Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Ecology and Evolutionary Biology (1159)
- Animal Sciences (663)
- Medicine and Health Sciences (655)
- Cell and Developmental Biology (636)
- Biochemistry, Biophysics, and Structural Biology (629)
-
- Physical Sciences and Mathematics (563)
- Genetics and Genomics (552)
- Integrative Biology (487)
- Microbiology (479)
- Plant Sciences (476)
- Molecular Biology (343)
- Terrestrial and Aquatic Ecology (336)
- Cell Biology (327)
- Environmental Sciences (319)
- Genetics (274)
- Physiology (273)
- Marine Biology (257)
- Social and Behavioral Sciences (252)
- Neuroscience and Neurobiology (243)
- Biochemistry (237)
- Immunology and Infectious Disease (215)
- Education (204)
- Biodiversity (195)
- Entomology (186)
- Bioinformatics (182)
- Plant Biology (178)
- Evolution (171)
- Zoology (169)
- Institution
-
- University of New Mexico (437)
- Utah State University (388)
- University of Central Florida (339)
- Portland State University (302)
- Louisiana State University (261)
-
- Western Michigan University (225)
- University of Richmond (212)
- City University of New York (CUNY) (209)
- University of South Florida (203)
- Virginia Commonwealth University (202)
- Montclair State University (197)
- University of Mississippi (192)
- Western University (192)
- University at Albany, State University of New York (188)
- University of Texas Rio Grande Valley (183)
- Georgia Southern University (172)
- Loyola University Chicago (167)
- University of Texas at El Paso (161)
- Washington University in St. Louis (148)
- The University of Southern Mississippi (142)
- Wright State University (138)
- Eastern Illinois University (134)
- University of the Pacific (131)
- Brigham Young University (130)
- Loma Linda University (126)
- Fort Hays State University (123)
- Morehead State University (121)
- East Tennessee State University (116)
- University of South Carolina (116)
- University of Kentucky (113)
- Keyword
-
- Biology (236)
- Ecology (142)
- Biological sciences (140)
- Department of Biological Sciences (135)
- Climate change (113)
-
- Evolution (113)
- Cancer (97)
- Conservation (89)
- Behavior (83)
- Drosophila (80)
- Genetics (77)
- Gene expression (68)
- Development (67)
- ETD (65)
- Apoptosis (63)
- Invasive species (62)
- Biogeography (60)
- Bacteria (57)
- Zebrafish (55)
- Biodiversity (53)
- Stress (53)
- Fish (52)
- Metabolism (52)
- Restoration (51)
- Morphology (50)
- Physiology (50)
- Habitat (49)
- Microbiology (49)
- Phylogeography (48)
- Drosophila melanogaster (46)
- Publication Year
- Publication
-
- Theses and Dissertations (771)
- Electronic Theses and Dissertations (692)
- Honors Theses (643)
- Master's Theses (603)
- Masters Theses (535)
-
- Biology ETDs (436)
- Dissertations and Theses (342)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (324)
- Dissertations (234)
- USF Tampa Graduate Theses and Dissertations (203)
- Theses, Dissertations and Culminating Projects (197)
- Electronic Thesis and Dissertation Repository (192)
- Open Access Theses & Dissertations (161)
- Biology Theses (144)
- Browse all Theses and Dissertations (138)
- Arts & Sciences Electronic Theses and Dissertations (131)
- University of the Pacific Theses and Dissertations (131)
- Dissertations, Theses, and Capstone Projects (127)
- Loma Linda University Electronic Theses, Dissertations & Projects (126)
- Morehead State Theses and Dissertations (121)
- Legacy Theses & Dissertations (2009 - 2024) (110)
- Dissertations & Theses (Open Access) (108)
- WWU Graduate School Collection (102)
- Theses and Dissertations (Comprehensive) (96)
- Biological Sciences (94)
- Theses (94)
- Seton Hall University Dissertations and Theses (ETDs) (89)
- Honors College Theses (88)
- Retrospective Theses and Dissertations (87)
- MSU Graduate Theses (85)
- File Type
Articles 211 - 240 of 10778
Full-Text Articles in Biology
The Influence Of Polystyrene Microplastics On Juvenile Steelhead Trout (Oncorhynchus Mykiss), Kaitlyn Marie Baker
The Influence Of Polystyrene Microplastics On Juvenile Steelhead Trout (Oncorhynchus Mykiss), Kaitlyn Marie Baker
Dissertations and Theses
