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Articles 301 - 312 of 312
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Looking Into The Past: The Diversification Of Amphibians In The Neotropical Savannas, Ísis Da Costa Arantes
Looking Into The Past: The Diversification Of Amphibians In The Neotropical Savannas, Ísis Da Costa Arantes
Electronic Theses and Dissertations
Aim: Reveal the evolutionary processes that contributed to biotic diversification in the Cerrado savanna using amphibians as a model. Evolutionary patterns were investigated by comparing the phylogeographic and biogeographic history of biome-specific yet widely distributed amphibian species (Chiasmocleis albopunctata, Dendropsophus rubicundulus and Physalaemus nattereri). Location: Cerrado region, central South America. Methods: I sampled thousands of loci randomly distributed throughout the genomes of all three species. I applied phylogenetic, phylogeographic, demographic, and coalescent species delimitation methods to these molecular data, in combination with species distribution modeling for the past, in order to resolve questions of evolutionary history, taxonomic diversity, …
Jumping To Conclusions: The Effects Of Hydration Status On Kinetics And Electromyography In The Vertical Jump, Paul Tyler Donahue
Jumping To Conclusions: The Effects Of Hydration Status On Kinetics And Electromyography In The Vertical Jump, Paul Tyler Donahue
Electronic Theses and Dissertations
Results: Significant differences were present between hypo- and euhydrated conditions for peak and mean force during the CMJ with no difference in jump height. Significant differences were present between conditions for jump height and jump velocity for the SJ. No differences were seen in any of the four muscles of interest in regard to muscle activation. Significant differences were present between jump height of the CMJ and SJ respectively, with high correlation coefficients to jump velocity in both jump techniques.
Acute Exercise And Creativity: Embodied Cognition Approaches, Emily M. Frith
Acute Exercise And Creativity: Embodied Cognition Approaches, Emily M. Frith
Electronic Theses and Dissertations
This dissertation manuscript is the culmination of three years of research examining several unique, exercise-induced mechanisms underlying creativity. This collection of work addresses historical and current empirical concepts of creativity in a narrative review, providing recommendations for future research. Several reviews follow this introduction, highlighting the proposed effects of exercise on creativity, putative mechanisms for creativity, and the effects of exercise and embodied manipulations on creative behavior. Multiple experiments utilizing moderate-intensity exercise as a theoretical stimulus for higher-order cognitions were conducted to investigate associations between exercise and creativity, which lead to the final dissertation experiment. The dissertation experiment was the …
Food Insecurity And Health Of International Students, Jamie Nichole Benefield
Food Insecurity And Health Of International Students, Jamie Nichole Benefield
Electronic Theses and Dissertations
International college students may be at risk for suffering from food insecurity and poor health. The purposes of this study were to: 1) determine if the household adult food security status (HAFSS) differs between undergraduate and graduate international students (INSTUD) attending the University of Mississippi (UM); 2) establish if a statistically significant relationship exists between health (physical functioning (PF) , role limitations due to physical health (RLPH), role limitations due to emotional problems (RLEP), energy/fatigue (EF), emotional well-being (EWB), social functioning (SF), pain (P), and general health (GH) and HAFSS; 3) assess if health differs between INSTUD living in food …
Inferring Food Web Structure To Identify Seasonal And Longitudinal Patterns In Ogeechee River Invertebrate Communities, Julien Marc Buchbinder
Inferring Food Web Structure To Identify Seasonal And Longitudinal Patterns In Ogeechee River Invertebrate Communities, Julien Marc Buchbinder
Electronic Theses and Dissertations
Understanding how the structure and function of aquatic communities vary across space and time is essential for proper management of freshwater ecosystems. Current management relies on rapid biomonitoring using metrics of community structure, but metrics that incorporate ecosystem processes and functions are only just beginning to see use in assessment and management. Food webs inferred from known species interactions have been proposed as a method of incorporating function into bioassessment without expending extra effort or sacrificing the cost-effectiveness of current monitoring schemes. To apply food webs in biomonitoring, it is first necessary to understand how communities and food webs vary …
Ankle-Knee Initial Contact Angle And Latency Period To Maximum Angle Are Affected By Prolonged Run, Sydni Wilhoite Ms
Ankle-Knee Initial Contact Angle And Latency Period To Maximum Angle Are Affected By Prolonged Run, Sydni Wilhoite Ms
Electronic Theses and Dissertations
INTRODUCTION: The angle experienced at initial contact and midstance have been suggested to influence the risk of injury. Previous literature has not assessed these angles under the influence of novel footwear for a non-exhaustive prolonged run or the relationship between the angles. PURPOSE: The purpose of this study was to assess the change of lower extremity kinematic parameters and the relationship between kinematic parameters at initial contact and midstance with prolonged running under the influence of different types of footwear. METHODS: The participants included 12 experienced, recreational runners (6 male; 6 female; 24.8 ± 8.4 years; 70.5 ± 9.3 kg; …
