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Graduate Theses and Dissertations

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Full-Text Articles in Aquaculture and Fisheries

Extending Spectrophotometric Pht Measurements In Coastal And Estuarine Environments, Nora Katherine Douglas Apr 2018

Extending Spectrophotometric Pht Measurements In Coastal And Estuarine Environments, Nora Katherine Douglas

Graduate Theses and Dissertations

Nearshore and estuarine environments play a vital role in the cycling of carbon, but the effects of ocean acidification in estuarine waters have not been studied as extensively as in the open ocean. One reason for this is the limitation of pH measurement capabilities in low-salinity waters. Typically, pH in these environments has been measured using potentiometric methods that are subject to uncertainties on the order of 0.01. Spectrophotometric methods for measuring pHT offer precision and accuracy superior to those of potentiometric methods. However, previous characterizations for purified sulfonephthalein indicators, used for marine spectrophotometric measurements, are not applicable to ...


The Ecology Of Antibiotic Resistance: Sources And Persistence Of Vancomycin-Resistant Enterococci And Antibiotic Resistant Genes In Aquatic Environments, Suzanne M. Young Nov 2017

The Ecology Of Antibiotic Resistance: Sources And Persistence Of Vancomycin-Resistant Enterococci And Antibiotic Resistant Genes In Aquatic Environments, Suzanne M. Young

Graduate Theses and Dissertations

The growing crisis of antibiotic resistance is a major threat to ecosystems and human health. Infections caused by known and emerging antibiotic resistant pathogens are on the rise globally, with approximately 700,000 deaths per year caused by antibiotic resistant bacteria (1). In the United States, infections from antibiotic resistant bacteria cause more than 2 million illnesses and 23,000 deaths (2). Antibiotic resistant bacteria and antibiotic resistance genes are released into aquatic ecosystems through hospital waste, residential sewer lines and animal agricultural waste streams. Animal agriculture accounts for approximately 70% of antibiotic use in the United States (3). In ...


Whiting Events Off Southwest Florida: Remote Sensing And Field Observations, Jacqueline Long Nov 2016

Whiting Events Off Southwest Florida: Remote Sensing And Field Observations, Jacqueline Long

Graduate Theses and Dissertations

“Whiting” is a term used to describe a sharply defined patch of water that contains high levels of suspended, fine-grained calcium carbonate (CaCO3). These features are named for their bright (at times white) appearance when compared to surrounding waters, and have been found to occur globally, persisting for multiple consecutive days. Although whitings have been widely studied using chemical, biological, geological, and physical techniques, there has been little effort to document their spatio-temporal distributions in a systematic way, not to mention the lack of consensus on what generates whitings and allows them to persist for days to weeks at ...


Diversity And Distribution Of Diatom Endosymbionts In Amphistegina Spp. (Foraminifera) Based On Molecular And Morphological Techniques, Kwasi H. Barnes Jun 2016

Diversity And Distribution Of Diatom Endosymbionts In Amphistegina Spp. (Foraminifera) Based On Molecular And Morphological Techniques, Kwasi H. Barnes

Graduate Theses and Dissertations

Diatoms associated with foraminifers of the genus Amphistegina were assessed using a combination of morphological and molecular techniques. These included: 1) microscopic identification of diatoms cultured from the host, 2) sequencing of portions of the small subunit of the ribosomal RNA gene (18S) and the large subunit of the ribulose-1,5-bisphosphate carboxylase/oxygenase [i.e., RubisCO] gene (rbcL) from DNA extracted directly from the Amphistegina hosts and also from diatoms cultured from these hosts, and 3) denaturing gradient gel electrophoresis (DGGE) profiles of rbcL and internal transcribed spacer 1 (ITS1) PCR amplicons from DNA extracted directly from hosts and from ...