Mass production of plastic within the past decade has led to over 100 billion tons of plastics being added to the world’s oceans through rivers and effluent disposal and decomposition. For marine environments, the sudden and constant growth of microplastics (plastics 1 µm to 5 mm in diameter), is of particular concern to top-predatory fish such as steelhead trout (Oncorhynchus mykiss), who passively or actively uptake microplastics while consuming prey. Previous research has demonstrated clear detrimental impacts of microplastic accumulation in bivalves, seabirds, and zebrafish, including decreased diet, reproduction rates, and metabolism, as well as increased rates of …
Instructors At A Crossroad: Perceptions Of Collaboration And Support Intersect With Intentions To Implement A Cure, Justin Berl
Instructors At A Crossroad: Perceptions Of Collaboration And Support Intersect With Intentions To Implement A Cure, Justin Berl
Dissertations and Theses
An ongoing crisis of student drop-off from undergraduate science, technology, engineering and mathematics (STEM) education has led to a sustained call over the last 15+ years for the increased implementation of updated practices in undergraduate STEM education. Though over the past few decades many researchers have developed and analyzed the efficacy of various evidence-based teaching practices (EBTPs) designed to improve the state of undergraduate STEM education throughout the country, the rate at which these EBTPs are implemented in undergraduate STEM classrooms remains low.
In order to better understand the specific factors that affect individual instructors' efforts to implement EBTPs, we …
Resistance To Dna Interstrand Crosslinks In Escherichia Coli Arises Through Prevention Rather Than Repair, Travis Kim Worley
Resistance To Dna Interstrand Crosslinks In Escherichia Coli Arises Through Prevention Rather Than Repair, Travis Kim Worley
Dissertations and Theses
DNA interstrand crosslinks are particularly lethal lesions that form in DNA when certain molecules intercalate between complementary strands of DNA and form covalent bonds with both strands. Once formed, these lesions present an absolute block to replication and transcription, ultimately resulting in cell death. Because of this lethality, chemicals that form DNA interstrand crosslinks are found in nature as defensive chemicals produced by plants and microbes. Moreover, crosslinking agents have proven effective the treatment of dysplastic conditions and are often first line chemotherapeutics.
However, cancer cells can become resistant to DNA interstrand crosslinks. Unlike other DNA lesions, the double-stranded nature …
The Detectability Of Atlantic Salmon (Salmo Salar) Microsatellite And Mitochondrial Environmental Dna, Simone N. Miklosi
The Detectability Of Atlantic Salmon (Salmo Salar) Microsatellite And Mitochondrial Environmental Dna, Simone N. Miklosi
Electronic Thesis and Dissertation Repository
Little is known about what information can be gathered from microsatellite eDNA. It is important to gain a deeper understanding of the detectability and analysis of microsatellite eDNA because it could provide information about population size that mitochondrial eDNA cannot. Water samples were collected from tank and river experiments, and rivers known to contain Atlantic salmon (Salmo salar) and analyzed for Atlantic salmon mitochondrial and microsatellite eDNA. Mitochondrial eDNA was detected from all the tank experiments and 10 out of 15 rivers known to contain Atlantic salmon. Microsatellite eDNA was detected from all the tank experiments and none …
The Dangers Of Staphylococcus Aureus And Antimicrobial Resistance, Madison Pines
The Dangers Of Staphylococcus Aureus And Antimicrobial Resistance, Madison Pines
Graduate Student Dissertations, Theses, Capstones, and Portfolios
