Digital Commons Network^™

Occupancy And Activity Patterns Of Nine-Banded Armadillos (Dasypus Novemcinctus) In A Suburban Environment, Brett Degregorio, Matthew R. Mcelroy, Emily P. Johansson

Biological Sciences Faculty Publications and Presentations

The geographic range of the nine-banded armadillo (Dasypus novemcinctus) has rapidly been expanding within the United States for the last 150 years. One of the factors contributing to this astounding range expansion is the species’ ability to survive in and colonize human-dominated areas. Despite the fact that armadillos live alongside humans in numerous towns and cities across the Southeastern, Southcentral, and now Midwestern United States, we know relatively little about the behavior and ecology of armadillos in human-developed areas. Here, we used motion-triggered game cameras in over 115 residential yards in the rapidly developing Northwest corner of Arkansas …

Research Note: Isolation, Speciation, And Anticoccidial Sensitivity Of Eimeria Spp. Recovered From Wild Turkey Feces In The United States, Carolina Trujillo-Peralta, Aaron Ashcraft, Roberto Señas-Cuesta, Makenly Coles, Xochitl Hernandez-Velasco, Callie Selby, Aaron Forga, Guillermo Tellez-Isaias, Christine Vuong, Lisa Bielke, John R. Barta, Billy Hargis, Danielle Graham

Poultry Science Faculty Publications and Presentations

Between 2018 and 2020, over 100 wild turkey fecal samples were collected from the Eastern and Central thirds of the United States, where commercial turkey production is uncommon. We hypothesized that anticoccidial-sensitive Eimeria spp. would be present in wild turkey fecal samples. Samples containing Eimeria spp. oocysts were amplified in vivo. If propagation was successful, the samples were PCR-speciated and subjected to anticoccidial sensitivity testing (AST) for key members of both ionophore and chemical categories of anticoccidial drugs. The purpose of this study was to isolate Eimeria spp. relevant to commercial turkey production that possessed sensitivity to monensin, …

Assessing The Effects Of A Mixed Eimeria Spp. Challenge On Performance, Intestinal Integrity, And The Gut Microbiome Of Broiler Chickens, Danielle Graham, Victor Petrone-Garcia, Xochitl Hernandez-Velasco, Makenly E. Coles, Marco A. Juarez-Estrada, Juan D. Latorre, Jianmin Chai, Stephanie Shouse, Jiangchao Zhao, Aaron Forga, Roberto Señas-Cuesta, Lauren Laverty, Kristen Martin, Carolina Trujillo-Peralta, Ileana Loeza, Latasha Gray, Billy M. Hargis, Guillermo Tellez-Isaias

Poultry Science Faculty Publications and Presentations

A mixed Eimeria spp. challenge model was designed to assess the effects of challenge on broiler chicken performance, intestinal integrity, and the gut microbiome for future use to evaluate alternative strategies for controlling coccidiosis in broiler chickens. The experimental design involved broiler chickens divided into two groups: a control group (uninfected) and a positive control group, infected with Eimeria acervulina (EA), Eimeria maxima (EM), and Eimeria tenella (ET). At day-of-hatch, 240 off-sex male broiler chicks were randomized and allocated to one of two treatment groups. The treatment groups included: (1) Non-challenged (NC, n = 5 replicate pens); and (2) challenged …

Challenges And Opportunities In Achieving Sustainable Mud Crab Aquaculture In Tropical Coastal Regions, Elina Apine, Prashanth Ramappa, Ramachandra Bhatta, Lucy M. Turner, Lynda D. Rodwell

School of Biological and Marine Sciences

Aquaculture plays a significant role in food security and provides livelihoods and employment for millions of people among coastal communities worldwide. However, the growing aquaculture sector has also created debates around its long-term ecological sustainability, economic viability, potential social inequalities and governance issues. We investigated the perceived challenges and opportunities to achieving sustainable mud crab aquaculture in tropical coastal regions by using the case study of coastal mud crab farms in Andhra Pradesh, India. Informed by perceptions and indicative financial data from a sample of stakeholders we investigated the potential economic outcomes under different scenarios representing varying yield levels, risk …

