Physical Sciences and Mathematics Commons^™

Oyster Spatfall In Virginia Rivers: 1985 Annual Survey, James Whitcomb

Reports

The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made on oyster shells strung qn wire and suspended from stakes on public and private beds. The number of spat on shells is counted each week of the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur.

Baltimore Harbor And Channels Aquatic Benthos Investigations : Final Technical Report, Robert J. Diaz, Linda C. Schaffner, Robert J. Byrne, Robert A. Gammisch

Reports

This report describes work performed by the Virginia Institute of Marine Science, School of Marine Science of the College of William and Mary, Gloucester Point, VA, to document the existing preoperational conditions at four locations in the Chesapeake Bay selected as possible dredged material disposal areas for the deepening of the Baltimore Channel. The work was sponsored by the Baltimore District Corps of Engineers.

The objectives of this work were at each of the four potential disposal sites:

1 -document the surface (0-15 em) sediment conditions spatially and temporally

2 - document macrobenthic communities spatially and temporally.

3 - empty …

Present And Historical Environmental Survey Of The Poquoson River, York County, Virginia And The Warwick River; Newport News, Virginia : With Special Reference To Biotic Communities And The Effects Of Alum Discharge, Robert J. Diaz, Morris H. Roberts Jr., Gene M. Silberhorn, Gary F. Anderson

Reports

The objectives of this study were:

1. to determine the areal extent of discharged materials within each of the rivers using the aluminum:silicon ratio as an indicator;

2. to evaluate the benthic invertebrate communities within each of the rivers;

3. to determine whether there are differences in the productivity of the benthic algal and planktonic communities which can be attributed to the discharge of alum sludge in each river;

4. to evaluate the condition of the marsh communities in each river near the filtration plant;

5. to review historical biological data for the Poquoson and Warwick Rivers and to relate …

Energy Utilization Model For Silver Perch, Bairdiella Chrysoura (Bioenergetics, Sciaenidae, Growth, Eelgrass, Chesapeake Bay), Hugh Anthony Brooks

Dissertations, Theses, and Masters Projects

An energetics model was constructed as an alternative method to length frequency analysis for the estimation of growth for juvenile silver perch, Bairdiella chrysoura. The model approach was adopted since estimation of juvenile estuarine fish growth by only collecting length or weight frequency data is difficult due to the large bodies of water and variety of microhabitats that must be regularly sampled over short time intervals. Field and laboratory data was included in analysis of model compartments for growth, metabolism, food intake and energy loss in waste products. Food habit studies indicated that silver perch is a planktivore that feeds …

Monogeneans From The Southern Pacific Ocean: Polyopisthocotyleids From The Australian Fishes, The Subfamily Microcotylinae, W. A. Dillon, William J. Hargis Jr., Antonio E. Harrises

Reports

This seventh in a series of monogenetic trematodes from the Southern Pacific Ocean discusses nine species of Monogenea from Australian waters. Redescriptions are given for Microcotyle arripis Sandars, 1945, M. bassensis Murray, 1931, M. helotes Sandars, 1944, M. nemadactylus Dillon and Hargis, 1965, M. neozealanicus Dillon and Hargis, 1965, M. odacis Sandars, 1945, M. pentapodi Sandars, 1944, and M. temnodontis Sandars, 1945. New locality records are reported for all of the above. New host records are established for Microcotyle bassensis Murray, 1931 and M. neozealanicus Dillon and Hargis, 1965. Microtyle sp. from the gills of Acanthopagrus australis (Gunther) is reported.

A Bioeconomic Model Of The Middle Atlantic Surf Clam (Spisula Solidissima) Fishery, Thomas M. Armitage

Dissertations, Theses, and Masters Projects

A bioeconomic simulation model of the middle Atlantic surf clam (Spisula solidissima) fishery has been developed from a survey of biological and econometric relationships. While identifying the biological input parameters available in the literature, the economic submodel of the fishery has been developed with price and landings time series data, and with data obtained through the use of survey questionnaires and interviews with surf clam fishermen and processors. Alternative management scenarios in the fishery have been evaluated from industry costs in both the harvesting and processing sectors and analysis of the demand for raw product confronting surf clam fishermen. Multiple …

Comparison Of Daily Growth Rates Of The Mummichog, Fundulus Heteroclitus In Habitats Of Different Salinity Regimes, James G. Hoff

Dissertations, Theses, and Masters Projects

No abstract provided.