Methicillin-resistant Staphylococcus aureus (MRSA) is the etiological agent responsible for many problematic infections. The signs and symptoms of an infection caused by MRSA differ based on the route of transmission and type of infection. Staphylococcus aureus can secrete toxins that act as virulence factors and aid host invasion. Obesity, old age, being a health care worker, playing contact sports, living in a crowded place, hospitalization, recent antibiotic use, and HIV patients are more at risk of developing an infection caused by MRSA. An abundance of factors has contributed to antimicrobial resistance, like misuse of antibiotics in clinical and agricultural settings …
Impact Of Retinoic Acid Receptor Alpha Conditional Knockout On Ovarian Follicle Development In The Mouse, Zlata Bogin
Impact Of Retinoic Acid Receptor Alpha Conditional Knockout On Ovarian Follicle Development In The Mouse, Zlata Bogin
College of Science and Health Theses and Dissertations
When there is abnormal endocrine signaling in the follicles, infertility, and ovarian diseases such as polycystic ovarian syndrome (PCOS), premature ovarian failure (POF), and different types of ovarian cancers may occur. Retinoic acid (RA), a biologically active derivative of vitamin A, is a critical signaling molecule that plays a vital role in various physiological processes, including embryonic development, tissue differentiation, and reproductive function. RA has been observed to influence granulosa cell proliferation through a cell signaling cascade involving Retinoic Acid Receptors (RARs), which have three isoforms alpha, beta, and gamma. We characterized a new retinoic acid receptor alpha (RARA) conditional …
Investigating The Salinity Tolerance Of The Swordtail (Xiphophorus Hellerii), Alexandra Megan Krak
Investigating The Salinity Tolerance Of The Swordtail (Xiphophorus Hellerii), Alexandra Megan Krak
College of Science and Health Theses and Dissertations
The swordtail, Xiphophorus hellerii, is a freshwater fish species native to Mexico and Central America and is commonly used in the tropical aquarium trade. Swordtails have been shown to have limited survival in 6 ‰ salinity (Nanda et al., 2016), suggesting they may have a greater salinity tolerance than previously expected. Using a gradual acclimation method, we examined the salinity tolerance and swim performance of this species. Freshwater-reared female swordtails were housed in 29-gallon aquaria. A control group was held in freshwater throughout the experiment. For the experimental group, the salinity was increased by 2 ‰ every week until 30 …
Characterization Of The Immune Deficiency Pathway During Female Meiosis In Drosophila Melanogaster, Sarah Mashburn
Characterization Of The Immune Deficiency Pathway During Female Meiosis In Drosophila Melanogaster, Sarah Mashburn
College of Science and Health Theses and Dissertations
Organisms can defend against pathogens by significantly increasing the diversity of their progeny, so that some progeny are more likely to survive infection. This led to the prediction that infection should cause an increase in recombination rates which was seen in a previous study. However, the mechanism that regulates recombination rates in response to infection is not understood and in that study they did not provide a mechanism for how that can occur. In an RNAi screen, our lab found the gene mustard (mtd) is required for normal recombination rates. This gene was previously shown to be part of the …
Observations Of 25 Ghz Methanol Masers In W51a, Peter Wagstaff
Observations Of 25 Ghz Methanol Masers In W51a, Peter Wagstaff
College of Science and Health Theses and Dissertations
High mass stars are important because they alone are responsible for creating the heavy elements in the Universe. The observation of high mass star formation remains a challenging problem in astronomy because high mass stars form in densely clustered environments at large distances from us. Therefore, high angular resolution observations are required to unravel the action taking place in these dense environments. Masers can be used to observe distant regions with high angular resolution because masers are compact and bright sources. Class I methanol masers are believed to form in outflows from protostars where the shock generated by the outflowing …
Using Mesocosms To Model Optimal Levels Of Body Size Variation In Larval Spotted Salamanders (Ambystoma Maculatum), Ian Kratzer
