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Articles 1 - 30 of 93
Full-Text Articles in Life Sciences
Distribution Of Shell-Boring Polychaetes At Shellfish Aquaculture Sites Along The Northeast Coast Of The Us, Samantha Silverbrand
Distribution Of Shell-Boring Polychaetes At Shellfish Aquaculture Sites Along The Northeast Coast Of The Us, Samantha Silverbrand
Honors College
Coastal shellfish aquaculture has expanded substantially in recent years in Maine and New England as traditional wild fishery stocks have declined. As shellfish aquaculture has expanded, producers have become more concerned about marine worm pests (i.e., polychaetes) that infest cultured bivalves. In particular, worms from the genus Polydora (also known as “polydorids”) burrow into oyster and scallop shells where they feed and deposit mud. Bivalves cover over the muddy burrows creating blisters that can decrease their market value and hinder growth. Farmers and researchers have identified methods to control infestations of P. websteri, one common species of shell-boring worm. However, …
Ecological And Educational Impacts Of A Living Shoreline On St. Simons Island, Georgia, Usa, C. Tate Holbrook, Cameron Atkinson, Jordan Fountain, Stephanie Knox, Jan Mackinnon
Ecological And Educational Impacts Of A Living Shoreline On St. Simons Island, Georgia, Usa, C. Tate Holbrook, Cameron Atkinson, Jordan Fountain, Stephanie Knox, Jan Mackinnon
Georgia Journal of Science
Living shorelines encompass a range of nature-based alternatives to traditional coastal armoring structures. In addition to shoreline stabilization and protection, living shorelines are intended to meet conservation goals such as restoring habitat, delivering ecosystem services, and promoting ecological resilience to climate change. While early results have been promising, further monitoring is needed to better understand and evaluate the performance of living shorelines across a range of designs and environmental contexts, thereby informing coastal management. Nature-based shoreline protection is relatively new in Georgia, USA, where in 2015 the state’s fourth living shoreline was constructed of oyster shell and native plants on …
Growth Rates, Morphology, And Potential For Mariculture Of The Southern Population Of Crassostrea Virginica In The Lower Laguna Madre, Texas, Jerad Lee Fuelling
Growth Rates, Morphology, And Potential For Mariculture Of The Southern Population Of Crassostrea Virginica In The Lower Laguna Madre, Texas, Jerad Lee Fuelling
Theses and Dissertations
The Eastern Oyster also known as Crassostrea virginica, is an important resource here in the United States. Historically, this species has been overfished, poorly managed, and plagued by disease. Oyster mariculture is a growing industry here in the United States and is a sustainable solution to producing oysters. Texas has become the last coastal state to legalize oyster mariculture which means there is now a vast coastline with many unique bay systems that are open to this industry. One bay system that is particularly unique is the Lower Laguna Madre which is a hypersaline lagoon. Little is known about …
Grow-Out Culture Of Oyster Magallana Bilineata (Röding, 1798) Using Pouches: A Comparison Of Growth And Survival In The River And Earthen Pond, Ma. Junemie Hazel L. Lebata-Ramos, Ellen Flor D. Solis, Mark Jude C. Almeida
Grow-Out Culture Of Oyster Magallana Bilineata (Röding, 1798) Using Pouches: A Comparison Of Growth And Survival In The River And Earthen Pond, Ma. Junemie Hazel L. Lebata-Ramos, Ellen Flor D. Solis, Mark Jude C. Almeida
The Philippine Agricultural Scientist
Oysters are among the most in-demand aquaculture commodities in the Philippines and worldwide. With the decreasing culture area and the deteriorating water quality of oyster beds, there is a need to explore new culture sites and techniques to address the problems of dwindling stocks and the increasing demand for better quality oysters. This study compared the growth and survival of the oysters Magallana bilineata, the new accepted name of Crassostrea iredalei, cultured in an earthen pond and the river using pouches suspended from rafts. Mean growth rates of oysters in length and weight were significantly higher in those …
Nonconsumptive Effects Of Crustaceans And An Echinoderm On Spat Of The Eastern Oyster Crassostrea Virginica (Gmelin, 1791), Maria Rosa, Mike Gilman, Sarah Anderson, Adrian Beckford, Ben Gilfond, Nicole Wright, David M. Hudson
