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The Invasive Bank Vole (Myodes Glareolus): A Model System For Studying Parasites And Ecoimmunology During A Biological Invasion, Andrew Mcmanus, Celia V. Holland, Heikki Henttonen, Peter Stuart Aug 2021

The Invasive Bank Vole (Myodes Glareolus): A Model System For Studying Parasites And Ecoimmunology During A Biological Invasion, Andrew Mcmanus, Celia V. Holland, Heikki Henttonen, Peter Stuart

Publications

Animals, vol. 11, no. 9. © 2021 by the authors.

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Investigation Into The Evolution Of Heterogeneity Within Secondary Replicons And Their Maintenance In Genus Variovorax, Christopher Ne Ville Aug 2021

Investigation Into The Evolution Of Heterogeneity Within Secondary Replicons And Their Maintenance In Genus Variovorax, Christopher Ne Ville

Electronic Theses, Projects, and Dissertations

Approximately 10% of all bacterial genomes sequenced thus far contain a secondary replicon. This considerable genetic reservoir contains many potentially mobilizable elements, allowing for the formation of many unique secondary replicons. This property of bacterial populations vastly increases the genomic diversity available to species that effectively take up and maintain these replicons. Members of the genus Variovorax have extensive heterogeneity in genome architecture, including sequenced isolates containing plasmids, megaplasmids, and chromids. Using available Illumina data on the NCBI database, we have completed these assemblies using 3rd generation sequencing methods on 17 members of this genus. We have sequenced, assembled, …

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Unveiling Global Roles Of G-Quadruplexes And G4-22 In Human Genetics, Ruth Barros De Paula Aug 2021

Unveiling Global Roles Of G-Quadruplexes And G4-22 In Human Genetics, Ruth Barros De Paula

Dissertations and Theses (Open Access)

G-quadruplexes are non-B DNA structures formed by four or more runs of repeated guanines that confer unique features to living organism’s genomes. These sequences are enriched in regulatory regions, such as promoters and 5’ UTRs, and have distinct regulatory roles in both health and disease states. Even though previous studies showed the impact of G4 in gene expression, none of them summarized the location-specific effect of G4. Also, there is no broad understanding about the most common G4 repeat in the human genome, named here as G4-22, and how it links to the evolution of mammals and their biology. In …

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A Stable-Isotope Probing Approach To Modeling Bidirectional Nutrient Exchange In The Microcystis Phycosphere, Malia Gardner Aug 2021

A Stable-Isotope Probing Approach To Modeling Bidirectional Nutrient Exchange In The Microcystis Phycosphere, Malia Gardner

Masters Theses, 2020-current

Cyanobacterial harmful algal blooms (cHABs) plague freshwater systems worldwide and are projected to increase in intensity in the coming decades. cHABs damage aquatic ecosystems by blocking light penetration into the water column, creating hypoxic conditions, and releasing toxins. One of the most prolific cHAB formers is the cosmopolitan genus of cyanobacteria Microcystis. Global climate change and anthropogenic loading of nutrients such as nitrogen (N) and phosphorus (P) fuel Microcystis bloom formation. Increasing global temperatures favor Microcystis because of its high optimal growth temperature. N input is of particular importance for Microcystis because it is unable to fix atmospheric N, …

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Soil Chemistry Modification By Guinea Grass In Semi-Arid Soils: A Litter Mediated Positive Feedback, Vanessa Elizabeth Thomas Aug 2021

Soil Chemistry Modification By Guinea Grass In Semi-Arid Soils: A Litter Mediated Positive Feedback, Vanessa Elizabeth Thomas

Theses and Dissertations

Nutrients are a key component of healthy soils. Their composition plays an important role in plant growth through nutrient cycling and directly influences the functioning of plant communities in both agricultural and natural ecosystems. Shifts in macronutrients such as phosphorus and nitrogen may be initiated by invasive growth as a driver for competition with native plants. The goal of this study is to explore the plant soil feedback in an exotic invasive plant, Guinea grass (Pancium maximum), an invasive bunch grass originally from Africa, across different habitat types in the Lower Rio Grande Valley (LRGV). To determine a positive plant …

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Articulating The Importance Of Broader Relevance In Cures: From Definition To Actualization, Nikki T. Donegan Aug 2021

Articulating The Importance Of Broader Relevance In Cures: From Definition To Actualization, Nikki T. Donegan

