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Articles 1 - 27 of 27
Full-Text Articles in Life Sciences
Impact Of Artificial Reef Associates On Macrobenthic Community Structure In Florida Bay, Heinz Michael Proft
Impact Of Artificial Reef Associates On Macrobenthic Community Structure In Florida Bay, Heinz Michael Proft
Dissertations, Theses, and Masters Projects
No abstract provided.
Crassostrea Virginica On Constructed Intertidal Oyster Reefs: The Effects Of Tidal Height And Substrate Level On Settlement, Growth, And Mortality, Ian K. Bartol
Dissertations, Theses, and Masters Projects
No abstract provided.
Studies On Processes Controlling The Input Of Agricultural Chemicals In Groundwater To Surface Waters, Edward Laurence Libelo
Studies On Processes Controlling The Input Of Agricultural Chemicals In Groundwater To Surface Waters, Edward Laurence Libelo
Dissertations, Theses, and Masters Projects
This dissertation describes several studies of groundwater quality, the fate and transport of nutrients and atrazine in groundwater systems and physical processes at the sediment-water interface which impact on groundwater discharge. Groundwater monitoring wells were installed at the Goodwins Island and Catlett Island NERRS sites in Virginia and agricultural, suburban and forest land use sites in the York and James River Basins. Groundwater was analyzed for nutrients, pH, salinity and trace organics. Shoreline land use, associated nutrient loading and an estimate of total groundwater flux suggest that groundwater contributes up to 30% of the total nitrogen input to the Chesapeake …
Effects Of Simulated Sediment Resuspension Events On The Abundance Of Water Column Bacteria Of Tomales Bay, California, Christopher J. Collumb
Effects Of Simulated Sediment Resuspension Events On The Abundance Of Water Column Bacteria Of Tomales Bay, California, Christopher J. Collumb
Dissertations, Theses, and Masters Projects
No abstract provided.
Genetic Relationships Among Geographically Isolated Populations Of Bluefish (Pomatamus Saltatrix), Catherine N. O'Neill
Genetic Relationships Among Geographically Isolated Populations Of Bluefish (Pomatamus Saltatrix), Catherine N. O'Neill
Dissertations, Theses, and Masters Projects
No abstract provided.
Uptake, Biotransformation, And Elimination Of Benzo[A]Pyrene By The Gammarid Amphipod Leptocheirus Plumulosus, Caryn M. Huszai
Uptake, Biotransformation, And Elimination Of Benzo[A]Pyrene By The Gammarid Amphipod Leptocheirus Plumulosus, Caryn M. Huszai
Dissertations, Theses, and Masters Projects
No abstract provided.
Spawning And Ecology Of Early Life Stages Of Black Drum, Pogonias Cormis, In Lower Chesapeake Bay, Louis Broaddus Daniel Iii
Spawning And Ecology Of Early Life Stages Of Black Drum, Pogonias Cormis, In Lower Chesapeake Bay, Louis Broaddus Daniel Iii
Dissertations, Theses, and Masters Projects
During spring 1990 and 1991, ichthyoplankton surveys were conducted in lower Chesapeake Bay to estimate seasonal egg production, population biomass and the impact of predation by gelatinous zooplankton on early life stages of black drum, Pogonias cromis. Rearing experiments indicated that at least three species of sciaenid (silver perch, Bairdiella chrysoura; weakfish, Cynoscion regalis and P. cromis) were spawning in the survey area during both years. Specific identification of eggs based on previously published ranges of outside egg diameter (OED) were not reliable due to considerable overlap in diameter distributions. Analysis of weekly OED frequency revealed the presence of three …
Nutrition And Feeding In Striped Bass Morone Saxatilis Larvae: Lipid And Fatty Acid Requirements And Microencapsulated Diets, Sureyya Ozkizilcik
Nutrition And Feeding In Striped Bass Morone Saxatilis Larvae: Lipid And Fatty Acid Requirements And Microencapsulated Diets, Sureyya Ozkizilcik
Dissertations, Theses, and Masters Projects
There has been a growing interest in the commercial aquaculture of striped bass, Morone saxatilis. Little is known, however, about the nutritional requirements and feeding physiology of striped bass larvae. The objectives of this study were (a) to evaluate the efficiency of the live food enrichment techniques in studying the nutritional requirements for polyunsaturated fatty acids (PUFA), phospholipids and free amino acids, (b) to determine the ontogenetic changes of lipolytic enzymes, and (c) to develop a microencapsulated diet for striped bass larvae as full or partial replacement of live food. Three enrichment techniques, namely, microencapsulated fish oil, yeast/fish oil emulsion …
The Early Life Histories Of Three Families Of Cephalopods (Order Teuthoidea) And An Examination Of The Concept Of A Paralarva, Elizabeth Keane Shea
The Early Life Histories Of Three Families Of Cephalopods (Order Teuthoidea) And An Examination Of The Concept Of A Paralarva, Elizabeth Keane Shea
Dissertations, Theses, and Masters Projects
No abstract provided.