Nonconsumptive Effects Of Crustaceans And An Echinoderm On Spat Of The Eastern Oyster Crassostrea Virginica (Gmelin, 1791), Maria Rosa, Mike Gilman, Sarah Anderson, Adrian Beckford, Ben Gilfond, Nicole Wright, David M. Hudson
Biology Faculty Publications
Predation by crustaceans and echinoderms is a significant driver of mortality for sessile invertebrates in near-shore marine ecosystems. As a response, shellfish growers use predator exclusion cages to grow their product. Oysters grown in these cages and clams in and under nets have been observed to exhibit thinner, brittle shells, which is not optimal for market, nor for those being grown for restoration purposes. Here, the nonconsumptive predator effects of several native and nonnative predators on shell morphology of Crassostrea virginica oyster spat. Juvenile (1–3 mm) seed oysters were exposed separately to chemical cues of five different predators and one …
Turning Algal Biomass Waste Into A Sustainable Substrate For Oyster Settlement, Ariana Liezl M. Lipat
Turning Algal Biomass Waste Into A Sustainable Substrate For Oyster Settlement, Ariana Liezl M. Lipat
Honors College Theses
When an aquatic ecosystem becomes oversaturated with nutrients, algae in the water utilize the excess nitrogen and phosphorus present and grow uncontrollably. This creates algal blooms on the surface of the water that deplete oxygen levels in the water and kill numerous organisms in the process. One method used to solve this issue is through Algal Turf Scrubber (ATS) technology: a natural wastewater treatment process in which water polluted with excess nitrogen and phosphorus is pumped across a floway to be absorbed by a culture of algae before it flows out of the system. The algal biomass is harvested periodically …
Mitigation Of Negative Effects Of Ocean Change On Oysters By Eelgrass And Its Implications For Aquaculture In Midcoast Maine, Fiona G. Ralph
Mitigation Of Negative Effects Of Ocean Change On Oysters By Eelgrass And Its Implications For Aquaculture In Midcoast Maine, Fiona G. Ralph
Honors Projects
Species interactions are important to organisms and to the ecosystems they inhabit. These interactions, sometimes facilitations, can result in increased resiliency for both species. When facilitation occurs, organisms co-assist with physiological and environmental stressors. As anthropogenic impacts become more stressful for modern organisms, these interactions could offer a solution for many species. Ocean acidification has been shown to be detrimental to many calcifying organisms including oysters. More acidic conditions can slow the process of shell calcification, which can slow growth rates. This effect could directly impact the robust oyster farming business in Midcoast Maine. Because of its possible importance to …
Final Report Floating Upwelling System Harvest Road Oceans, Robert Michael, Scott Bennett
Final Report Floating Upwelling System Harvest Road Oceans, Robert Michael, Scott Bennett
Fisheries occasional publications
A Floating Upwelling System or FLUPSY is a mechanical system for the culture of seed stock during the nursery stage of commercial bivalve production.
Vignette 04: Olympia Oysters, Jodie Toft, Betsy Peabody
Vignette 04: Olympia Oysters, Jodie Toft, Betsy Peabody
Institute Publications
Olympia oysters (Ostrea lurida) are our only native oyster species here in the Salish Sea. Olympia oysters once covered an estimated 13-26% of the intertidal area in Puget Sound, mostly near the heads of inlets. A combination of overharvest, pollution, and habitat loss reduced the current population to less than 4% of historic numbers, though sparse numbers of Olympia oysters can still be found throughout most of their historic distribution. Looking to the future, as our region’s marine waters experience effects of climate change and ocean acidification (OA), native species such as the Olympia oyster may prove to …
Natural Variation And Evolutionary Responses To Climate Change Stressors In Marine Invertebrates, Joanna Sarah Griffiths
Natural Variation And Evolutionary Responses To Climate Change Stressors In Marine Invertebrates, Joanna Sarah Griffiths
LSU Doctoral Dissertations
Our rapidly changing climate is putting many species at risk of extinction and there is an urgent need to understand how species will respond to these changes. In this dissertation, I evaluate how three species of marine invertebrates (corals, oysters, and copepods) respond to stressful conditions in their current environments and how plasticity and evolutionary adaptation could alter their response to future climate change stressors. I first employed a space for time study to elucidate population differences in the response of cold-water corals, Balanophyllia elegans, to future ocean acidification. I found evidence that upwelling history (natural low pH exposure) influences …