Effects Of Land Use And Invasive Fishes On Prairie Pothole Wetland Condition, Michael David Sundberg Jan 2016

Effects Of Land Use And Invasive Fishes On Prairie Pothole Wetland Condition, Michael David Sundberg

Graduate Theses and Dissertations

Prairie pothole wetlands provide many valuable ecosystem services. However, land use changes in the prairie pothole region (PPR) have increased contaminant loadings and facilitated invasions by fishes, leading to declines in biological diversity and wetland condition. Primary objectives of my thesis research were to 1) quantify direct and indirect relationships among nine environmental attributes, including land use, wetland water volume, herbicides, chloride, invasive fishes, turbidity, plant and invertebrate assemblages, and tiger salamander Ambystoma tigrinum abundance, 2) use these relationships to identify a set of wetland condition metrics, and 3) evaluate how wetland ecosystems responded when invasive fishes were eliminated following ...


Place-Based Communities And Neoliberalism: A Study Of The Artisanal Fishing Community Of Chorrillos, Peru, Héctor Andrés Bombiella Medina Jan 2016

Place-Based Communities And Neoliberalism: A Study Of The Artisanal Fishing Community Of Chorrillos, Peru, Héctor Andrés Bombiella Medina

Graduate Theses and Dissertations

This dissertation is about artisanal fishers in Chorrillos, a small bay near the southern edge of Lima, Peru, and how they use place as an instrument to defend their access to fishing resources on Peru's central coast. The context of this research work includes global neoliberal influences on the Peruvian state and the negotiation of global and local economics, politics, and social issues. Over the last decade, depletion in fish stocks has led to tensions between industrial and artisanal fishers, and demands from the industrial sector to reduce Peruvian state protections for artisanal fishers. Not only are Chorrillos's ...


The Development Of A Fluorescence-Based Reverse Flow Injection Analysis (Rfia) Method For Quantifying Ammonium At Nanomolar Concentrations In Oligotrophic Seawater, William Abbott Nov 2015

The Development Of A Fluorescence-Based Reverse Flow Injection Analysis (Rfia) Method For Quantifying Ammonium At Nanomolar Concentrations In Oligotrophic Seawater, William Abbott

Graduate Theses and Dissertations

The goal of this thesis was to adopt a reverse flow injection analysis (rFIA) technique to the fluorometric analysis of the reaction o-phthaldialdehyde (OPA) with ammonium, allowing accurate measurements of ammonium concentrations lower than the detection limit of the widely used indophenol blue (IPB) colorimetric method while accounting for the background fluorescence of seawater. Ammonium is considered an essential nutrient for primary productivity, especially in the nutrient depleted surface ocean where as the most reduced form of dissolved inorganic nitrogen, it is readily assimilated via metabolic pathways. Challenges in the quantification of ammonium require more sensitive analytical techniques for ...


Vulnerability Of Larval Fish Populations To Oil Well Blowouts In The Northern Gulf Of Mexico, Emily Chancellor Jan 2015

Vulnerability Of Larval Fish Populations To Oil Well Blowouts In The Northern Gulf Of Mexico, Emily Chancellor

Graduate Theses and Dissertations

On April 20th, 2010, a fire broke out on the Deepwater Horizon (DWH) offshore oil drilling rig on the Macondo prospect located off the coast of the Gulf of Mexico (GOM). This fire and resulting explosions resulted in the sinking of the Deepwater Horizon rig and the largest marine oil spill in history. An estimated 4.9 million (+/- 10%) barrels were released into the Gulf of Mexico over the ensuing 87 days. Many economically important fish species spawn in northern Gulf of Mexico waters; the spawning seasons and pelagic larval phase of many of these species occur within the temporal ...


Life Cycle Assessment (Lca) And Techno-Economic Analysis (Tea) Of Various Biosystems, Kun Xie Jan 2015

Life Cycle Assessment (Lca) And Techno-Economic Analysis (Tea) Of Various Biosystems, Kun Xie

Graduate Theses and Dissertations

The fast-growing world population prompts researchers to evaluate both environmental and economic impacts during manufacture and service processing. Distillers dried grains with solubles (DDGS) fractionation and aquaponics are two bioprocesses aiming to make full use of materials and resources. This study conducted Life cycle assessment (LCA) and Techno-economic analysis (TEA) for DDGS fractionation and tilapia-basil aquaponics.

