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Articles 1 - 30 of 356

Full-Text Articles in Biology

Microplastics, Macro-Problems: Abundance Of Man-Made Materials In The Waters And Sediments Of Florida State Parks, Luciana M. Banquero, Kate Mclendon, Andres Alatorre, Mackenzie Daniels, Savanna Freeman, Cassidy Starke, Katherine Harris, Sidney J. Busch Dec 2023

Microplastics, Macro-Problems: Abundance Of Man-Made Materials In The Waters And Sediments Of Florida State Parks, Luciana M. Banquero, Kate Mclendon, Andres Alatorre, Mackenzie Daniels, Savanna Freeman, Cassidy Starke, Katherine Harris, Sidney J. Busch

The Pegasus Review: UCF Undergraduate Research Journal

Man-made materials (MMM) are pollutants introduced to the environment by human activity. Microplastics (MP) are a type of MMM that threaten living organisms through bioaccumulation. The term MMM also encompasses pollutants produced from natural materials, such as rayon and microfibrillated cellulose, which are used in food packaging. This study aims to determine the extent of MMM pollution within estuaries in two of Florida’s state parks, as well as the effectiveness of using restored vegetation on shorelines to reduce MMM pollution. Tomoka State Park and Gamble Rogers State Park were selected at the request of the Florida Department of Environmental Protection. …


Determining The Extent Of Pioneer Mangrove Acidification On Intertidal Oyster Reefs, Cindy Whitten, Andres Alatorre, Nicole Campbell, Savanna Freeman, Sydney Henderson, Kate Mclendon, Connor Wright, June Davison, Madison Ganci, Katherine Harris Dec 2023

Determining The Extent Of Pioneer Mangrove Acidification On Intertidal Oyster Reefs, Cindy Whitten, Andres Alatorre, Nicole Campbell, Savanna Freeman, Sydney Henderson, Kate Mclendon, Connor Wright, June Davison, Madison Ganci, Katherine Harris

The Pegasus Review: UCF Undergraduate Research Journal

The Indian River Lagoon (IRL) stretches 251 kilometers along Florida’s east coast and is one of the most biodiverse estuaries in North America. Mosquito Lagoon, the northernmost portion of the IRL, is home to mangroves and intertidal oyster reefs that provide numerous ecosystem services. These two habitats are overlapping as climate change drives mangroves poleward. Scientists have documented mangrove expansion and the transition of oyster reef habitat to mangrove islands. Past studies have shown large, adult mangrove stands drive soil acidification. The goal of this study was to understand if stand-alone, or pioneer, Rhizophora mangle (red mangroves) and Avicennia germinans …


Vertebrate Animal Behaviors And Abundances On Estuarine Shorelines Stabilized With Biodegradable Materials Utilizing Wildlife Cameras, Katherine Guise Jun 2023

Vertebrate Animal Behaviors And Abundances On Estuarine Shorelines Stabilized With Biodegradable Materials Utilizing Wildlife Cameras, Katherine Guise

The Pegasus Review: UCF Undergraduate Research Journal

Living shoreline stabilization is a restoration technique that utilizes natural materials as breakwaters, plus vegetation landward of the breakwaters, to protect coastlines. This research does not provide information about how new, biodegradable restoration materials affect vertebrates that utilize these shorelines. For this project, I monitored 18 restoration sites along Canaveral National Seashore with wildlife trail cameras: 3 made with cement-infused jute breakwaters, 3 with metal gabion oyster shell breakwaters, and 4 with previously used breakwaters manufactured from plastic mesh oyster shell bags. This project used 4 sites as positive controls (intact vegetation) and 4 as negative controls (highly eroded, no …


Variation In Genetic Structure And Dispersal Of Juvenile Green Turtles, Gustavo Stahelin Jan 2023

Variation In Genetic Structure And Dispersal Of Juvenile Green Turtles, Gustavo Stahelin

