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Articles 31 - 60 of 105
Full-Text Articles in Marine Biology
Ontogenetic Diet Shifts In Nassau Grouper: Trophic Linkages And Predatory Impact, Db Eggleson, Jj Grover, Rom Lipcius
Ontogenetic Diet Shifts In Nassau Grouper: Trophic Linkages And Predatory Impact, Db Eggleson, Jj Grover, Rom Lipcius
VIMS Articles
Understanding which fauna and flora from seagrass beds serve as primary food for reef-based commuters is critical in defining trophic linkages between shallow-water habitats of tropical oceanic regions. Although numerous studies have documented the relative importance of crustaceans in the diet of reef fishes associated with tropical seagrass meadows, it is unknown if trophic importance corresponds to a significant effect on prey distribution and abundance patterns. We quantified size-specific diet of juvenile Nassau grouper (Epinephelus striatus) inhabiting natural and artificial patch reefs, and manipulated the density of artificial patch reefs (0, 8, and 16 patch reefs per ha) to examine …
Effects Of Wind Speed And Particulate Matter Source On Surface Microlayer Characteristics And Enrichment Of Organic Matter In Southern Chesapeake Bay, Kewen Liu, Rebecca M. Dickhut
Effects Of Wind Speed And Particulate Matter Source On Surface Microlayer Characteristics And Enrichment Of Organic Matter In Southern Chesapeake Bay, Kewen Liu, Rebecca M. Dickhut
VIMS Articles
Surface microlayer (SM) samples were collected with a rotating cylinder sampler from the York and Elizabeth River estuaries of lower Chesapeake Bay bimonthly from May 1994 through June 1995. Two intensive samplings were also conducted in the York River during different seasons: one in December 1994 and another during June 1995. Four SM samples were collected during each intensive sampling within 4 days. All the samples were analyzed for total suspended particulates (TSP), particulate nitrogen (PN), particulate organic carbon (POC) and dissolved organic carbon(DOC). The thickness of the SM was observed to decrease linearly with increased wind speed. TSP and …
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, Thomas L. Hopkins, Tracey T. Sutton
Marine Science Faculty Publications
Oligotrophic tropical-subtropical oceanic regimes constitute the largest and most ancient ecosystem on earth, with these enormous areas being characterized by high faunal diversity. The stability and age of the ecosystem have enabled the evolution of many similar species niches where there is considerable overlap in niche parameters such as food and space, resulting in high species packing, especially in the epi-and mesopelagic zones. Competition for limited resources undoubtedly exists and has been described by MacArthur (1972; Geographical ecology, Harper and Row, New York) as diffuse competition where each species is impacted by many other species sharing the environment. Most studies …
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, T. L. Hopkins, Tracey Sutton
Midwater Fishes And Shrimps As Competitors And Resource Partitioning In Low Latitude Oligotrophic Ecosystems, T. L. Hopkins, Tracey Sutton
Marine & Environmental Sciences Faculty Articles
Oligotrophic tropical-subtropical oceanic regimes constitute the largest and most ancient ecosystem on earth, with these enormous areas being characterized by high faunal diversity. The stability and age of the ecosystem have enabled the evolution of many similar species niches where there is considerable overlap in niche parameters such as food and space, resulting in high species packing, especially in the epi- and mesopelagic zones. Competition for limited resources undoubtedly exists and has been described by MacArthur (1972; Geographical ecology, Harper and Row, New York) as diffuse competition where each species is impacted by many other species sharing the environment. Most …
Florida Red Tides From A Scientific And Public Information Perspective, Kristen M. Kusek
Florida Red Tides From A Scientific And Public Information Perspective, Kristen M. Kusek
USF Tampa Graduate Theses and Dissertations
