Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Assay (1)
- Barrier islands (1)
- Blue crab (1)
- Chesapeake Bay (1)
- Circulation (1)
-
- Coastal ecology (1)
- Delmarva Peninsula (1)
- Diet (1)
- Eddies (1)
- Fluid dynamics (1)
- Food quality (1)
- Foraminifera (1)
- Growth (1)
- Gulf Stream (1)
- Gulf of Mexico (1)
- Kinetics (1)
- Larvae (1)
- Lens model (1)
- Light intensity (1)
- Loop current (1)
- Marine biology (1)
- Nutrient stream (1)
- Ocean currents (1)
- Oryzias latipes (1)
- Photoadaptation (1)
- Phytoplankton (1)
- Plankton measurement (1)
- Pollen distribution (1)
- Ring dynamics (1)
Articles 1 - 19 of 19
Full-Text Articles in Physical Sciences and Mathematics
Plankton Transport Patterns And Residence Times Around A Tall Seamount: Simulation Results, Dorlisa Louise Hommel
Plankton Transport Patterns And Residence Times Around A Tall Seamount: Simulation Results, Dorlisa Louise Hommel
OES Theses and Dissertations
A semi-spectral primitive equation circulation model was used to simulate flow over an isolated gaussian seamount. Model configuration was such that a Taylor Cap was generated in the flow over the seamount. Arrays of 100 drifters were released in the simulated flow fields at several depths (50, 100, 200, and 400 m) both upstream and over the seamount. For several experiments vertical behaviors were imposed on the drifters to simulate zooplankton migration patterns. The drifter simulations extended for three months. Drifter transport patterns were determined by the initial release position of the drifter relative to the Taylor Cap as well …
Ring Dynamics In The Western Gulf Of Mexico, Adolphe W. Indest
Ring Dynamics In The Western Gulf Of Mexico, Adolphe W. Indest
OES Theses and Dissertations
The interaction of a recently-formed Loop Current ring and a fossil ring is studied using observations and a two-layered eddy-resolving general circulation model of the Gulf of Mexico. This interaction is investigated by following the evolution of volume, energy, potential vorticity, angular momentum and enstrophy within a model ring as it moves westward and encounters a fossil ring along the continental slope of the Gulf of Mexico. By comparing the model results with drifter and hydrographic data several new insights into ring/ring and ring/slope interactions are seen. A Loop Current ring may merge with a fossil ring along the slope. …
The Growth And Bioenergetics Of Callinectes Sapidus Larvae And The Effects Of Diet Quality On Larval Physiology, James J. Pletl
The Growth And Bioenergetics Of Callinectes Sapidus Larvae And The Effects Of Diet Quality On Larval Physiology, James J. Pletl
OES Theses and Dissertations
Food quality, especially ω3 polyunsaturated fatty acids (PUFA), can affect the physiology and metabolic efficiency of larvae of the blue crab, Callinectes sapidus. These affects may correlate with success in development and juvenile recruitment.
Larvae were exposed to two diets differing quantitatively in ω3 PUFA and respiration, excretion, growth, and feeding rates were measured for each larval stage and the megalopal stage. The energy partitioned to molts and specific dynamic action was also measured. T
he ω3 PUFA enriched diet resulted in a lower respiration rate when compared to the unsupplemented diet, but there was little differences in excretion …
Factors Affecting The Kinetics Of Light Intensity Adaptation In Marine Phytoplankton, Chunzhi Guo
Factors Affecting The Kinetics Of Light Intensity Adaptation In Marine Phytoplankton, Chunzhi Guo
OES Theses and Dissertations
It has been suggested that the recent light history of phytoplankton and the kinetics of photoadaptation can be used to provide information about the vertical mixing processes in the upper mixed layer. To be useful as a parameter in a model of photoadaptation and vertical mixing, the response of a photoadaptive variable to changes in growth irradiance must be monotonic, significant, and comparable in time rate scale to mixing processes. Previous studies of photoadaptation kinetics have focused on the response of phytoplankton to changes in light intensity under continuous illumination. This dissertation attempts to elucidate the effects of light:dark cycle, …
Some Solutions To A Lens Model With Applications To Warm-Core Eddies, Juping Liu
Some Solutions To A Lens Model With Applications To Warm-Core Eddies, Juping Liu
OES Theses and Dissertations
A model of lens-shaped anticyclonic eddies based on nonlinear shallow water equations is developed. The model is a three-layer fluid and allows for one asymmetric mode as well as specified environmental flows. The solution scheme is a polynomial expansion of the field variables. When inserted into the hydrographic equations, the expansion yields eight first-order differential equations for the time dependent amplitudes. This system of ordinary differential equations is numerically tractable. As long as the initial values meet the requirement of elliptical structure and the prescribed external force is tolerable for the initial values, the numerical solutions are stable. Numerical solutions …
Allozyme Analysis Of Billfish Population Structure, Lee W. Morgan
Allozyme Analysis Of Billfish Population Structure, Lee W. Morgan
Dissertations, Theses, and Masters Projects
No abstract provided.
