Life Sciences Commons^™

End-Products Of Anaerobic Chitin Degradation By Salt-Marsh Bacteria As Substrates For Dissimilatory Sulfate Reduction And Methanogenesis, Jn Boyer

VIMS Articles

The anaerobic pathway of chitin decomposition by chitinoclastic bacteria was examined with an emphasis on end product coupling to other salt marsh bacteria. Actively growing chitinoclastic bacterial isolates produced primarily acetate, H2, and CO2 in broth culture. No sulfate-reducing or methanogenic isolates grew on chitin as sole carbon source or produced any measurable degradation products. Mixed cultures of chitin degraders with sulfate reducers resulted in positive sulfide production. Mixed cultures of chitin-degrading isolates with methanogens resulted in the production of CH4 with reductions in headspace CO2 and H2. The combination of all three metabolic types resulted in the simultaneous production …

Variable Functional Responses Of A Marine Predator In Dissimilar Homogeneous Microhabitats, Rn Lipcius, Anson Hines

VIMS Articles

Adult soft-shelled clams (Mya arenaria) persist at low densities in Chesapeake Bay sandy habitats despite Intense predation by blue crabs (Callinectes sapidus). Clam persistence may be a consequence of variation in blue crab foraging rates as a function of clam density and sediment composition. In laboratory aquaria, we measured the functional responses (prey consumption per predator as a function of prey density) of large blue crabs to six densities of adult soft-shelled clams buried at natural depths in two sediment types (mud and sand). Functional responses in sand and mud were differentiated statistically by analyses of(1) residuals and residual sums …

Water Quality In A Virginia Potomac Embayment: Belmont-Occoquan Bay, Yothin Unkulvasapaul, Paul V. Hyer, Albert Y. Kuo

Reports

No abstract provided.

Handle With Care : Mid-Atlantic Marine Animals That Demand Your Respect, Jon Lucy

Reports

Generally speaking, the marine organisms found along middle Atlantic shores are not considered threatening to people. However, some of these animals can cause problems, either upon simple contact with the skin, as in the case of some jellyfish, or through careless handling. Larger inhabitants of coastal waters, such as stingrays and sharks, must always be treated with great respect because of the danger potential and their unpredictable nature. The following description of nuisance and potentially harmful organisms is presented to help coastal residents and visitors become more aware of how problems with such marine animals might develop, how they can …

The College Of William And Mary, School Of Marine Science, 1986-87 Program, College Of William And Mary, School Of Marine Science

Miscellaneous

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

Cooperative Agreement For Experimental Stocking Of Striped Bass In Virginia's Tidal Waters : Signing Ceremony, Virginia Institute Of Marine Science

Miscellaneous

Program brochure for the signing ceremony May 23, 1986. List of speakers.

Norfolk's Harborfest '86: A Tenth Anniversary Analysis, Jon A. Lucy, Eleanor A. Bochenek

Reports

No abstract provided.

Arctica Islandica (Linne) Larvae: Active Depth Regulators Or Passive Particles?, Roger L. Mann

VIMS Articles

The seasonal change in depth distribution of Arctica islandica (Linne) larvae at a station on the Southern New England Shelf for the period April-December 1981 is compared with the output of a numerical model designed to predict distribution in a scenario where active depth regulation predominates. Larvae in excess of 200 J.Lm length were present in the field in May at 1-30 m depth and, at depths of 20-40 m from late July through November. The majority of larvae captured in November were shelled veligers of 110 J.Lm length. Good agreement of the model with field data exists with respect …

The Public Oyster Bottoms In Virginia : An Overview Of Their Size, Location, And Productivity, Dexter S. Haven, James P. Whitcomb

VIMS Articles

The location size and extent of Virginia's public oyster grounds was determined using a long pole to probe the bottom , a towed sonic device that detected shell or oysters, and by sampling the bottom with patent tongs for shell and oyster density. Station location was determined using an electronic positioning system (Raydist® ). Bottoms were classed as oyster reefs, mud-shell or sand shell (productive or potentially productive). Areas having mud or sand or those in deep water over 30 ft. (9.1 m) were considered unproductive. Average oyster harvest for seed and market size oysters over the last ten years …

Peniagone-Leander New Species, An Abyssal Benthopelagic Sea-Cucumber (Echinodermata, Holothuroidea) From The Eastern Central Pacific-Ocean, Dl Pawson, Ej Foell

VIMS Articles

Peniagone leander. new species, differs from other Peniagone species in possessing the combination of: an ovoid body, lateral ridges defining right and left margins of body, anterior veil (velum) with four projections, two pairs of anterior dorsal projections posterior to velum, four pairs of posterior ventral tube feet. The reddish-brown body reaches a length of approximately 30 em. P. leander is the second species of the genus known to be benthopelagic. The species is fairly common where it occurs, dividing its time between actively swimming above the bottom and feeding on the sediment surface.