The “Challenge" Of Depletion: Why The Oyster Fishery Is Not Self-Regulating, Eric N. Powell, John M. Klinck, Leanne M. Poussard
The “Challenge" Of Depletion: Why The Oyster Fishery Is Not Self-Regulating, Eric N. Powell, John M. Klinck, Leanne M. Poussard
CCPO Publications
The possibility that the economics of the oyster fishery impose a self-limitation on overharvesting has been proffered on occasion. The inefficiency of harvesting by the fishery has been evaluated and estimates of the exploitation rate permissible under conditions of maximum sustainable yield have been obtained in previous studies. The question becomes to what extent does the inefficiency of harvest interact with the economics of the fishery to compromise ready detection of overfishing? This study explores the possibility that the constraint of economics on the fishery occurs at oyster exploitation rates that are higher than maximum sustainable yield, leading ineluctably to …
Antimicrobial Properties Of Different Chitosans Against Gram-Negative And Gram-Positive Foodborne Pathogens In Food Products, Nancy Katherine Rubio Zapata
Antimicrobial Properties Of Different Chitosans Against Gram-Negative And Gram-Positive Foodborne Pathogens In Food Products, Nancy Katherine Rubio Zapata
LSU Doctoral Dissertations
Chitosan is a polymer derived of the deacetylation of chitin that is one of the most abundant material in nature. Chitosan solutions applied as edible coatings, and dipping solutions have shown positive results in the extension of shelf life on seafood and meat products. The purpose of this study was to evaluate the antimicrobial activities of a newly invented high molecular weight water-soluble (HMWWS) chitosan against selected Gram-negative (Salmonella Typhimurium, Vibrio parahaemolyticus, Vibrio vulnificus, and Vibrio cholerae) and Gram-positive (Listeria monocytogenes, Staphylococcus aureus, and Bacillus cereus) foodborne pathogens (initial inoculation of 6.5 Log). Chitosans with …
Assessment Of Quantity And Quality Of Microplastics In The Sediments, Waters, Oysters, And Selected Fish Species In Key Sites Along The Bombong Estuary And The Coastal Waters Of Ticalan In San Juan, Batangas, Emilyn Q. Espiritu, Sophia Angeli Sn Dayrit, Annabel Soledad O. Coronel, Natasha Sophia C. Paz, Pilar Isabel L. Ronquillo, Virgil Christian G. Castillo, Erwin P. Enriquez
Assessment Of Quantity And Quality Of Microplastics In The Sediments, Waters, Oysters, And Selected Fish Species In Key Sites Along The Bombong Estuary And The Coastal Waters Of Ticalan In San Juan, Batangas, Emilyn Q. Espiritu, Sophia Angeli Sn Dayrit, Annabel Soledad O. Coronel, Natasha Sophia C. Paz, Pilar Isabel L. Ronquillo, Virgil Christian G. Castillo, Erwin P. Enriquez
Chemistry Faculty Publications
Microplastics (or MPs; < 5 mm in size) pollution is largely unstudied in the Philippines. From an environmental sustainability standpoint, it is important to understand the characteristics, abundance, and environmental fate of plastic debris of various sizes, and these include microplastics that are not more easily and readily detected. In this study, we assessed the extent of microplastics contamination in the sediments, waters, oysters, and selected fishes found in the rivers and coastal areas of Ticalan, Batangas, which were identified from water quality parameters as Class C and CS, respectively. The microplastics were extracted from these samples by chemical digestion of the matrix, series of filtration, and separation by flotation through a density gradient to finally isolate the microplastics which were not dissolved by chemical digestion. The isolated samples were imaged by optical microscopy and characterized based on their descriptive attributes. The results showed the presence of microplastics in all the samples tested, which were found mostly in the form of filaments, fragments, films, and pellets – with most showing weathered, degraded, or angular and irregular surfaces. Identification was done through spectral matching of the Fourier transform infrared spectra of isolated fragments with that of known plastics, although identification in some cases is made uncertain by possibility of degradation of the plastics in the environment. The majority of the isolates showed signature absorption bands of the C-H stretching vibrations of polyethylene-based plastics.