DDGS mainly contains protein, oil, fiber, and ash. DDGS could have more economic value and wider use if it could be separated into higher protein fraction and higher fiber fraction. In our work, the optimization of three parameters of a gravity separator (side slope ...


Urban Fisheries Investigation: Development Of A Site Selection Method For Central Iowa's Urban Ponds, Steven J. Konrady Jan 2015

Urban Fisheries Investigation: Development Of A Site Selection Method For Central Iowa's Urban Ponds, Steven J. Konrady

Graduate Theses and Dissertations

Waning fishing license sales over several decades has provided an impetus for reconnecting with Iowa's 64% urban majority and a modern angler unable or unwilling to travel great distances to fish. One result has been the recent urban fisheries assessments and improvements in Iowa, active in some form for nearly a decade. The goal of the current state project is to establish sustainable fishery resources for Iowa's urban areas. A cooperative effort between the Iowa Department of Natural Resources and Iowa State University focused on assessing a nine-county area in central Iowa from 2010 to 2014. The study ...


Karenia Brevis Harmful Algal Blooms: Their Role In Structuring The Organismal Community On The West Florida Shelf, Alisha Marie Gray May 2014

Karenia Brevis Harmful Algal Blooms: Their Role In Structuring The Organismal Community On The West Florida Shelf, Alisha Marie Gray

Graduate Theses and Dissertations

Karenia brevis dinoflagellate blooms off the west coast of Florida can create devastating effects on marine communities when they release a neurotoxin known as a brevetoxin. These blooms, informally referred to as red tides, can cause massive fish kills, necessitate closures of shellfish fisheries, and can even leave lingering toxins that impact shelf communities long after the bloom has dissipated. As a result, much effort has been put into studying K. brevis bloom initiation and dynamics. However, how K. brevis blooms impact Florida's fisheries is not fully understood because the relationship between K. brevis cell counts and fish mortality ...


Developing An In-Season Predictor Of Commercial Landings For Quota Monitoring In The U.S. Virgin Islands, Mary Janine Vara May 2014

Developing An In-Season Predictor Of Commercial Landings For Quota Monitoring In The U.S. Virgin Islands, Mary Janine Vara

Graduate Theses and Dissertations

The lack of timely reporting of commercial fisheries landings interferes with effective management of fisheries in United States Virgin Islands (USVI). Federal law requires that landings be limited to prevent annual catch limits (ACLs) from being exceeded. Previous attempts to predict total landings have used historic data from prior fishing seasons to predict future landings rather than leveraging available in-season data to provide a more real-time prediction of landings. This study presents an in-season model that predicts total landings using partial reports from the current fishing year. This estimate of total landings, including error bounds around that estimate, can then ...


Ontogenetic Diet Shifts And Prey Preference Of A Generalist Predatory Fish, Brittany Jalene Scharf Jan 2014

Ontogenetic Diet Shifts And Prey Preference Of A Generalist Predatory Fish, Brittany Jalene Scharf

Graduate Theses and Dissertations

Marine ecosystems are highly dynamic and contain a diverse faunal assemblage that are subject to various natural and anthropogenic variability. Globally, seagrass ecosystems are located adjacent to coastal areas that are heavily impacted by human development and urbanization potentially altering the community structure within these ecosystem. Complex food webs connect many components of these systems, often in unexpected ways, and are ultimately based on one of two pathways: benthic (i.e., seagrass, epiphytes, microalgae, detritus) and planktonic (i.e., phytoplankton). Understanding the pathway which the food web is based gives further insight regarding the biological balance of the ecosystem; thus ...