Using Mesocosms To Model Optimal Levels Of Body Size Variation In Larval Spotted Salamanders (Ambystoma Maculatum), Ian Kratzer
Online Theses and Dissertations
Body size is a critical aspect of an organism’s biological identity mediated by various biotic and abiotic factors. Body size historically been approached through “single optima” approaches, but body size variation modifies both inter- and intraspecific interactions and impacts competition-driven fitness outcomes within populations. Understanding optimal levels of body size variation will help illuminate how variation influences competitive outcomes and reproductive fitness. Populations may be structured through resource partitioning or competitive hierarchies, yet these structures predict contradictory size variation optima. This study sought to determine optimal levels of intraspecific body size variation in populations of larval salamanders to evaluate these …
Effects Of Large Wood Additions On Basal Resources, Macroinvertebrates, And Ecosystem Processes In The Narraguagus River, Maine, Val Watson
Electronic Theses and Dissertations
Ecological restoration is an increasingly common practice across ecosystems, and current practices aim to restore the biological and physical processes underlying ecosystem function, often for the sake of endangered higher-level consumers. Studies of restoration outcomes often report few or inconsistent ecological changes, and monitoring of restoration projects rarely measures ecological processes. Monitoring also usually measures outcomes at a single scale, despite the prevalence of scale- dependent phenomena across ecosystems. My thesis uses measurements of ecological processes to assess restoration response and evaluates responses across multiple scales. I focus here on a long-term large wood addition project on the Narraguagus River …
Muscle Defects Lead To Skeletal Deformities In A Zebrafish Model Of Distal Arthrogryposis, Emily A. Tomak
Muscle Defects Lead To Skeletal Deformities In A Zebrafish Model Of Distal Arthrogryposis, Emily A. Tomak
Electronic Theses and Dissertations
Distal Arthrogryposis Type 1 (DA1) involves mild muscle weakness and limb skeletal abnormalities thought to be caused by paralysis in utero. Why the limbs are particularly affected in DA1 and the degree of paralysis that leads to these skeletal deformities in utero remains unclear. Several muscle genes are known to cause DA1, including MYLPF (myosin light chain phosphorylatable), which encodes a myosin light chain protein that binds close to the force-generating head of myosin heavy chains. The zebrafish mylpfa-/- mutant displays a phenotype consistent with DA1, including impaired myosin activity, reduced muscle force overall, and complete fin paralysis. I …
The Relationship Between Intuitive Eating And Body Mass Index And Diet Quality In College Students, Ashley A. Reynolds
The Relationship Between Intuitive Eating And Body Mass Index And Diet Quality In College Students, Ashley A. Reynolds
Electronic Theses and Dissertations
Objective
The objective of this research was to explore the influence of intuitive eating (IE) on body mass index (BMI) and diet quality (DQ) among college students.
Methods
A cross-sectional convenience sample of college students completed an online survey consisting of the short-Healthy Eating Index (SHEI) and the Intuitive Eating Scale-2 (23 items). Body mass index was calculated using self-reported height and weight. Descriptive statistics were used to assess group characteristics. A linear regression was used to test if IE scores significantly predicted BMI. An independent t-test was used to compare BMIs of students with IE scores above and below …
Effect Of Rearing Conditions On The Allocation Of Larval And Adult Acquired Essential And Nonessential Fatty Acids To Flight In Two Adult Lepidoptera: Danaus Plexippus And Mythimna Unipuncta, Libesha Anparasan
Electronic Thesis and Dissertation Repository
