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Articles 1 - 16 of 16
Full-Text Articles in Physical Sciences and Mathematics
Meristic And Morphometric Comparison Of Three Juvenile Alosa Species: Blueback Herring, A Aestivalis; Alewife, A Pseudoharengus; And American Shad, A Sapidissima, Joseph C. Desfosse
Meristic And Morphometric Comparison Of Three Juvenile Alosa Species: Blueback Herring, A Aestivalis; Alewife, A Pseudoharengus; And American Shad, A Sapidissima, Joseph C. Desfosse
Dissertations, Theses, and Masters Projects
No abstract provided.
Pcb Congener Analysis With Hall Electrolytic Conductivity Detection, Robert D. Edstrom
Pcb Congener Analysis With Hall Electrolytic Conductivity Detection, Robert D. Edstrom
Dissertations, Theses, and Masters Projects
This work reports the development of an analytical methodology for the analysis of PCB congeners based on integrating relative retention data provided by other researchers. The retention data were transposed into a multiple retention marker system which provided good precision in the calculation of relative retention indices for PCB congener analysis. Analytical run times for the developed methodology were approximately one hour using a commercially available GC capillary column. A Tracor Model 700A Hall Electrolytic Conductivity Detector (HECD) was employed in the GC detection of Aroclor standards and environmental samples. Responses by the HECD provided good sensitivity and were reasonably …
The Influence Of Tributyltin On Various Aspects Of Activation And Reactive Oxygen Formation In Oyster Toadfish (Opsanus Tau) Macrophages, Charles D. Rice
The Influence Of Tributyltin On Various Aspects Of Activation And Reactive Oxygen Formation In Oyster Toadfish (Opsanus Tau) Macrophages, Charles D. Rice
Dissertations, Theses, and Masters Projects
The effects of tributyltin (TBT) on phorbol myristate acetate (PMA)- and calcium ionophore (A23187)-stimulated peritoneal macrophages from oyster toadfish (Opsanus tau) were evaluated in a luminol-dependent chemiluminescence (CL) assay. PMA-stimulated CL responses were increased by in vitro exposure to 50 ug/L TBT, but depressed to baseline values by 500 ug/L TBT. A23187-stimulated CL increased with 5 ug/L and 50 ug/L TBT, and depressed by 500 ug/L TBT. Responses stimulated by synergistic doses of PMA and A23187 were increased by 50 ug/L TBT and depressed by 500 ug/L TBT. Enhanced PMA- and A23187-stimulated CL following TBT exposure returned to baseline values …
Subsurface Hydrodynamics And Nutrient Exchange Within An Extensive Tidal Freshwater Wetland, William G. Reay
Subsurface Hydrodynamics And Nutrient Exchange Within An Extensive Tidal Freshwater Wetland, William G. Reay
Dissertations, Theses, and Masters Projects
Located between upland and riverine systems, extensive tidal freshwater wetlands are influenced by a variety of recharging water sources and their respective nutrient contents. Conversely, tidal wetlands discharge interstitial waters and solutes to surface waters during periods of aerial exposure. Geohydrologic and model simulation methodology were utilized in order to aid in the understanding of wetland subsurface flow dynamics, its influence upon pore water nutrient chemistry, and its role in nutrient exchange with adjacent surface waters. Interstitial water nutrient chemistry was monitored along three transects extending from the uplands to the creekbank edge. Surface waters were also monitored throughout the …
Distribution Analysis Of Heavy Minerals On The Inner Continental Shelf Of Virginia, Hakan Ozalpasan
Distribution Analysis Of Heavy Minerals On The Inner Continental Shelf Of Virginia, Hakan Ozalpasan
Dissertations, Theses, and Masters Projects
No abstract provided.
Hypoxic Water Transport By Sub-Tidal Circulation From Chesapeake Bay To The Lower Rappahannock Estuary, Ned Burger
Hypoxic Water Transport By Sub-Tidal Circulation From Chesapeake Bay To The Lower Rappahannock Estuary, Ned Burger
Dissertations, Theses, and Masters Projects
No abstract provided.