Electronic Theses and Dissertations, 2020-

Sea turtles are long-lived, globally distributed animals with a complex life-history. Individuals from different populations often share the same foraging areas (mixed stock aggregations). Understanding patterns of dispersal and connectivity between reproductive populations and mixed stock aggregations is fundamental for the development of effective conservation plans. Recently, green sea turtle (Chelonia mydas) populations in several reproductive areas have increased, providing an opportunity to evaluate how demographic changes in reproductive areas impact dispersal to, and the composition of, mixed stock aggregations. In this dissertation, I evaluated how dispersal from reproductive populations in the Greater Caribbean to mixed stock aggregations may have …


Refining The Use Of Stable Isotope Analysis In Detecting Wildlife Laundering, Kevin Guilfoyle Jan 2023

Refining The Use Of Stable Isotope Analysis In Detecting Wildlife Laundering, Kevin Guilfoyle

Electronic Theses and Dissertations, 2020-

The international wildlife trade has caused significant declines in wild populations. Captive breeding can reduce the pressure on wild populations caused by overcollection, but if not properly monitored, wildlife laundering can lead to further population declines. Improving the forensic ability to detect wildlife laundering will assist in monitoring the wildlife trade and enforcing regulations, thereby aiding recovery of wild populations. Stable isotope analysis has grown in importance as a forensic tool, but improvements are needed. Here, stable isotope analysis (δ13C) on eggshells of captive bred and wild sourced island apple snails (Pomacea maculata) distinguished between the two; eggshells of captive …


Exploring Population Structure And Diversity Across Time In Population Of American Flamingos (Phoenicopterus Ruber), Jessica Folsom Jan 2023

Exploring Population Structure And Diversity Across Time In Population Of American Flamingos (Phoenicopterus Ruber), Jessica Folsom

Electronic Theses and Dissertations, 2020-

Dispersal and connectivity within a population often promotes overall diversity and adaptive potential, therefore a disruption of existing patterns of connectivity by local extinction can have significant consequences for the affected species. However, the extent of these impacts on recovery is not always known. American flamingos (Phoenicopterus ruber) present an ideal opportunity to investigate how changes in gene flow influence within population diversity and genetic structure over the span of a century for a recovering population. Flamingos were highly sought-after by hunters for their meat and feathers, and as a result, the Florida population was extirpated by the beginning of …


Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo Jan 2023

Behavioral, Morphological And Genetic Differentiation Among Populations Of Enyaliopsis, Laura Macamo

Electronic Theses and Dissertations, 2020-

The study of biodiversity is a fundamental part of the study of the ecosystem's function and stability and how changes in the habitat shape the interaction between species. In recent years, the classification of species benefited from the analysis of several types of data to aid the distinction of morphologically similar species. Enyaliopsis iaculator (Naskrecki and Guta, 2019) is a species endemic to central Mozambique. Different populations of E. iaculator were reported to exhibit differences in the time of the day the mating call is displayed, but no morphological differences were reported. Since call behavior tends to be species specific …


Dormant Propagules In Demographic Studies: A Recurrent Bias And Potential Solutions, Federico Borghesi Jan 2023

Dormant Propagules In Demographic Studies: A Recurrent Bias And Potential Solutions, Federico Borghesi

Graduate Thesis and Dissertation 2023-2024

In the face of unprecedented anthropogenic change, we increasingly turn to emergent technologies and extensive data sets for solutions that complement much needed systemic changes in our societies. These technological solutions, however, must be approached with care. We must recognize and address biases in the way data has been accumulated. In demographic studies, dormant life stages, such as seed banks, and other cryptic factors have often been neglected. The potential consequences of these omissions have been extensively described in the literature. In the first chapter, I analyze patterns of seed bank omissions in demographic models, finding unjustified omissions are widespread …


Clay As A Control Technique For Karenia Brevis: Water Chemistry Dynamics And Physiological Impacts On Benthic Invertebrates, Victoria Devillier Jan 2023

Clay As A Control Technique For Karenia Brevis: Water Chemistry Dynamics And Physiological Impacts On Benthic Invertebrates, Victoria Devillier

