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Articles 1 - 8 of 8
Full-Text Articles in Other Animal Sciences
Dietary Ecology Of Waterfowl Nest Predators In The Prairie Pothole Region: Evaluating Resource Use From Species To Individual Using Stable Isotope Analysis, Grace Barthelmess
Dietary Ecology Of Waterfowl Nest Predators In The Prairie Pothole Region: Evaluating Resource Use From Species To Individual Using Stable Isotope Analysis, Grace Barthelmess
EWU Masters Thesis Collection
Nest predation is a primary factor influencing waterfowl productivity in the Prairie Pothole Region (PPR) of North America. Although this system is intensely managed and studied, research has largely focused on how predators affect waterfowl populations, with comparatively little attention to how predators actually rely on waterfowl as a resource. Understanding predator feeding ecology is therefore critical for informing effective management strategies and interpreting the complexity of predator-prey interactions on this landscape. My objective overall was to elucidate the feeding ecology of nine focal predator species commonly associated with waterfowl nest predation in the Aspen Parkland Ecoregion of the PPR: …
Evaluating Efficacy Of Anti-Batrachochytrium Dendrobatidis Probiotic Treatment On Pacific Chorus Frogs (Pseudacris Regilla) At Current And Modeled Climate Change Temperatures, Autumn N. Holley
EWU Masters Thesis Collection
Amphibian populations are declining due to a variety of threats, including the chytrid fungal pathogen, Batrachochytrium dendrobatidis (Bd), the causative agent of the disease chytridiomycosis. Climate change and other stressors can have complicated interactions with amphibian disease. Some amphibian populations are less susceptible to chytridiomycosis due to factors such as symbiotic skin microbes that may inhibit Bd through secondary metabolites. There have been several attempts to develop probiotics from these symbiotic, antifungal bacteria to provide protection against Bd infection, but these studies have had mixed success. Our study evaluated anti-Bd bacteria isolated from the skin of Pacific chorus frogs (Pseudacris …
Investigation Of Small Mammal Species Richness, Abundance, And Genetic Population Structure On And Around The Eastern Washington University Prairie Restoration Site, Sarah Deshazer
EWU Masters Thesis Collection
Small mammals are an ecologically important component of every landscape on Earth. They are a food source for higher trophic level animals, disperse plant seed and mycorrhizal fungi spore, engineer the landscape through burrowing and foraging activities, and alter plant community composition through selective predation of seed and grain. Studies have shown that small mammals may help facilitate the transition between successive stages in prairie restoration. Eastern Washington University has dedicated 120 acres of campus land to restoration of native prairie habitat. Small mammals can play both a positive and a negative role in restoration, therefore it is important to …
Reconstructing The Ecological Relationships Of Late Cretaceous Antarctic Dinosaurs And How Functional Tooth Morphology Influenced These Relationships, Ian D. Broxson
2022 Symposium
The Sandwich Bluff Formation of the James Ross Basin of Antarctica has recently yielded a group of five late Cretaceous dinosaurs that lived contemporaneously with each other, a first for Antarctica. These five dinosaurs include fragmentary remains of two differently sized elasmarian ornithopods, a possible megaraptor, a hadrosaur, and a nodosaur. In this study we will construct a model of the ecological relationships of late Cretaceous Antarctica. Additionally, we will look at what specific factors allowed this group of four herbivores and a carnivore to coexist in a restricted locality and what niches were filled by each species. Methods to …
The Role Of The Skin Microbiome In Amphibian Pathogen Susceptibility In Turnbull National Wildlife Refuge, Krista S. Dodd
The Role Of The Skin Microbiome In Amphibian Pathogen Susceptibility In Turnbull National Wildlife Refuge, Krista S. Dodd
EWU Masters Thesis Collection
The fungal pathogen, Batrachochytrium dendrobatidis (Bd), has led to the decline and extinction of many amphibian populations, but some bacteria in the skin microbiome can inhibit its growth. In Turnbull National Wildlife Refuge (TNWR) in eastern Washington, Bd is highly prevalent, but the role of the skin microbiome in Bd infection dynamics have not been examined in this region. We hypothesized that frogs with lower Bd infection intensities would have higher skin bacterial diversity and more abundant anti-Bd bacteria, indicative of a more protective function. Our study combined cultureindependent and culture-dependent methods to assess the relationship between Bd and the …
Investigating How Bat Ectoparasites Influence The Skin Microbiome Diversity And Composition In Washington State Bats, Dana E. Colley
Investigating How Bat Ectoparasites Influence The Skin Microbiome Diversity And Composition In Washington State Bats, Dana E. Colley
EWU Masters Thesis Collection
White-Nose Syndrome (WNS), caused by the psychrophilic pathogenic fungus Pseudogymnoascus destructans (Pd), has killed millions of bats in the eastern United States since its initial introduction in 2006 and recent expansion into the western U.S. Understanding factors that contribute to the spread of Pd and risk of infection is crucial for management of WNS. Bat ectoparasites, including bat mites and bat flies, are omnipresent in bat populations, yet the relationship between these ectoparasites and bat health is still unknown. We examined the relationship between bat ectoparasites and the skin microbiome in relation to WNS infection risk in Washington State bats. …
What Makes Bats Special So That They Are Reservoirs For So Many Different Pathogens?, Deion Anderson, Eleanor Gorkovchenko, Nicole Hamada, Carolina Martinez, Lupe Martinez
What Makes Bats Special So That They Are Reservoirs For So Many Different Pathogens?, Deion Anderson, Eleanor Gorkovchenko, Nicole Hamada, Carolina Martinez, Lupe Martinez
2020 Symposium Posters
Bats, order Chiroptera, comprise more than 20 percent of all living mammal species with more than 1100 species. Bats are organisms that have high body temperatures and metabolic rates. Therefore, viral adaptation to febrile conditions in the bat host might explain the high reservoir competence that distinguishes these organisms from other mammalian hosts. The purpose of this study is to present a comparative meta-review of the available evidence in order to investigate and identify the reasons or characteristics as to what makes bats special reservoirs for so many different pathogens. Our investigation will not focus on a particular bat species, …
Bat Activity Over Wetlands: Temporal And Spatial Variation, Sarah Stankavich
Bat Activity Over Wetlands: Temporal And Spatial Variation, Sarah Stankavich
EWU Masters Thesis Collection
"Foraging animals face decisions about when and where to forage based, in part, on prey availability, which can fluctuate temporally as well as spatially. For temperate insectivorous bats, wetlands are important forage habitats because they provide water and high abundances of insects. My overall objective was to identify abiotic and biotic factors that influence bat foraging activity over wetlands in the channeled scablands of eastern Washington. I surveyed 12 wetland sites at Turnbull National Wildlife Refuge (TNWR) in Cheney, Washington, 3 or 4 times during summer 2012. Ten stations were set up at each site to measure insect abundance using …