Bottom Sediment Mobility At The Wolf Trap Site In The Lower Chesapeake Bay, Mary Mckean Howard-Strobel
Bottom Sediment Mobility At The Wolf Trap Site In The Lower Chesapeake Bay, Mary Mckean Howard-Strobel
Dissertations, Theses, and Masters Projects
No abstract provided.
Carbon, Nitrogen, And Phosphorus Discharge From The Altamaha River, Georgia, Frederick A. Hoffman
Carbon, Nitrogen, And Phosphorus Discharge From The Altamaha River, Georgia, Frederick A. Hoffman
Dissertations, Theses, and Masters Projects
No abstract provided.
Cannibalism Experiments With The Blue Crab (Callinectes Sapidus Rathbun): Potential Effects Of Size And Abundance, Christopher A. Peery
Cannibalism Experiments With The Blue Crab (Callinectes Sapidus Rathbun): Potential Effects Of Size And Abundance, Christopher A. Peery
Dissertations, Theses, and Masters Projects
No abstract provided.
Effect Of Nitrogen And Phosphorus Enrichment On Lipid And Fatty Acid Composition Of Estuarine Microplankton, Jia Chen
Dissertations, Theses, and Masters Projects
No abstract provided.
Aspects Of Volume Regulation In Two Estuarine Invertebrates: Glycera Dibranchiata (Annelida) And Modiolus Demissus (Mollusca), Ana Marie Beardsley
Aspects Of Volume Regulation In Two Estuarine Invertebrates: Glycera Dibranchiata (Annelida) And Modiolus Demissus (Mollusca), Ana Marie Beardsley
Dissertations, Theses, and Masters Projects
No abstract provided.
Recruitment And Growth Of Juvenile Crassostrea Virginica (Gmelin) In Relation To Tidal Zonation, George Curtis Roegner
Recruitment And Growth Of Juvenile Crassostrea Virginica (Gmelin) In Relation To Tidal Zonation, George Curtis Roegner
Dissertations, Theses, and Masters Projects
No abstract provided.
Mitochondrial Dna Variation In Striped Bass, Morone Saxatilis, From The Rappahannock River, Virginia, Carol Furman
Mitochondrial Dna Variation In Striped Bass, Morone Saxatilis, From The Rappahannock River, Virginia, Carol Furman
Dissertations, Theses, and Masters Projects
No abstract provided.
The Influence Of Salinity On The Swimming Behavior Of Larval Crassostrea Virginica (Gmelin), Kevin J. Mccarthy
The Influence Of Salinity On The Swimming Behavior Of Larval Crassostrea Virginica (Gmelin), Kevin J. Mccarthy
Dissertations, Theses, and Masters Projects
No abstract provided.
Palatability Of Freshwater Surface Hemiptera To Potential Fish Predators (Lepomis Macrochirus And Gambusia Affinis), Julie Heyward Mounts
Palatability Of Freshwater Surface Hemiptera To Potential Fish Predators (Lepomis Macrochirus And Gambusia Affinis), Julie Heyward Mounts
Dissertations, Theses, and Masters Projects
No abstract provided.
Virginia's Pelagic Recreational Fishery: Biological, Socioeconomic And Fishery Components, Eleanor A. Bochenek
Virginia's Pelagic Recreational Fishery: Biological, Socioeconomic And Fishery Components, Eleanor A. Bochenek
Dissertations, Theses, and Masters Projects
Catch, effort, fleet size and boat owner expenditure data were collected on Virginia's recreational marlin/tuna fishery for the 1983-1985 seasons. Logbooks, dockside interviews and a telephone survey were evaluated to determine which method was the most efficient and effective for collecting and estimating catch and effort for Virginia's pelagic recreational fishery. In 1984, logbooks were used to collect catch and effort data and fishing effort was estimated using Bochenek's method. Very few fishermen returned their logbooks and as a result this data is probably less reliable than the data collected in other years. Due to the poor return of logbooks, …