Graduate Thesis and Dissertation 2023-2024

Clay-based compounds are globally the most advanced and widely used method of direct suppression of marine harmful algal blooms, and are currently undergoing investigation as an option to control Karenia brevis blooms in Florida. Before clay may be accepted for widespread use, there are multiple concerns and challenges that must be addressed regarding the environmental safety of this method, such as effects on water quality, the fate of toxins, and potential impacts of clay treatment to non-target organisms. To contribute to ongoing assessments of clay as a potential control method for K. brevis blooms, we conducted experiments with a formulation …


Evolutionary History And Adaptation To Salinity In American Alligators, John Konvalina Jan 2023

Evolutionary History And Adaptation To Salinity In American Alligators, John Konvalina

Electronic Theses and Dissertations, 2020-

Stressful environments can commonly be found at the edge of a species range and may be a driver for adaption in suboptimal environments. Furthermore, the edge of a species' range can expand and contract over time, resulting in multiple independent invasions of the same stressful habitat. Elucidating population genetic structure and demographic history can aid in determining the which geologic factors impact range distributions and when climatic changes occurred driving genetic patterns observed in contemporary populations. Moreover, populations at the edge of the species range may adapt to the stressful environments that occur at the range edge and exhibit genetic …


Investigating Plant Physiological Responses To Global Phylogenetic Diversity Of Glomeromycotina, David Z. Mowbray Jan 2023

Investigating Plant Physiological Responses To Global Phylogenetic Diversity Of Glomeromycotina, David Z. Mowbray

Honors Undergraduate Theses

Arbuscular mycorrhizal (AM) fungi are ubiquitous symbionts of terrestrial plant species with associations predominantly characterized as mutualistic. In addition to well-documented enhancement of host growth response, more recent analyses have demonstrated the conferral of host benefits under numerous biotic and abiotic stressors. However, much of the established evidence originates from studies involving limited AM fungal diversity. Accordingly, this study sought to evaluate the potential effects of inoculation on plant host physiological traits within a growth chamber environment, investigate potential correlations between host trait responses, & assess the degree of phylogenetic signal observed in trait responses due to the presence of …


The Y-Chromosome's Role In Sexually Dimorphic Evolution And Mother's Curse Compensation, Tobias Nielsen Dec 2022

The Y-Chromosome's Role In Sexually Dimorphic Evolution And Mother's Curse Compensation, Tobias Nielsen

Electronic Theses and Dissertations, 2020-

The Y-chromosome and mitochondria (containing mtDNA) appear entirely dissimilar, the former being a sex chromosome found in the nucleus and the latter an organelle with thousands of copies in the cytoplasm. However, both experience uniparental inheritance, with Y-chromosomes being patrilineal and mitochondria matrilineal. This leads to various other similarities including haploidy, high mutation rates, and limited or lack of genetic recombination. Moreover, the low number of protein-coding genes contained on both led to the belief that neither contributes significantly to the adaptive evolution of complex traits. However, recent studies show the Y-chromosome and mitochondria both influence roughly 10% of male …


Synergistic Impacts Of Climate Change And Human Induced Stressors On The Apalachicola Bay Food Web, Kira Allen Jan 2022

Synergistic Impacts Of Climate Change And Human Induced Stressors On The Apalachicola Bay Food Web, Kira Allen

Electronic Theses and Dissertations, 2020-

Apalachicola Bay, an estuary located in northwest Florida, is likely to experience an increase in climate change and human-induced stressors, such as sea level rise and changes in freshwater inflow, in the future. A coupled hydrodynamic and food web modeling approach was used to simulate future scenarios of low and high river flow and sea level rise in Apalachicola Bay from 2020 to 2049 and demonstrate the range of temporal and spatial changes in water temperature, salinity, fisheries species populations and the broader food web. Concurrent with model development, a survey of Apalachicola Bay stakeholders was conducted to assess stakeholder …


Microplastic Abundances In The Guana River Estuary In Northeast Florida, Mckenna Keplinger Jan 2022

Microplastic Abundances In The Guana River Estuary In Northeast Florida, Mckenna Keplinger

