthroat trout in the central Coast Range of Oregon : logging effects, habitat associations, and sampling protocols

Creator:: Connolly, Patrick John, 1955-
Abstract:: Populations of coastal cutthroat trout, Oncorhynchus clarki clarki, were sampled in 16 headwater streams from logged (20-30 and 40-60 years ago) and unlogged (stand age 125-150 years) basins. Basins logged 20-30 years ago supported the widest range of mean biomass of age 1+ or older cutthroat trout (g/m2) and the...
Resource Type:: Dissertation

Mobile Autonomous Passive Acoustic Monitoring of Marine Mammals in the Catalina Basin

Creator:: Edison, Ciera J. and Fregosi, Selene
Abstract:: Traditional visual survey methods for marine mammals can only detect a fraction of the animals present. Even if the animal can be observed from the surface, visual limitations such as time of day and weather conditions can impede this ability. Recent advances in passive acoustic monitoring technologies have led to...
Resource Type:: Poster
Full Text:: Passive Acoustic Monitoring of Marine Mammals in the Catalina Basin Ciera J. Edison and Selene Fregosi

Applications of slow-moving autonomous platforms for passive acoustic monitoring and density estimation of marine mammals

Creator:: Fregosi, Selene
Abstract:: Advances in mobile autonomous vehicles for oceanographic sensing provide new opportunities for passive acoustic monitoring of marine mammals. Acoustically equipped mobile autonomous platforms, including gliders, deep-water profiling floats, and drifting surface buoys can survey for a variety of marine mammal species over intermediate spatiotemporal scales. Additionally, such mobile platforms may...
Resource Type:: Dissertation
Full Text:: : Applications of Slow-moving Autonomous Platforms for Passive Acoustic Monitoring and Density Estimation of

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

Description and prediction of broad-scale spatial variability in expression of anadromy in female Oncorhynchus mykiss in the John Day River, Oregon, USA

Creator:: Mills, Justin S.
Abstract:: Partial migration is a common migratory behavior where some individuals in a population migrate and others do not. Patterns of partial migration can vary dramatically, especially for species that inhabit a wide range of environments. I described and predicted spatial variation in marine migration (anadromy) of female Oncorhynchus mykiss (steelhead...
Resource Type:: Masters Thesis
Full Text:: accuracy (e.g. 68% correctly predicted with a 0.5 classification threshold). Residuals from the models

All in a DNA's work : conservation genetics and monitoring of the New Zealand endemic Maui's and Hector's dolphins

Creator:: Hamner, Rebecca Marie
Abstract:: The critically endangered Maui's dolphin (Cephalorhynchus hectori maui) and the endangered Hector's dolphin (C. h. hectori) are endemic to the coastal waters of New Zealand, where their primary threat is fisheries-related mortality. The Maui's dolphin is among the most critically endangered cetaceans in the world, with its remnant population primarily...
Resource Type:: Dissertation
Full Text:: Monitoring of the New Zealand Endemic Maui’s and Hector’s Dolphins. Abstract approved

Acoustic monitoring reveals the times and tides of harbor porpoise (Phocoena phocoena) distribution off central Oregon, U.S.A.

Creator:: Holdman, Amanda K., Haxel, Joseph H., Klinck, Holger, and Torres, Leigh G.
Abstract:: Harbor porpoises (Phocoena phocoena) are commonly observed in Oregon's nearshore marine environment yet knowledge of their ecosystem use and behavior remains limited, generating concerns for potential impacts on this species from future coastal development. Passive acoustic monitoring was used to investigate spatial and temporal variations in the presence and foraging...
Resource Type:: Article
Full Text:: Acoustic monitoring reveals the times and tides of harbor

Managing adult hatchery summer steelhead for a recreational fishery with reduced hatchery and wild interactions

Creator:: Schemmel, Eva M.
Abstract:: Hatcheries whose purpose is to provide for a recreational fishery must minimize impacts on wild fishes. Management to reduce hatchery and wild interactions is especially important on river systems that contain Endangered Species Act (ESA) listed species. I examined adult hatchery summer steelhead, Oncorhynchus mykiss, behavior, current management and a...
Resource Type:: Masters Thesis
Full Text:: during the 9/2/07-9/3/07 tracking cycle ...................... 34 7. Locations of the fixed monitoring

Reducing Impacts of Double-crested Cormorants to Natural Resources in Central New York: A Review of a Collaborative Research, Management, and Monitoring Program

Creator:: DeVault, Travis L., Chipman, Richard B., Barras, Scott C., Taylor, Jimmy D., Cranker, Carl P. III, Cranker, Elizabeth M., and Farquhar, James F.
Abstract:: Double-crested Cormorants (Phalacrocorax auritus) have used central New York waters for breeding and stopover habitats during migration since 1984. In response to public concern over Oneida Lake, the United States Department of Agriculture Wildlife Services and the New York State Department of Environmental Conservation initiated an integrated research, management and...
Resource Type:: Article
Full Text:: Resources in Central New York: A Review of a Collaborative Research, Management, and Monitoring Program

Predicting the stability, equilibrium response, and nonequilibrium dynamics of ecological systems

Creator:: Hosack, Geoffrey R.
Abstract:: In this dissertation, new theory and its applications are developed to predict three properties of complex ecological communities: stability, equilibrium response, and non-equilibrium dynamics. First, a graph-theoretic analysis identifies the interconnections in a complex ecosystem that promote or diminish stability (Chapter 2). The hierarchy of interactions that influences stability and...
Resource Type:: Dissertation
Full Text:: monitoring, investigate alternative management strategies, and help formulate novel research hypotheses

Investigating temporal patterns of a native bee community in a remnant North American bunchgrass prairie using blue vane traps

Creator:: Kimoto, Chiho, DeBano, Sandra J., Thorp, Robbin W., Rao, Sujaya, and Stephen, William P.
Abstract:: Native bees are important ecologically and economically because their role as pollinators fulfills a vital ecosystem service. Pollinators are declining due to various factors, including habitat degradation and destruction. Grasslands, an important habitat for native bees, are particularly vulnerable. One highly imperiled and understudied grassland type in the United States...
Resource Type:: Article
Full Text:: plateau in northeastern Oregon, using a sampling method not previously used in grassland studies—blue

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