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Articles 1 - 12 of 12
Full-Text Articles in Physical Sciences and Mathematics
Zooplankton Communities In Chesapeake Bay Seagrass Systems, Cathy Elizabeth Meyer
Zooplankton Communities In Chesapeake Bay Seagrass Systems, Cathy Elizabeth Meyer
Dissertations, Theses, and Masters Projects
No abstract provided.
Influence Of Temperature On The Immune Response Of Juvenile Summer Flounder, Paralichthys Dentatus, And Its Role In The Elimination Of Trypanoplasma Bullocki Infections, Joseph P. Sypek
Dissertations, Theses, and Masters Projects
Two groups of juvenile summer flounder maintained at 5�C were experimentally infected with the hemoflagellate Trypanoplasma bullocki. Another group maintained at 5�C was not infected. The water temperature of one infected group was raised stepwise to 12�C, 18�C, and 24�C for 2 to 3 weeks at each level. The other infected group was maintained at 5�C for 12 weeks, the duration of the experiment. In addition, juvenile flounder were collected over a temperature range of 6�C to 22�C from February to June, 1982 to monitor natural infections. Live T. bullocki were incubated in plasma from fish at each temperature to …
Two-Dimensional, Intratidal Model Study Of Salinity Intrusion Structure And Motion In Partially-Mixed Estuaries (Virginia), Carl F. Cerco
Two-Dimensional, Intratidal Model Study Of Salinity Intrusion Structure And Motion In Partially-Mixed Estuaries (Virginia), Carl F. Cerco
Dissertations, Theses, and Masters Projects
A two-dimensional, longitudinal-vertical model for partially-mixed estuaries has been developed. The model provides intratidal predictions of surface level, velocity, and salinity through a semi-implicit finite-difference solution to the continuity and momentum equations and an explicit finite-difference solution to the salinity equation. The model was verified through comparison with analytical solutions, laboratory data, and prototype data. Following verification, the model was used to simulate the destratification-stratification cycle which occurs in the James River Estuary, Virginia, coincident with the spring-neap tidal cycle. In a second application to the James, a simulation of the movement of the salinity intrusion following a storm-generated freshwater …
Effects Of Disruptive Grazing By The Mud Snail Ilyanassa Obsoleta On Mudflat Nematode Populations, David Ludwig
Effects Of Disruptive Grazing By The Mud Snail Ilyanassa Obsoleta On Mudflat Nematode Populations, David Ludwig
Dissertations, Theses, and Masters Projects
Population densities of the mud snail Ilyanassa obsoleta were manipulated in caging experiments on a salt marsh mudflat and in laboratory microcosms. Mud snails outcompete nematodes for food resources, but may increase resources available to deposit feeding groups. Mud snails reduce annelid (polychaete and oligochaete) populations by substrate disruption. Reduced annelid densities provide the nematode community with some release from predation and competition. In mudflat sediments, the nematode community responds to both primary (predation) and secondary (envirorm1ental release, food competition) interactions. Multiple levels of interactive coupling should be considered in any systems level investigation in this habitat.
The Distribution And Ecology Of Gammaridean Amphipods In The Plankton Of The Middle Atlantic Bight, Cathy J. Womack
The Distribution And Ecology Of Gammaridean Amphipods In The Plankton Of The Middle Atlantic Bight, Cathy J. Womack
Dissertations, Theses, and Masters Projects
No abstract provided.
Wave Refraction By Warm Core Rings, George R. Mapp
Wave Refraction By Warm Core Rings, George R. Mapp
Dissertations, Theses, and Masters Projects
No abstract provided.
Waterfowl Utilization Of A Submerged Vegetation (Zostera Marina And Ruppia Maritima) Bed In The Lower Chesapeake Bay, Elizabeth W. Wilkins
Waterfowl Utilization Of A Submerged Vegetation (Zostera Marina And Ruppia Maritima) Bed In The Lower Chesapeake Bay, Elizabeth W. Wilkins
Dissertations, Theses, and Masters Projects
No abstract provided.
The Distribution Of Dissolved Silica And Particulate Biogenic Silica In The James, York And Rappahannock Estuaries, Virginia, Gary F. Anderson
The Distribution Of Dissolved Silica And Particulate Biogenic Silica In The James, York And Rappahannock Estuaries, Virginia, Gary F. Anderson
Dissertations, Theses, and Masters Projects
No abstract provided.
Utilization Of A Zostera Marina And Ruppia Maritima Habitat By Four Decapods With Emphasis On Callinectes Sapidus, Deborah L. Penry
Utilization Of A Zostera Marina And Ruppia Maritima Habitat By Four Decapods With Emphasis On Callinectes Sapidus, Deborah L. Penry
Dissertations, Theses, and Masters Projects
No abstract provided.
Analysis Of Population And Price Aspects Of The Virginia Hard Clam (Mercenaria Mercenaria) Fishery, Andre C. Kvaternik
Analysis Of Population And Price Aspects Of The Virginia Hard Clam (Mercenaria Mercenaria) Fishery, Andre C. Kvaternik
Dissertations, Theses, and Masters Projects
No abstract provided.
Life History And Management Of Spiny Dogfish, Squalus Acanthias, Off The Northeastern United States, Marta Nammack
Life History And Management Of Spiny Dogfish, Squalus Acanthias, Off The Northeastern United States, Marta Nammack
Dissertations, Theses, and Masters Projects
No abstract provided.
A Study Of Nutritional Requirements Of The Larvae Of The American Oyster (Crassostrea Virginica), Fu-Lin E. Chu
A Study Of Nutritional Requirements Of The Larvae Of The American Oyster (Crassostrea Virginica), Fu-Lin E. Chu
Dissertations, Theses, and Masters Projects
The purpose of this study is to obtain information for the formulation of artificial diets for larvae of the American oyster (Crassostrea virginica) and to test procedures related to presenting these diets to the oyster larvae. In order to determine the nutrient components usually provided in larval diets, biochemical analyses of lipids and fatty acids, proteins and amino acids and polysaccharide carbohydrates were performed on five algae species used as a food source for oyster larvae. These algae are Chlorella sp., Pyramimonas virginica, Pseudoisochrysis paradoxa, Pavlova (Monochrysis) lutheri and Isochrysis galbana. The biochemical analyses indicate that the nutritional value of …