Open Access Theses & Dissertations

Course-based undergraduate research experiences (CUREs) have emerged as a means to foster student' scientific reasoning, promote positive attitudes and motivations toward research, and increase persistence in the science, technology, engineering, and mathematics (STEM) fields. In contrast to prescriptive laboratories, students enrolled in CUREs employ techniques and skills to collaboratively and iteratively address novel questions of broad relevance to audiences beyond the scope of the course itself. While many of the core components of CUREs are perceived to be relatively straightforward, definitionally-speaking, this latter dimension of broader relevance has, in contrast, remained largely ill-defined. In the series of studies presented herein, …

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The Periaqueductal Grey In Opioid Tolerance And Chronic Pain, Akila Ram Aug 2021

The Periaqueductal Grey In Opioid Tolerance And Chronic Pain, Akila Ram

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pain is the body’s natural warning system to indicate one is in an environment highly detrimental to survival. The body’s response to the sensation of pain is to immediately withdraw from this environment, ensuring continued survival. However, when pain lasts beyond the window in which it is useful, it no longer serves as a helpful warning system but instead degrades the quality of life. Chronic pain leads to patients seeking opioids to alleviate their condition and regain control of their lives. A severe negative side effect of the use of opioids to treat chronic pain is the development of tolerance …

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Ecophysiology Of Toxic Bloom-Forming Cyanobacteria And Their Symbionts, Dominique J. Lockwood Aug 2021

Ecophysiology Of Toxic Bloom-Forming Cyanobacteria And Their Symbionts, Dominique J. Lockwood

Masters Theses, 2020-current

Currently, there is a pernicious microbe in the genus Microcystis that is putting the world’s freshwater resources at risk. A member of the phylum Cyanobacteria, otherwise referred to as blue-green algae, Microcystis forms massive algal blooms in lakes and has the potential to produce a toxin, which does not only harm humans, but also pets, livestock, and aquatic life. As recently as 2016, in the city of Toledo, Ohio, nearly 1 million residents went without clean drinking water for an entire weekend due to one of these Microcystis blooms. However, Microcystis does not only bloom in Ohio. In fact, …

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The Influence Of Incubation Conditions On Oxygen Consumption During The Development Of Pantherophis Guttatus, Celeste Gallardo Aug 2021

The Influence Of Incubation Conditions On Oxygen Consumption During The Development Of Pantherophis Guttatus, Celeste Gallardo

Electronic Theses and Dissertations

The flexible shell of some oviparous reptiles has led to differences in nutrient mobilization and water relations when compared to their rigid-shelled counterparts. Flexible-shelled eggs gain more water during development, and because of the shell structure, yolk calcium content is higher than that of eggshells. When water availability is altered for reptiles with flexible-shelled eggs, differences in both energy and nutrient utilization are observed. This study was designed to determine the baseline metabolic rate during development for the snake, Pantherophis guttatus under normal conditions, and to observe how changes in eggshell calcium and water availability impact embryonic oxygen consumption. Eggshell …

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Sexual Conflicts In Sand Tiger Sharks Carcharias Taurus (Rafinesque, 1810) In An Artificial Environment, Elizabeth Claus, Alan Henningsen, Mahmood Shivji, Bradley Wetherbee Jul 2021

Sexual Conflicts In Sand Tiger Sharks Carcharias Taurus (Rafinesque, 1810) In An Artificial Environment, Elizabeth Claus, Alan Henningsen, Mahmood Shivji, Bradley Wetherbee

Biology Faculty Articles

Understanding reproductive behaviours and the environmental conditions that facilitate reproduction is important for successful reproduction in managed care. Complex reproductive behaviours have been observed in both aquarium and free-ranging elasmobranchs. Sexual conflicts, including pre-copulatory behaviours in sand tiger sharks Carcharias taurus in managed care have been previously documented. This study reports observations that corroborate the previous accounts of reproductive behaviours as well as describing novel consexual conflicts between males and detailing the male dominance hierarchy in six sand tigers at the National Aquarium. The observations suggest that male behaviours are not strictly pre-copulatory, as consexual male conflicts occurred to the …

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The Mitochondrial Genome Of The Spiny-Wristed Fiddler Crab, Leptuca Spinicarpa Rathbun 1900, Amber Finke, James Demastes Ph.D., J. Antonio Baeza, Carl Thurman Ph.D. Jul 2021

The Mitochondrial Genome Of The Spiny-Wristed Fiddler Crab, Leptuca Spinicarpa Rathbun 1900, Amber Finke, James Demastes Ph.D., J. Antonio Baeza, Carl Thurman Ph.D.