Filtration Of Oysters In Patches: Effects Of Water Flow And Seston Composition, Deborah Armitage Harsh
Filtration Of Oysters In Patches: Effects Of Water Flow And Seston Composition, Deborah Armitage Harsh
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Substrate On Hatching Success In Black Skimmers, Rynchops Niger, At The Hampton Roads Bridge-Tunnel, Hampton, Virginia, Crystal Dawn Matthews
Effects Of Substrate On Hatching Success In Black Skimmers, Rynchops Niger, At The Hampton Roads Bridge-Tunnel, Hampton, Virginia, Crystal Dawn Matthews
Dissertations, Theses, and Masters Projects
No abstract provided.
The Vascular Flora Of The Carrotoman River Watershed, Lancaster County, Virginia, Troy W. Weldy
The Vascular Flora Of The Carrotoman River Watershed, Lancaster County, Virginia, Troy W. Weldy
Dissertations, Theses, and Masters Projects
No abstract provided.
Adrenal Zona Reticularis Changes Associated With Pubertal Transition In Control Versus Population-Inhibited Prairie Deermice, Bradley Alan Cherry
Adrenal Zona Reticularis Changes Associated With Pubertal Transition In Control Versus Population-Inhibited Prairie Deermice, Bradley Alan Cherry
Dissertations, Theses, and Masters Projects
No abstract provided.
Tidepool Value As Foraging Patches For Breeding And Migrating Birds In Tidal Salt Marshes In The Lower Chesapeake Bay, Amanda Susan Allen
Tidepool Value As Foraging Patches For Breeding And Migrating Birds In Tidal Salt Marshes In The Lower Chesapeake Bay, Amanda Susan Allen
Dissertations, Theses, and Masters Projects
No abstract provided.
Determination Of The Natal Origin And Genetic Stock Composition Of A Juvenile Feeding Population Of The Loggerhead Turtle (Caretta Caretta) In Chesapeake Bay, Jeffrey Worner Norrgard
Determination Of The Natal Origin And Genetic Stock Composition Of A Juvenile Feeding Population Of The Loggerhead Turtle (Caretta Caretta) In Chesapeake Bay, Jeffrey Worner Norrgard
Dissertations, Theses, and Masters Projects
No abstract provided.
A Correlated Lm/Sem Method For The Morphological Characterization Of Gene Expression In Xenopus Laevis, Laura Rochmis
A Correlated Lm/Sem Method For The Morphological Characterization Of Gene Expression In Xenopus Laevis, Laura Rochmis
Dissertations, Theses, and Masters Projects
No abstract provided.
Phylogenetic Implications Of Sporogenesis Ultrastructure In The Genus Bossiella (Corallinales, Rhodophyta), Kimberly Joy Karnas
Phylogenetic Implications Of Sporogenesis Ultrastructure In The Genus Bossiella (Corallinales, Rhodophyta), Kimberly Joy Karnas
Dissertations, Theses, and Masters Projects
No abstract provided.
Serum Corticosterone Concentrations Related To Seasonal Variation In Reproductive Development In Natural Populations Of Peromyscus Leucopus Noveboracensis, Serena Khosla
Dissertations, Theses, and Masters Projects
No abstract provided.
An Ultra Structural Study Of Sporogenesis, Vegatative Morphology, And Host-Parasite Interactions In Choreonema Thuretii (Corallinales, Rhodophyta), Elizabeth Anne Lapointe
An Ultra Structural Study Of Sporogenesis, Vegatative Morphology, And Host-Parasite Interactions In Choreonema Thuretii (Corallinales, Rhodophyta), Elizabeth Anne Lapointe
Dissertations, Theses, and Masters Projects
No abstract provided.
