Life Sciences Commons^™

Biology And Management Of River Herring And Shad In Virginia : Annual Report, Anadromous Fish Project 1975, Walter J. Hoagman, William H. Kriete

Reports

The number of pound nets and the catch of· alosines per net continued to decline in 1975. Effort by sta.ke gill nets.· increased but catch estimates declined. The James River · yielded an estimated 853,847 pounds of American shad (down 47% from 1974) with the peak of the run at the end of March. Stake gill nets landed 246,036. pounds of American shad in the York River, a decrease from 1974. Estimates of Hickory shad landings declined 83% in the York River. Pound nets in the Rappahannock River had a 75% reduction in American shad catch and stake gill net …

City Of Hampton Tidal Marsh Inventory, Thomas A. Barnard, Gene M. Silberhorn

Reports

No abstract provided.

Hydrography And Hydrodynamics Of Virginia Estuaries Viii: Mathematical Model Studies Of Water Quality Of The York River System, P. V. Hyer, A. Y. Kuo, C. S. Fang, William J. Hargis Jr.

Reports

No abstract provided.

Hydrography And Hydrodynamics Of Virginia Estuaries Vi: Mathematical Model Studies Of Water Quality Of The Rappahannock Estuary, A. Y. Kuo, A. Rosenbaum, P. V. Hyer, C. S. Fang

Reports

No abstract provided.

Vepco Surry Power Plant Study, River Biota And Phytoplankton Entrainment Sections : Progress Report July 1975, R. Jordan, R. Carpenter, C. Becker, M Ho

Reports

This report summarizes the biological data collected from January through June 1975 in the river and phytoplankton entrainment portions of the VEPCO Surry Power Plant Study. The sampling program conducted during this period in the Hog Island area of the James River consisted of an expanded version of a study initiated in May 1969 to monitor certain aquatic communities that could be affected by the operation of the power plant. The river phytoplankton, zooplankton, benthos and fouling organism communities have been included in the past and present study designs. The phytoplankton entrainment substudy was begun in April 1975 with the …

Bathymetric Chart Comparisons: A Manual Of Methodology, Error Criteria, And Applications, A. H. Sallenger, V. Goldsmith, C. H. Sutton

Reports

No abstract provided.

An Assessment Of Estuarine And Nearshore Marine Environments, M. P. Lynch, B. L. Laird, N. B. Theberge, J. C. Jones

Reports

No abstract provided.

The Chesapeake Bay: A Study Of Present And Furture Water Quality And Its Ecological Effects Volume I: Analysis And Projection Of Water Quality, A. Y. Kuo, Arlene Rosenbaum, John P. Jacobson, C. S. Fang

Reports

This study, prepared for the National Commission on Water Quality, is an analysis of the present and future water quality in the Chesapeake Bay from the Susquehanna River at Conowingo, Md. to the Atlantic Ocean. The objectives addressed in this volume of the study are 1.) Description of the present conditions of water quality and water quantity with respect to temperature, salinity, nutrients and dissolved oxygen. and 2.) Projection of future water quality conditions associated with the achievement of require ments and goals of the Federal Water Pollution Control Act Amendments of 1972, P.L. 92-500, 86 Stat. 816. The assessment …

The Chesapeake Bay: A Study Of Present And Future Water Quality And Its Ecological Effects Volume Ii: Analysis And Projection Of Ecological Conditions, Morris H. Roberts Jr., Donald F. Boesch, Michael E. Bender

Reports

No abstract provided.

Thermal Effects Of The Surry Nuclear Power Plant On The James River, Virginia Part V: Results Of Monitoring Physical Parameters During The First Two Years Of Operation, G. C. Parker, C. S. Fang

Reports

No abstract provided.

A Water Quality Study Of The Elizabeth River: The Effects Of The Army Base And Lambert Point Stp Effluents, Bruce J. Neilson

Reports

No abstract provided.

Yorktown Power Station Ecological Study, Phase Ii : Final Technical Report, R. A. Jordan, R. W. Virnstein, J. E. Illowsky, J. Colvocoresses

Reports

No abstract provided.