Oysters And Eelgrass: Potential Partners In A High Pco2 Ocean, Maya L. Groner, Colleen A. Burge, Ruth Cox, Natalie D. Rivlin, Mo Turner, Kathryn L. Van Alstyne Dr., Sandy Wyllie-Echeverria, John Bucci, Philip Staudigel, Carolyn S. Friedman
Oysters And Eelgrass: Potential Partners In A High Pco2 Ocean, Maya L. Groner, Colleen A. Burge, Ruth Cox, Natalie D. Rivlin, Mo Turner, Kathryn L. Van Alstyne Dr., Sandy Wyllie-Echeverria, John Bucci, Philip Staudigel, Carolyn S. Friedman
Shannon Point Marine Center Faculty Publications
Ocean acidification (OA) threatens calcifying organisms such as the Pacific oyster, Crassostrea gigas. In contrast, eelgrass, Zostera marina, can benefit from the increase in available carbon for photosynthesis found at a lower seawater pH. Seagrasses can remove dissolved inorganic carbon from OA environments, creating local daytime pH refugia. Pacific oysters may improve the health of eelgrass by filtering out pathogens such as Labyrinthula zosterae, which causes eelgrass wasting disease (EWD). Using a laboratory experiment, we found that co-culture of eelgrass with oysters reduced the severity of EWD. EWD was also reduced in more acidic waters, which negatively …
Sublethal Effects Of Crude Oil And Chemical Dispersant On The Eastern Oyster (Crassostrea Virginica) At Multiple Life History Stages, Sara Marie Garcia
Sublethal Effects Of Crude Oil And Chemical Dispersant On The Eastern Oyster (Crassostrea Virginica) At Multiple Life History Stages, Sara Marie Garcia
USF Tampa Graduate Theses and Dissertations
Oil spills in the marine environment can threaten vulnerable ecosystems that support ecologically and economically significant organisms, such as the eastern oyster (Crassostrea virginica), in coastal habitats. The use of chemical dispersant (Corexit 9500) was applied as a cleanup effort in response to the Deepwater Horizon blowout to minimize crude oil slicks, but also resulted in increased concentrations of polycyclic aromatic hydrocarbons in the water column. The effects of increased soluble fractions of crude oil and dispersant components may be harmful to marine organisms. This study aimed to investigate possible sublethal impacts to the eastern oyster at multiple life history …
Transcriptomic And Epigenetic Responses To Environmental Stress In Marine Bivalves With A Focus On Harmful Algal Blooms, Maria Victoria Suarez Ulloa
Transcriptomic And Epigenetic Responses To Environmental Stress In Marine Bivalves With A Focus On Harmful Algal Blooms, Maria Victoria Suarez Ulloa
FIU Electronic Theses and Dissertations
Global change poses new threats for life in the oceans forcing marine organisms to respond through molecular acclimatory and adaptive strategies. Although bivalve molluscs are particularly tolerant and resilient to environmental stress, they must now face the challenge of more frequent and severe Harmful Algal Blooms (HABs) episodes. These massive outbreaks of microalgae produce toxins that accumulate in the tissues of these filter-feeder organisms, causing changes in their gene expression profiles, which in turn modify their phenotype in order to maintain homeostasis. Such modifications in gene expression are modulated by epigenetic mechanisms elicited by specific environmental stimuli, laying the foundations …
History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte
History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte
VIMS Articles
Oyster populations in Virginia's waters of Chesapeake Bay were lightly exploited until the early 1800s, when industrial fishery vessels first arrived, driven south from New England due to the collapse of northeastern oyster fisheries. Early signs of overexploitation and habitat degradation were evident by the 1850s. The public fishery, where oyster fishers harvest on state-owned bottom, rapidly developed after the Civil War and peaked in the early 1880s. Declines were noted by the late 1880s and eventually prompted the creation of Virginia's shell-planting and oyster-seed (young-of-the-year, YOY) moving repletion program in the 1920s. Despite management and increasing repletion efforts, the …
Investigating The Quantity And Types Of Microplastics In The Organic Tissue Of Oysters And Crabs In The Indian River Lagoon, Heidi Waite
Honors Undergraduate Theses
Microplastics are widespread and abundant. Few studies have examined the diversity and abundance of microplastics in wild organisms. This study determined the microplastic quantity and types in the organic tissues of the eastern oyster Crassostrea virginica and Atlantic mud crab Panopeus herbstii from the Indian River Lagoon (IRL). This study also investigated whether location affected the microplastic abundance and variety. Organisms were collected from three sites across Mosquito Lagoon in the northern IRL. Oysters were frozen after collection. Crabs were placed in containers for 5 days before freezing. The soft organic tissue was chemically digested using hydrogen peroxide, filtered, …
Stakeholders Of The Chesapeake: Curse Of The Eastern Oyster. Subjects: Life Science / Biology, Environmental Science, Marine/Ocean Science Grades: 6-8, Taylor Goelz
Reports
How do we decide how to manage oysters and who has a stake in that management decision? Students are placed in the role of a stakeholder group who cares about what happens to the Eastern oyster and asked to rank management priorities from the perspective of their group and others. Through viewing oyster management through a single perspective, students can begin to understand that balancing stakeholder’s views in setting policy and management is challenging.