Insects which are nectivorous as adults acquire essential fatty acids, which are important for many biological processes, almost exclusively from the larval diet. Thus, adult allocation of this limited resource may result in trade-offs in migrant insects that delay reproduction. I used the true armyworm, Mythimna unipuncta, and monarch butterfly, Danaus plexippus, to test the hypothesis that environmental cues (fall migratory or summer reproductive) would influence the use of fatty acids during flight (0-6h). I used larval and adult diets manipulated isotopically (δ13C) and chromatographic analyses to determine fatty acid composition and source in the fat …
Using Μct Scans To Create 3d Skull Puzzles As Open-Access Pedagogical Tools For Anatomy And Comparative Osteology Classes., Alexis Slack
Using Μct Scans To Create 3d Skull Puzzles As Open-Access Pedagogical Tools For Anatomy And Comparative Osteology Classes., Alexis Slack
Honors Thesis
As access to affordable 3D printing technologies increases, the use of Computed Tomography (CT) technologies is well positioned to contribute to the advancement of pedagogical experiences through the creation of physical models for teaching. Such complementary efforts may enhance broader impacts by simultaneously boosting the education system with a unique hands-on experience for students and providing an alternative to expensive osteological and other artificial models. Two 3D printed skull puzzles were created to aid in teaching human and vertebrate anatomy, and comparative osteology courses. After segmenting all the bones from each respective skull, the individual skeletal elements were 3D printed, …
Exploiting Vulnerabilities In The Ras-Rac Signaling Pathway For The Selective Targeting Of Pancreatic Cancer Cells, Neha Chaudhary
Exploiting Vulnerabilities In The Ras-Rac Signaling Pathway For The Selective Targeting Of Pancreatic Cancer Cells, Neha Chaudhary
Theses & Dissertations
Deregulation of the KRas (Kirsten rat sarcoma virus) GTPase is one of the early hallmarks of Pancreatic Cancer (PC). The most common genetic alteration found in PC are mutations in the KRas protein that block its ability to hydrolyze GTP to GDP and resulting in higher levels of GTP-bound KRas, its active form. Pancreatic tumors driven by oncogenic mutants of KRas tend to be addicted to the oncogene, to the extent that its repression leads to the induction of cell death. This addiction to the KRAS oncogene makes the KRas protein an ideal target for cancer therapy. However, the globular …
Cytokine Profiles In Peruvian Pinnipeds And Their Relationships With Environmental Stressors, Mykenzee L. Munaco
Cytokine Profiles In Peruvian Pinnipeds And Their Relationships With Environmental Stressors, Mykenzee L. Munaco
All HCAS Student Capstones, Theses, and Dissertations
Large colonies of two vulnerable, sympatric pinniped species, Peruvian fur seals (Arctocephalus australis Peruvian subpopulation; PFS) and South American sea lions (Otaria byronia; SASL), reside and reproduce in Punta San Juan, Peru (PSJ) where they are exposed to stressors such as environmental contaminants and El Niño-Southern Oscillation (ENSO) events. Cytokine concentrations can be indicative of an animal’s health and immune function by allowing for immunoresponse characterization as Th1 or Th2 dominant. Utilizing an archived pinniped plasma collection of samples from 2009-2019 (n=148), 13 cytokines were analyzed in PFS and SASL: GM-CSF, IFN-γ, KC-like, MCP-1, TNF-α, IL-2, IL-6, …
The Interaction Between Predation And Sound Pollution On The Internal And External Microbiome Of The Grasshoppers Melanopus Sanguinipes, Alanna Bond
Theses and Dissertations
Anthropogenic activities such as construction and agriculture directly affect its surrounding environments. Many studies have focused on how megafauna and flora are impacted by human activities, however, relatively little is known how new occupation of land affects smaller organisms such as insects and microbes. Additionally, other stressors such as predation can impact host physiology. The grasshopper species Melanopussanguinipes was chosen to be used in a study to measure how stress caused by artificial sound and predation can alter exoskeleton and gut microbiomes once exposed to these stressors.