This thesis consists of a comprehensive historical review and evaluation of Florida red tide research and a multifaceted analysis of red tide coverage by the St. Petersburg Times from 1953 to 1997. Red tides caused by Gymnodinium breve along the Florida Gulf coast are riddled with complexity; scientists have been asking many of the same questions for nearly 50 years. Red tides also attract considerable media publicity. This thesis addressed the following: 1. What have scientists learned about Florida red tides since G. breve was identified in 1948?, and 2. How well was the issue covered by the newspaper media? …
A Near-Surface Microstructure Sensor System Used During Toga Coare. Part I: Bow Measurements., Alexander Soloviev, Roger Lukas, Sharon Decarlo, Jefrey Snyder, A. Arjannikov, Vyacheslav Turenko, M. Baker, Dmitry Khlebnikov
A Near-Surface Microstructure Sensor System Used During Toga Coare. Part I: Bow Measurements., Alexander Soloviev, Roger Lukas, Sharon Decarlo, Jefrey Snyder, A. Arjannikov, Vyacheslav Turenko, M. Baker, Dmitry Khlebnikov
Marine & Environmental Sciences Faculty Articles
High-resolution probes mounted on the bow of the vessel at a 1.7-m depth in an undisturbed region ahead of the moving vessel were used for microstructure and turbulence measurements in the near-surface layer of the ocean during TOGA COARE. The probes measured temperature, conductivity, pressure, three-component fluctuation velocity, and two components of acceleration. Accumulation of large amounts of high-quality nearsurface data poses a difficult challenge, and deployment from the bow of a ship, such as is done with these sensors, requires rugged, well-calibrated, and low-noise sensors. The heaving motion of the ship that causes the sensors to break through the …
Spring 1998, Nsu Oceanographic Center
Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul
Prophage Induction Of Indigenous Marine Lysogenic Bacteria By Environmental Pollutants, Pamela K. Cochran, Christine A. Kellogg, John H. Paul
Marine Science Faculty Publications
Lysogenic bacteria may be abundant components of bacterial assemblages in marine waters. The tremendous number of viruses found in estuarine and other eutrophic environments may be the result in part of induction of prophages. Mitomycin C is the inducing agent of choice for prophage induction; however this is not naturally found in the marine environment. We determined the capability of environmentally important pollutants to effect prophage induction in natural populations of marine bacteria. We investigated Aroclor 1248, a PCB mixture, bunker C fuel oil #6, and a pesticide mixture as inducing agents for natural bacterial communities from the Gulf of …
Florida Coral Reef Damage From Nuclear Submarine Grounding And Proposed Restoration, Kenneth Banks, Richard E. Dodge (Editor), Lou Fisher, David K. Stout, Walter Jaap
Florida Coral Reef Damage From Nuclear Submarine Grounding And Proposed Restoration, Kenneth Banks, Richard E. Dodge (Editor), Lou Fisher, David K. Stout, Walter Jaap
Marine & Environmental Sciences Faculty Articles
The United States submarine Memphis grounded in approximately 10 m water depth on a tropical coral reef ofT southeast Florida in February, 1993. The grounding caused extensive physical and biological damage to the reef substrate and to the coral community. As part of a claim by the State of Florida against the United States, the impact of the grounding was assessed, and the area of damage was determined through field and photographic studies. A recovery rate for the reef was assigned from literature estimates. The NOAA Habitat Equivalency Model (HEM) was used to calculate the reef area needed to be …
Effect Of Sampling Errors On Estimates Of Recruitment And Fishing Mortality From Separable Virtual Population Analysis, Emmanis Dorval
Effect Of Sampling Errors On Estimates Of Recruitment And Fishing Mortality From Separable Virtual Population Analysis, Emmanis Dorval
Biological Sciences Theses & Dissertations