Using Otolith Elemental Composition To Track The Habitat Use, Movements, And Life History Patterns Of Common Snook (Centropomus Undecimalis) And Red Drum (Sciaenops Ocellatus) In The Tampa Bay Estuary, Holly Jacqueline Rolls Jan 2014

Using Otolith Elemental Composition To Track The Habitat Use, Movements, And Life History Patterns Of Common Snook (Centropomus Undecimalis) And Red Drum (Sciaenops Ocellatus) In The Tampa Bay Estuary, Holly Jacqueline Rolls

Graduate Theses and Dissertations

Knowledge of fish habitat use and connectivity is critical for understanding the structure and dynamics of fish populations and, therefore, necessary for the implementation of successful fisheries management strategies. Tagging is an effective means of providing such information, and the elemental composition contained within fish otoliths is increasingly being used as a natural tag. The chemical composition of otoliths reflects the incorporation of elements from different water bodies and can thus be used to understand the habitat use, movements, and life history patterns of fishes. To assess the applicability of otolith elemental composition as a tagging technique within the Tampa ...


Variability In The Spatial And Temporal Patterns Of Larval Scombrid Abundance In The Gulf Of Mexico, Sennai Y. Habtes Jan 2014

Variability In The Spatial And Temporal Patterns Of Larval Scombrid Abundance In The Gulf Of Mexico, Sennai Y. Habtes

Graduate Theses and Dissertations

Accurate fishery-independent methods for assessing the abundance of marine fish stocks are important tools for proper pelagic fisheries management. The review and improvement of standardized sampling methods used in fisheries-independent sampling, and the establishment of improved models of abundance and population dynamics utilizing novel statistical techniques for fisheries management will further improve our understanding of the way in which marine fish stocks vary spatially and temporally. One of the most important and longest running surveys of fisheries-independent data in the Southeastern United States is the spring ichthyoplankton survey conducted through the Southeast Area Mapping and Assessment Program (SEAMAP).

These surveys ...


Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty Jan 2014

Use Of A Towed Camera System For Estimating Reef Fish Populations Densities On The West Florida Shelf, Sarah Elizabeth Grasty

Graduate Theses and Dissertations

Reef fish species tend to reside over high relief habitat which makes them difficult to sample with traditional gears such as nets and trawls. Therefore, implementing and understanding the strengths and weaknesses of new approaches which incorporate acoustic and optical methods has become a priority for reef fish stock assessment. Beginning in June of 2013, a towed camera system known as the Camera-Based Assessment Survey System (C-BASS) has been used to visualize over 500 kilometers of transect and record more than 80 hours of video over several habitats in the Gulf of Mexico. Surveys have been completed on the West ...


Investigation Of Condition Effects On Batch Fecundity Of The Common Snook, Centropomus Undecimalis, In Tampa Bay, Florida, Catherine Michelle Bruger Hayslip Jan 2013

Investigation Of Condition Effects On Batch Fecundity Of The Common Snook, Centropomus Undecimalis, In Tampa Bay, Florida, Catherine Michelle Bruger Hayslip

Graduate Theses and Dissertations

Common snook, Centropomus undecimalis, is a popular game fish species that occurs throughout central and southern Florida, yet many questions remain unanswered regarding their reproductive strategies, including estimates of fecundity with relation to size, age, and condition of the female. These relationships are critical to improving stock assessments and fundamental to estimating spawning potential ratio, the measure by which snook are managed. Spawning snook were collected from a known spawning site, Rattlesnake Key, Tampa Bay, Florida, during three consecutive spawning seasons (2009-2011) and batch fecundity for snook was reported for the first time. Of the 43 females suitable for fecundity ...