An Extended Mtdna Phylogeography For The Alpine Newt Illuminates The Provenance Of Introduced Populations, J Robbemont, Veldhuijzen S Van, J.R. A Steven, J Ambu, R Boyle, D Canestrelli, M Cvijanović, C Dufresnes, C Ennis, R Gandola, D Jablonski, A Julian, D Kranželić, S Lukanov, I Martínez-Solano, R Montgomery, B Naumov, M O’Neill, N Alexandra, M Pabijan, R Puschendorf, D Salvi, B Schmidt, K Sotiropoulos, F Stanescu, D Stanković, S Stapelton, E Šunje, M Szabolcs, E Vacheva, D Willis, A Zimić, J France, Wrm Meilink, T Stark, Rpjh Struij, A Theodoropoulos, Visser1 Mc De, B Wielstra

School of Biological and Marine Sciences

Many herpetofauna species have been introduced outside of their native range. MtDNA barcoding is regularly used to determine the provenance of such populations. The alpine newt has been introduced across the Netherlands, the United Kingdom and Ireland. However, geographical mtDNA structure across the natural range of the alpine newt is still incompletely understood and certain regions are severely undersampled. We collect mtDNA sequence data of over seven hundred individuals, from both the native and the introduced range. The main new insights from our extended mtDNA phylogeography are that 1) haplotypes from Spain do not form a reciprocally monophyletic clade, but …

Surface-Functionalized Silica Nanocarriers For Mitigating Water Stress In Wheat And Benefiting The Root Microbiome, Anthony Cartwright

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Changes in climate and shifting patterns of drought threaten the growth of important cash crops like wheat. The element silicon serves as a plant nutrient and shows promise for strengthening wheat against drought while remaining safe to both the crop and the positive bacteria that grow on its roots. Silicon can be added to wheat in the form of silicon-dioxide nanoparticles featuring protective coatings made from plant-beneficial nutrients. These nanoparticles can be engineered with high surface area or porous structures allowing them to be loaded with additional nutrients that can be delivered to crops. In a laboratory setting, such nanoparticles …

Temporally Weighted Averaging: The Effects Of Test Delay On Spontaneous Recovery Of Choice, Jack Van Allsburg

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Foraging animals in natural environments must track the value of different behavioral options in order to make decisions that maximize their food intake. The process by which they track this value is poorly understood, but holds relevance for our understanding of how animals make choices in general. In a series of experiments conducted in operant chambers, we put rat subjects in a choice scenario where they could press two levers, one of which would intermittently produce the delivery of food pellets on a rich (more frequent) schedule, while the other would do the same on a lean (less frequent) schedule. …

Consumption Of A Western Diet Enhanced Colitis-Associated Colorectal Cancer And Dysbiosis Of The Fecal Microbiome In Mice Notwithstanding Dietary Intervention Or Fecal Microbiome Transfer, Daphne Michelle Rodriguez Jimenez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In a rodent model of inflammation-associated colorectal cancer, consumption of a Western-style diet increases gut inflammation and enhances risk of developing colon tumors. The goal of this dissertation was to understand the contribution of bacteria within the large intestine on colon inflammation and colon tumorigenesis. Two pre-clinical animal studies were performed using two different intervention strategies to shift the microbiome, and potentially gut inflammation and tumor development: 1) an experiment using dietary supplementation with black raspberries, a functional food enriched in bioactive anthocyanins with purported antiinflammatory activity, and 2) an experiment using fecal microbiota transfer from mice fed a healthy …

Multispecies Genomic Sex Identification Using Ddx3 Gene Polymorphisms, Jessica Felts

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

PCR sex determination assays must be reliable and cost effective due to the frequent and integral use of these assays in biological research and the animal production industry. Thus, the design of proof of a primer pair with a built-in control is warranted to not only bypass the extra cost of a multiplex reaction, but also to prevent anomalous results that have been documented with other primer pairs.

The objective of this study was to design primer pairs with built in PCR amplification control to identify sex in Equus caballus (domestic horse), Homo sapiens (humans), Macaca mulatta (rhesus macaque), and …

Investigating Mitochondrial Influence On The Rate Of Anaerobic Glycolysis In An In Vitro Model, Mackenzie Jenna' Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The rate at which the muscle acidifies after an animal is harvested has a profound effect on the quality of the resulting pork. When acidification increases gradually, desirable pork quality characteristics are developed. In contrast, rapid acidification deteriorates pork quality, exemplified by the pale, soft, and exudative (PSE) pork defect. The rate of acidification is determined by the rate of anaerobic metabolism in postmortem muscle. Yet the processes controlling postmortem anaerobic metabolism are not well understood. Recent research suggests that mitochondria, the powerhouse of the cell, may influence this process by competing for substrate (pyruvate) with anaerobic metabolism, thereby reducing …