Summer Undergraduate Research Program (SURP) Symposium

No abstract provided.

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Characterizing Biology Education Research: Perspectives From Practitioners And Scholars In The Field, Jeremy L. Hsu, Audrey Chen, Eduardo Cruz-Hinojoza, Duyen Dinh-Dang, Elizabeth A. Roth-Johnson, Brian K. Sato, Stanley M. Lo Jul 2021

Characterizing Biology Education Research: Perspectives From Practitioners And Scholars In The Field, Jeremy L. Hsu, Audrey Chen, Eduardo Cruz-Hinojoza, Duyen Dinh-Dang, Elizabeth A. Roth-Johnson, Brian K. Sato, Stanley M. Lo

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Biology education research (BER) is a recently emerging field mainly focused on the learning and teaching of biology in postsecondary education. As BER continues to grow, exploring what goals, questions, and scholarship the field encompasses will provide an opportunity for the community to reflect on what new lines of inquiry could be pursued in the future. There have been top-down approaches at characterizing BER, such as aims and scope provided by professional societies or peer-reviewed journals, and literature analyses with evidence for current and historical research trends. However, there have not been previous attempts with a bottom-up approach at characterizing …

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Development Of An Online General Biology Open Educational Resource (Oer) Laboratory Manual, Dmitry Y. Brogun, Azure N. Faucette, Kristin Polizzotto, Farshad Tamari Jul 2021

Development Of An Online General Biology Open Educational Resource (Oer) Laboratory Manual, Dmitry Y. Brogun, Azure N. Faucette, Kristin Polizzotto, Farshad Tamari

Publications and Research

Currently, many academic institutions are using one or more variations of online modalities due to the COVID-19 pandemic, and science educators face a unique challenge with distance-learning laboratories. Many resources to engage students in virtual, interactive laboratory activities exist, but we found that high costs and/or overlooked content left gaps for several topics typically taught in a general, introductory biology course for undergraduate biology majors (e.g., organismal biology). Additionally, resources for an online lab must be identified and curated from multiple sources, requiring intense demands on the instructors’ time. To meet this need and to overcome the financial burden of …

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Set1 Targets Genes With Essential Identity And Tumor-Suppressing Functions In Planarian Stem Cells, Prince Verma, Courtney K. M. Waterbury, Elizabeth M. Duncan Jul 2021

Set1 Targets Genes With Essential Identity And Tumor-Suppressing Functions In Planarian Stem Cells, Prince Verma, Courtney K. M. Waterbury, Elizabeth M. Duncan

Biology Faculty Publications

Tumor suppressor genes (TSGs) are essential for normal cellular function in multicellular organisms, but many TSGs and tumor-suppressing mechanisms remain unknown. Planarian flatworms exhibit particularly robust tumor suppression, yet the specific mechanisms underlying this trait remain unclear. Here, we analyze histone H3 lysine 4 trimethylation (H3K4me3) signal across the planarian genome to determine if the broad H3K4me3 chromatin signature that marks essential cell identity genes and TSGs in mammalian cells is conserved in this valuable model of in vivo stem cell function. We find that this signature is indeed conserved on the planarian genome and that the lysine methyltransferase Set1 …

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Neurotranscriptomic Changes Associated With Chick-Directed Parental Care In Adult Non-Reproductive Japanese Quail, Patricia C. Lopes, Robert De Brujin Jul 2021

Neurotranscriptomic Changes Associated With Chick-Directed Parental Care In Adult Non-Reproductive Japanese Quail, Patricia C. Lopes, Robert De Brujin

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

For many species, parental care critically affects offspring survival. But what drives animals to display parental behaviours towards young? In mammals, pregnancy-induced physiological transformations seem key in preparing the neural circuits that lead towards attraction (and reduced-aggression) to young. Beyond mammalian maternal behaviour, knowledge of the neural mechanisms that underlie young-directed parental care is severely lacking. We took advantage of a domesticated bird species, the Japanese quail, for which parental behaviour towards chicks can be induced in virgin non-reproductive adults through a sensitization procedure, a process that is not effective in all animals. We used the variation in parental responses …

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Quantifying Resource Use Among Insectivorous Bat Species With Overlapping Distributions, Shannon Whitney Jul 2021

Quantifying Resource Use Among Insectivorous Bat Species With Overlapping Distributions, Shannon Whitney