Investigating The Role Of Plant Traits And Interactions In Emergent Wetland Nutrient Removal, Andrew Ryan Sample
Investigating The Role Of Plant Traits And Interactions In Emergent Wetland Nutrient Removal, Andrew Ryan Sample
Theses and Dissertations
Increasing wetland restoration in the Lower Mississippi Alluvial Valley has been identified as a method to reduce nutrient loading in the Gulf of Mexico. Wetlands have historically been used to treat water through processes facilitated by wetland plants, and relatively few species and plant traits have been identified as important in carrying out these processes. This study focuses on some of those species and traits and aims to identify species differences and plant traits that may be important for wetland nutrient mitigation. Chapter I provides background information on nutrient pollution, wetland biogeochemical mechanisms for nutrient sequestration, and the focal species …
Drivers And Dynamics Of Phytoplankton Communities And Harmful Algal Blooms In Mountain Lakes, Lara Stephanie Jansen
Drivers And Dynamics Of Phytoplankton Communities And Harmful Algal Blooms In Mountain Lakes, Lara Stephanie Jansen
Dissertations and Theses
Harmful cyanobacterial blooms (cyanoHABs) are a complex and widespread disturbance in freshwater water bodies, impacting water quality for wildlife and human populations. While cyanobacteria often bloom in warm lakes impacted by human development like agriculture, blooms are increasingly reported in cooler waters with limited development in the surrounding watershed. As much of cyanoHAB research has focused on lakes in highly developed watersheds, the understanding of factors leading to cyanobacteria dominance and blooms in the absence of major development remains limited. Mountain lakes can serve as ideal systems to study bloom-forming cyanobacteria in watersheds with minimal development. In addition, mountain lakes …
Analyzing Pseudomonas Aeruginosa With Bacteriophage Tags Using Photoacoustic Flow Cytometry, Jennifer C. Schinke
Analyzing Pseudomonas Aeruginosa With Bacteriophage Tags Using Photoacoustic Flow Cytometry, Jennifer C. Schinke
Electronic Theses and Dissertations
The number of daily bacterial infections is climbing and the CDC explains that this is due to the antibiotic-resistant threat in the United States. Finding a faster way of bacterial identification is necessary as it currently takes 1-4 days for a medical lab to culture and identify bacteria. Photoacoustic flow cytometry (PAFC) can be used as an alternative method resulting in swift identification within an hour (Edgar, 2019). Pseudomonas aeruginosa, cell line PA01, will be coated in up to a few hundred red dyed phages making it detectible by the photoacoustic flow cytometry system. Bacteriophages (phages) are viruses that …
Molecular Detection And Characterization Of Rickettsia Sp. In Hard Ticks Collected In Nacogdoches, Texas, Haley Nicole Standifird
Molecular Detection And Characterization Of Rickettsia Sp. In Hard Ticks Collected In Nacogdoches, Texas, Haley Nicole Standifird
Electronic Theses and Dissertations
The number of cases of tick-borne diseases is increasing in the United States. Many efforts to control ticks have been made and are continuously being developed. These methods include surveillance of ticks and detection of the tick-borne pathogens.This study examined hard ticks in Nacogdoches, Texas, to test for the presence of Rickettsia sp. 47 ticks were collected from vegetation by flagging and their species, sex, and developmental stage were determined using available keys. Individual ticks were processed for nucleic acid extraction and molecular detection of Rickettsia sp. using PCR-based methods. The citrate cynthease gene, 17kDa gene, and outer membrane protein …
The Importance Of Contrast Sensitivity, Color Vision, And Electrophysiological Testing In Clinical And Occupational Settings, Frances Silva
The Importance Of Contrast Sensitivity, Color Vision, And Electrophysiological Testing In Clinical And Occupational Settings, Frances Silva
Theses & Dissertations
Visual acuity (VA) is universally accepted as the gold standard metric for ocular vision and function. Contrast sensitivity (CS), color vision, and electrophysiological testing for clinical and occupational settings are warranted despite being deemed ancillary and minimally utilized by clinicians. These assessments provide essential information to subjectively and objectively quantify and obtain optimal functional vision. They are useful for baseline data and monitoring hereditary and progressive ocular conditions and cognitive function. The studies in this dissertation highlight the value of contrast sensitivity, color vision, and cone specific electrophysiological testing, as well as the novel metrics obtained with potential practical clinical …
Exploring Undergraduate Research Experiences And Perceptions Of Responsible And Ethical Conduct Of Research (Recr) Education In The Biological Sciences And (Bio)Chemistry Disciplines, Bernice Justina Caad
Exploring Undergraduate Research Experiences And Perceptions Of Responsible And Ethical Conduct Of Research (Recr) Education In The Biological Sciences And (Bio)Chemistry Disciplines, Bernice Justina Caad
Open Access Theses & Dissertations