Separable virtual population analysis (SVPA) models provide estimates of historical recruitment and fishing mortality from analyzing catch data based on the separability of fishing mortality into age specific-gear selection and yearly mortality. These models assume that the catch is randomly sampled and that sampling error is a random variable with constant variance and mean equal to zero. These models do not account for sampling measurement errors that occur when the catch partitioned by age is not measured on every sampling unit without error, and spatio-temporal errors that occur when the observed catch is not representative of the harvested population throughout …
Trophic Diversity Of A Mesopelagic Fish Community., Tracey Sutton, Thomas L. Hopkins, Thomas M. Lancraft
Trophic Diversity Of A Mesopelagic Fish Community., Tracey Sutton, Thomas L. Hopkins, Thomas M. Lancraft
Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures
To understand the character of prey partitioning in a low latitude oligotrophic region, a composite picture of the trophic structure of a mesopelagic fish community was made from the eastern Gulf of Mexico. Two hundred and twenty three species were collected in the area of which I61 species were abundant enough for analyses. Fifteen major categories of prey biomass are identified for diet analyses: viz. copepods, ostracods, amphipods, euphausiids, decapods, larvaceans, salps, coelenterates (primarily siphonophores), unidentified gelatinous prey, polychaetes, gastropods, cephalopods, chaetognaths, fish, other food. Prey partitioning is minimal across major prey categories as the vast majority of mesopelagic fishes …
On The Utility And Disutility Of Jebar, Mark A. Cane, Vladimir M. Kamenkovich, Alexander Krupitsky
On The Utility And Disutility Of Jebar, Mark A. Cane, Vladimir M. Kamenkovich, Alexander Krupitsky
Faculty Publications
The usefulness of the concept of JEBAR, the joint effect of baroclinicity and relief, in large-scale ocean dynamics is critically analyzed. The authors address two questions. Does the JEBAR term properly characterize the joint impact of stratification and bottom topography on the ocean circulation? Do estimates of the JEBAR term from observational data allow reliable diagnostic calculations? The authors give a negative answer to the first question. The JEBAR term need not give a true measure of the effect of bottom relief in a stratified ocean. A simple two-layer model provides examples. As to the second question, it is demonstrated …
Number 36 (March 1998), Southern Fishes Council
Number 36 (March 1998), Southern Fishes Council
Southeastern Fishes Council Proceedings
(March 1998) - Distribution and habitat affinities of the blackmouth shiner (Notropis melanostomus) in Mississippi, including eight newly discovered localities in the Upper Pascagoula River Drainage. By Martin T. O'Connell, Stephen T. Ross, John A. Ewing III and William T. Slack
The bluebarred pygmy sunfish (Elassoma okatie) in Georgia. By Jan Jeffrey Hoover, Steven G. George and Neil H. Douglas
Minutes, Business Meeting, 23rd Annual Meeting, Southeastern Fishes Council
Regional Southeastern Fishes Council Reports
Front Matter, Southeastern Fishes Council
Front Matter, Southeastern Fishes Council
Southeastern Fishes Council Proceedings
No abstract provided.
Minutes, Business Meeting, Southeastern Fishes Council
Minutes, Business Meeting, Southeastern Fishes Council
Southeastern Fishes Council Proceedings
No abstract provided.
Distribution And Habitat Affinities Of The Blackmouth Shiner (Notropis Melanostomus) In Mississippi, Including Eight Newly Discovered Localities In The Upper Pascagoula River Drainage, Martin T. O'Connell, Stephen T. Ross, John A. Ewing Iii, William T. Slack
Distribution And Habitat Affinities Of The Blackmouth Shiner (Notropis Melanostomus) In Mississippi, Including Eight Newly Discovered Localities In The Upper Pascagoula River Drainage, Martin T. O'Connell, Stephen T. Ross, John A. Ewing Iii, William T. Slack
Southeastern Fishes Council Proceedings
No abstract provided.
The Bluebarred Pygmy Sunfish (Elassoma Okatie) In Georgia, Jan Jeffrey Hoover, Steven G. George, Neil H. Douglas
The Bluebarred Pygmy Sunfish (Elassoma Okatie) In Georgia, Jan Jeffrey Hoover, Steven G. George, Neil H. Douglas
Southeastern Fishes Council Proceedings
No abstract provided.
