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Full-Text Articles in Life Sciences
Spectral Differences And Temporal Stability Of Phycoerythrin Fluorescence In Estuarine And Coastal Waters Due To The Domination Of Labile Cryptophytes And Stabile Cyanobacteria, Rj Exton, Wm Houghton, W Esaias, Lw Haas, D Hayward
Spectral Differences And Temporal Stability Of Phycoerythrin Fluorescence In Estuarine And Coastal Waters Due To The Domination Of Labile Cryptophytes And Stabile Cyanobacteria, Rj Exton, Wm Houghton, W Esaias, Lw Haas, D Hayward
VIMS Articles
Laser fluorosensing and epifluorescence microscopy were used jointly to identify the origin of different spectral peaks of phycoerythrin in estuarine and coastal samples. The fluorescence of the samples was also examined as a function of the time elapsed after a water circulation system was turned on. Coastal samples were dominated by cyanobacteria and exhibited a constant phycoerythrin fluorescence with time. The phycoerythrin fluorescence of the Chesapeake Bay estuarine samples first increased strongly, reached a maximum, and then decreased to below the original level; these samples were dominated by cryptophytes which epifluorescence techniques revealed were being destroyed by the circulation system. …
Seasonal-Variation In Survival Of Escherichia-Coli Exposed Insitu In Membrane-Diffusion Chambers Containing Filtered And Nonfiltered Estuarine Water, I. C. Anderson, Mw Rhodes, Hi Kator
Seasonal-Variation In Survival Of Escherichia-Coli Exposed Insitu In Membrane-Diffusion Chambers Containing Filtered And Nonfiltered Estuarine Water, I. C. Anderson, Mw Rhodes, Hi Kator
VIMS Articles
Human fecal Escherichia coli isolates were exposed over a seasonal cycle to estuarine water in diffusion chambers filled with double-filtered (0.45 and 0.2 p.m) and nonfiltered water. Laboratory manipulations of E. coli cultures before estuarine exposure were reduced to minimize sublethal stress, and nonselective or resuscitative enumeration techniques were employed to maximize recovery of stressed cells. E. coli was capable of extended survival during in situ exposure to estuarine water, provided eucaryotes were excluded from diffusion chambers. Survival was directly related to temperature in absence of the eucaryote component of the natural microbiota. Although it was not possible to prevent …
In Situ Development Of Sublethal Stress In Escherichia-Coli - Effects On Enumeration, Mw Rhodes, Iris C. Anderson, H Kator
In Situ Development Of Sublethal Stress In Escherichia-Coli - Effects On Enumeration, Mw Rhodes, Iris C. Anderson, H Kator
VIMS Articles
No abstract provided.
Hard Clam, Mercenaria-Mercenaria - Shell Growth-Patterns In Chesapeake Bay, Lowell W. Fritz, Dexter S. Haven
Hard Clam, Mercenaria-Mercenaria - Shell Growth-Patterns In Chesapeake Bay, Lowell W. Fritz, Dexter S. Haven
VIMS Articles
No abstract provided.
Chemical Induction Of Spawning By Serotonin In The Ocean Quahog Arctica Islandica (Linne), M. C. Gibbons, J. G. Goodsell, M. Castagna, R. Lutz
Chemical Induction Of Spawning By Serotonin In The Ocean Quahog Arctica Islandica (Linne), M. C. Gibbons, J. G. Goodsell, M. Castagna, R. Lutz
VIMS Articles
Serotonin injected into the anterior adductor muscle induced spawning in the ocean quahog Arcrica islandica (Linne) when using either individual or mass spawning techniques. This represents the fir st successful attempt to induce the release of gametes in this species which historically has been unresponsive to conventional spawning stimuli. The gametes released were competent and fertilization occurred without treating the encapsulated eggs with ammonium hydroxide or other chemicals. Larvae were reared through metamorphosis to early juvenile stage.
