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Articles 1 - 19 of 19
Full-Text Articles in Physical Sciences and Mathematics
The Human Factor In Size Selectivity In The Sea Scallop, Placopecten Magellanicus Fishery, Arman O. Kaltayev
The Human Factor In Size Selectivity In The Sea Scallop, Placopecten Magellanicus Fishery, Arman O. Kaltayev
Dissertations, Theses, and Masters Projects
No abstract provided.
Application Of Genetic Markers To Provide Species Identification And Define Stock Structure: Analyses Of Selected Marine Fishes Of The Mid -Atlantic Bight, Jan F. Cordes
Dissertations, Theses, and Masters Projects
Molecular markers and techniques were employed to develop a genetic key for the forensic identification of 16 species of Chesapeake Bay sportfishes and to investigate the stock structure of one of those species, the weakfish Cynoscion regalis. Regions within the ATP synthetase 6 (ATPase 6), Cytochrome b , cytochrome c oxidase I, NADH dehydrogenase 4 (ND4), and 12S/16S ribosomal RNA mitochondrial genes were amplified using the polymerase chain reaction (PCR) and digested with a bank of restriction endonucleases to find a genetic marker that exhibited complete interspecific differentiation and low intraspecific variation. Complete separation of all sixteen species was accomplished …
Synoptic Scale Climatic Forcing Of Multispecies Fish Recruitment Patterns In Chesapeake Bay, Robert J. Wood
Synoptic Scale Climatic Forcing Of Multispecies Fish Recruitment Patterns In Chesapeake Bay, Robert J. Wood
Dissertations, Theses, and Masters Projects
Five fishery independent data sets were used to investigate multispecies fish recruitment patterns in Chesapeake Bay (1966--1997). Despite differences in sampling gear, sampled habitat, collection methods, and sampling sites, the strongest multispecies recruitment patterns within each data set (revealed by separate principal components analyses) depict a negative relationship between recruitment of spring spawning anadromous fishes and fall-winter continental shelf spawning species. This pattern dominates both low and high frequency components of the multispecies data. Because these two species groups utilize freshwater and oligohaline reaches of the Bay and its tributaries as springtime nursery areas, this Chesapeake Bay Anadromous-Shelf Spawner (CBASS) …
Across-Shelf Sediment Transport Modeling And Its Application To Storms At Duck, North Carolina, Guan-Hong. Lee
Across-Shelf Sediment Transport Modeling And Its Application To Storms At Duck, North Carolina, Guan-Hong. Lee
Dissertations, Theses, and Masters Projects
To understand the morphodynamics of the inner shelf, a benthic boundary layer tripod supporting 6 point-measuring current meters, an acoustic Doppler current profiler, and three near-bed profiling acoustic backscatter sensors documented storm and swell conditions during October, 1996, at a depth 13 in on the inner shelf off Duck, North Carolina. The relationship between eddy viscosity and eddy diffusivity during storm and swell conditions was examined using data collected in October 1996 on the inner shelf off Duck, NC. Sediment suspension models, including Rouse-type diffusion models, combined advection and diffusion models, and a Rouse model with a thickened wave boundary …
Efficiency Of Pound-Net Cull Panels: A Comparison Of Size Selectivity And Relative Release For Weakfish (Cynoscion Regalis) And Summer Flounder (Paralichthys Dentatus), Christian Harding Hager
Efficiency Of Pound-Net Cull Panels: A Comparison Of Size Selectivity And Relative Release For Weakfish (Cynoscion Regalis) And Summer Flounder (Paralichthys Dentatus), Christian Harding Hager
Dissertations, Theses, and Masters Projects
No abstract provided.
Biology Of The Spotted Seatrout, Cynoscion Nebulosus, In The Chesapeake Bay Region, Thomas F. Ihde
Biology Of The Spotted Seatrout, Cynoscion Nebulosus, In The Chesapeake Bay Region, Thomas F. Ihde
Dissertations, Theses, and Masters Projects
No abstract provided.
Seasonal Residence, Movement, And Activity Patterns Of Adult Tautog, Tautoga Onitis, In Lower Chesapeake Bay, Michael D. Arendt
Seasonal Residence, Movement, And Activity Patterns Of Adult Tautog, Tautoga Onitis, In Lower Chesapeake Bay, Michael D. Arendt
Dissertations, Theses, and Masters Projects
No abstract provided.
Maturation And Repeat Spawning By American Shad In The York River, Virginia, Kristin L. Maki
Maturation And Repeat Spawning By American Shad In The York River, Virginia, Kristin L. Maki
Dissertations, Theses, and Masters Projects
No abstract provided.
Field Measurement Of Mixed Grain Size Suspension In The Nearshore Under Waves, Grace M. Battisto
Field Measurement Of Mixed Grain Size Suspension In The Nearshore Under Waves, Grace M. Battisto
Dissertations, Theses, and Masters Projects
The Sensor Insertion System (SIS) located at the US Army Corps Field Research Facility (FRF) in Duck, NC, allows closely spaced measurements of along-shore velocity and suspended sediment concentration to be collected across the entire surf zone during storms. The SIS infers suspended sand concentration from backscatter off of suspended material using optical backscatter (OBS) sensors. Unfortunately, OBS response is highly sensitive to grain size, including both differences between sand and mud and variations in size within the sand range. As part of this study, ground-truthing measurements were added to the SIS during a storm in October 1997, including measurements …
Photosynthetic Response And Nutrient Uptake Dynamics Of Phytoplankton In The Ross Sea, Antarctica, Christina Marie Van Hilst
Photosynthetic Response And Nutrient Uptake Dynamics Of Phytoplankton In The Ross Sea, Antarctica, Christina Marie Van Hilst
Dissertations, Theses, and Masters Projects
No abstract provided.