Reproductive And Feeding Biology Of Selected Syngnathids (Pisces: Teleostei) Of The Western Atlantic, Rogerio Luiz Teixeira
Reproductive And Feeding Biology Of Selected Syngnathids (Pisces: Teleostei) Of The Western Atlantic, Rogerio Luiz Teixeira
Dissertations, Theses, and Masters Projects
The reproductive and feeding biology of five syngnathid species of the western Atlantic were studied: the pipefishes Syngnathus fuscus, S. floridae, the lined seahorse Hippocampus erectus of Chesapeake Bay; and the pipefishes S. folletti and Oostethus lineatus, from southern and southeast Brazil, respectively. Male syngnathids incubate eggs received from females in a ventral brood pouch, females do not play any additional role in parental care after mating. This natural sex role reversal is a unique characteristic that all male syngnathids have. In other fishes, parental care is usually a female prerogative. Most pipefishes are polygamous, while seahorses are monogamous. Syngnathus …
A Study Of The Histozoic Oyster Parasite, Perkinsus Marinus: I. Disease Processes In American Oysters (Crassostrea Virginica). Ii. Biochemistry Of Perkinsus Marinus, Aswani K. Volety
Dissertations, Theses, and Masters Projects
Numerous studies have investigated the disease processes of Perkinsus marinus in the oyster, Crassostrea virginica. However, the transmission dynamics and factors affecting P. marinus infection are still unclear. The objectives of this study were to investigate: (1) the principal and most effective lifestage of P. marinus, (2) the synergistic effects of temperature, salinity and P. marinus dose on disease prevalence, (3) suppression of host reactive oxygen intermediates by P. marinus, (4) the localization of acid phosphatase in the parasite, (5) the effects of temperature and salinity on acid phosphatase secretion, and (6) the P. marinus lipid and fatty acid composition. …
Movements And Ecology Of Summer Flounder, Paralichthys Dentatus, Tagged In The Southern Mid-Atlantic Bight, Joseph C. Desfosse
Movements And Ecology Of Summer Flounder, Paralichthys Dentatus, Tagged In The Southern Mid-Atlantic Bight, Joseph C. Desfosse
Dissertations, Theses, and Masters Projects
A total of 12,323 summer flounder were tagged and released in Chesapeake Bay, the coastal waters off Virginia Beach, and the Eastern Shore during 1987-89. Excluding immediate recaptures, a total of 675 were recaptured for an overall return rate of 5.5%. Returns from the commercial fishery (56.2%) outnumbered those from the recreational fishery (35.7%). The majority of returns (47.1%) came from either Virginia waters or areas to the south, while only 12.8% were from areas to the north of Virginia. offshore returns accounted for 8.5% of the total. Returns with insufficient location data made up the remaining 31.5%. of the …
Elevated Temperatures Perturb Lipopolysaccharide Leading To Increased Serum Complement Sensitivity In Most Gram-Negative Bacteria, Lori Snyder Dudgeon
Elevated Temperatures Perturb Lipopolysaccharide Leading To Increased Serum Complement Sensitivity In Most Gram-Negative Bacteria, Lori Snyder Dudgeon
Dissertations, Theses, and Masters Projects
No abstract provided.
Determinants Of Great Blue Heron (Andea Herodias) Colony Size And Location Along The James And Chickahominy Rivers In Virginia, Kristine Elise Holoman Clements
Determinants Of Great Blue Heron (Andea Herodias) Colony Size And Location Along The James And Chickahominy Rivers In Virginia, Kristine Elise Holoman Clements
Dissertations, Theses, and Masters Projects
No abstract provided.
Immigration Variability And Post-Settlement Processes Of The Spiny Lobster, Panulirus Argus, In The Exuma Cays, Bahamas, Luis Coba-Cetina
Immigration Variability And Post-Settlement Processes Of The Spiny Lobster, Panulirus Argus, In The Exuma Cays, Bahamas, Luis Coba-Cetina
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Sunlight And Seasonal Temperature On Persistence Of Four Bacteriophages In An Estuarine Environment, Terri A. Muller
Effects Of Sunlight And Seasonal Temperature On Persistence Of Four Bacteriophages In An Estuarine Environment, Terri A. Muller
Dissertations, Theses, and Masters Projects
No abstract provided.
Finfish Communities Of Two Intertidal Marshes Of The Goodwin Islands, York River, Virginia, Lisa Ann Ayers
Finfish Communities Of Two Intertidal Marshes Of The Goodwin Islands, York River, Virginia, Lisa Ann Ayers
Dissertations, Theses, and Masters Projects
The finfish communities using the intertidal surfaces of a bay-exposed marsh and a sheltered, channel marsh of the Goodwin Islands, York River, Virginia were studied from May to November 1994. Samples were taken approximately twice monthly using a flume weir at three stations in each marsh. Species composition, abundance and biomass were estimated, and growth patterns and production rates were described for the dominant species. A total of 3001 fish were collected from 11 species and 8 families. Fundulus heteroclitus dominated both marshes and accounted for 83.07% of the total number of fish caught, and 84.83% of the total biomass …