Human Norovirus In Artificial And Environmental Marine Water: Development Of Antibody Based Rapid Methods, Morgan Maite
Human Norovirus In Artificial And Environmental Marine Water: Development Of Antibody Based Rapid Methods, Morgan Maite
LSU Doctoral Dissertations
Norovirus (NoV) is the principal cause of viral gastroenteritis in the United States. It has been linked to filter-feeding molluscan shellfish, that bioaccumulate the virus from contaminated surrounding waters. The consumption of raw or undercooked contaminated oysters may result in acute gastroenteritis. We investigated the occurrence of NoV GI and GII and microbial indicators of fecal contamination in oysters and harvesting water from areas along the Louisiana Gulf Coast. We developed a filtration and concentration method for the detection of NoV from oyster harvesting waters. Lastly, this body of work compares commonly used molecular techniques (RT-PCR) and a commercial enzyme …
Practical Oyster Larvae And Remote Deployment Pool, Albert Pollard
Practical Oyster Larvae And Remote Deployment Pool, Albert Pollard
Reports
This grant will evaluate the costs of constructing and operating a 100 bushel “floating pool” in which aged, washed, and containerized shell is placed with purchased larvae for setting on the cultch. The 100 bushel sized pool is being proposed because it is a sample size large enough to test future scalability but small enough to manage as a controlled experiment. In addition, the proposal will compare the setting efficiency of the pool vs the standard upland tanks. Also, we intend to test practicality - after lifting the skirt that forms the pool – of towing the POLARDS Pool (now …
Quantifying Finfish And Blue Crab Use Of Created Oyster Reefs In The Lower Chesapeake Bay, Bruce W. Pfirrmann, Rochelle D. Seitz
Quantifying Finfish And Blue Crab Use Of Created Oyster Reefs In The Lower Chesapeake Bay, Bruce W. Pfirrmann, Rochelle D. Seitz
Presentations
Structurally complex reefs created by the eastern oyster Crassostrea virginica provide a host of ecosystem services yet have experienced significant declines, prompting extensive restoration efforts. We investigate the use of created oyster reefs in the lower Bay by mobile finfish and blue crabs with field surveys and diet analysis. The results of this study provide insight into how restoration activities influence estuarine community dynamics and the provision of ecosystem services.
The Relationship Between Reproduction And Mortality In Triploid Crassostrea Virginica: A Matter Of Economic Importance, Joseph L. Matt, Standish K. Allen
The Relationship Between Reproduction And Mortality In Triploid Crassostrea Virginica: A Matter Of Economic Importance, Joseph L. Matt, Standish K. Allen
Presentations
The goal of this project is to maximize survival for commercially produced triploid Crassostrea virginica oysters in Virginia. Over the last few years, commercial oyster growers in Virginia have reported significant mortality events of triploid oysters during the spring and summer months. The summer of 2014 was the worst yet, as growers across the state reported summer mortality, most severe on the Eastern shore and in some cases as high as 85% of the crop (Karen Hudson, personal communication). Surviving oysters from some of these mortality events were sent to the Virginia Institute of Marine Science and several of the …
Abstracts Of Shellfish Technical Papers, Presented At The Joint Meeting Of The Northeast Aquaculture Conference And Exposition And The 35th Milford Aquaculture Seminar, Portland, Maine, January 14–16, 2015, National Shellfisheries Association
Abstracts Of Shellfish Technical Papers, Presented At The Joint Meeting Of The Northeast Aquaculture Conference And Exposition And The 35th Milford Aquaculture Seminar, Portland, Maine, January 14–16, 2015, National Shellfisheries Association
VIMS Articles
No abstract provided.
Abstracts Of Technical Papers, Presented At The 107th Annual Meeting, National Shellfisheries Association, Monterey, California, March 22–26, 2015, National Shellfisheries Association
Abstracts Of Technical Papers, Presented At The 107th Annual Meeting, National Shellfisheries Association, Monterey, California, March 22–26, 2015, National Shellfisheries Association
VIMS Articles
No abstract provided.
