Life Sciences Commons^™

A Review Of The Fishery Management Plan For Sea Scallops, Placopecten Magellanicus, James E. Kirkley, William D. Dupaul

Reports

No abstract provided.

A Mark-Recapture Study Of Striped Bass In The James River, Virginia : Annual Report 1989, Joseph G. Loesch, Bruce W. Hill

Reports

No abstract provided.

Chesapeake Bay Status Of Stocks Report 1989-1990, Herbert M. Austin, Christopher F. Bonzek, Daniel Scoles, Thomas C. Mosca

Reports

This is the fourth in a series of documents prepared for the Chesapeake Bay Stock Assessment Committee (CBSAC) under the aegis of Status of Stock Knowledge.

A Survey Of Oyster Resources At Glebe Point In The Great Wicomico River, R. A. Blaylock, K. J. Walker, Roger Mann

Reports

This survey of oyster resources associated with leased oyster bottom in the Great Wicomico River in the vicinity of Glebe Point (State Rt. 200) was undertaken by the Virginia Institute of Marine Science (VIMS) at the request of the Virginia Department of Transportation (VDOT). The study was designed specifically to assess the present and potential value of the two oyster leases adjacent to the bridge crossing the Great Wicomico River at Glebe Point.

Habitat Requirements For The Hard Clam, Mercenaria Mercenaria, In Chesapeake Bay, G.Curtis Roegner, Roger L. Mann

Reports

The hard clam, Mercenaria mercenaria, is found along the eastern coast of North America from the Gulf of St. Lawrence to Texas. In Chesapeake Bay the hard clam is restricted to salinities above approximately 12 ppt. The abundances and distribution patterns of hard clams in Chesapeake Bay are based on studies performed nearly 20 years ago - a more extensive survey of hard clam resources is due. Statements concerning long term trends in populations are not feasible.

The basic anatomy of hard clams conform to that of venerid bivalves. Hard clams grow to a maximum shell length (anterior-posterior dimension) of …

A Mark-Recapture Study Of Striped Bass In The Rappahannock River, Virginia Annual Report 1989-1990, Joseph G. Loesch, Bruce W. Hill, Philip W. Sadler

Reports

A total of 6,203 striped bass were tagged in fall 1989 and 2,033 in spring 1990 on the Rappahannock River.

In fall 1989, 63.5% of the tagged striped bass were less than 400 mm fork length (FL). In comparison, 86% of the fish were greater than 400 mm FL in spring 1990.

Pound nets in the Rappahannock River account for 75% of the recaptures, while out of state recaptures account for only 0. 008% of the total returns.

Elimination Of The Meat Count Standard On Sea Scallops, Placopecten Magellanicus: A Preliminary Assessment, James E. Kirkley, William D. Dupaul

Reports

No abstract provided.

A Survey For Oysters And Shell In The Vicinity Of The Proposed Construction Site For A City Of Norfolk Water Line Across The Lafayette River Near The Hampton Boulevard Bridge, Roger Mann, Reinaldo Morales-Alamo

Reports

At the request of the Department of Utilities of the City of Norfolk, the Virginia Institute of Marine Science conducted a survey of the oyster ground in the Lafayette River in the immediate vicinity of the proposed construction site for a 20 11 water line across the river just below the Hampton Blvd. bridge and in front of the Norfolk Yacht and Country Club (Figure 1).

The section of river bottom surveyed was delineated by the Department of Utilities engineers on their site plans. It consisted of a strip across an oyster ground leased by Holland Fisheries. Inc. (Virginia Marine …

Cataract Occurrence In Micropogonia Furnieri (Desmarest, 1822) In The Area Between Capes Frio And Torres (23° S And 29° S), Brazil : Investigation Of Causes And Electrophoretic Studies Of Total Proteins Of The Eye Lenses, Anna Emila A. De M. Vazzoler, Van Ngan Phan

Reports

The frequency and distribution of these specimens were analysed and the electrophoretic patterns of soluble eye-lens proteins were determined. This cataract is not of parasitic origin and was rare in specimens from the coastal area. In the lagunar region it occurs mainly in specimens of the River Baguacu from April to November.

Sandbridge Bulkhead Impact Study, C. Scott Hardaway Jr., George R. Thomas

Reports

No abstract provided.

Relative Effects Of Nutrient Enrichment And Grazing On Epiphyton-Macrophyte (Zostera Marina L.) Dynamics, Hilary A. Neckles

Dissertations, Theses, and Masters Projects

Dissolved nutrient concentrations and invertebrate grazing activity regulate epiphytic biomass. Because epiphyton may limit light and carbon at leaf surfaces and the consequent productivity of submerged macrophytes, factors which influence epiphytic biomass may indirectly affect macrophyte abundance. I measured the simultaneous effects of water column nutrients (ambient or 3x ambient concentrations of nitrogen and phosphorus) and grazing (presence or absence of epifaunal community) on epiphyton and macrophytes seasonally in eelgrass (Zostera marina L.) microcosms on lower Chesapeake Bay. Grazing was more important than nutrients in controlling accrual of total epiphytic biomass, although effects on epiphytic components varied; numbers of diatoms …

The Gametogenic Cycle Of Placopecten Magellanicus (Gmelin) In The Mid-Atlantic Bight, Anne Catherine Schmitzer

Dissertations, Theses, and Masters Projects

No abstract provided.