Juvenile Pelagic Fish Communities In The Mattaponi And Pamunkey Rivers, Virginia, Steffany Dawson
Juvenile Pelagic Fish Communities In The Mattaponi And Pamunkey Rivers, Virginia, Steffany Dawson
Dissertations, Theses, and Masters Projects
No abstract provided.
Survival And Abundance Of Juvenile Caribbean Spiny Lobster: Effects Of Shelter Size And Geographic Location, Jonathon Daniel Mintz
Survival And Abundance Of Juvenile Caribbean Spiny Lobster: Effects Of Shelter Size And Geographic Location, Jonathon Daniel Mintz
Dissertations, Theses, and Masters Projects
No abstract provided.
Generic Identification And Patterns Of External Pigment In Larval Gobies (Pisces: Gobiidae) From The Belize Barrier Reef, Elizabeth D. Maddox
Generic Identification And Patterns Of External Pigment In Larval Gobies (Pisces: Gobiidae) From The Belize Barrier Reef, Elizabeth D. Maddox
Dissertations, Theses, and Masters Projects
No abstract provided.
An Investigation Of The Late Pleistocene Paleochannel Systems In The Continental Shelf, South Of Chesapeake Bay Mouth, Ziqiang Chen
An Investigation Of The Late Pleistocene Paleochannel Systems In The Continental Shelf, South Of Chesapeake Bay Mouth, Ziqiang Chen
Dissertations, Theses, and Masters Projects
No abstract provided.
Intentional Introductions Of Non-Indigenous Species: A Case Study Of Policy And Management Affecting Crassostrea Gigas, Gwynne D. Brown
Intentional Introductions Of Non-Indigenous Species: A Case Study Of Policy And Management Affecting Crassostrea Gigas, Gwynne D. Brown
Dissertations, Theses, and Masters Projects
No abstract provided.
A Comparison Of Grow-Out Methods For The Bay Scallop, Argopecten Irradians Irradians, At Two Sites In Virginia, Mark J. Brotman
A Comparison Of Grow-Out Methods For The Bay Scallop, Argopecten Irradians Irradians, At Two Sites In Virginia, Mark J. Brotman
Dissertations, Theses, and Masters Projects
No abstract provided.
Taxonomy Of Larval Blennioidei Of Belize, Central America, Martin Ray Cavalluzzi
Taxonomy Of Larval Blennioidei Of Belize, Central America, Martin Ray Cavalluzzi
Dissertations, Theses, and Masters Projects
No abstract provided.
Role Of Habitat Features And Chemical Cues In Substrate Selection By Blue Crab Megalopae: Evidence From Laboratory Experiments, Bruce Clare Layman
Role Of Habitat Features And Chemical Cues In Substrate Selection By Blue Crab Megalopae: Evidence From Laboratory Experiments, Bruce Clare Layman
Dissertations, Theses, and Masters Projects
No abstract provided.