Geochemistry And Deposition Of Be-7 In River‐Estuarine And Coastal Waters, C. R. Olsen, I. L. Larsen, P. D. Lowry, N. H. Cutshall, Maynard Nichols

VIMS Articles

The atmospheric flux of cosmogenic Be-7 (53.3-day half-life) and the mode of ?Be deposition in river- estuarine and coastal environments have been examined. The atmospheric flux of ?Be commonly sup- ports inventories ranging from 1.0 to 2.0 pCi/cm 2 (1 pCi = 0.037 Bq). Beryllium 7 concentrations in water phase samples, collected across salinity gradients in several estuaries along the eastern coastline of the United States, range from 0.03 to 0.53 pCi/L and primarily reflect variations in Be-7supply and sorption kinetics. The major process controlling the concentration of Be-7 on estuarine suspended particles appears to be the length of time …

The York River: A Brief Review Of Its Physical, Chemical And Biological Characteristics, Michael E. Bender

Reports

The purpose of this paper is to provide an overview of the physical, chemical and biological characteristics of the York River, Virginia. The river is formed by the confluence of the Mattaponi and Pamunkey rivers at West Point, Virginia. It is tidal over its entire length and flows to the western shore of Chesapeake Bay.

Oyster Shoal Survey - Fall 1986, James Whitcomb

Reports

This report summarizes data collected during 1986 in the Virginia portion of the Chesapeake Bay. The report focuses on the fall oyster survey in Virginia.

Chesapeake Bay Research Initiatives At The Virginia Institute Of Marine Science Of The College Of William And Mary : Accomplishments For The 1984-1986 Biennium And Projected Activities For The 1986-1988 Biennium, Virginia Institute Of Marine Science

Reports

This is the biennium report for the 1984-1986 Commonwealth's Chesapeake Bay Initiatives for Research. Funding thereby directed to the Virginia Institute of Marine Science allowed augmentation of the Institute's directed research program which is devoted to the conservation and preservation of the living marine resources of the Commonwealth. Specifically, the funds were directed towards three program areas: 1) Biological and River Circulation Studies for Revitalization of the James River Seed Oyster Beds; 2) Environmental Factors Controlling Critical Finfish Populations; and 3) Chemical Poisons in Virginia's Tidal Waters.

Oyster Shoal Survey - Fall 1984, James Whitcomb

Reports

This report summarizes data collected during 1984 in the Virginia portion of the Chesapeake Bay. The report focuses on the spring oyster survey in Virginia.

Oyster Shoal Survey - Fall 1985, James Whitcomb

Reports

This report summarizes data collected during 1986 in the Virginia portion of the Chesapeake Bay. The report focuses on the fall oyster survey in Virginia.

Cooperative State Agency Program / Annual Report Fy 1985-1986, Virginia Institute Of Marine Science

Reports

A.. Potomac embayment water quality models --

B. Model documentation and users' manual --

C. Monitoring the state of the rivers --

D. Advisory services on models and other matters --

E. HPLC separation of polar toxic organic compounds, CSA 1983-1984 / C.W. Su, R.H. Bieri and R.J. Huggett --

F. Toxic organic monitoring, CSA 1983-1984 / P.O. deFur and R.J. Huggett --

G. Trace organic analyses of effluent waters from a model slurry pipeline carrying Appalachian bituminous coal P.O. deFur and W.G. MacIntyre.

Laboratory And Field Investigations Of Potential Predation On Early Life Stages Of Striped Bass In The Pamunkey River, Virginia /, John E. Olney, Gary H. Hill

Reports

Predation is recognized as an important factor regulating survival of larval fishes and it is likely that both fish and invertebrate species are predators of striped bass eggs and larvae, yet few studies have documented such interactions in tidal freshwater systems. As a result, this study incorporated the following objectives: (1) determine kinds and relative abundances of potential fish and invertebrate predators of striped bass larvae through field surveys: (2) document acceptability of yolksac larvae as a prey item through laboratory experimentation with fish and invertebrate species: (3) establish preliminary estimates of consumption of yolksac larvae under laboratory conditions of …

Oyster Shoal Survey - Spring 1986, James Whitcomb

Reports

This report summarizes data collected during 1986 in the Virginia portion of the Chesapeake Bay. The report focuses on the spring oyster survey in Virginia.