Water Conservation Through Drought-Resilient Landscape Plants And Deficit Irrigation, Ji-Jhong Chen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increases in urban population and inadequate rainfall result in imbalanced water budgets in urban and sub-urban regions. Water conservation becomes important in urban landscapes because of increased water demands. Modern landscape designs require drought-resistant plants to maintain urban landscape greenness during water scarcity. Irrigating plants at their irrigation requirements, which is the minimum irrigation rate that can achieve acceptable aesthetic quality, can also conserve water. However, the drought tolerance and irrigation requrements of most landscape plants have not been widely evaluated. Shepherdia ×utahensis ‘Torrey’ (‘Torrey’ buffaloberry) and Penstemon species (beardtongues) are low-water-use landscape plants, but their drought resistance mechanisms are …

Fremont Legacy In Capitol Reef And The Waterpocket Fold: A Radiocarbon Analysis Of The Pectol Collection Coiled Basketry Using Bayesian Modeling, Chelsea Cheney

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Perishable artifacts provide ample opportunity to better understand past human lives. Artifacts constructed from shorter-lived plant materials can make a significant contribution to archaeological research through radiocarbon dating. Analyzing and radiocarbon dating the basketry construction types from the Pectol Collection aids in the development of a more precise prehistoric timeline for the Capitol Reef and Waterpocket Fold (CRWF) area of southeastern Utah. Basketry technology construction is treated as a signal for growing Fremont occupancy throughout the Colorado Plateau and eastern Great Basin, and can the provide prior information used to better organize Bayesianbased age models. From AD 750–1050, a narrow …

Exploring Versatile Glycosyltransferases From Microorganisms For Natural Product Biosynthesis, Jie Ren

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation is mainly focused on exploring versatile glycosyltransferases from different microorganisms with the purpose of biosynthesizing bioactive natural product glycosides through microbial fermentation. This engineered biosynthesis approach is environmentally friendly, safe, and efficient compared with plant extraction, chemical synthesis, and enzymatic synthesis. Additionally, we applied these characterized glycosyltransferases as efficient biocatalytic tools to produce novel glycosides to expand the chemical repertoire of nature. These novel compounds showed improved water solubility and some of them exhibited enhanced stability and biological activity, which laid the foundation for the development of new therapeutic agents.

In my dissertation research, I have discovered two …

Decolonizing Memory: Erasure And Resurgence Of Indigenous History In The Intermountain West, Chase Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Decolonizing language, memory, and history is an important step in confronting dominant historical narratives in higher education and the general public. This paper focuses on the settlement of the US Intermountain West – where the violent roots of white settlement have been downplayed in the public historical consciousness through the dominant narrative of "pioneer heritage." Beginning with a study of Ogden, Utah, early histories of the area are reexamined, analyzing the contexts in which Native peoples are mentioned (or not) in order to understand their presence by the turn of the twentieth century. Next, my focus moves on to analysis …

A Mechanistic Examination Of Interspecific Competition Between Wild And Domestic Herbivores, Courtney Check

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large herbivores, such as mule deer and cattle have similar life histories and likely compete for resources. However, quantifying the extent to which these species compete and the specific resources they compete for has proved challenging. My research examines if cattle influence deer abundance and behavior due to competition for forage, competition for shade, and/or by affecting the predation risk of deer. Using a grid of autonomous trail cameras, I was able to determine if cattle abundance influences local deer abundance in relation to specific resources and habitat features. Using GPS data from collared deer, I was also able to …

From Flames To Forage: How Wildfire Affects Elk Behavior And Abundance, Megan M. Whetzel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Rocky Mountain elk (Cervus elaphus nelsoni) is an ecologically and culturally important wildlife species in the Intermountain West, but it is facing habitat changes caused by increasing fire activity. Wildfire frequency is projected to continue to change into the future, yet increases in annual area burned and increases in area burned at high severity may actually represent opportunities for some species. Large herbivores like elk may benefit from increased access to regenerating areas where forage abundance and quality are often elevated. Therefore, effective management of wildlife populations may depend on quantifying how large ungulates, like elk, alter …

The Intersections Of Payments For Ecosystem Services, Gender, And Conditionality In A Bolivian Case Study, Alicia Potter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Payments for Ecosystem Services (PES) have gained traction since the 1990s and are designed to provide cash or in-kind incentives to natural resource managers who alter land management behavior to protect ecosystem services. Conservation programs generally are known to interact with household and community gender dynamics. For other types of cash transfers, recent literature has noted that presence of conditionality (a key aspect of PES) may create or reinforce gender inequalities, which often manifest in household divisions of labor and decision-making where women may be obligated to complete more unpaid work or experience less control over resources.

