Life Sciences Commons^™

Front Matter, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.

Number 28 (December 1993), Southern Fishes Council

Southeastern Fishes Council Proceedings

(December 1993) - Notes on the Habitat Characteristics of the Backwater Darter, Etheostoma zonifera (Hubbs and Cannon). By M.S. Peterson, 7 pp.

Minutes, Regional Reports and News Notes.

Notes On The Habitat Characteristics Of The Backwater Darter, Etheostoma Zonifera (Hubbs And Cannon), Mark S. Peterson

Southeastern Fishes Council Proceedings

No abstract provided.

Business Meeting Minutes, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.

Regional Sfc Reports, Southeastern Fishes Council

Southeastern Fishes Council Proceedings

No abstract provided.

Compositional And Taphonomic Variations In Modern Crinoid-Rich Sediments From The Deep-Water Margin Of A Carbonate Bank, Ghislaine Llewellyn, Charles G. Messing

Marine & Environmental Sciences Faculty Articles

Multivariate analyses of the coarse-grained fraction (>2 mm) of sediments accumulating in deep water (419-434 m) along the western margin of the Little Bahama Bank reveal identifiable, small-scale compositional and taphonomic variations among local subhabitats (ridge crest, slope, foreslope, base of slope, pavements and scour pit) separated by meters to tens of meters. Bulk composition varies between planktic-(crest and slope) and lithic-dominated (pavements, scour pit) sediments. Local macrobenthic skeletal components also vary significantly among subhabitats, but are commonly dominated by echinoid and crinoid material; crinoid columnals contribute 9-52% of the coarse skeletal component of 17 sediment samples considered. Distributional …

Degradation Kinetics Of Aromatic Organic Solutes Introduced Into A Heterogeneous Aquifer, Wg Macintyre, M Boggs, Cp Antworth, Tb Stauffer

VIMS Articles

Degradation rates of benzene, p-xylene, naphthalene, and o-dichlorobenzene have been measured in a heterogeneous, unconfined aquifer during a pulse injection experiment at Columbus Air Force Base, Columbus, Mississippi. Dissolved oxygen in the pulse plume maintained aerobic conditions. Degradation kinetics calculated from the complete field data set were approximately first order with the following rate constants: benzene, 0.0070 d-1; p-xylene, 0.0107 d-1; naphthalene, 0.0064 d-1; and o-dichlorobenzene, 0.0046 d-1. Reaction rates were also calculated from a near-field subset of the data using a model based on the hydrologic characteristics of the aquifer. Shapes of the degradation rate curves were consistent with …

Biological And Hydrodynamic Regulation Of The Microbial Food-Web In A Periodically Mixed Estuary, Pm Eldridge, Me Sieracki

VIMS Articles

Abundances of chroococcoid cyanobacteria and heterotrophic bacteria in surface waters of the York River subestuary covary with spring-neap tidally induced changes in the mixed-layer depth. Abundances of their principal grazers, heterotrophic protists, however, do not oscillate. A simulation model of this system using nonlinear, density-dependent functions has been developed to replicate cycles observed in the two bacterial abundances and simulate bacterial production and protistan grazing. A Jassby-Plan equation is used to determine growth rate from the mean mixed-layer light and empirically derived growth and a parameters. Changes in mixed-layer depth regulate light availability, thereby controlling cyanobacterial growth rates. The model …

Ribulose-Bisphosphate Carboxylase Gene Expression In Subtropical Marine Phytoplankton Populations, Scott L. Pichard, Marc E. Frischer, John H Paul

Marine Science Faculty Publications

Oceanic phytoplankton are known to fix CO2 primarily through the action of the enzyme ribulose-1,5-bisphosphate carboxylase (RuBPCase). The amino acid and nucleotide sequence of the large subunit of this enzyme have been conserved across the evolution of the chlorophytic plants (from cyanobacteria to higher plants via green algae) with approximately 80 and 70 % homology at the amino acid and nucleotide levels respectively. To understand the molecular regulation of this enzyme in phytoplankton, we have measured levels of the RuBPCase large subunit (rbcL) mRNA and DNA, in combination with rates of photosynthetic CO2 fixation, autofluorescent cell counts, and chlorophyll a …

Proceedings Of The Charter Boat Management Workshop Held As Part Of The First National Fisheries Manager Conference Terrigal Nsw 21 September 1993, A. E. Magee

Fisheries management papers

General concern of all states was the actual AND potential impact of charter fishing on the resource and the inability to measure such impacts. The perceived problem with dual licensing was unregulated effort and the abilit to circumvent management controls. This paper provides current charter boat management arrangements in Australia, why they should be managed, types of charter vessels, Licensing, Management of recreational only charter vessels, Non-consumptive charters, Management guides and small scale charter operators, Commonwealth jurisdiction, Development of agreed strategies and Identification of future needs.

