Index Catalog // ScholarsArchive@OSU

Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Creator:: Hagen, Christian A., Willis, Mitchell J., Glenn, Elizabeth M., and Anthony, Robert G.
Abstract:: The distribution and geographic range of Greater Sage-Grouse (Centrocercus urophasianus) have been reduced by 56% since European settlement. Although loss and fragmentation of sagebrush (Artemisia spp.) habitats have been cited as the primary causes for the decline of the species, degradation of existing habitat also has been considered an important...
Resource Type:: Article

Husbandry stress of Zebrafish, Danio rerio

Creator:: Ramsay, Jennifer Mara
Abstract:: Zebrafish, Danio rerio, are widely used as vertebrate research organisms yet little is know about their responses to husbandry stressors. This dissertation examined the whole-body cortisol responses of zebrafish to husbandry stress. Additionally, the effects of stress on the susceptibility to mycobacteriosis and microsporidiosis (Pseudoloma neurophilia) were determined including effects...
Resource Type:: Dissertation
Full Text:: included my advisors as well as Drs. John Leatherland, Monte Westerfield, Dixon Landers, Staci Simonich

Rapid endangered species assessment : a novel approach to improve extinction risk assessments in poorly known species

Creator:: Bianchi, Carlos A.
Abstract:: The number of endangered species is rapidly increasing while paucity of adequate information and resources delays establishment of conservation actions. The IUCN’s listing system is insufficient to determine conservation priorities and many species lack information even to be evaluated (i.e., “data deficient”). Here I proposed and tested the Rapid Endangered...
Resource Type:: Dissertation

Statistical model selection criteria and their application to the Stock Synthesis assessment program

Creator:: Helu, Siosaia Langitoto
Abstract:: 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 imprecise parameter estimates and tends to increase the subjective role of the modeler, which...
Resource Type:: Masters Thesis
Full Text:: estimates was evaluated in Monte Carlo experiments with the Stock Synthesis program and were compared to a

Estimating vertebrate, benthic macroinvertebrate, and diatom taxa richness in raftable Pacific Northwest rivers for bioassessment purposes

Creator:: Hughes, Robert M., Herlihy, Alan T., Gerth, William J., and Pan, Yangdong
Abstract:: The number of sites sampled must be considered when determining the effort necessary for adequately assessing taxa richness in an ecosystem for bioassessment purposes; however, there have been few studies concerning the number of sites necessary for bioassessment of large rivers. We evaluated the effect of sample size (i.e., number...
Resource Type:: Article
Full Text:: 1,000-run Monte Carlo analyses for each site number to obtain random samples without replacement of 1–20

A simulation model of wood dynamics in Pacific Northwest streams

Creator:: Meleason, Mark Alan
Abstract:: Conceptually, the dynamics of wood in streams can be viewed in terms of input and in-channel processes. Input processes are associated with both the riparian (tree fall, bank cutting, windthrow) and upslope forests (mass failures). In-channel processes include log breakage, movement, and decomposition. A mechanistic view of these processes is...
Resource Type:: Dissertation
Full Text:: Monte Carlo procedure and the results are reported as average conditions per reach. STREAM WOOD was

Oceanographic effects on the dynamics of food habits and growth condition of some groundfish species of the Pacific Northwest

Creator:: Lee, Yong Woo
Abstract:: Marine fish are subject to direct and indirect oceanographic variations operating at short and long time scales. In this study feeding habits and long-term growth condition of several groundfish species of the Pacific Northwest are examined to understand the relationship between variations in the fish's biological and life history components...
Resource Type:: Dissertation

Demography and ecology of southern right whales Eubalaena australis wintering at sub-Antarctic Campbell Island, New Zealand

Creator:: Torres, Leigh G., Rayment, Will, Olavarría, Carlos, Thompson, David R., Graham, Brittany, Baker, C. Scott, Patenaude, Nathalie, Bury, Sarah Jane, Boren, Laura, Parker, Graham, and Carroll, Emma L.
Abstract:: Since the decimation of the southern right whale Eubalaena australis population in New Zealand by whaling, research on its recovery has focused on the wintering ground at the Auckland Islands, neglecting potentially important wintering habitat at Campbell Island. For the first time in 20 years we conducted an expedition to...
Resource Type:: Article

Evaluating the data-poor fishery stock assessment method, DB-SRA

Creator:: Owashi, Brandon R.
Abstract:: Depletion-Based Stock Reduction Analysis (DB-SRA; Dick and MacCall, 2011) is a catch-only fisheries stock assessment model that has been developed to estimate an overfishing limit (OFL) in data-poor situations. DB-SRA projects the biomass trajectories of a stock by means of a catch time series and five parameters: the instantaneous, per...
Resource Type:: Masters Thesis
Full Text:: by the unfished level of biomass. DB-SRA performs a Monte Carlo simulation where a large number of

More than one million barriers fragment Europe’s rivers

Creator:: Belletti, Barbara, Garcia de Leaniz, Carlos, Jones, Joshua, Bizzi, Simone, Börger, Luca, Segura, Gilles, Castelletti, Andrea, van de Bund, Wouter, Aarestrup, Kim, Barry, James, Belka, Kamila, Berkhuysen, Arjan, Birnie-Gauvin, Kim, Bussettini, Martina, Carolli, Mauro, Consuegra, Sofia, Dopico, Eduardo, Feierfeil, Tim, Fernández, Sara, Fernandez Garrido, Pao, Garcia-Vazquez, Eva, Garrido, Sara, Giannico, Guillermo, Gough, Peter, Jepsen, Niels, Jones, Peter E., Kemp, Paul, Kerr, Jim, King, James, Łapińska, Małgorzata, Lázaro, Gloria, Lucas, Martyn C., Marcello, Lucio, Martin, Patrick, McGinnity, Phillip, O’Hanley, Jesse, Olivo del Amo, Rosa, Parasiewicz, Piotr, Pusch, Martin, Rincon, Gonzalo, Rodriguez, Cesar, Royte, Joshua, Schneider, Claus Till, Tummers, Jeroen S., Vallesi, Sergio, Vowles, Andrew, Verspoor, Eric, Wanningen, Herman, Wantzen, Karl M., Wildman, Laura, and Zalewski, Maciej
Abstract:: Rivers support some of Earth’s richest biodiversity and provide essential ecosystem services to society, but they are often fragmented by barriers to free flow. In Europe, attempts to quantify river connectivity have been hampered by the absence of a harmonized barrier database. Here we show that there are at least...
Resource Type:: Article

ScholarsArchive@OSU

Habitat Selection by Greater Sage-Grouse During Winter in Southeastern Oregon

Husbandry stress of Zebrafish, Danio rerio

Rapid endangered species assessment : a novel approach to improve extinction risk assessments in poorly known species

Statistical model selection criteria and their application to the Stock Synthesis assessment program

Estimating vertebrate, benthic macroinvertebrate, and diatom taxa richness in raftable Pacific Northwest rivers for bioassessment purposes

A simulation model of wood dynamics in Pacific Northwest streams

Oceanographic effects on the dynamics of food habits and growth condition of some groundfish species of the Pacific Northwest

Demography and ecology of southern right whales Eubalaena australis wintering at sub-Antarctic Campbell Island, New Zealand

Evaluating the data-poor fishery stock assessment method, DB-SRA

More than one million barriers fragment Europe’s rivers

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