Based on a …

Quantifying The Impacts And Assessing The Permeability Of A Divided Four-Lane Highway On Migratory Mule Deer, Daniel P. Taylor

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Increased human development and expansion has led to an ever-growing transportation network, which has both direct and indirect ecological impacts to local wildlife populations. In response, wildlife crossing structures have become an increasingly fundamental component of wildlife conservation throughout the United States. The focus of this study was a 13.5 km section of US Highway 395, Mono County, California. The California Department of Transportation recently identified this section of highway, hereafter known as the Mammoth Wildlife Crossing, as the highest priority location for wildlife crossing structures along US 395 within Mono County. The goal of this study was to use …

Happy Or Sad? Quaking Aspen (Populus Tremuloides Michx.) On Cedar Mountain, Southern Utah, Jaycee Cappaert

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Quaking aspen forests are important communities in the western United States where they provide preferential food and habitat for animals, limit wildfires from spreading, and have favorable aesthetics, among other things. Their putative decline is an issue for ecology and management. We remeasured the aspen population on Cedar Mountain, Utah, to assess changes to its condition since it was originally surveyed in 2008. We found that the area comprised of stable aspen (>80% aspen) decreased from 84.3% to 69.7%. The amount of mortality has increased slightly over the last decade, but crown dieback has stayed virtually identical. Additionally, the …

Comparative Study Of Clustering Techniques On Eye-Tracking In Dynamic 3d Virtual Environments, Scott Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Eye-tracking has been used for decades to understand how and why an individual focuses on particular objects, areas, and elements of space. A vast body of knowledge exists on how eye-tracking is measured. However, historically, eye-tracking has been predominately studied using 2D environments, with limited work in 3D environments. The purpose of this study is to identify which methods most accurately represent the areas that have captured the participant’s visual attention within a 3D dynamic environment. This will be completed by evaluating different clustering methods of fixations using a customized virtual reality tool that collects eye-tracking data. There exist several …

Population Physiology, Demography, And Genetics Of Side-Blotched Lizards (Uta Stansburiana) Residing In Urban And Natural Environments, Spencer B. Hudson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wildlife populations across the globe are poised to lose their natural habitat to urbanization, yet there is limited information on how different species handle living in cities. Animals in urban environments are often susceptible to novel stressors, which can threaten their individual health and population viability. The physiological characteristics of animals, such as those related to metabolic hormones, oxidative stress, and immunity, are expected to be important for survival in this context. If so, animals persisting in urban areas may demonstrate physiological differences from their natural counterparts, perhaps due to evolutionary change. These potential outcomes have been documented in birds …

Co-Creating Culturally Inclusive Climate Change Programming: A Qualitative Study With Indigenous Populations In Southeast Utah, Bayli R. Hanson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study explores the impact of climate change on underrepresented communities, particularly Indigenous populations in the Colorado Plateau region, and the negative effects on their cultural identities and traditional practices. Despite their knowledge and connection to the land, Indigenous communities are experiencing climate change at a more extreme rate due to their geographical location and the lasting impacts of settler colonialism. The study aims to better understand Indigenous perspectives of climate change, co-create a climate change curriculum with Indigenous populations in southeastern Utah, and apply it to an Indigenous-centric field experience. By incorporating traditional ecological knowledge and Western science practices, …

Mountain Lion (Puma Concolor) And Feral Horse (Equus Ferus) Interactions: Examining The Influence Of A Non-Native Ungulate On Predator Behavior In A Semi-Arid Environment, Peter C. Iacono

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A non-native is a species that evolved in one ecosystem and has established within another. Non-native species can thrive in new ecosystems as they can spread quickly, outcompete and replace native species, and disrupt food webs. Domestic horses were brought to North America by Europeans in 1493. They are now found in 11 states across the western United States. Feral horses can negatively impact vegetation, endangered species habitat, compete with native species, and be important prey for mountain lions under certain conditions. But do feral horses affect the food web? Feral horses are managed by large removals to reduce the …

Subduing The Wolf: Utah Pioneer Identity And The War On Wolves Between 1852 And 2020., Mason Lytle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Utah has a unique history of pioneer settlement connected to the Church of Jesus Christ of Latter-day Saints. This history has become a source of pride that began with the first white settlers. I have come to call this the “deseret pioneer” identity, to differentiate from other western settlers. From the nineteenth to the twenty-first century, politicians and agriculturalists used this “deseret pioneer” identity to thwart federal protections for wolves and respond to wilderness policies that made Utah the only “rocky-mountain” state to not have wolves in the twenty-first century.