Prince William County Tidal Marsh Inventory, Kenneth A. Moore, Gene M. Silberhorn

Reports

No abstract provided.

Discoloration In Rock Crabs: What To Do About It, W. A. Vanengel, P. A. Haefner Jr.

Reports

No abstract provided.

Stafford County Tidal Marsh Inventory, Kenneth A. Moore, Gene M. Silberhorn

Reports

No abstract provided.

Newport News Point Circulation Study, Bruce J. Neilson

Reports

No abstract provided.

Final Report On Effects Of Low Oxygen Tensions And High Levels Of Hydrogen Sulfide On Benthic Marine Animals, Dexter S. Haven, Robert E. Bendl

Reports

This study investigated effects of low levels of dissolved oxygen (D .O.) and low levels of D.O. in combination with hydrogen sulfide (H2S) on the larvae and adults of oysters Crassostra virginica and on adults of hard clams Mercenaria mercenaria. The purpose of this study was to investigate how low D.O. and low D. O. plus H2S, which might be associated with discharges from sewerage treatment plants, could adversely influence populations of molluscs .

Biology And Management Of River Herring And Shad In Virginia : Annual Report, Anadromous Fish Project 1974, Walter J. Hoagman, John V. Merriner, William K. Kriete, Woodrow L. Wilson

Reports

This annual report covers the period October, .1973 through September, 1974. It is the seventh report generated by' the project, with 3-year completion reports prepared in 1970 and 1973. The project· is continuing at VIMS and each year allows stronger conclusions to be made concerning trends in the basic population parameters studied.

The 1970-1973 completion report was widely distributed in Virginia, libraries at fishery science institutes, and throughout the National Marine Fisheries Service. The completion report analyzed data from the entire history of the project. In many cases the entire summarized data core for a particular segment was presented, e.g. …

Northumberland County Tidal Marsh Inventory, Gene M. Silberhorn

Reports

No abstract provided.

An Investigation Into The History And Ownership Of Starling's Island, N. Bartlett Theberge

Reports

No abstract provided.

Remote Sensing Of Submerged Aquatic Vegetation In The Lower Chesapeake Bay : Final Report To National Aeronautical And Space Administration Langley Research Center, Robert J. Orth, Hayden H. Gordon

Reports

Kodak's experimental water penetration film and black and white near infrared film were used to study the distribution of submerged aquatic vegetation in the lower Chesapeake Bay. The water penetration film was very useful in this study compared to the black and white N1R. Optimal results from this film were obtained with the camera aperture closed 1/2 stop from suggested settings. Detailed description of the grass beds were obtained by flying at an altitude of 5,000 feet, at low tide when wind conditions were minimal.

There was a 36% reduction in the amount of submerged aquatic vegetation in the lower …

Studies For A Proposed Nansemond River Sewage Treatment Plant, Virginia Institute Of Marine Science

Reports

• Vol. 1: Summary and conclusion/ C.S Fang and Bruce Neilson.
• Vol. 2: An analysis of currents and circulation in Hampton Roads, Virginia / Bruce Neilson and Mark Boulé; Description of non-tidal flows / Maynard Nichols.
• Vol. 3: Water quality monitoring of Hampton Roads and the Nansemond River, Summer 1974 / Bruce Neilson ... [et al.]
• Vol. 4. : A survey of commercial shellfish in the vicinity of Newport News Point and Pig Point in the lower James River / Dexter Haven and Paul Kendall
• Vol. 5: A model for predicting the pollutant distribution from an outfall in a tidal estuary …

An Investigation, Testing And Modifying Of Gear To Harvest Oysters And Shell : Final Contract Report For The Period 1 July, 1973 Through 30 June, 1975, Dexter S. Haven, James P. Whitcomb

Reports

During the 1974-75 contract period the hydraulic escalator was modified and tested in the York and Rappahannock Rive r s . The tests showed that the harvester was capable of raising large quantities of oysters from various types of bottoms. Moreover, these oysters were not broken or crushed, were free .of silt or grit , and t he apparatus caused only minima l damage to the bottom . The modification were made from January to April and field testing began in May 1975 in t he York and Rappahannock Rivers on public and leased bottom and on several types of …