Honors Undergraduate Theses

Plastic never fully disappears, but instead breaks into smaller pieces referred to as microplastics (< 5 mm length). Microplastics are common worldwide, and more studies are needed to understand the accumulation and diversity of microplastics found in various environments. In this study, six locations were sampled for one year in the Guana River Estuary, a partially impounded system with heavily urbanized headwaters. This study was conducted in conjunction with the Guana Tolomato Matanzas National Estuarine Research Reserve (GTM NERR) and the Florida Fish and Wildlife Conservation Commission (FWC) at their water sampling stations. The objectives of this study were to investigate: 1) distribution patterns across sample sites over time, 2) the color, size, and shape of microplastics found, and 3) polymer composition. Water samples were collected from surface waters in 1-L bottles, with five replicates at each site. Sampling occurred once a month, at the beginning of each month from August 2020-August 2021. Samples were analyzed for abundance and characteristics of microplastics using a dissecting microscope and the polymer composition was determined using Fourier-transform infrared spectroscopy. No pattern was found in the distribution of microplastics from north to south or over time. Variations in plastic color, size, and polymer composition suggests that there are multiple sources of pollution into the Guana River Estuary.


Juvenile Dispersal And Genetic Connectivity In The Sea Turtle 'Lost Years', Katrina Phillips Jan 2022

Juvenile Dispersal And Genetic Connectivity In The Sea Turtle 'Lost Years', Katrina Phillips

Electronic Theses and Dissertations, 2020-

Juvenile dispersal is a life history strategy found across taxa and habitat types. In this dissertation, I examine juvenile dispersal in an evolutionary context and explore the conditions that support high dispersal, which necessitates subsequent ontogenetic habitat shifts. I use a sea turtle study system to evaluate the genetic and behavioral patterns associated with juvenile dispersal and ontogenetic shifts in marine environments. Specifically, I focus on four sea turtle species found in the northeastern Gulf of Mexico in the early life stage known as the 'lost years': green turtles (Chelonia mydas), Kemp's ridleys (Lepidochelys kempii), loggerheads (Caretta caretta), and hawksbills …


Fibropapillomatosis And Chelonid Herpesvirus 5 Dynamics In Juvenile Green Turtles Of The Indian River Lagoon, Florida, Usa, Jake Kelley Jan 2022

Fibropapillomatosis And Chelonid Herpesvirus 5 Dynamics In Juvenile Green Turtles Of The Indian River Lagoon, Florida, Usa, Jake Kelley

Electronic Theses and Dissertations, 2020-

Fibropapillomatosis (FP) is a tumor-forming sea turtle disease that mainly affects juvenile green turtles (Chelonia mydas) in coastal foraging sites. The cause of FP is unclear, but likely involves the putative pathogen chelonid herpesvirus 5 (ChHV5). The overall dynamics of this disease are poorly understood, in part due to the difficulty of inferring disease and infection statuses of turtles without evidence of FP. In this study, I investigated the FP disease system in juvenile green turtles of the Indian River Lagoon (IRL), Florida, USA, to better understand disease and pathogen dynamics. First, I developed a hierarchical model for predicting FP …


Multiomic Hypotheses Underlying Behavioral Manipulation Of Camponotus Floridanus Ants By Ophiocordyceps Camponoti-Floridani Fungi, Ian Will Jan 2022

Multiomic Hypotheses Underlying Behavioral Manipulation Of Camponotus Floridanus Ants By Ophiocordyceps Camponoti-Floridani Fungi, Ian Will

Electronic Theses and Dissertations, 2020-

Parasitic manipulation of host behavior lies at the intersection of disease, animal behavior, and coevolutionary processes. In many of these interactions, the underpinning biology is brought into sharp focus as they are obligate relationships, under strong selection to bring about specific changes in host behavior that determine if the parasite will transmit or die. However, experimental and molecular techniques to understand these interactions are still developing and identification of the mechanisms of manipulation is a primary goal in the field. As such, we investigated host-parasite interactions between Camponotus floridanus (Florida carpenter ant) and Ophiocordyceps camponoti-floridani (Florida zombie ant fungus) from …