Regional Southeastern Fishes Council Reports, Southeastern Fishes Council
Regional Southeastern Fishes Council Reports, Southeastern Fishes Council
Southeastern Fishes Council Proceedings
No abstract provided.
Ventilation Behavior Of The Mantis Shrimp, Hemisquilla Ensigera Californiensis In Hypoxic Burrows, Tamara L. Richter
Ventilation Behavior Of The Mantis Shrimp, Hemisquilla Ensigera Californiensis In Hypoxic Burrows, Tamara L. Richter
Loma Linda University Electronic Theses, Dissertations & Projects
The burrow-dwelling mantis shrimp, Hemisquilla ensigera californiensis, is an environmentally challenged marine species due to the fact it inhabits burrows located beneath the surface of the sediment where oxygen pressure is low and easily depleted. This experiment revealed that burrow oxygen pressure (pO2) is frequently hypoxic and can become anoxic. Average pO2 within the burrow is between 40-50 mm Hg and may drop below 10 mm Hg even if the burrow isn't capped. When capped, p02 rapidly drops to 0 mm Hg within two hours. Low pO2 does not result in decreased animal activity, …
Rde Model: A Program For Simulating Water Wave Transformation For Harbor Planning, Jerome P.Y. Maa, T. W. Hsu, H. H. Hwung
Rde Model: A Program For Simulating Water Wave Transformation For Harbor Planning, Jerome P.Y. Maa, T. W. Hsu, H. H. Hwung
Reports
No abstract provided.
Aquaculture In Dagupan City, Philippines, Michael A. Rice, Arthur Z. Devera
Aquaculture In Dagupan City, Philippines, Michael A. Rice, Arthur Z. Devera
Michael A Rice
The development of aquaculture in the Agno-Pantal-Calmay River Estuary system of Dagupan City, Pangasinan Province in the Philippines is reviewed. Traditionally, extensive pond culture of milkfish, Chanos chanos and penaeid shrimp was practiced along with culture of mangrove oysters, Crassostrea iredalei, in adjacent estuarine waterways. Netpen culture of serranid groupers in the estuaries began in the early 1980s, followed by intensive fish pen culture of milkfish in the late 1980s. Over intensification of finfish aquaculture led to hyper eutrophication and fish kills beginning in 1996. Official governmental response to the fish kills is reported, and recommendations to prevent future fish …
Observations Of Meridional Scale Frequency Dependence In The Coupled Tropical Ocean-Atmosphere System, Chunzai Z. Wang, Robert H. Weisberg
Observations Of Meridional Scale Frequency Dependence In The Coupled Tropical Ocean-Atmosphere System, Chunzai Z. Wang, Robert H. Weisberg
Marine Science Faculty Publications
It is generally observed in models of the coupled tropical ocean‐atmosphere system that the meridional scales for oscillations at interannual periods are larger than an oceanic equatorial Rossby radius of deformation. Using 9 years of the high‐resolution optimum interpolation sea surface temperature (SST) product of the National Oceanic and Atmospheric Administration (NOAA)/National Centers for Environmental Prediction (NCEP), analyses are made on the frequency dependence of the observed meridional scales, with emphasis on the latitudinal structures in the central Pacific at 140°W. On the relatively short intraseasonal and seasonal timescales the SST variations are found to occur over a meridional scale …
Tropical Instability Wave Energetics: Observations From The Tropical Instability Wave Experiment, L. Qiao, Robert H. Weisberg
Tropical Instability Wave Energetics: Observations From The Tropical Instability Wave Experiment, L. Qiao, Robert H. Weisberg
Marine Science Faculty Publications
Ocean velocity data from an array of subsurface moorings deployed from May 1990 to June 1991 during the Tropical Instability Wave Experiment are used to study the energetics of planetary waves in the vicinity of the equator at 140 degrees W. Such waves, observed from August to December 1990, were initiated by barotropic instability arising primarily from the cyclonic shear region of the South Equatorial Current and Equatorial Undercurrent just north of the equator. Subsequently, local barotropic production continued to maintain and modulate these tropical instability waves through a combination of cyclonic shear and meridional velocity component divergence just north …
Strata Formation On Margins (Strataform) S-60 And S-70 Sites Benthic Boundary Layer Tripod Data Report, December 1995 - March 1996, L. D. Wright, D. A. Hepworth, S. C. Kim, R. A. Gammisch
Strata Formation On Margins (Strataform) S-60 And S-70 Sites Benthic Boundary Layer Tripod Data Report, December 1995 - March 1996, L. D. Wright, D. A. Hepworth, S. C. Kim, R. A. Gammisch
Reports
No abstract provided.