Measurement Of The Carbon And Nitrogen Densities Of The Marine Heterotrophic Flagellate Paraphysomonas Sp, Yongsik Sin
Measurement Of The Carbon And Nitrogen Densities Of The Marine Heterotrophic Flagellate Paraphysomonas Sp, Yongsik Sin
Dissertations, Theses, and Masters Projects
No abstract provided.
Development And Standardization Of A Short-Term Assay For Evaluating Polluted Estuarine And Coastal Environments: The Medaka Embryo-Larval Assay, Michael Frederick Helmstetter
Development And Standardization Of A Short-Term Assay For Evaluating Polluted Estuarine And Coastal Environments: The Medaka Embryo-Larval Assay, Michael Frederick Helmstetter
OES Theses and Dissertations
The eggs of the Japanese medaka (Oryzias latipes) were employed in a number of studies to develop a routine, standardized assay which can assess the acute and sublethal impacts of individual toxicants and complex mixtures. The eggs of this Cyprinodont minnow were topically treated with each toxicant or mixture dissolved in membrane permeable dimethylsulfoxide (DMSO) solvent. Nine chemicals were initially evaluated with two, pentachlorophenol (PCP) and tributyltin chloride (TBTCl), subsequently selected for extensive evaluations of salinity tolerance and the accuracy of the topical exposure method for representing a typical immersion exposure. The amount of material actually penetrating the eggs was …
Survival Of Juvenile Queen Conch, Strombus Gigas, In Natural Habitats: Impact Of Prey, Predator And Habitat Features, Livingston Sinclair Marshall Jr
Survival Of Juvenile Queen Conch, Strombus Gigas, In Natural Habitats: Impact Of Prey, Predator And Habitat Features, Livingston Sinclair Marshall Jr
Dissertations, Theses, and Masters Projects
In this dissertation, I experimentally examine predation-induced mortality upon juvenile queen conch, Strombus gigas, and assess the importance of select habitat predator and conch characteristics affecting predation intensity. Experiments were conducted during the summer and early fall of 1987, 1988, 1990 and 1991 in seagrass beds and adjacent sand flats near Lee Stocking Island, Exuma Cays, Bahamas. These experiments indicate that various factors act interactively to produce habitat-specific mortality rates in queen conch due to predation. These include (1) habitat type, whereby seagrass beds offer some protection; (2) local population dynamics, such that populated seagrass beds appear to enhance conch …
Diapycnal Mixing And Mass Transfer In Western Boundary Currents, Jose Luis Pelegri Llopart
Diapycnal Mixing And Mass Transfer In Western Boundary Currents, Jose Luis Pelegri Llopart
OES Theses and Dissertations
The distribution of nutrient flux in five sections across the Gulf Stream (from the Florida Straits of 35°W) is characterized by an intense core, centered at the depth of the 26.8 σt isopycnal surface. This 'Nutrient Stream' transports nutrients of O(103 kmol s-1} of nitrate and proportional amounts of other nutrients. Water mass and nutrient balances of nine isopycnal layers reveal significant diapycnal mixing between upper-thermocline and surface waters in the sector of the Stream between the Florida Straits and the Mid-Atlantic Bight. A two-box model of the nutrient-depleted surface layers (σt < 26.8) and the nutrient-rich thermocline layers (26.8< σt < 27.5) shows upward one-way transfer and two-way exchange, both at a a rate at about 1.m2s …
Distribution Of Foraminifera And Pollen In Coastal Depositional Environments Of The Southern Delmarva Peninsula, Virginia, U.S.A., Han Jun Woo
OES Theses and Dissertations
The coastal zone of the southern Delmarva Peninsula exhibits a wide variety of barrier island system subenvironments. This study investigates whether 20 a priori subenvironments can be distinguished from each other on the basis of abiotic environmental variables, pollen assemblages, living foraminiferal populations, and total (living plus dead) foraminiferal assemblages.
The physical data collected from the coastal zone were subjected to canonical variate analysis which discriminated 83% of the stations in 19 groups. These groups were clustered into two internally overlapping sets which represented the inside and outside of the inlet.
Twenty-two pollen types were found in low-energy marsh and …