Stock Identification Of Summer Flounder (Paralichthis Dentatus) In The Southern Mid-Atlantic Bight, John A. Musick, Joseph C. Desfosse, A. Deane Estes, Paul Lyons

Reports

A total of 12, 339 summer flounder were tagged from Virginia waters during 1987-89. A total of 874 were recaptured for an overall return rate of 7 . 1%. Most of the returns ( 48.5%) were from Virginia waters, or areas to the south. A smaller number ( 21.6%) were from areas north and offshore of Virginia. Another 29. 9% were recaptured and returned with inadequate location data. Examining only the returns with adequate location data, yielded a separation of 69.2% and 30.8% between the groups. No differences were noted in the sizes at tagging between these groups. Tagged flounder …

Habitat Quality And Seasonal Foraging Patterns Of The Red-Cockaded Woodpecker (Picoides Borealis) In Southeastern Virginia, Dana Seward Bradshaw

Dissertations, Theses, and Masters Projects

No abstract provided.

Adrenal Histology And Reproductive Function In Peromyscus Maniculatus Bairdii And Peromyscus Leucopus Noveborocensis, Peggy Alicia Rouleau

Dissertations, Theses, and Masters Projects

No abstract provided.

The Effect Of Nitrogen And Phosphorus Supply Ratios And Dilution Rate On Phosphorus Uptake And Mineralization In Continuous Flow Microcosms, Peter M. Eldridge

Dissertations, Theses, and Masters Projects

Continuous flow microcosms (50L volume, salinity 18-24 ppt) were used to examine the roles of heterotrophic protozoa and bacteria as phosphorus mineralizers. Nitrogen limitation was regulated by N:P supply ratios (5:1, 16:1) and growth rate was regulated by dilution rate (0.5, 0.25 volumes day&\sp{lcub}-1{rcub}&). Rates of carbon and phosphorus uptake from dissolved inorganic pools were determined using &\sp{14}&C and &\sp{lcub}32{rcub}&P tracer experiments and pre- and post-fractionation incubations. Based on uptake rates and on POP and POC values of the bacteria in the &<&1.0 &\mu&m fraction, mass balance estimates of bacterial mineralization were determined. An isotope dilution method was used to determine phosphorus mineralization in the unfractionated sample. Heterotrophic protozoan mineralization was calculated as the difference. Results showed that bacteria had a minor role as remineralizers of phosphorus, more often taking-up inorganic phosphorus than remineralizing it. Heterotrophic protozoa were the major remineralizers of phosphorus. Microcosm treatments with a greater supply of inorganic phosphorus over nitrogen had increased POP concentrations and increased phosphorus remineralization. The effect of dilution on phosphorus remineralization was temperature dependent. Greater remineralization occurred in the high dilution rate in the July through October experiments and less remineralization occurred in the high dilution rate treatments in the December and January experiments.

Status Of The Virginia Public Oyster Fishery - Fall 1990, Bruce Barber

Reports

This report summarizes data collected during 1990 in the Virginia portion of the Chesapeake Bay. The report focuses on the fall oyster survey in Virginia.

Chesapeake Bay Status Of Stocks Report 1988-89 : Virginia Juvenile Finfish Trawl Data, Herbert M. Austin, Christopher F. Bonzek

Reports

The results presented here are the tabular Catch-per-Unit-gffort (CPUE) Virginia trawl data for young of the year and yearling finfish from the inception date of the survey (1954) to the present.

These data will also be the basis for developing a Virginia juvenile finfish index in 1989-1990.

Benthic Habitat Mapping For Living Resources, Robert J. Diaz, Paul Gapcynski, Virginia Institute Of Marine Science

Reports

Much of the development activity in Chesapeake Bay involves modification to subtidal bottoms. . . .

The Vascular Flora Of Western Isle Of Wight County, Virginia, Gregory Michael Plunkett

Dissertations, Theses, and Masters Projects

No abstract provided.

Growth Rate And Grazing Dynamics Of Coccoid Cyanobacteria In The Lower Chesapeake Bay, Carol J. Falkenhayn

Dissertations, Theses, and Masters Projects

No abstract provided.

Comparative Community Structure Of Surf-Zone Fishes In The Chesapeake Bight And Southern Brazil, Cassiano Monteiro-Neto

Dissertations, Theses, and Masters Projects

The structure of surf-zone fish communities at Cassino (western South Atlantic, WSA) and the Chesapeake Bight (western North Atlantic, WNA) is described using historical beach seine data, to examine similarities between geographically isolated fish communities. Numerical classification, ANCOVA, Shanon-Wiener diversity and its components, and species rarefaction are used to describe fish community structure: (a) within habitat (Cassino); (b) within region (Chesapeake Bight); (c) within the western Atlantic (comparison between Cassino and the Chesapeake Bight). The surf-zone fish community at Cassino had a low diversity and was dominated by a few species. Seasonal periods identified by cluster analysis correlated well with …

Frna Coliphages As A Viral Indicator Of Sewage Pollution In An Estuary, David Miller Boyd

Dissertations, Theses, and Masters Projects

No abstract provided.

The Effects Of Shading By Open-Pile Structures On The Density Of Spartina Alterniflora, Heather L. Mcguire

Dissertations, Theses, and Masters Projects

No abstract provided.

Patterns Of Habitat Utilization In 0-Age Summer Flounder (Paralichthys Dentatus), David M. Wyanski

Dissertations, Theses, and Masters Projects

No abstract provided.