Port Everglades Macroinvertebrate Monitoring: Monitoring Of Benthic Macroinvertebrate Assemblages At The Southport Turning Basin And Adjacent Areas Of John U. Lloyd State Recreation Area: January 1993: Final Version, Charles G. Messing, Richard E. Dodge

Marine & Environmental Sciences Faculty Reports

This report documents the January 1993 monitoring of benthic macroinvertebrate assemblages in the Port Everglades Southport turning basin vicinity and adjacent areas of John U. Lloyd State Recreation Area. This is the fourth monitoring effort of the series carried out by Nova University Oceanographic Center. Sampling was carried out during 4-15 January and 1-22 February 1993, the extended period due chiefly to weather and tidal constraints. Comparison with results of preceding survey efforts will be included in the annual report following the August 1993 survey. The section treating the Ponar grab samples is now complete: identifications of the remaining groups …

A Description Of Coads Surface Meteorological Fields And The Implied Sverdrup Transports For The Atlantic Ocean From 30°S To 60°N, Dennis A. Mayer, Robert H. Weisberg

Marine Science Faculty Publications

Using COADS data spanning 1947-1988, we describe the regional nature of the Atlantic Ocean wind-driven circulation between 30-degrees-S and 60-degrees-N and its annual and interannual variability. The Sverdrup streamfunction defines the circulation gyres. Our focus is on three central gyres: the Northern Hemisphere anticyclonic subtropical gyre, the cyclonic tropical gyre just north of the equator, and the clockwise equatorial gyre straddling the equator. This rendition of the Sverdrup streamfunction, computed with constant drag coefficient and air density, compares favorably with that from other climatologies. In the Straits of Florida, analyses suggest that differences between the annual cycle in Sverdrup transport …

Description, Distribution, And Abundance Of The Blue Crab, Callinectes Sapidus (Rathbun), Spawning Stock Of The Lower Chesapeake Bay, Patrick John Geer

OES Theses and Dissertations

The lower Chesapeake Bay spawning stock of the blue crab, Callinectes sapidus, (Rathbun), is examined for seven years (1986 - 1992) in an attempt to better understand stock behavior. Three methods of post-stratification are used to describe the distribution and movement of the population over time. The three methods, density strata, geographic zones, and depth strata, did well in explaining movements of the population, indicating a trend of increased concentration of blue crabs near the eastern Bay late in the spawning season - October. The data suggest a bimodal period of spawning and a trimodal period of abundance. The …

Sediment-Water Nutrient Exhange In Estuarine Sediments Of Differing Trophic Status, Richard L. Wetzel, Susan K. Dailey, Gregory J. Lackey, Betty E. Berry

Reports

No abstract provided.

Trends In Shark Abundance From 1974 To 1991 For The Chesapeake Bight Region Of The U.S. Mid-Atlantic Coast, John A. Musick, Steven Branstetter, James A. Colvocoresses

VIMS Books and Book Chapters

Recent stock assessments indicate that the shark stock of the western North Atlantic is exploited at a rate twice the maximum sustainable yield. This finding is supported by data generated by the Virginia Institute of Marine Science longline program for sharks of the. Chesapeake Bay and adjacent coastal waters. Trends in catch per unit of effort since 1974 indicate 60-80% reductions in population size for the common species - sandbar (Carcharhinus plumbeus) , dusky (C. obscurus) , sand tiger (Odontaspis taurus), and tiger (Galeocerdo cuvier) sharks. Declines include numbers of individuals for all species, size classes within species, and in …