Relative Survival Of Gags Mycteroperca Microlepis Released Within A Recreational Hook-And-Line Fishery: Application Of The Cox Regression Model To Control For Heterogeneity In A Large-Scale Mark-Recapture Study, Beverly J. Sauls Jan 2013

Relative Survival Of Gags Mycteroperca Microlepis Released Within A Recreational Hook-And-Line Fishery: Application Of The Cox Regression Model To Control For Heterogeneity In A Large-Scale Mark-Recapture Study, Beverly J. Sauls

Graduate Theses and Dissertations

The objectives of this study were to measure injuries and impairments directly observed from gags Mycteroperca microlepis caught and released within a large-scale recreational fishery, develop methods that may be used to rapidly assess the condition of reef fish discards, and estimate the total portion of discards in the fishery that suffer latent mortality. Fishery observers were placed on for-hire charter and headboat vessels operating in the Gulf of Mexico from June 2009 through December 2012 to directly observe reef fishes as they were caught by recreational anglers fishing with hook-and-line gear. Fish that were not retained by anglers were ...


Molecular Technologies In The Science And Policy Of Florida Largemouth Bass Micropterus Floridanus Management In Florida, Josh Sakmar Jan 2013

Molecular Technologies In The Science And Policy Of Florida Largemouth Bass Micropterus Floridanus Management In Florida, Josh Sakmar

Graduate Theses and Dissertations

Advances in molecular technologies have provided conservation biologist with the opportunity to quantify the genetic structure of a population and, in turn develop management guidelines and policies aimed at preserving the genetic diversity of fish stocks challenged by human activities. This thesis examines the status of genetics as applied to the management of freshwater fisheries by state natural resource agencies with a purpose of understanding the keys to a successful genetics program. An online survey was used to investigate the breadth of molecular marker application to freshwater fisheries management by state natural resource departments. Seven questions were posed to 50 ...


Evaluation Of A Pilot Land-Based Marine Integrated Aquaculture System, Suzanne Boxman Jan 2013

Evaluation Of A Pilot Land-Based Marine Integrated Aquaculture System, Suzanne Boxman

Graduate Theses and Dissertations

Recirculating aquaculture systems (RAS) produce aquaculture products on land with minimal discharge of waste products and minimal water loss. High costs associated with waste treatment for RAS have triggered the growth of integrated aquaculture systems (IAS) which incorporate macrophytes (aquatic plants) into the treatment train. The objective of this research was to examine a pilot scale inland marine IAS with three different methods for solids treatment: a sand filter followed by a plant bed, only a plant bed, and geotextile bags. Florida Pompano (Trachinotus carolinus) were grown along with Smooth Cordgrass (Spartina alterniflora), Black Needle Rush (Juncus romerianus), and Red ...


Hybrid Striped Bass: Culture And Use In Midwestern Waters, James Wamboldt Jan 2013

Hybrid Striped Bass: Culture And Use In Midwestern Waters, James Wamboldt

Graduate Theses and Dissertations

In response to increased demand from fisheries managers, the Iowa Department of Natural Resources and Iowa State University worked to produce standard operating procedures for pond culture of hybrid striped bass Morone saxatilis × M. chrysops in Iowa. In 2011 we evaluated an organic fertilization regime in nutrient rich earthen ponds. In addition to pond fertilization, the role of offering a supplemental commercial feed during phase I culture was also investigated within plastic-lined ponds. With greater utilization and stocking of hybrid striped bass fingerlings in local waters, we also sought to evaluate the effects that introductions have on the trophic dynamics ...


Fish Assemblages In Iowa's Nonwadeable Rivers: Historic Changes In Assemblage Structure And Relationships With Natural And Anthropogenic Environmental Characteristics, Timothy Parks Jan 2013

Fish Assemblages In Iowa's Nonwadeable Rivers: Historic Changes In Assemblage Structure And Relationships With Natural And Anthropogenic Environmental Characteristics, Timothy Parks

Graduate Theses and Dissertations

Nonwadeable or large rivers are dynamic aquatic ecosystems capable supporting high fish biodiversity. Due to human activities on the landscape and in waterways, large rivers and their associated fish assemblages have become increasingly imperiled. It is essential to understand fish response to human activities in order to provide effective management and conservation measures. In response to these concerns, our objectives were to 1) evaluate the historic changes in fish assemblages that occurred in Iowa's interior nonwadeable rivers via representative changes occurring in five focal river systems and 2) determine the relationship between fish assemblage structure and environmental characteristics measured ...


