Index Catalog // ScholarsArchive@OSU

Wildlife Health in Managed Forests : Immunity and Infectious Diseases in Wild Rodents of Oregon

Creator:: Hanselmann, Rhea
Abstract:: With continual and worldwide human population growth, our impact on the natural environment expands and intensifies every day. We consume natural resources, burn fossil fuels, and release toxic compounds into the air, water, and earth. We build roads that fragment the landscape, construct new settlements, and develop agricultural lands in...
Resource Type:: Dissertation
Full Text:: Rhea Hanselmann for the degree of Doctor of Philosophy in Zoology presented on August 16, 2016

Trade-offs in a pathogen-rich world : genetic and maternal drivers of variation in costly resistance and immunity in African buffalo (Syncerus caffer)

Creator:: Tavalire, Hannah F.
Abstract:: Disease acts as a powerful selective force in natural systems, driving the rapid evolution of resistance in the host. In the face of a myriad of pathogenic challenges in natural systems, hosts must balance the energetic needs of maintenance and reproduction with costly resistance mechanisms. In this dissertation I will...
Resource Type:: Dissertation
Full Text:: without you! Especially Bree Beechler, Emily Bellis, Trang Dang, Caroline Glidden, Rhea Hanselmann

Hidden dynamics : community ecology and costs of parasite infection in African buffalo (Syncerus caffer)

Creator:: Henrichs, Brian
Abstract:: Most wild animals are concurrently infected with multiple parasite species for most of their lives. These parasite species assemble into rich and diverse communities, with parasites using host tissues for growth and reproduction as well as evolving strategies to evade the host immune system. The net effect of these ecological...
Resource Type:: Masters Thesis
Full Text:: much less data to analyze. Thank you Rhea Hanselmann for all of the detailed edits on first

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

Creator:: Urbina Gonzalez, Jenny Cecilia
Abstract:: This dissertation presents a different approach to understanding how amphibians are responding to disease through ontogeny. Although numerous efforts have been conducted to understand host responses to the fungus Batrachochytrium dendrobatidis (Bd), studies have been restricted to distinct developmental stages. This dissertation provides information on host response to Bd across...
Resource Type:: Dissertation
Full Text:: , Emily Hartfield, Hailey Ohms, Holland Elder, Claire Couch, Alex Davis, Rhea Hanselmann, Katherine

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

Creator:: Bradley, Paul W.
Abstract:: The ongoing worldwide loss of biodiversity has been described as a "biodiversity crisis," "the Anthropocene defaunation," and alternatively "an extinction spasm." More recently, many scientists have come to the conclusion that we are witnesses to Earth's sixth major mass extinction event, which has the potential to fundamentally alter basic ecological...
Resource Type:: Dissertation
Full Text:: , Lillian Tuttle, Erin Gorsich, Bree Beechler, Kaitlin Bonner, Heather Broghton, Rhea Hanselmann, Emily

Dispersal Behavior in African Buffalo (Syncerus caffer) : Tradeoffs Between Nutritional Resources and Disease Exposure

Creator:: Spaan, Robert Steven
Abstract:: Dispersal facilitates population health and maintains resilience in species via gene flow. Adult dispersal occurs in some species, is often facultative, and is poorly understood, but has important management implications, particularly with respect to disease spread. Although the role of adult dispersal in spreading disease has been documented, the potential...
Resource Type:: Masters Thesis
Full Text:: , Bree Beechler, Heather Broughton, Brian Dugovich, Caroline Glidden, Rhea Hanselmann, Abby Sage

The ecology of parasite interactions within Chinook salmon

Creator:: Hurst, Charlene N.
Abstract:: The within-host interactions that can occur as a result of mixed infections in wildlife likely influence the outcome of an infection. We investigated the infection frequency and outcome as well as the potential mechanisms regulating mixed infections with two Ceratonova shasta genotypes within the Chinook salmon host. Previous research in...
Resource Type:: Dissertation

All hosts are not created equal : variation in amphibian responses to an emerging fungal pathogen and why it matters

Creator:: Gervasi, Stephanie S.
Abstract:: Emerging infectious diseases are increasing globally and are a threat to human, wildlife, and ecosystem health. The emerging fungal pathogen, Batrachochytrium dendrobatidis (Bd), or amphibian chytrid fungus, is associated with worldwide amphibian population declines and extinctions. Bd has been found on every continent where amphibians exist and has been documented...
Resource Type:: Dissertation
Full Text:: friends – the ones who have seen the ups and downs: Dave, Rocky, Chris, Ian, Kristina, Jenny, Rhea

Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon

Creator:: Marks-Fife, Chad A.
Abstract:: Red tree voles (Arborimus longicaudus) are a unique species of Arvicoline rodent found in western Oregon and northwest California. Their preferred habitat is mature and old-growth coniferous forest dominated by Douglas-fir (Pseudotsuga menziesii). Tree voles are an important prey item for northern spotted owls and many other predators, but are...
Resource Type:: Masters Thesis
Full Text:: equipment available. Thank you to Rhea Hanselmann for collaborations that provided opportunities for

Disease invasion dynamics : brucellosis and tuberculosis in African buffalo (Syncerus caffer)

Creator:: Gorsich, Erin E.
Abstract:: Emerging infectious diseases in wild animals threaten global biodiversity as well as domestic animal and human health. Their unprecedented increase in conjunction with anthropogenically induced range shifts of endemic pathogens exposes hosts to novel parasite combinations, lending urgency to research on disease dynamics in wildlife systems. In natural populations, hosts...
Resource Type:: Dissertation
Full Text:: , Heather Broughton, Brian Dugovich, Rhea Hanselmann, Rob Spaan, Jo Spaan—and my academic cohort—Angela

ScholarsArchive@OSU

Wildlife Health in Managed Forests : Immunity and Infectious Diseases in Wild Rodents of Oregon

Trade-offs in a pathogen-rich world : genetic and maternal drivers of variation in costly resistance and immunity in African buffalo (Syncerus caffer)

Hidden dynamics : community ecology and costs of parasite infection in African buffalo (Syncerus caffer)

Ontogenetic Shifts in Disease Response in Native and Invasive Anuran Species

Disentangling the Biotic and Abiotic Drivers of the Amphibian Disease Chytridiomycosis

Dispersal Behavior in African Buffalo (Syncerus caffer) : Tradeoffs Between Nutritional Resources and Disease Exposure

The ecology of parasite interactions within Chinook salmon

All hosts are not created equal : variation in amphibian responses to an emerging fungal pathogen and why it matters

Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon

Disease invasion dynamics : brucellosis and tuberculosis in African buffalo (Syncerus caffer)

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