Second Post-Construction Report: 1992 Biological Monitoring Of The Hollywood-Hallandale Beach Renourishment. Draft, Richard E. Dodge, Walter Goldberg, Steven C. Hess, Charles G. Messing

Marine & Environmental Sciences Faculty Reports

In 1990. Nova University (Contractor) with Coral Reef Associates and ERM South (Subcontractors) was awarded a contract to provide biological monitoring services for the Hollywood Hallandale Beach Renourishment Project. A notice to proceed for the initial biological monitoring (Pre-construction) was issued in September. 1990. Pre-construction field monitoring took place in October. 1990. Renourishment dredging began in April and ended August, 1991. Approximately 1.2 million cubic yards of sediment were removed and subsequently emplaced on 5 miles of shoreline. The first post-construction monitoring took place in October. 1991. On August 24.1992 the eye of Hurricane Andrew passed some 30 miles to …

Distributions Of Pigments And Primary Production In A Gulf-Stream Meander, Steven E. Lohrenz, John J. Cullen, David A. Phinney, Donald B. Olson, Charles S. Yentsch

Faculty Publications

An investigation was made of physical effects of Gulf Stream meandering on the vertical and horizontal distributions of photosynthetic pigments and primary production. Cruises were conducted in the vicinity of a meander east of 73-degrees-W and north of 37-degrees-N from September 21 to October 5 (leg 1) and October 12-21, 1988 (leg 2), on the R/V Cape Hatteras. Relationships of photosynthesis (normalized to chlorophyll) to irradiance (P-1) did not show large horizontal variation, and water column composite P-I curves from leg 1 and leg 2 were similar. Therefore a single P-I curve derived from pooled data was used to model …

School Of Marine Science Graduate Program 1993-94, College Of William And Mary, School Of Marine Science

Miscellaneous

Catalog for the Graduate program of the School of Marine Science at the College of William and Mary for the listed academic year.

A Modeling Study Of Hypoxia And Eutrophication In The Tidal Rappahannock River, Virginia, Kyeong Park, Albert Y. Kuo, Bruce J. Neilson

Reports

No abstract provided.

Age, Growth, And Mortality Of Atlantic Croaker, Micropogonias Undulatus, In The Chesapeake Bay Region, With A Discussion Of Apparent Geographic Changes In Population Dynamics, Luiz R. Barbieri, Mark E. Chittenden Jr., Cynthia M. Jones

OES Faculty Publications

Atlantic croaker, Micropogonias undulatus, collected from commercial catches in Chesapeake Bay and in Virginia and North Carolina coastal waters during 1988-1991 (n=1,967) were aged from transverse otolith sections. Ages 1-8 were recorded, but eight-year-old fish were rare. Marginal increment analysis showed that for ages 1-7, annuli are formed once a year during the period April-May. Otolith age readings were precise: >99% agreement within and between readers. Observed lengths-at-age were highly variable and growth rate decreased after the first year. Despite the high variability in sizes-at-age, observed lengths for ages 1-7 fit the von Bertalanffy growth model (r2=0.99; n=753) well. …

Viruses, Bacterioplankton, And Phytoplankton In The Southeastern Gulf Of Mexico: Distribution And Contribution To Oceanic Dna Pools, J. Boehme, M. E. Frischer, S. C. Jiang, C. A. Kellogg, S. Pichard, J. B. Rose, C. Steinway, John H. Paul

Marine Science Faculty Publications

Little is known concerning the factors which might control the distribution of viral abundance in oceanic environments and the relationship of viruses to the oceanic DNA pool. We have measured the distribution of viruses, bacterioplankton and phytoplankton in the subtropical southeastern Gulf of Mexico and related these parameters to the distribution of DNA (dissolved and particulate) in these waters. Viral direct counts were 4.6 to 27 x 10(6) ml-1 in Tampa Bay (Florida, USA), 3.8 to 8.5 x 10(5) ml-1 in all oceanic euphotic zone samples and 1.4 to 4.7 x 10(4) ml-1 in deep (200 to 2500 m) waters, …

Variability In Growth And Age Structure Among Populations Of Ribbed Mussels, Geukensia Demissa (Dillwyn) (Bivalvia: Mytilidae), In Jamacia Bay, New York (Gateway Nra), David R. Franz, John Tanacredi Ph.D.