"Reeling In" Juvenile Sportfish Through Coastal Habitat Restoration: Population, Community, And Trophic Responses In The Indian River Lagoon, Florida, Jennifer Loch Jan 2022

"Reeling In" Juvenile Sportfish Through Coastal Habitat Restoration: Population, Community, And Trophic Responses In The Indian River Lagoon, Florida, Jennifer Loch

Electronic Theses and Dissertations, 2020-

Coastal habitats provide crucial nursery habitat for predatory fishes, but they are in decline worldwide, impacting economically important fisheries. Habitat restoration can simultaneously mitigate the effects of habitat loss and benefit predators (e.g., sportfish), although this relationship is understudied. Here, the response of juvenile sportfish to oyster reef and living shoreline restoration is compared to controls in the Indian River Lagoon, Florida prior to and following restoration for up to three years through examination of community (diversity, assemblage), population (abundance), biometric (size, body condition), ontogenetic, and trophic (gut contents, stable isotopes) dynamics. Stable isotopes were used to quantify dietary history, …


Investigating The Phytochemical Profiles Of Wild And Cultivated Blueberries (Vaccinium Spp.) In Central Florida, Anisa Khalid Jan 2022

Investigating The Phytochemical Profiles Of Wild And Cultivated Blueberries (Vaccinium Spp.) In Central Florida, Anisa Khalid

Honors Undergraduate Theses

Blueberries (Vaccinium spp.) are valued for their high nutritional quality and flavor. There are five species in the Vaccinium genus native to the state of Florida, but only three are palatable to humans: V. myrsinites, V. darrowii, and V. corymbosum. While V. darrowii has been studied extensively due to its successful hybridization with northern highbush blueberry cultivars, V. myrsinites and wild V. corymbosum have been understudied. This study aims to 1) quantify the abundance of various phytochemicals in fruits of these wild blueberry species and compare fruit quality both among the wild taxa and two varieties of …


Role Of Biological Clocks In Ant Behavioral Plasticity And Parasitic Manipulation Of Ant Behavior, Biplabendu Das Jan 2022

Role Of Biological Clocks In Ant Behavioral Plasticity And Parasitic Manipulation Of Ant Behavior, Biplabendu Das

Electronic Theses and Dissertations, 2020-

Living organisms exhibit daily rhythms as a way to anticipate predictable fluctuations in their environment. Such daily rhythmicity is the phenotypic outcome of oscillating genes and proteins, driven by an endogenous biological clock. Clock-controlled behavioral rhythms are inherently "flexible" since their phase, amplitude, and period can change throughout an animal's life hallmarked by changes in so-called chronotype. How this inherent plasticity of clock-controlled rhythms is linked to plasticity of behavior is still an open question in biology. Characterizing the various mechanistic links between plasticity of the animal clock and behavioral state will not only shed light on the molecular underpinnings …


Bioprospecting For Improved Floral Fragrance In Wild Sunflower, Jason Anandappa Jan 2022

Bioprospecting For Improved Floral Fragrance In Wild Sunflower, Jason Anandappa

Honors Undergraduate Theses

The cultivation of crop sunflower or Helianthus annuus is a 20 billion USD industry globally. Crop wild relatives of H. annuus have a long history of being used to breed improved traits into cultivated varieties. Cultivated H. annuus is not known to have a pleasant aroma, and at times seed yield is limited by pollination services, particularly in the production of hybrid seed. Improved floral fragrance could improve pollinator attraction and would add value to ornamental sunflowers in the context of the cut-flower industry. If volatile organic compounds that together generate favorable scents are present in wild Helianthus species, they …


Rebecca Fillyaw Ms Thesis Data For Publication In The Journal Sustainability, Rebecca Fillyaw, Melinda Donnelly, Linda Walters Oct 2021

Rebecca Fillyaw Ms Thesis Data For Publication In The Journal Sustainability, Rebecca Fillyaw, Melinda Donnelly, Linda Walters