Analysis Of Short-Term Temporal Variation In Densities Of Pathogenic Vibrio Species In Virginia Oysters, Kimberly Huskey
Analysis Of Short-Term Temporal Variation In Densities Of Pathogenic Vibrio Species In Virginia Oysters, Kimberly Huskey
Reports
The objective of this project was to establish the baseline densities of the pathogenic Vibrio parahaemolyticus(Vp) and Vibrio vulnificus(Vv) strains in oysters from Virginia across seasons and over a short time scale.
Estimating Sustainable Harvests Of Eastern Oysters, Crassostrea Virginica, Thomas M. Soniat, Nathan Cooper, Eric N. Powell, John M. Klinck, Mahdi Abdelguerfi, Shengru Tu, Roger Mann, Patrick D. Banks
Estimating Sustainable Harvests Of Eastern Oysters, Crassostrea Virginica, Thomas M. Soniat, Nathan Cooper, Eric N. Powell, John M. Klinck, Mahdi Abdelguerfi, Shengru Tu, Roger Mann, Patrick D. Banks
CCPO Publications
Sustainability of a fishery is traditionally and typically considered achieved if the exploited population does not decline in numbers or biomass over time as a result of fishing relative to biological reference point goals. Oysters, however, exhibit atypical population dynamics compared with many other commercial species. The population dynamics often display extreme natural interannual variation in numbers and biomass, and oysters create their own habitat--the reef itself. With the worldwide decline of oyster reef habitat and the oyster fisheries dependent thereon, the maintenance of shell has received renewed attention as essential to population sustainability. We apply a shell budget model …
Detection Of Clostridium Difficile In Louisiana Oysters, Harvesting Water And Sewage, Da Liu
Detection Of Clostridium Difficile In Louisiana Oysters, Harvesting Water And Sewage, Da Liu
LSU Master's Theses
ABSTRACT Clostridium difficile infection (CDI) was generally considered as a hospital-associated disease; however, recent studies indicated that foods might also play a role in its epidemical chain. From August-2013 to February-2014, oyster samples and harvesting water samples were collected monthly from 6 commercial oyster harvesting areas along Louisiana Gulf Coast and analyzed for total aerobic bacteria, fecal coliforms, coliphage and pathogenic C. difficile. In this study, C. difficile were isolated from 9 (47.37%) of 19 oyster samples and 3 (37.5%) of 8 harvesting water samples and all isolations were carrying the toxin B-encoding gene (tcdB). Toxin B positive C. difficle …
Development Of Safe And Ready To Eat Frozen Oyster Products Using Microwave Steam-Venting Technology, Luis Alberto Espinoza
Development Of Safe And Ready To Eat Frozen Oyster Products Using Microwave Steam-Venting Technology, Luis Alberto Espinoza
LSU Doctoral Dissertations
The Gulf Coast region, principally Louisiana, leads the nation in oyster production. The National Marine Fisheries Service reported that 19.7 million pounds of oyster meat, valued at $62.3 million dollars were harvested from the Gulf Coast region in 2010. One of the main concerns for this industry is the health risk associated with the consumption of oysters, particularly for at-risk populations. Oysters are filter feeders. They tend to concentrate microbes present in surrounding waters, some of which can cause severe illness in susceptible humans. Among pathogens that contaminate the gastrointestinal system of oysters, Vibrio spp (especially V. parahaemolyticus and V. …
Treatments To Reduce The Risk Of Vibrio Species In Vitro And In Shucked Oysters, Ronson Renard Scott
Treatments To Reduce The Risk Of Vibrio Species In Vitro And In Shucked Oysters, Ronson Renard Scott
LSU Master's Theses
"Vibrio parahaemolyticus" (Vp) and "Vibrio vulnificus" (Vv) are halophilic bacteria naturally occurring in estuarine environments that may concentrate in filter feeding shellfish. Consumption of raw or under-cooked seafood contaminated with Vp or Vv may lead to the development of acute gastroenteritis or fatal septicemia in at-risk individuals, respectively. This research encompassed two separate but related projects: evaluation of a low temperature pasteurization (LTP) technique for the reduction of Vp and Vv in commercial quantities of shucked oysters (SO) and the investigation of the efficacy of a citrus fruit extract, BIOSECUR® F440D in reducing/eliminating Vv in vitro. Commercially available SO ("Crassostrea …