Biophysical Interactions In Prairie Pothole Wetlands Of Iowa: Consequences For Macroinvertebrate Assemblages And Ecosystem Condition, Kristine Maurer Jan 2013

Biophysical Interactions In Prairie Pothole Wetlands Of Iowa: Consequences For Macroinvertebrate Assemblages And Ecosystem Condition, Kristine Maurer

Graduate Theses and Dissertations

Wetlands are capable of supporting diverse assemblages of plants and animals, and performing various ecosystem services (e.g., waterfowl production, flood mitigation). However, the capacity of a wetland to perform these functions is dependent upon its condition (i.e., ecosystem condition, integrity, or health). Wetland condition is affected and reflected by internal (within-system) biophysical features, and interactions among these features. To protect and effectively manage wetlands, it is essential that we identify reliable determinants and indicators of wetland condition. As a result of the inherent complexity of wetland ecosystem interactions, this knowledge is difficult to obtain. The objectives of this ...


Aging Of Florida Blue Crabs, Callinectes Sapidus, Through The Biochemical Extraction Of Lipofuscin, Claire Elizabeth Crowley Jan 2012

Aging Of Florida Blue Crabs, Callinectes Sapidus, Through The Biochemical Extraction Of Lipofuscin, Claire Elizabeth Crowley

Graduate Theses and Dissertations

The blue crab, Callinectes sapidus, represents an ecologically and economically important component of marine and estuarine ecosystems. In Florida, blue crab landings accounted for $9.6 million dollars during the 2010 fishing season. Accurate stock assessments for this valuable fishery are essential. Age is a critical biological component of accurate stock assessments; however, blue crabs and other crustaceans are especially difficult to age because of the complex nature of discrete growth. Biochemical extraction of an aging pigment, lipofuscin, was developed using blue crab eyestalks. The current study investigated the effects of freezing preservation on lipofuscin extracts and examined whether the ...


Characterizing Lentic Fish Assemblages And Community-Environment Relationships: An Evaluation Of Natural Lakes And Reservoirs In Iowa, Usa, Jesse Robert Fischer Jan 2012

Characterizing Lentic Fish Assemblages And Community-Environment Relationships: An Evaluation Of Natural Lakes And Reservoirs In Iowa, Usa, Jesse Robert Fischer

Graduate Theses and Dissertations

Characterizing fish assemblages in lentic ecosystems is difficult due to high habitat heterogeneity and the diversity of methods available to sample fish. Therefore, multiple sampling methods are almost always necessary for gaining reliable estimates of species richness and for sampling different sizes of a particular species. However, most research on the use of multiple sampling methods has targeted recreationally-important species. As such, little information is available regarding the influence of multiple methods and timing (i.e., temporal variation) on characterization of lentic fish assemblages. We sampled six lakes and impoundments seasonally (i.e., spring, summer, fall) with beach seines, benthic ...


Fishermen, Politics, And Participation: An Ethnographic Examination Of Commercial Fisheries Management In St. Croix, U.S. Virgin Islands, Cynthia Grace-Mccaskey Jan 2012

Fishermen, Politics, And Participation: An Ethnographic Examination Of Commercial Fisheries Management In St. Croix, U.S. Virgin Islands, Cynthia Grace-Mccaskey

Graduate Theses and Dissertations

Currently, there is widespread debate regarding the overall status of the world's fisheries, with some researchers projecting their total collapse in only a few decades, and others concluding the situation is not quite as bleak. Additional debates include what strategies should be used to manage fisheries at various scales, and further research is needed to determine which strategies are most appropriate for use in particular situations and locales, as context is critical.