Increasing calls to reform undergraduate (UG) education within science, technology, engineering, and mathematics (STEM) disciplines have emphasized the importance of early exposure to responsible and ethical conduct of research (RECR) education. Historically, RECR has primarily been presented at the post-baccalaureate level, leaving many students without a foundational understanding of what responsible research ethics entails during the course of their undergraduate experience. Over the last decade, course-based undergraduate research experiences (CUREs) have emerged as a promising platform to establish expectations of responsible and ethical conduct through greater accessibility and inclusivity, starting at the freshman level. Interestingly, few studies have examined how …
Population Physiology, Demography, And Genetics Of Side-Blotched Lizards (Uta Stansburiana) Residing In Urban And Natural Environments, Spencer B. Hudson
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 …
The Influence Of Climate And Landscape On Allocapnia Mohri Distribution In Arkansas, Brianna Leigh Annaratone
The Influence Of Climate And Landscape On Allocapnia Mohri Distribution In Arkansas, Brianna Leigh Annaratone
Graduate Theses and Dissertations
Stoneflies are a globally threatened aquatic insect order. In Arkansas, a diverse group of winter stonefly (Capniidae: Allocapnia) have not been surveyed since the 1980s, likely because species-level identification requires the rarely-collected adult form. Allocapnia mohri, a regional endemic, was previously commonly found in mountainous, intermittent streams from the Ouachita Mountains ecoregion north to the Ozark Highlands, but no species distributional models including land use or climate variables exist to our knowledge. We collected adults from 70 stream reaches from the historic Arkansas range from November to April 2020 and 2021. We modeled distributions using random forest (RF) models populated …
The Functional Implications Of Anuran Metamorphosis For Survival, Locomotor Performance, And Limb Bone Mechanical Properties, Chase Kinsey
The Functional Implications Of Anuran Metamorphosis For Survival, Locomotor Performance, And Limb Bone Mechanical Properties, Chase Kinsey
All Dissertations
Many organisms must contend with navigating their environments from birth. An organism could be classified as – and is often studied – in the context of locomotion through a single habitat type. However, many organisms must contend with a wide variety of environmental obstacles and substrates. What’s more, a large group of animals, Lissamphibia, do so while undergoing drastic transformation of their morphology and locomotor appendages. This transformation, term metamorphosis, typically coincides with a movement from water as a tadpole, to land as a frog or salamander. Many studies have associated this transitionary period with decreased locomotor performance and worse …
Understanding The Environmental And Genetic Influence On Fluctuating Asymmetry And Developmental Instability In Primates, Ashly N. Romero
Understanding The Environmental And Genetic Influence On Fluctuating Asymmetry And Developmental Instability In Primates, Ashly N. Romero
Graduate Theses and Dissertations
This dissertation explored the impact of environmental factors on the development and perpetuation of fluctuating asymmetry (FA) and sought to understand the role evolution may play in the FA exhibited in two primate populations: the free-ranging Cayo Santiago rhesus macaques (Macaca mulatta) and the Southwest National Primate Research Center olive baboons (Papio hamadryas anubis). Demographic, ontogenetic, secular, external, and genetic factors were examined. Specifically, this dissertation investigated FA over all ontogenetic stages, across decades, between sexes, in association with ecological catastrophes, and with tooth pathology to try and tease apart factors that may influence FA and developmental instability. This dissertation …
Shedding In The Timber Rattlesnake: Natural Patterns, Endocrinological Underpinnings, Temporal And Energetic Effort, And Integration As A Reptilian Life History Trait, Maxwell D. Carnes-Mason
Shedding In The Timber Rattlesnake: Natural Patterns, Endocrinological Underpinnings, Temporal And Energetic Effort, And Integration As A Reptilian Life History Trait, Maxwell D. Carnes-Mason
Graduate Theses and Dissertations
The semi-frequent replacement of the epidermis (ecdysis) is a characteristic trait of reptiles. Whereas all reptiles regularly engage in some degree of skin shedding, skin morphology in snakes necessitates the synchronous replacement of the entire epidermis and facilitates the subsequent removal of the old layer as a single sheet. To date, the ubiquitous process has garnered little attention from researchers because snakes shed with unpredictable timing and frequency and are exceedingly cryptic during ecdytic cycles; previously impeding detailed physiological or ecological investigations of the process in the clade. Because of the lack of study, ecdysis is often viewed as a …
Consistency Is Key: Investigating Vocal Consistency In Field Sparrows, Stephanie Stanton
Consistency Is Key: Investigating Vocal Consistency In Field Sparrows, Stephanie Stanton
Masters Theses
No abstract provided.