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Articles 31 - 39 of 39
Full-Text Articles in Physical Sciences and Mathematics
Spatial And Temporal Analysis Of Fecal Coliform Distribution In Virginia Coastal Waters, Jie Huang
Spatial And Temporal Analysis Of Fecal Coliform Distribution In Virginia Coastal Waters, Jie Huang
Dissertations, Theses, and Masters Projects
The collection of fecal coliform (FC) monitoring data in shellfish growing waters is primarily to assess public health risks from consumption of contaminated product. The data is also commonly used to assess the potential sources and loads of bacteria entering the aquatic system. This project is intended to extend traditional methods of developing these assessments, by applying an inverse modeling approach to improve the estimation of FC loads in the small watersheds typically contributing to shellfish growing waters in Virginia. Many fecal contamination studies in lower Chesapeake Bay, Virginia, have conveniently focused on analyses over relatively small spatial and temporal …
Effects Of Concurrent Phenathrene And Mycobacterium Marinum Exposure In The Zebrafish (Danio Rerio), Christopher M. Prosser
Effects Of Concurrent Phenathrene And Mycobacterium Marinum Exposure In The Zebrafish (Danio Rerio), Christopher M. Prosser
Dissertations, Theses, and Masters Projects
As a way to gain better understanding of how aquatic organisms respond within their natural environment, this dissertation set up a series of controlled laboratory experiments to investigate the effects of chemical and biological stressors on the zebrafish (Danio rerio). I performed a series of studies in which animals were simultaneously exposed to the toxicant phenanthrene, and infected with the bacterium Mycobacterium marinum. Unexpectedly, we found that at a high dose of phenanthrene (284 mug L-1) results in an antagonistic relationship between stressors with dually challenged fish having significantly higher survivorship than those exposed solely to phenanthrene. Dually challenged fish …
Evaluating The Use Of Flow-Through Larval Culture For The Eastern Oyster, Crassostrea Virginica, Stephanie L. Reiner
Evaluating The Use Of Flow-Through Larval Culture For The Eastern Oyster, Crassostrea Virginica, Stephanie L. Reiner
Dissertations, Theses, and Masters Projects
One system used for bivalve mollusc culture is flowthrough larval culture, which provides a continuous flow of food and seawater to the tank. Flowthrough culture enables larvae to be reared at stocking densities up to 100 larvae/mL, a characteristic that should recommend it as the culture system of choice for the East coast; however, Eastern oyster larvae have never been tested in flowthrough culture, discouraging implementation of the system. The thesis objectives are designed to address questions regarding the survival, growth, competent period, cell consumption, growth efficiency, and cell selection of oyster larvae reared in flowthrough culture. The objectives are: …
Ecological, Physiological, And Bio-Optical Characteristics Of Phaeocystis Globosa In Coastal Waters Of South Central Vietnam, Xiao Liu
Dissertations, Theses, and Masters Projects
No abstract provided.
Abiotic Release Of Low Molecular Weight Nitrogen From Effluent Organic Nitrogen, Carolina P. Funkey
Abiotic Release Of Low Molecular Weight Nitrogen From Effluent Organic Nitrogen, Carolina P. Funkey
Dissertations, Theses, and Masters Projects
No abstract provided.
A Numerical Modeling Study Of Storm Surge And Inundation In The Chesapeake Bay During The November 2009 Mid-Atlantic Nor'easter, Jie Gao
Dissertations, Theses, and Masters Projects
No abstract provided.
Dynamics And Composition Of The Extracellular Polymeric Substances Produced By Benthic Microalgae: An In Situ 13c And 15n Approach, Stephanie Kara Salisbury
Dynamics And Composition Of The Extracellular Polymeric Substances Produced By Benthic Microalgae: An In Situ 13c And 15n Approach, Stephanie Kara Salisbury
Dissertations, Theses, and Masters Projects
The land-‐ocean margin is characterized by a shallow water column, which allows light to reach the benthos and supports a diverse community of benthic autotrophs. One group of benthic autotrophs, consisting of benthic diatoms, cyanobacteria and other photosynthetic microorganisms living near the sediment surface (i.e., benthic microalgae) accounts for a substantial amount of this primary production. Benthic microalgae are also tightly coupled to carbon and nutrient cycling processes carried out by the sediment bacterial community. Benthic microalgae exude complex biopolymers, called extracellular polymeric substances (EPS), which consist mainly of carbohydrates, but can contain proteins and nucleic acids. EPS serves multiple …
Deep-Pelagic (0-3000m) Fish Assemblage Structure Over The Mid-Atlantic Ridge In The Area Of The Charlie-Gibbs Fracture Zone, April B. Cook
Deep-Pelagic (0-3000m) Fish Assemblage Structure Over The Mid-Atlantic Ridge In The Area Of The Charlie-Gibbs Fracture Zone, April B. Cook
Dissertations, Theses, and Masters Projects
Only a miniscule fraction of the world’s largest volume of living space, the ocean’s mid-water biome, has ever been sampled. As part of the International Census of Marine Life field project Mid-Atlantic Ridge Ecosystems (MAR-ECO), a discrete-depth trawling survey was conducted in 2009 aboard the NOAA ship Henry B. Bigelow to examine the pelagic faunal assemblage structure and distribution over the Charlie-Gibbs Fracture Zone (CGFZ) of the northern Mid-Atlantic Ridge. This is the first MAR-ECO project aimed specifically at describing diel vertical migration as a distributional phenomenon. Discrete-depth sampling from 0-3000 m was conducted during both day and night in …
The Effects Of Seagrass Species And Trophic Interactions In Experimental Seagrass Communities, Althea F. P. Moore
The Effects Of Seagrass Species And Trophic Interactions In Experimental Seagrass Communities, Althea F. P. Moore
Dissertations, Theses, and Masters Projects
No abstract provided.