Quantifying The Morphological And Physiological Effects Of Drought, Grass Invasion, And Fire On Longleaf, Loblolly, And Slash Pine, Laura Young
Electronic Theses and Dissertations
Climate change is altering ecosystems on a global scale, creating novel ecological scenarios with which plant species must cope. Factors such as altered precipitation and fire regimes and non-native plant invasion may negatively affect native plant species, while interactions between these stressors could magnify their impacts. The complexity of multiple stressors and the effects they have on native pine seedlings are difficult to predict without evaluating their combinations in field experiments. In a multi-year study, I investigated the effects of drought and plant invasion on three southeastern pine species under pre and post-fire conditions. We planted longleaf (Pinus palustris …
Player-Coach Perceptions Of Internal Load, Exertion, And Recovery In Collegiate Male Soccer Players, Michelle L. Eisenman
Player-Coach Perceptions Of Internal Load, Exertion, And Recovery In Collegiate Male Soccer Players, Michelle L. Eisenman
Electronic Theses and Dissertations
Periodization of athlete training load to improve performance and maximize recovery, while reducing injuries and overtraining, is essential in team sports. Understanding internal load responses and monitoring athlete exertion and recovery can help coaches during a competitive season. Recovery Status (PRS) and Rating of Perceived Exertion (RPE) are two subjective scales used to help quantify training load and recovery. These scales are more useful if there is an agreement between coaches (C) and players (P) assessment of intensity and recovery. PURPOSE: To assess subjective measures (PRS and RPE scores) from P and C during a 13-week competitive soccer season. Furthermore, …
Behavioral And Molecular Analysis Of Memory In The Dwarf Cuttlefish, Jessica M. Bowers
Behavioral And Molecular Analysis Of Memory In The Dwarf Cuttlefish, Jessica M. Bowers
Electronic Theses and Dissertations
Complex memory has evolved because it benefits animals in all areas of life, such as remembering the location of food or conspecifics, and learning to avoid dangerous stimuli. Advances made by studying relatively simple nervous systems, such as those in gastropod mollusks, can now be used to study mechanisms of memory in more complex systems. Cephalopods offer a unique opportunity to study the mechanisms of memory in a complex invertebrates. The dwarf cuttlefish, Sepia bandensis, is a useful memory model because its fast development and small size allows it to be reared and tested in large numbers. However, primary literature …
Quantification Of Aqp11 Paralog Expression In The Osmoregulatory Organs Of Anguilla Rostrata, Keith C. Kurt
Quantification Of Aqp11 Paralog Expression In The Osmoregulatory Organs Of Anguilla Rostrata, Keith C. Kurt
Electronic Theses and Dissertations
Osmoregulation is facilitated by using an assortment of ion and water channels to assist acclimation to changing conditions and to maintain cellular homeostasis. Euryhaline fish can be found in both seawater and freshwater (SW and FW) environments. Expression of ion and water channels have been experimentally demonstrated to change as a fish acclimates to different environmental conditions. Relatively recently, a new group of water channels has been discovered that are primarily intracellular and includes aquaporin 11 (AQP11). Typically, AQPs are located on the cell plasma membrane to allow water to flow in and out of the cell by osmosis to …
Negative Effects Of Common Herbicides On Non-Target Invertebrates, Debbi Albanese
Negative Effects Of Common Herbicides On Non-Target Invertebrates, Debbi Albanese
Electronic Theses and Dissertations
Three herbicide formulations, Roundup® Ready to Use Weed and Grass Killer, Bayer Advanced Southern Weed Killer for Lawns and Pure 20% Vinegar Solution were directly applied to eggs of four species of butterflies, Danaus plexippus, Papilio cresphontes, Papilio polyxenes and Papilio troilus. Roundup and Bayer Advanced containing 2,4-D, mecoprop-p and dicamba significantly reduced hatch success in all four species. Lethal and sublethal effects of these herbicides on the earthworm, Eisenia andrei, was also examined. Direct contact by E. andrei with a heavy dose of the herbicides applied to tops of soil 24 hours prior was lethal to earthworms. …
Bird Window Strikes On A College Campus: Mortality Estimates And Possible Mitigation, Antarius D. Mclain
Bird Window Strikes On A College Campus: Mortality Estimates And Possible Mitigation, Antarius D. Mclain
Electronic Theses and Dissertations
Understanding the impact that human development has on wildlife populations is essential to preserving biodiversity. Bird populations are a good indicator of anthropogenic threats because they are sensitive to environmental change. Window strikes are a major source of mortality for bird populations. Studies have begun to monitor factors that cause window strikes and estimate the amount of birds killed annually by strikes. However, these estimates can be greatly affected by site dependent variables and scavenging of carcasses. My study addresses this issue by answering four questions: First, how many birds are killed annually on campus? Second, what factors complicate making …