A Framework For Construction And Analysis Of Juvenile Abundance Indices For American Shad (Alosa Sapidissima) In The York River, Virginia, Mary Lynn Aiken
A Framework For Construction And Analysis Of Juvenile Abundance Indices For American Shad (Alosa Sapidissima) In The York River, Virginia, Mary Lynn Aiken
Dissertations, Theses, and Masters Projects
No abstract provided.
Sand- And Clay-Size Mineralogy Of The Ganges And Brahmaputra Rivers: Records Of River Switching And Late-Quaternary Climate Change, David Carlson Heroy
Sand- And Clay-Size Mineralogy Of The Ganges And Brahmaputra Rivers: Records Of River Switching And Late-Quaternary Climate Change, David Carlson Heroy
Dissertations, Theses, and Masters Projects
No abstract provided.
Population Dynamics Of The Smooth Dogfish, Mustelus Canis, In The Northwest Atlantic, Christina L. Conrath
Population Dynamics Of The Smooth Dogfish, Mustelus Canis, In The Northwest Atlantic, Christina L. Conrath
Dissertations, Theses, and Masters Projects
No abstract provided.
The Use Of Long-Lived Tracer Observations To Examine Transport Characteristics In The Lower Stratosphere, Gretchen Scott Lingenfelser
The Use Of Long-Lived Tracer Observations To Examine Transport Characteristics In The Lower Stratosphere, Gretchen Scott Lingenfelser
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Polychlorinated Biphenyl Exposure On Development And Sexual Differentiation In Ranid Tadpoles, Mary J. Rybitski
Effects Of Polychlorinated Biphenyl Exposure On Development And Sexual Differentiation In Ranid Tadpoles, Mary J. Rybitski
Dissertations, Theses, and Masters Projects
The effects of AroclorRTM1242 exposure on developing amphibians were examined by exposing southern leopard frogs, Rana sphenocephala, to a contaminated diet throughout the larval period. Treatment groups consisted of an untreated control, a solvent control, 17beta-estradiol, and three PCB doses (10, 100, and 1000 mug/g). PCB accumulation and biotransformation were examined. Effects of PCB exposure on metamorphosis and sexual differentiation were assessed. PCB accumulation was not statistically different between the egg masses. Levels of PCBs in the tissues differed in a dose related manner. Within treatments, body weight appeared to be the major factor correlated with PCB concentration. Congener patterns …
Assessment Of Spawning And Nursery Habitat Suitability For American Shad (Alosa Sapidissima) In The Mattaponi And Pamunkey Rivers, Donna Marie Bilkovic
Assessment Of Spawning And Nursery Habitat Suitability For American Shad (Alosa Sapidissima) In The Mattaponi And Pamunkey Rivers, Donna Marie Bilkovic
Dissertations, Theses, and Masters Projects
Delineation of essential fish habitat is particularly difficult for migratory fish which utilize large expanses of habitat throughout their life history. This study's main objective was the development and evaluation of habitat assessment tools for the early life stages of American shad (Alosa sapidissima) in two coastal plain rivers. to accomplish this, shad spawning and larval nursery habitats were delineated in the Mattaponi and Pamunkey rivers using presence of eggs and larvae (1997--1999) as evidence of habitat use. A watershed habitat assessment protocol was developed and used to rate habitat based on hydrographic, physical habitat, shoreline and land use parameters. …
Ecological Interactions Between Benthic Oyster Reef Fishes And Oysters, Juliana Maria Harding
Ecological Interactions Between Benthic Oyster Reef Fishes And Oysters, Juliana Maria Harding
Dissertations, Theses, and Masters Projects
Restoration of oyster reef structures rehabilitates habitats and the multi-level ecological communities built on eastern oysters (Crassostrea virginica), the keystone species. Quantitative descriptions of ecological interactions within a habitat are required to delineate essential fish habitats for management and protection. Parallel development of primary (oysters) and secondary trophic levels (benthic fishes) offer an ecological metric of restoration progress over time. The interaction between larval oysters and larval fishes (e.g., Gobiosoma bosc, Chasmodes bosquianus) is quantitatively examined. Oyster settlement estimates for Palace Bar reef, Piankatank River, Virginia are of the same order of magnitude as field densities of recently settled oysters. …
Microgeographic Population Genetic Structure Of The Mummichog (Fundulus Heteroclitus L) Inhabiting An Industrialized Waterway, Luis Felipe Arzayus
Microgeographic Population Genetic Structure Of The Mummichog (Fundulus Heteroclitus L) Inhabiting An Industrialized Waterway, Luis Felipe Arzayus
Dissertations, Theses, and Masters Projects
No abstract provided.
Osteology, Phylogeny, And Biogeography Of The Marine Fish Family Ephippidae (Perciformes, Acanthuroidei), With Comments On Sister Group Relationships, Martin Ray Cavalluzzi
Osteology, Phylogeny, And Biogeography Of The Marine Fish Family Ephippidae (Perciformes, Acanthuroidei), With Comments On Sister Group Relationships, Martin Ray Cavalluzzi
Dissertations, Theses, and Masters Projects
The marine fish family Ephippidae comprises eight genera and 15 species of extant fishes. Spadefishes or batfishes inhabit nearshore tropical to temperate waters. They are almost circumglobal in distribution, with the highest diversity in the Indo-west Pacific and the lowest diversity in the east Pacific and west Atlantic. Fifty-nine potentially informative morphological characters, 10 outgroup taxa, and eight ingroup taxa (i.e., genera) were used to explore sister group hypotheses to the Ephippidae, as well as generate a phylogeny of the Ephippidae. Seven constraint tree analyses were utilized to examine various sister group hypotheses based on previous morphological and molecular analyses …