Abundance, Seasonality And Community Structure Of Fishes On The Mid-Atlantic Bight Continental Shelf, James Alden Colvocoresses

Dissertations, Theses, and Masters Projects

Cluster analyses of seasonal (spring and fall) National Marine Fisheries Service Groundfish Survey bottom trawl catches on the Middle Atlantic Bight continental shelf revealed consistent species associations and faunal zones over a nine year period during. Boundaries between faunal zones tended to follow isotherms on the inner portions of the shelf and isobaths along the outer shelf. During the late winter/early spring, four faunal zones were identified: a northern inner and middle shelf zone extending from Cape Cod southward to about Delaware Bay, a northern middle and outer shelf zone offshore of the first zone, a southern middle and outer …

A Systematic Revision Of The South American Freshwater Stingrays (Chondrichthyes: Potamotrygonidae) (Batoidei, Myliobatiformes, Phylogeny, Biogeography), Ricardo De Souza Rosa

Dissertations, Theses, and Masters Projects

Three genera are recognized in the family Potamotrygonidae of neotropical freshwater stingrays: Potamotrygon, Paratrygon, and Plesiotrygon, the latter being described as a new genus. Potamotrygon is polytypic, and both Paratrygon and Plesiotrygon are monotypic, as far as known. The family name Potamotrygonidae has priority over Paratrygonidae Gill. Nineteen previously described species of Potamotrygonidae are recognized: Paratrygon aiereba, Potamotrygon brachyura, P. castexi, P. constellata, P. dumerilii, P. falkneri, P. henlei, P. histrix, P. humerosa, P. leopoldi, P. magdalenae, P. motoro, P. ocellata, P. orbignyi, P. schroederi, P. schuemacheri, P. scobina, P. signata, and P. yepezi. One additional specific name is established …

Monogeneans From The Southern Pacific Ocean, Polyopisthocotyleids From The Australian Fishes, The Subfamily Polylabrinae And Microcotylinae, W. A. Dillon, William J. Hargis Jr., Antonio E. Harrises

Reports

This sixth of a series on monogenetic trematodes from the Southern Pacific Ocean discusses five species of Monogenea from Australian waters. Polylabris carnivonensis n. sp., from the gills of Leiognathus fasciatus, and Polylabris sigani no. sp., from the gills of Siganus ormin, are described. Polylabris sillaginae (Woolcock, 1936) n. comb and Gonoplasius carangis Sandars, 1944 are redescribed. In order that comparisons can be made between Australian and New Zealand populations, Kahawaia truttae (Dillon and Hargis, 1965) Lebedev, 1969 is briefly I described.

Oyster Spatfall In Virginia Rivers: 1984 Annual Summary, James Whitcomb

Reports

The Virginia Institute of Marine Science (VIMS) conducts weekly surveys from June through early October to obtain oyster spatfall information. Spat counts are made on oyster shells strung on wire and suspended from stakes on public and private beds. The number of spat on shells is counted each week of the spawning season to determine the potential of a particular area for receiving a strike and to predict the most likely period the strikes will occur.

Community Structure Of Demersal Fishes On The Inshore U.S. Atlantic Continental Shelf: Cape Ann, Ma. To Cape Fear, N.C. (United States, Cluster Analysis, Massachusetts, North Carolina), William C. Phoel

Dissertations, Theses, and Masters Projects

Numerical classification analyses (clustering) of spring, summer and fall National Marine Fisheries Service bottom trawl catches on the inshore continental shelf between Cape Ann, Ma. and Cape Fear, N.C., showed consistent species associations and faunal zones over a three year period. Analysis of a data set created by combining all nine survey cruises also produced consistent species associations, however sites clustered by seasons as well as by geographic area. The three faunal provinces of the U.S. east coast (Gulf of Maine, Middle Atlantic Bight and South Atlantic Bight) were represented in the study area, as were the seasonal faunal barriers …

Macrobenthic Community Structure At The Entrance To The Chesapeake Bay, Roberto Javier Llansa

Dissertations, Theses, and Masters Projects

No abstract provided.

Seasonal Immune Response In Juvenile Summer Flounder Paralichthys Dentatus To The Hemoflagellate Trypanoplasma Bullocki In The Lower Chesapeake Bay, Linda Jane Frizzell

Dissertations, Theses, and Masters Projects

No abstract provided.

Achievements Of Soviet Scientists In Investigations Of The Helminthofauna Of Marine Animals Of The World Ocean, S. L. Delamure, A. S. Skriabin

Reports

During the last 40 yr (1940 to 1980), Soviet helminthologists have examined about 9,680 specimens of marine mammals In the Northern and Southern Hemispheres, using uniform or standard methods In most cases. As a result, 20 new species of trematodes [digeneids], 19 cestodes, 9 acanthocephalans, and 23 nematodes have been described. Also several new supraspecific taxa have been established. Systematic revisions of Campuidae, Tetrabothriidae, Pseudallidae, and Anisakidae have been undertaken. The morphology, adaptation of helminths to their environments and to the host's mode of life, Infection rates and characteristics, and the seasonal and age dynamics of the helmlnthofauna have been …