CEELAB Research Data

By combatting erosion and increasing habitat, mangrove living shorelines are an effective alternative to hard-armoring in tropical and subtropical areas. An experimental red mangrove living shoreline was deployed within Mosquito Lagoon, Florida, using a factorial design to test the impact of mangrove age, breakwater presence, and mangrove placement on mangrove survival within the first year of deployment. Mixed mangrove age treatments were included to identify if seedling (11-month-old) survival could be enhanced by the presence of transitional (23-month-old) and adult (35 to 47-month-old) mangroves. Environmental factors were monitored to detect possible causes of mangrove mortalities. Approximately half (50.6%) of mangroves …


The Behaviors Of A Captive Father-Daughter Pair Of Ateles Geoffroyi Geoffroyi, Felicia Gordian Oct 2021

The Behaviors Of A Captive Father-Daughter Pair Of Ateles Geoffroyi Geoffroyi, Felicia Gordian

The Pegasus Review: UCF Undergraduate Research Journal

The Central Florida Zoo and Botanical Gardens intends to introduce new members to the black-handed spider monkeys (Ateles geoffroyi geoffroyi) enclosure. The behavioral analysis of captive animals within their human-made zoo environments is pertinent information for zookeepers before such an introduction can be made. To contribute to that goal, this study observed the behaviors of a father-daughter pair of black-handed spider monkeys. This study observed their vocalizations, habitat utilization, enrichment utilization, conspecific interactions, and interactions with humans to better understand how they interact with their environment as well as their group dynamics. This behavioral baseline can then be utilized to …


Vertebrate Impact On A Newly Deployed Shoreline Stabilization Project By Wildlife Camera Analysis, Julia Rifenberg, Jason Litwak, Rebecca Fillyaw Mar 2021

Vertebrate Impact On A Newly Deployed Shoreline Stabilization Project By Wildlife Camera Analysis, Julia Rifenberg, Jason Litwak, Rebecca Fillyaw

The Pegasus Review: UCF Undergraduate Research Journal

Living shoreline stabilization is a technique that utilizes plants and other natural elements to protect estuarine coasts. Research has provided minimal information about which vertebrate species utilize living shorelines post-deployment. For this project, ten wildlife cameras were placed along a living shoreline site in Canaveral National Seashore (CANA) to document which vertebrate species utilize the living shoreline and surrounding vegetation. This shoreline was stabilized with red mangroves (Rhizophora mangle) and eastern oyster (Crassostrea virginica) shell bags in June 2019. The cameras, activated by motion sensors, remained at the site for five days a month for seven …


Success Of Glover’S Reef Marine Reserve On Queen Conch (Strombus Gigas) Populations In Belize, Gianna Fanelli, Ciera Jarrett, Sara Joralemon Mar 2021

Success Of Glover’S Reef Marine Reserve On Queen Conch (Strombus Gigas) Populations In Belize, Gianna Fanelli, Ciera Jarrett, Sara Joralemon

The Pegasus Review: UCF Undergraduate Research Journal

The queen conch (Strombus gigas) provides important economic, ecological, and societal benefits to local communities throughout the Caribbean. The species, however, has fallen victim to commercial exploitation and overfishing in many areas. In Belize, even with restricted harvesting seasons, size restrictions, and regulations set by the Convention on International Trade in Endangered Species (CITES), harvesting practices have significantly depleted populations. Marine reserves, including the Glover’s Reef Marine Reserve, were established to protect biodiversity and maintain populations of Belize’s natural coral reefs. Utilizing size, frequency, and evidence of harvesting (shell notches), the 2018 Tropical Marine Biology (BSC 3355) course …


Effects Of Varying Heat Indexes On Habitat Utilization And Behavior On Captive Red-Ruffed Lemurs (Varecia Rubra), Jeffrey Gammon Mar 2021

Effects Of Varying Heat Indexes On Habitat Utilization And Behavior On Captive Red-Ruffed Lemurs (Varecia Rubra), Jeffrey Gammon