Master of Science in Integrative Biology Theses

Bats make up 20% of all mammalian species, are globally distributed, and are the only mammals capable of sustained flight. Bats have adapted to feed on insects, scorpions, aquatic arthropods, mammals, birds, reptiles, amphibians, fish, blood, carrion, fruit, flowers, nectar, pollen, and even seeds and foliage. However, the feeding ecology of these organisms is not well understood. Most bat species in North America rely on the same method of foraging and locomotion. The geographical range and habitats of these bats also commonly overlap. Bat feeding ecology studies have used fecal analysis to identify consumed prey species. Factors such as time …

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Mitochondrial Genome Of Geomydoecus Aurei, A Pocket-Gopher Louse, Theresa A. Spradling, Alexandra C. Place, Ashley L. Campbell, James W. Demastes Jul 2021

Mitochondrial Genome Of Geomydoecus Aurei, A Pocket-Gopher Louse, Theresa A. Spradling, Alexandra C. Place, Ashley L. Campbell, James W. Demastes

Faculty Publications

Parasitic lice demonstrate an unusual array of mitochondrial genome architectures and gene arrangements. We characterized the mitochondrial genome of Geomydoecus aurei, a chewing louse (Phthiraptera: Trichodectidae) found on pocket gophers (Rodentia: Geomyidae) using reads from both Illumina and Oxford Nanopore sequencing coupled with PCR, cloning, and Sanger sequencing to verify structure and arrangement for each chromosome. The genome consisted of 12 circular mitochondrial chromosomes ranging in size from 1,318 to 2,088 nucleotides (nt). Total genome size was 19,015 nt. All 37 genes typical of metazoans (2 rRNA genes, 22 tRNA genes, and 13 protein-coding genes) were present. An average …

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Zebrafish Blunt-Force Tbi Induces Heterogenous Injury Pathologies That Mimic Human Tbi And Responds With Sonic Hedgehog-Dependent Cell Proliferation Across The Neuroaxis, James Hentig, Kaylee Cloghessy, Manuela Lahne, Yoo Jin Jung, Rebecca A. Petersen, Ann C. Morris, David R. Hyde Jul 2021

Zebrafish Blunt-Force Tbi Induces Heterogenous Injury Pathologies That Mimic Human Tbi And Responds With Sonic Hedgehog-Dependent Cell Proliferation Across The Neuroaxis, James Hentig, Kaylee Cloghessy, Manuela Lahne, Yoo Jin Jung, Rebecca A. Petersen, Ann C. Morris, David R. Hyde

Biology Faculty Publications

Blunt-force traumatic brain injury (TBI) affects an increasing number of people worldwide as the range of injury severity and heterogeneity of injury pathologies have been recognized. Most current damage models utilize non-regenerative organisms, less common TBI mechanisms (penetrating, chemical, blast), and are limited in scalability of injury severity. We describe a scalable blunt-force TBI model that exhibits a wide range of human clinical pathologies and allows for the study of both injury pathology/progression and mechanisms of regenerative recovery. We modified the Marmarou weight drop model for adult zebrafish, which delivers a scalable injury spanning mild, moderate, and severe phenotypes. Following …

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Analysis Of The Role Of Akirin Interactions With Nuclear Body Proteins During Myogenesis, Laura Yorke Jul 2021

Analysis Of The Role Of Akirin Interactions With Nuclear Body Proteins During Myogenesis, Laura Yorke

Master of Science in Integrative Biology Theses

Akirin is a highly conserved, small nuclear protein of indeterminate structure ubiquitously expressed in non-fungal eukaryotic species. It was first discovered in the innate immune response, but many other functions have since been found, including embryonic muscle patterning and myogenesis. Animals with either nonfunctional or missing Akirin have aberrations in embryonic muscle patterning, along with other defects. Akirin interacts with transcription factors such as Twist to coordinate development through interfacing between Twist and other complexes, such as the Brahma Chromatin Remodeling Complex (BRM). Therefore, Akirin likely plays a general role in transcription during early development, interfacing with other transcriptional machinery …

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Characteristics Of Non-Fatal Attacks By Black Bears: Conterminous United States, 2000–2017, Janel M. Scharhag, Cady Sartini, Shawn M. Crimmins, Scott E. Hygnstrom, Jeffrey B. Stetz Jul 2021

Characteristics Of Non-Fatal Attacks By Black Bears: Conterminous United States, 2000–2017, Janel M. Scharhag, Cady Sartini, Shawn M. Crimmins, Scott E. Hygnstrom, Jeffrey B. Stetz