Impact Of Forage Conditioner Systems On The Harvesting Of Alfalfa, Derrick Hendry

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study analyzed three major brands of conditioner rollers and determined how they performed in drying the forage crop alfalfa. Each type of conditioner roller would cut a wide and narrow windrow. All the windrows were tested and analyzed the same. The study was concluded once the forage was baled.

Effect Of Shock Tunnel Geometry On Shockwave And Vortex Ring Formation, Propagation, And Head On Collision, Rachel L. Bauer, Emily M. Johnson, Alexander D. Douglas, Catherine E. Johnson

Mining Engineering Faculty Research & Creative Works

Vortex ring research primarily focuses on the formation from circular openings. Consequently, the role of tunnel geometry is less understood, despite there being numerous research studies using noncircular shock tunnels. This experimental study investigated shockwaves and vortex rings from different geometry shock tunnels from formation at the tunnel opening to head on collision with another similarly formed vortex ring using schlieren imaging and statistical analysis. The velocity of the incident shockwave was found to be consistent across all four shock tunnel geometries, which include circle, hexagon, square, and triangle of the same cross-sectional area. The velocity was 1.2 ± 0.007 …

Decisive Determinants Shaping Nomadic Tourism Future Development: The Case Of Shahsavan Tribes In Iran, Vali Nemati, Sarasadat Makian, Farid Hanifezadeh, Amir Hossein Qezelbash

Journal of Global Hospitality and Tourism

Nomadic livelihood is one of the earliest human ways of life, still practiced in some parts of the world. Since adventurous tourists are looking for new experiences, nomadic tourism in the postmodern era is gaining attention, considering nomads’ unique lifestyles, customs, clothing, and other cultural features. Consequently, countries with nomads can diversify their tourism industry and the local economy in the future. However, Iran's nomadic community is experiencing unfavorable living conditions and insufficient financial resources, necessitating a shift in nomadic livelihood patterns. This study aims to identify and prioritize the factors that influence the development of nomadic tourism as a …

Evaluating Non-Pharmacological Approaches To Nursing Home Dementia Care: A Protocol, Natalie E Leland, Victoria Shier, Catherine V. Piersol, Cara Lekovitch, Jenny Martínez, Yuna H Bae-Shaaw, Neeraj Sood, Claire Day, Paul Cass, Dominique Como, Carin Wong, Felicia Chew

Department of Occupational Therapy Faculty Papers

BACKGROUND: The COVID-19 pandemic has underscored the daily challenges nursing home (NH) staff face caring for the residents living with Alzheimer's Disease and Related Dementias (

METHODS: This clustered randomized trial will compare

CONCLUSION: This trial will be the first-ever evaluation of team- and problem-based approaches to ADRD care across multiple NHs and geographic regions. Results can provide health system leaders and policymakers with evidence on how to optimize ADRD training for staff in an effort to enhance ADRD care delivery.

Synergy And Antagonism In Log-Linear Models, Md Nahid Hasan

UNLV Theses, Dissertations, Professional Papers, and Capstones

Synergy and antagonism have been extensively studied in the context of the statistical analysis of drug combinations given to treat a disease. “Synergy” (“antagonism”, resp.) in a drug combination occurs when the desirable effect of two drugs given together for treating a disease is greater than (less than, resp.) the effect of each drug given separately.

In this dissertation, however, we study “synergy” and “antagonism” in log-linear models. We also give a thorough review and extend several epidemiological definitions of synergy and antagonism for categorical data, and we connect these definitions to the definitions of synergy and antagonism in log-linear …

Instructional Practices That Foster Argumentative Discourse In Secondary Science Classrooms, Alicia N. Herrera

UNLV Theses, Dissertations, Professional Papers, and Capstones

To remain competitive in an innovative world, American classrooms are promoting careers in science, technology, engineering, and mathematics (STEM) by utilizing the Next Generation Science Standards (NGSS). Students are engaged in inquiry by applying scientific practices like argumentation. However, science teachers are finding it difficult to respond to, as well as deepen students’ argumentative conversations. Therefore, research must uncover what instructional practices (or combinations) are used to overcome classroom obstacles, along with fostering students’ discourse and sensemaking. A teacher research approach was taken to investigate how the researcher, a secondary science teacher herself, effectively combines three under-researched instructional practices for …