The Origin And Extent Of Oyster Reefs In The James River, Virginia, Dexter S. Haven, James P. Whitcomb
The Origin And Extent Of Oyster Reefs In The James River, Virginia, Dexter S. Haven, James P. Whitcomb
VIMS Articles
The public oyster grounds (Baylor Survey Grounds) in the James River, VA, were studied with respect to bottom type and oyster density from 1978 to 1981. Approximately 10,118 ha (25,000 acres) were investigated using an electronic positioning system to establish station locations. Bottom types were determined using probing pipes, patent tongs, and an acoustical device. About 17.1% of the bottom was classified as consolidated oyster reef, and 47.5% was moderately productive mud-shell or sand-shell bottoms. The remaining 35.4% was rated as unsuitable for oyster culture. The surface configuration of oyster reef areas in the James River is similar to those …
Reproductive-Biology Of The Blueline Tilefish, Caulolatilus-Microps, Off North-Carolina And South-Carolina, Jeffery L. Ross, John Merriner
Reproductive-Biology Of The Blueline Tilefish, Caulolatilus-Microps, Off North-Carolina And South-Carolina, Jeffery L. Ross, John Merriner
VIMS Articles
No abstract provided.
Apagesoma-Edentatum, A New Genus And Species Of Ophidiid Fish From The Western North-Atlantic, Hj Carter
Apagesoma-Edentatum, A New Genus And Species Of Ophidiid Fish From The Western North-Atlantic, Hj Carter
VIMS Articles
A new genus and species of deep-sea fish, Apagesoma eden/alum, (family Ophidiidae), is described from deep waters off the Bahamas. It can be distinguished from other ophidiid genera by the following characters: an enlarged and swollen anterior nostril; eyes placed anteriorly on the head; moderate-sized, unsculptured, hemispheric-shaped sagitta; absence ofa basibranchial tooth patch; absence of an opercular spine; large sub-terminal mouth, with non-protrusible jaws. Typhlonus delosommalus Hureau et aI., 1979 is placed in Apagesoma based on similarities in otoliths, non-protrusibility of jaws, swollen anterior nostrils and absence of a basi branchial tooth patch. Typhlonus contains only the type species, T. …
Transport Of Bivalve Larvae In James River, Virginia, J. D. Andrews
Transport Of Bivalve Larvae In James River, Virginia, J. D. Andrews
VIMS Articles
For nearly 100 years, the James River has been the primary source of seed oysters for Virginia. A disease caused by Minchinia nelsoni (MSX) killed most oysters in high-salinity waters in the lower river in 1959 and 1960, and planting has not been resumed in these areas (Andrews 1983). Large populations of oysters on Hampton Bar and near the mouth of the river which served as broodstocks were destroyed. After 1960, setting declined drastically in regularity and intensity to about one tenth of that which occurred in the 1950's. Setting patterns suggest two types of seed areas in Chesapeake Bay: …
Morphology And Development Of Hatchery-Cultured American Shad, Alosa-Sapidissima (Wilson), James R. Johnson, Joseph G. Loesch
Morphology And Development Of Hatchery-Cultured American Shad, Alosa-Sapidissima (Wilson), James R. Johnson, Joseph G. Loesch
VIMS Articles
No abstract provided.
Culture Methods For Growing The Clam Mercenaria Mercenaria, Michael Castagna
Culture Methods For Growing The Clam Mercenaria Mercenaria, Michael Castagna
VIMS Articles
A pilot-scale experimental clam farming operation has been carried out since 1975 by the Virginia Institute of Marine Science of the College of William and Mary at Wachapreague, Virginia, on the mid Atlantic coast of the United States. The bivalve Mercenaria mercenaria (Linne, 1758) grown in this experiment is a commercially-important mollusk found principally in the central latitudes of the Western Atlantic.
Comparative Ecology Of Nekton Residing In A Tidal Creek And Adjacent Seagrass Meadow: Community Composition And Structure, Mp Weinstein, Ha Brooks
Comparative Ecology Of Nekton Residing In A Tidal Creek And Adjacent Seagrass Meadow: Community Composition And Structure, Mp Weinstein, Ha Brooks
VIMS Articles
No abstract provided.