Human–Wildlife Interactions

Attacks on humans by bears (Ursus spp.) have increased in recent decades, as both human and bear populations have increased. To help mitigate the risk of future attacks, it is important to understand the circumstances in past attacks. Information and analyses exist regarding fatal attacks by both American black bears (Ursus americanus) and brown bears (U. arctos) as well as non-fatal attacks by brown bears. No similarly thorough analyses on non-fatal attacks by black bears are available. Our study addressed this information gap by analyzing all (n = 210) agency-confirmed, non-fatal attacks by black …

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Investigating Local Adaptation To Hypoxia Stress In The Eastern Oyster Through Comparative Transcriptomics, Heather Nichole Smith Jul 2021

Investigating Local Adaptation To Hypoxia Stress In The Eastern Oyster Through Comparative Transcriptomics, Heather Nichole Smith

LSU Master's Theses

Climate change represents one of the most important challenges to biodiversity, therefore it is important to understand the mechanisms that allow species to respond to rapid environmental change. Here, we compared two populations of eastern oysters, Crassostrea virginica, from the Gulf of Mexico to study the mechanisms underlying hypoxia tolerance. Using a common garden experiment and comparative transcriptomics, we identified sets of genes involved in the hypoxia response and found differences in both the timing and baseline expression of hypoxia-responsive genes between tolerant and sensitive populations, consistent with a scenario of local adaptation. These genes include the signaling transcription factor …

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The Anti-Dipsogenic And Anti-Natriorexigenic Effects Of Estradiol, But Not The Anti-Pressor Effect, Are Lost In Aged Female Rats, Jessica Santollo, Jason A. Collett, Andrea A. Edwards Jul 2021

The Anti-Dipsogenic And Anti-Natriorexigenic Effects Of Estradiol, But Not The Anti-Pressor Effect, Are Lost In Aged Female Rats, Jessica Santollo, Jason A. Collett, Andrea A. Edwards

Biology Faculty Publications

Estradiol (E2) inhibits fluid intake in several species, which may help to defend fluid homeostasis by preventing excessive extracellular fluid volume. Although this phenomenon is well established using the rat model, it has only been studied directly in young adults. Because aging influences the neuronal sensitivity to E2 and the fluid intake effects of E2 are mediated in the brain, we tested the hypothesis that aging influences the fluid intake effects of E2 in female rats. To do so, we examined water and NaCl intake in addition to the pressor effect after central angiotensin II treatment in young (3-4 months), …

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Optimization Of Mechanical Properties At The Infarct Border Zone, Kaushik Sunder Jul 2021

Optimization Of Mechanical Properties At The Infarct Border Zone, Kaushik Sunder

LSU Master's Theses

A myocardial infarction (MI) occurs every 39 seconds in the United States. As of 2016, an estimated 550,000 new and 200,000 recurrent episodes of myocardial infarction (MI) occur each year in the United States was. Infarction is often distinguished by a considerable decrease in wall thickness and an increase in heart size or left ventricular volume. This behavior happens when there is a prolonged lack of blood flow, usually due to damage or clotting, which causes cardiomyocytes to die (CMs). The development of non-contractile infarct scarring is the primary pathophysiology of MI. While the infarct scar prevents myocardial rupture during …

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Late Embryogenesis Abundant Proteins And Mitochondrial Membranes From An Animal Extremophile: Insights Into Severe Water Stress, John Marcus Anderson Jul 2021

Late Embryogenesis Abundant Proteins And Mitochondrial Membranes From An Animal Extremophile: Insights Into Severe Water Stress, John Marcus Anderson

LSU Doctoral Dissertations

This dissertation focuses on two major topics germane to mechanisms by which animals tolerate extreme water stress. First, the impact of transgenic expression of late embryogenesis abundant proteins (LEA) on water stress tolerance of the fruit fly Drosophila melanogaster was investigated. The overall aim was to extend current understanding of the protective properties of LEA proteins documented with isolated cells to a desiccation-sensitive organism during exposure to drying and hyperosmotic stress. Four lines of D. melanogaster were created that expressed transgenes encoding selected LEA proteins originally identified in embryos of the extremophile Artemia franciscana. After 80% tissue water loss, …

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The Role Of Toxoplasma Gondii Dense Granule Protein Gra24 In Signaling And Immunity During Infection, Heather L. Mercer Jul 2021

The Role Of Toxoplasma Gondii Dense Granule Protein Gra24 In Signaling And Immunity During Infection, Heather L. Mercer