Faculty Works: CERCOM

Growth rates, body weight, density and biomass of ribbed mussels, Geukensia demissa (Dillwyn), were determined at Spartina alterniflora marsh-flat sites in Jamaica Bay, New York (Lower Hudson Estuary). Cumulative growth and annual growth increments varied but rates were lower at sites within the central bay relative to peripheral sites. Local variability both in size at Ring-1 and size-specific annual growth rates probably account for the variability in cumulative length. No pattersn were noted in frequency distributions of shell size but congruence in age structure was observed among neighboring sites in some areas of the bay. Mussel densities were greater within …

Global Climate Change: Sources Of Information And Materials, J. A. Hodges, F. L. Larkin

Reports

No abstract provided.

The Influence Of Temperature Salinity And Postlarval Transport On The Distribution Of Juvenile Spiny Lobsters, Panulirus Argus, In Florida Bay, Jennifer Marie Field

Biological Sciences Theses & Dissertations

Florida Bay is a major nursery for the Caribbean spiny lobster, Panulirus argus. The Bay contains a series of hardbottom or seagrass-covered basins separated by mudbanks, which serve as barriers to water circulation and presumably to transport of postlarvae. Temperatures can fluctuate dramatically in the basins and salinities range from 35 ppt to > 50 ppt. In this study I: i) investigated the physiological tolerance of spiny lobster postlarvae to combinations of temperature and salinity representative of conditions in Florida Bay, and ii) examined how postlarval availability and habitat structure influence spiny lobster recruitment into basins. I measured juvenile lobster …

Seasonal-Variations In Equatorial Atlantic-Ocean Zonal Volume Transport At 28-Degrees-W, T. Y. Tang, Robert H. Weisberg

Marine Science Faculty Publications

Zonal volume transport is examined over the upper 150 m of the water column at 28-degrees-W, using the Seasonal Response of the Equatorial Atlantic experiment moored current meter data at 0.75-degrees-S, 0.0-degrees, and 0.75-degrees-N and a time domain empirical orthogonal function (EOF) analysis to improve spatial and temporal resolution. Gaussian distributions are fit to the mean volume transports per unit width and the fluctuations about these means that are found to be represented by a single EOF mode. The mean volume transport is distributed symmetrically both about the equator and about 75 m depth, with a meridional scale width of …

Convergent And Alternative Designs For Vertebrate Suspension Feeding, S. Laurie Sanderson, Richard Wassersug

Arts & Sciences Book Chapters

In this authoritative three-volume reference work, leading researchers bring together current work to provide a comprehensive analysis of the comparative morphology, development, evolution, and functional biology of the skull.

Comparison Of Predicted And Observed Dioxin Levels In Fish: Implications For Risk Assessment, Judy S. Lakind, Daniel Q. Naiman

RISK: Health, Safety & Environment (1990-2002)

After comparing sampled and modelled dioxin levels in the tissue of fish near pulp and paper mill discharges, the authors argue that, until an improved bioaccumulation model is incorporated into EPA's Risk assessment process, determination of human health Risks associated with consuming dioxin-contaminated fish should be based on sampling.

A Vertical Two-Dimensional Model Of Estuarine Hydrodynamics And Water Quality, Kyeong Park, Albert Y. Kuo

Reports

No abstract provided.

Diet And Feeding Habits Of The Southern Stingray Dasyatis Americana In The Central Bahamas, David S. Gilliam, K. M. Sullivan

Marine & Environmental Sciences Faculty Articles

No abstract provided.

Modeling Nutrient And Plankton Processes In The California Coastal Transition Zone, John Roland Moisan

OES Theses and Dissertations

Two time- and space-dependent, physical-bio-optical models have been developed for the California Coastal Transition Zone (CTZ) region with the overall objective of understanding and quantifying the processes th at contribute to the spatial and temporal development of nutrient and plankton distributions in the CTZ. The first of these models considers only time- and vertical processes at specific locations in the CTZ. The model food web components include: silicate, nitrate, ammonium, two phytoplankton size fractions, copepods, doliolids, euphausiids and a detritus pool. The wavelength dependent attenuation of the subsurface irradiance field, due to sea water, phytoplankton pigment concentrations and dissolved organic …