1997 Annual Awards, Virginia Institute Of Marine Science
1997 Annual Awards, Virginia Institute Of Marine Science
Miscellaneous
The Annual Awards ceremony is an occasion in which new employees and volunteers are introduced, employee service is recognized and student and faculty awards are presented.
Understanding The Success And Failure Of Oyster Populations: The Importance Of Sampled Variables And Sample Timing, Thomas M. Soniat, Eric N. Powell, Eileen E. Hofmann, John M. Klinck
Understanding The Success And Failure Of Oyster Populations: The Importance Of Sampled Variables And Sample Timing, Thomas M. Soniat, Eric N. Powell, Eileen E. Hofmann, John M. Klinck
CCPO Publications
One of the primary obstacles to understanding why some oyster populations are successful and others are not is the complex interaction of environmental variables with oyster physiology and with such population variables as the rates of recruitment and juvenile mortality. A numerical model is useful in investigating how population structure originates out of this complexity. We have monitored a suite of environmental conditions over an environmental gradient to document the importance of short time-scale variations in such variables as food supply, turbidity, and salinity. Then, using a coupled oyster disease population dynamics model, we examine the need for short rime-scale …
Sidescan Sonar Image, Surficial Geological Interpretation, And Bathymetry Of The Long Island Sound Sea Floor Off Milford, Connecticut, Roman Zajac, David C. Twichell, Larry J. Poppe, Ralph S. Lewis, Veeann Cross
Sidescan Sonar Image, Surficial Geological Interpretation, And Bathymetry Of The Long Island Sound Sea Floor Off Milford, Connecticut, Roman Zajac, David C. Twichell, Larry J. Poppe, Ralph S. Lewis, Veeann Cross
Biology and Environmental Science Faculty Publications
The surficial geology of a 6-km X 8-km section of the western part of Long Island Sound has been mapped. The map area is 4 to 12 km south of the mouth of the Housatonic River in 14 to 40 m water depth (see location map). This study is part of an interdisciplinary program to define the surficial geology and benthic habitats in Long Island Sound and to see how they are changing with time, and includes, in addition to this map area, the other survey areas shown on the location map. The U.S. Geological Survey, in cooperation with the …
Virginia Institute Of Marine Science Programs And Services, Virginia Institute Of Marine Science
Virginia Institute Of Marine Science Programs And Services, Virginia Institute Of Marine Science
Miscellaneous
Programs and faculty, education and Institute support resources are described.
Sea Turtle Conservation Program, Broward County, Fl 1998 Report, Curtis M. Burney, William E. Margolis
Sea Turtle Conservation Program, Broward County, Fl 1998 Report, Curtis M. Burney, William E. Margolis
Marine & Environmental Sciences Faculty Reports
No abstract provided.
The Extent And Condition Of Us Coral Reefs, Steven Miller, Steven Miller, Michael Crosby
The Extent And Condition Of Us Coral Reefs, Steven Miller, Steven Miller, Michael Crosby
Marine & Environmental Sciences Faculty Reports
No abstract provided.