Biology ETDs

Toxoplasma gondii is a pathogen whose control partly depends upon Toll-like receptors (TLR) 11 and 12, that signal through MyD88. Yet, human TLR11 and TLR12 are nonfunctional, motivating us to investigate MyD88-independent immune pathways. Parasite dense granule protein GRA24 activates p38 MAPK independently of MyD88 in macrophages. Using wild-type and GRA24-deleted T. gondii strains, I demonstrate GRA24 activates p38 MAPK, resulting in IL-12 production, and protective immunity. Furthermore, GRA24 triggers p38 MAPK-dependent CX3CL1 production. GRA24 also induces CCL17 and Ppbp independently of p38 MAPK. Additionally, I demonstrate GRA24 downregulates CCL12. Furthermore, IL-15 is negatively regulated by GRA24 through activation …

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Enhancing Existing Isolated Underpasses With Fencing Reduces Wildlife Crashes And Connects Habitat, Bridget M. Donaldson, Kaitlyn E. M. Elliott Jul 2021

Enhancing Existing Isolated Underpasses With Fencing Reduces Wildlife Crashes And Connects Habitat, Bridget M. Donaldson, Kaitlyn E. M. Elliott

Human–Wildlife Interactions

The impact of wildlife–vehicle collisions on drivers and wildlife populations has been gaining attention in the United States. Given the established success of wildlife crossings with fencing in reducing wildlife crashes and connecting habitat, information is needed on cost-effective means of implementation for departments of transportation. When wildlife crossings are constructed, they are often built into new road projects as a series of 2 or more underpasses and/or overpass structures connected by exclusionary fencing. Given limited transportation budgets and the prevalence of maintenance activities more so than new construction in many states, enhancing existing underpasses on previously constructed roads has …

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Zygomorphic Flowers May Reduce Extinction Rates By Allowing Angiosperms To Occur In Low Abundances, Maria Belen Alvestegui Jul 2021

Zygomorphic Flowers May Reduce Extinction Rates By Allowing Angiosperms To Occur In Low Abundances, Maria Belen Alvestegui

Theses

The high species richness that angiosperm show has been extensively correlated with key floral innovations. Key floral traits contribute to species boundaries and the origin of new species. However, how these relate to extinction remains largely untested. Among the multiple theories that attribute diversification to floral innovations, the reduced extinction model predicts that floral specialization allows the persistence of small populations and avoids their loss. Bilateral symmetry (zygomorphy) is a trait that has evolved recurrently in angiosperms. It is a form of floral specialization that restricts pollination to fewer visitors and precisely places pollen to ensure more effective transmission of …

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Temperature-Induced Activation Of The Reproductive Axis Through Melatonin-Mediated Changes In Thyrotropin, Treven J. Winters Jul 2021

Temperature-Induced Activation Of The Reproductive Axis Through Melatonin-Mediated Changes In Thyrotropin, Treven J. Winters

Dissertations and Theses

An animal's ability to synchronize life-history events or stages with optimal environmental conditions is paramount to successfully reproducing and maximizing fitness. Additional events including migration, foraging, rearing of young, and emergence from hibernation are all examples of processes under environmental control in one species or another. An exciting new mechanism involving neural thyroid hormone metabolism has been elucidated that links environmental control to the neuroendocrine reproductive axis. In birds and mammals with seasonal breeding cycles, this neuroendocrine pathway is activated by photoperiod-induced changes in thyroid stimulating hormone (TSH, also known as thyrotropin) production within the pars tuberalis region of the …

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Effects Of Salinity On Eastern Oysters: Locating Lower-Salinity Tolerant Populations And Defining Resource Zones Suitable To Restoration, Fisheries, And Aquaculture., Lauren Swam Jul 2021

Effects Of Salinity On Eastern Oysters: Locating Lower-Salinity Tolerant Populations And Defining Resource Zones Suitable To Restoration, Fisheries, And Aquaculture., Lauren Swam

LSU Master's Theses

Eastern oysters (Crassostrea virginica) provide valuable ecosystem services and support a productive commercial industry in the northern Gulf of Mexico. Declining abundance from water quality changes and other factors drives development of management and restoration strategies focused on a comprehensive, metapopulation approach. Identifying oyster resource zones based on water quality combined with selective breeding of oysters adapted to specific conditions provides strategies to support aquaculture development and ensure resilient oyster populations and high production. Using 2015-2019 satellite-derived continuous salinity and temperature data for coastal Louisiana, this work created maps defining oyster resource zones supportive of (1) broodstock sanctuary …

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The Mayfly Newsletter, Donna Giberson Jul 2021

The Mayfly Newsletter, Donna Giberson

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

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