Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Oyster populations"”.
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Influence of river proximity on water quality and its impact on Caribbean Mangrove Oyster populations : a case study in Bowden Bay, St. Thomas, Jamaica
Þessi rannsókn kannaði hvernig fjarlægð frá opnu hafi og ólífrænir þættir höfðu áhrif á þéttleika og útlit skelja Crassostrea rhizophorae (CR) og Isognomon alatus (IA) í leiruviðaskógi við Bowden Bay, St. Thomas, Jamaíka. Niðurstöðurnar sýndu hærri þéttleika Crassostrea rhizophorae nær opnu hafi. …
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The Effects of Environmental Variability on the Population Structure of the Eastern Oyster (<i>Crassostrea virginica</i>): A Modeling Study
… on the population structure of the Eastern oyster, Crassostrea virginica. The first model, a time-dependent model of the oyster population as described in Powell et al. (1992) and Hofmann et al. (1992, 1995), tracks the distribution, development, spawning, and mortality of sessile oyster …
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Management Recommendations for Restoration of the Degraded Olympia Oyster, Ostrea lurida Carpenter 1864 in Tomales Bay, CA
… addresses the effective restoration of Olympia oyster populations in Tomales Bay, Marin County, California. Chapter 2 provides background information on the Tomales Bay estuary, regional history, and ecology of the Olympia oyster. Following this background discussion, each of the three …
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Modeling Environmental Effects on MSX Prevalence and Intensity in Eastern Oyster (<i>Crassostrea virginica</i>) Populations
<p>An oyster population model coupled with a model for Haplosporidium nelsoni, the causative agent of the oyster disease MSX, was used with salinity time-series constructed from Delaware River flow measurements to study environmentally-induced variations in the annual cycle of this disease. …
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A population dynamic model assessing options for managing eastern oysters (Crassostrea virginica) and triploid Suminoe oysters (Crassostrea ariakensis) in Chesapeake Bay
… the probability of extirpation of local eastern oyster (Crassostrea virginica) populations in the Chesapeake Bay. Management strategies include varying the minimum shell length-at-harvest, harvest rate, and rate and frequency of stocking of oyster seed with respect to varying salinities and …
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Seafood and the American Food System
… first focuses on the gradual decline of American oyster populations on both the Atlantic and Gulf Coasts over the late nineteenth and early twentieth centuries and the impact this had on American cooking and cuisine. The second focuses on the collapse of the menhaden populations off the coast of …
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Investigating Nekton Response to Changing Salinities in the Mississippi Sound: An Experimental and Statistical Approach
… diversion structure, proved catastrophic for oyster populations in the Mississippi Sound, but effects on mobile fish and shellfish species are not well-defined. The planned Mid-Breton Sediment Diversion (MBSD), an initiative to combat wetland loss, is also forecasted to lower salinities in the …
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Early Recruitment of <i>Crassostrea virginica</i> to Restored and Natural Oyster Reefs in the Western Mississippi Sound: Larval Supply and Post-Settlement Success
<p>The eastern oyster (C. virginica) is a foundation species that improves water quality, protects shorelines, provides refuge for other organisms, and contributes to commercial fisheries. Successful early recruitment of eastern oyster is vital for resupplying adult populations in the face of …
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Willingness to Pay for Alternative Programs to Improve Water Quality in the Chesapeake Bay
… to charitable organizations? Third, could oysters in the Chesapeake Bay be successfully marketed as a "green" good? The results from an attribute based choice experiment survey indicate that individuals value process and that they have a higher value for water quality improvement processes …
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Effects of Biofilm Age and Composition on Oyster Larval Setting
The lack of success in restoring oyster, Crassostrea virginica, populations to Chesapeake Bay and its tributaries has raised many questions about why many restoration efforts have failed. A number of studies have focused on the larval stage of oysters and considered the variables that impact oyster …
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Investigating the Response of the Eastern Oyster (Crassostrea virginica) to Low Dissolved Oxygen Conditions
<p>The Eastern oyster <em>(Crassostrea virginica)</em> requires dissolved oxygen (DO) of about 4 mg/L to support proper physiological function. Hypoxia and/or microxia occur when DO decreases to ≤ 2 mg/L. Salinity and temperature changes resulting from large-scale freshwater influx have been …
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Community ecology and population dynamics of the European native oyster (Ostrea edulis) in Essex, UK: A baseline for the management of the Blackwater, Crouch, Roach and Colne Estuaries Marine Conservation Zone
… enhance” remaining stock of the European native oyster, Ostrea edulis. Despite this, little is known about the current distribution, abundance and status of the O. edulis populations within this protected area, with no studies documenting epibenthic species associations with naturally occurring …
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Resetting marine environmental baselines for the United Kingdom: what have we really lost?
… altered shellfish habitats and extirpated oyster populations at several sites around the UK. At a global scale, wild fish landings have been in decline since the late 1980s. However, growth of the global human population means that wild fish availability per capita has in fact been …
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Molecular detection of the apicomplexan parasite 'X' (APX) in bivalves in New Zealand
The flat oyster (Bluff oyster, dredge oyster) Ostrea chilensis is an iconic seafood species in New Zealand that forms the basis of one of the oldest commercial fisheries in the country and is under development for aquaculture. However, the productivity of commercially important flat oyster …
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Structure and development of oyster reefs on the Suwannee River delta, Florida
<p>Three major oyster reefs located off the mouth of the Suwannee River on the west coast of Florida form narrow linear ridges that extend subparallel to shore in directions varying between north and northwest. Two of the reefs, Suwannee Reef and West Gap Reef, form part of an arcuate, …
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Native And Invasive Competitors Of The Eastern Oyster Crassostrea Virginica In Mosquito Lagoon, Florida
Populations of Crassostrea virginica within Mosquito Lagoon, Florida have recently undergone significant die-offs, which are a subject of major concern. Restoration efforts within Mosquito Lagoon are focusing on reconstructing the three-dimensional reef habitats. Before effective protocols can be …
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Identifying inundation-driven effects among intertidal Crassostrea virginica in a commercially important Gulf of Mexico estuary
… on daily inundation and exposure. The eastern oyster Crassostrea virginica is an economically and biologically important sessile intertidal species ranging from Canada to the Gulf of Mexico. Declines and changes in distribution of oyster populations has forced commercial harvesting to spread …