Usable Meat Yields In The Virginia Surf Clam Fishery, Joseph G. Loesch

VIMS Articles

The weight of surf clam meat landed in Virginia is estimated by the National Marine Fisheries Service, Division of Statistics and Market News (DSMN) by multiplying bushels landed by a constant of 17 lb (7. 71 kg) of total meat per bushel. However, total meat weight includes the viscera, a portion of clam not utilized by the industry. Herein is an analysis of the yield of useable surf clam meat weight per bushel and seasonal variability in meat weight relative to seawater temperature for Virginia stocks

Distribution And Relative Abundance Of 7 Species Of Skates (Pisces-Rajidae) Which Occur Between Nova-Scotia And Cape-Hatteras, John D. Mceachran, John A. Musick

VIMS Articles

No abstract provided.

Fine-Structure Of Minchinia Sp (Haplosporida) Sporulation In Mud Crab, Panopeus-Herbstii, Frank O. Perkins

VIMS Articles

Morphogenetic changes which accompany sporulation of Minchinia sp. in the mud crab (Panopeus herbstii) are described. Small (4-19 /-1m diameter) plasmodia, the precursor cells for the sporulation sequence, increase in size and numbers of nuclei per cell to form sporonts with a delimiting wall. Since widely divergent nuclear sizes (2.3-5.9 /-1m diameter) and paired small nuclei < 3 /-1m diameter) were observed in sporonts, it is suggested that karyogamy occurs followed by meiosis. Evidence for meiosis is the observation of synaptonemal-like complexes and polycomplex-like structures in sporont nuclei. Sporonts cleave into uninucleate sporoblasts following one of two pathways. In the presumably "normal" sequence, a cytoplasmic syncytium is formed followed by cleavage into uninucleate sporoblasts. In the other, sporont protoplasm is asynchronously "carved" into uni- or binucleate sporoblasts or sporoplasms as a result of delimitation at the surface and internally. Since aberrant spore formation was commonly observed in the latter type of sporont, its cleavage patterns are considered to be anomalous. A sporoplasm is then delimited in each sporoblast and spore maturation follows. Haplosporosomes were observed in plasmodia and spores, but not in intermediate cell stages. Mitotic apparati appear to be persistent through interphase in plasmodia and sporonts and consist of two spindle pole bodies connected by a bundle of micro tubules.

Culture Of The Bay Scallop, Argopecten Irradians, In Virginia, Michael Castagna

VIMS Articles

In recent years there has been increased interest in the development of marine aquaculture or mariculture. Techniques for growing many traditional species. such as oysters and quahogs. have been developed, and considerable effort has also been made to test the feasibility of culturing new . less traditional species (Loosanoff and Davis,1963 : Iversen. 1968; McNeil, 1970; Price and Maurer, 1971: and Milne ,1972). This paper reviews the natural history of the bay scallop. Argopecten irradians Lamarck, and presents a review of the Virginia Institute of Marine Science's (VIMS) continuing research on this species which began in 1968.

Occurrence Of Elvers Of Synaphobranchus-Affinis On Continental Slope Off North-Carolina, Charles A. Wenner

VIMS Articles

No abstract provided.

King George County Tidal Marsh Inventory, Kenneth A. Moore, Gene M. Silberhorn

Reports

No abstract provided.

Two New Species Of Sciaenid Fishes (Tribe-Sciaenini) From Caribbean Sea And Adjacent Waters, Ln Chao, Rv Miller

VIMS Articles

The genus Sciaena , heretofore monotypic, is characterized by the lack of mental barbels and an elongate swimbladder with no appendages. Two new species S. trewavasae and S. bathytatos are described herein. The new species differ from S. umbra, the type species of the genus, and from one another in the following characters: S. umbra has 11 + 14 vertebrae, 15-20 gill rakers, 23-26 soft dorsal rays, 9-13 inner gill rakers; S. trewavasae has 10 + 15 vertebrae, 19-21 gill rakers, 24-26 soft dorsal rays, 13-16 inner gill rakers; S. baillylalos has 11 + 14 vertebrae, 22-27 gill rakers, 21-23 …