Recently, prominent common pool resources scholars have expressed the need for ethnographic approaches to studying resource management institutions in order to move beyond the current focus of ...


Impacts Of Non-Native Species In A Shallow Lake: A Simulation Modeling Approach For Restoration And Management, Michael Eric Colvin Jan 2012

Impacts Of Non-Native Species In A Shallow Lake: A Simulation Modeling Approach For Restoration And Management, Michael Eric Colvin

Graduate Theses and Dissertations

There is a long use of models in fisheries and ecology. These models have varying assumptions of how underlying processes occur. Chapter 2 found that violating the assumption of continuous fishing could have consequences for managing harvest of fish populations. In particular, as more fish are harvested in a discrete rather than continuous fashion, parameter estimates of biomass dynamics models assuming continuous harvest can be biased. Accounting for discrete harvest using a semi-discrete biomass dynamics model reduced parameter bias and should be used when discrete harvest is occurring.

Extending the exponential semi-discrete biomass dynamics model to an actual population of ...


Status, Distribution, And Habitat Associations Of Topeka Shiners In West-Central Iowa, Bryan David Bakevich Jan 2012

Status, Distribution, And Habitat Associations Of Topeka Shiners In West-Central Iowa, Bryan David Bakevich

Graduate Theses and Dissertations

The distribution of Topeka shiner Notropis topeka has declined across its historic range and was listed as endangered under the Endangered Species Act in 1998. In Iowa, the habitat associations of this imperiled fish are not well understood. Our goals were to understand the current distribution and identify abiotic and biotic factors associated with the occurrence of Topeka shiners in stream and off-channel habitats of west-central Iowa. Fish assemblages and habitat characteristics were sampled in 67 stream and 27 off-channel sites during 2010 - 2011. Topeka shiners were found in 52% off-channel sites, but only 9% of stream sites, supporting the ...


Evaluating Lethal And Sub-Lethal Effects Of Catch-And-Release Angling In Florida's Central Gulf Coast Recreational Atlantic Tarpon (Megalops Atlanticus) Fishery, Kathryn Yvonne Guindon Jan 2011

Evaluating Lethal And Sub-Lethal Effects Of Catch-And-Release Angling In Florida's Central Gulf Coast Recreational Atlantic Tarpon (Megalops Atlanticus) Fishery, Kathryn Yvonne Guindon

Graduate Theses and Dissertations

Atlantic tarpon are sought after because of their fighting ability on various tackle and support a popular, lucrative and predominantly catch-and-release recreational fishery in Florida. They are not commercially harvested or consumed by the general public, therefore assessing effects of catch-and-release angling on tarpon survival is critical to a sustainable fishery. Tarpon caught on artificial breakaway jig and traditional live bait fishing charters in Boca Grande Pass (n=42) and trips from the recreational fishery of Tampa Bay (n=40) were tagged with ultrasonic transmitters and tracked up to 6 hours immediately following release to estimate post-release mortality. Of the ...


Influence Of Temperature On Yolk Resorption By Centropomus Undecimalis Larvae, Claudia Catalina Baron-Aguilar Jan 2011

Influence Of Temperature On Yolk Resorption By Centropomus Undecimalis Larvae, Claudia Catalina Baron-Aguilar

Graduate Theses and Dissertations

In an effort to determine the optimal temperature for rearing Centropomus undecimalis larvae during the yolk resorption period, larval development was measured under four different temperature regimes (23, 25, 28 and 31 °C). The eggs were incubated at 28 °C until hatching, which occurred at about 17 hours post-fertilization. After hatching, temperatures were adjusted to the respective treatment levels. Measurements were collected from 25 individual larvae across rearing temperatures at the following pre-determined time intervals: at hatching, 24 hours post hatch (hph), 48 hph, and 72 hph. Morphometric measurements were obtained from photomicrographs, including yolk sac length and height, oil ...