The Pegasus Review: UCF Undergraduate Research Journal

The two captive red-ruffed lemurs (Varecia rubra) at the Central Florida Zoo experienced a more temperate climate and utilized a differing habitat than they would in their native range, Madagascar. Proper management of the species in captivity is crucial for its long-term survival as they are critically endangered. Over a four month period, heat index temperature, lemur behavior, and habitat utilization data were collected via an instantaneous scan sample. Variables were analyzed to characterize how variations in heat index alter habitat utilization and behavior of the captive lemurs. As the heat index increased, habitat use became more restricted …


Behavioral Analysis Of The Cryptoprocta Ferox In An Ex-Situ Condition, Emilie Alfonso Feb 2021

Behavioral Analysis Of The Cryptoprocta Ferox In An Ex-Situ Condition, Emilie Alfonso

The Pegasus Review: UCF Undergraduate Research Journal

Fossas (Cryptoprocta ferox) are the top, endemic predators of Madagascar. Their populations are dwindling and are reported as “Vulnerable” by IUCN. In an effort to combat this, zoological facilities have placed the species on a captive breeding program. This study focuses on concerns one of those zoos had about their captive C. ferox. The purpose of this study was to collect activity budgets on the C. ferox to determine if there is a change in behavior due to construction occurring around the C. ferox’s habitat, analyze behavior changes during estrus, determine any behavior changes, as well …


Observational Study Of Two Ex Situ North American River Otters (Lontra Canadensis), Julia Rifenberg Feb 2021

Observational Study Of Two Ex Situ North American River Otters (Lontra Canadensis), Julia Rifenberg

The Pegasus Review: UCF Undergraduate Research Journal

Zoos enable the ability to study how captive conditions impact the behaviors of animals. In this study, I observed two North American river otters housed at the Central Florida Zoo to evaluate behavioral changes after the male had been removed from the female for a month-long medical examination. The aim of this study was to 1) determine if mating behaviors were still occurring between the two river otters following the male’s removal and 2) to assess the welfare of the male and female river otters in captivity by observing their interactions and individual behaviors. Observed behaviors were compared to documented …


Strategies For Successful Mangrove Living Shoreline Stabilizations In Shallow Water Subtropical Estuaries, Rebecca Fillyaw Jan 2021

Strategies For Successful Mangrove Living Shoreline Stabilizations In Shallow Water Subtropical Estuaries, Rebecca Fillyaw

Electronic Theses and Dissertations, 2020-

Mangrove living shorelines are an effective alternative to hard-armoring, which combat erosion while also increasing habitat. To improve the success of future mangrove deployments, an experimental Rhizophora mangle living shoreline was deployed within Mosquito Lagoon, FL. A factorial design was used to test the impact of mangrove age, breakwater presence, and mangrove placement on mangrove survival and growth. Environmental factors were monitored to isolate the reason for mangrove mortalities. Mangrove age was represented by 3 developmental stages: "seedlings" at 11-months-old, "transitionals" at 23-months-old, and "adults" between 35 and 47-months-old. Mixed mangrove age groups were included to identify if seedling survival …


Phototransduction Components In The Visual System Of Hard-Bodied Ticks, Arimar J. López Limas Jan 2021

Phototransduction Components In The Visual System Of Hard-Bodied Ticks, Arimar J. López Limas

Honors Undergraduate Theses

Ticks are terrestrial invertebrate parasites that attach to their hosts to feed on their blood. Ticks are composed of three families: Ixodidae, Argasidae, and Nuttalliellidae. Ixodid ticks include members of the genera Amblyomma, Ixodes, Haemaphysalis, Hyalomma, Dermacentor, and Rhipicephalus. Ticks can transmit diseases to animals and humans, making them an important organism to study. Current tick-bite mitigation strategies include acaricides (harmful if misused), and CO2 traps (effective in decreasing tick abundance, but costly to use). Since the visual system of ticks has not been studied extensively, I expect that by studying their visual system, alternative tick-bite mitigation …