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Articles 31 - 47 of 47
Full-Text Articles in Life Sciences
Continuing Trophic Studies On Constructed “Restored” Oyster Reefs, Roger Mann, Juliana M. Harding
Continuing Trophic Studies On Constructed “Restored” Oyster Reefs, Roger Mann, Juliana M. Harding
Reports
No abstract provided.
Trophic Studies On Constructed “Restored” Oyster Reefs, Roger L. Mann, Juliana Harding
Trophic Studies On Constructed “Restored” Oyster Reefs, Roger L. Mann, Juliana Harding
Reports
No abstract provided.
Filtration By Oysters : Interactive Effects Of Water Flow, Seston Composition And Filtration Rate, Mark W. Luckenbach, Deborah A. Harsh, Roger L. Mann, R J. Orth, Ken Moore
Filtration By Oysters : Interactive Effects Of Water Flow, Seston Composition And Filtration Rate, Mark W. Luckenbach, Deborah A. Harsh, Roger L. Mann, R J. Orth, Ken Moore
Reports
Filtration by suspension-feeding bivalves affects water quality and the postulated impacts include increased light penetration and enhanced benthic primary production. Such system-level predictions are extrapolated fiom still water experiments which neglect the effects of flow, seston composition, turbulent mixing and refiltration by oysters within groups. Flume experiments were used to investigate the effects of varying flow speed and seston composition on filtration capacity of oysters. Six groups of 90 oysters were used in treatments which varied concentrations of the algae Ekalassiosira weisj70grgrsie parately and in combination with inorganics; four sets of shell only controls were used to evaluate hydrodynamic effects. …
A Comparative Study Of Dry Weight Measurements Of Oyster Soft Tissue, Cheol Mo, Bruce Neilson
A Comparative Study Of Dry Weight Measurements Of Oyster Soft Tissue, Cheol Mo, Bruce Neilson
Reports
Four alternative drying methods for oyster soft tissue were compared: oven drying at 105, 100 and 80°C and freeze drying. Weights were recorded every 12 hours for 5 days, and after sample treatments were switched, every 24 hours for another 3 days. The time required for all of the oysters in a treatment to reach constant weight were 36, 36, 60, and 120 hours for the 105, 100, 80°C ovens and freeze drier respectively. Within a treatment, the time for an individual oyster to reach constant weight was not related to that weight. For oven drying, drying was rapid and …
Temporal And Spatial Changes In Fecundity Of Eastern Oysters, Crassostrea Virginica (Gmelin, 1791) In The James River, Virginia, Carrollyn Cox, Roger L. Mann
Temporal And Spatial Changes In Fecundity Of Eastern Oysters, Crassostrea Virginica (Gmelin, 1791) In The James River, Virginia, Carrollyn Cox, Roger L. Mann
VIMS Articles
A~u1t Crass~strea virgi.nic~ ~Gmelin) were examined during the reproductive season of 1986 to determine temporal and spatial vanation m fecundity among md!Vldual female oysters from four reefs in the James River, Virginia. Sex ratio and oyster abu.ndance were. ~so determined to :acilitate ~s~imation of total reproductive output of oyster assemblages. Fecundity was highly vanable, both w1thm and among locations. Vanation was attributed to differences in oyster size, asynchrony and variation in time since pri~r spawning, prevalence of parasites (especially Haplosporidium nelsoni (MSX) and Perkinsus marinus) and differing salinity regimes.
Effects Of Perkinsus Marinus Infection In The Eastern Oyster, Crassostrea Virginica: I. Susceptibility Of Native And Msx-Resistant Stocks, Eugene Burreson
Effects Of Perkinsus Marinus Infection In The Eastern Oyster, Crassostrea Virginica: I. Susceptibility Of Native And Msx-Resistant Stocks, Eugene Burreson
VIMS Articles
A selective breeding program was implemented to attempt to decrease the disease susceptibility of the eastern oyster, Crassostrea virginica, to Perkinsus marinus. Six oyster strains were spawned and the progeny exposed to Haplosporidium nelsoni (MSX) and P. marinus in the lower Chesapeake Bay. Three strains, a Delaware Bay MSX-resistant strain, a Delaware Bay native strain, and a Mobjack Bay native strain (lower Chesapeake Bay) were exposed for three years (1988-90); three other strains, a separate Delaware Bay MSX-resistant strain, a lower James River native strain (lower Chesapeake Bay) and a susceptible control strain, were exposed for two years (1989-90). …
Sterile Triploid Crassostrea Virginica (Gmelin, 1791) Grow Faster Than Diploids But Are Equally Susceptible To Perkinsus Marinus, Bruce J. Barber, Roger L. Mann
Sterile Triploid Crassostrea Virginica (Gmelin, 1791) Grow Faster Than Diploids But Are Equally Susceptible To Perkinsus Marinus, Bruce J. Barber, Roger L. Mann
VIMS Articles
Growth, tolerance of Perkinsus marinus, and gametogenesis of diploid and triploid Eastern oysters, Crassostrea virginica (Gmelin, 1791) were compared in the York River, Virginia between June 1989 and November 1990. Triploid oysters had significantly greater mean shell height (P ,a;; 0.02) and whole weight (P ,a;; 0.005) than diploid oysters throughout the study period. In November 1990, triploids had significantly greater mean dry tissue weight (P ,a;; 0.006) than diploids. On average, triploid oysters reached commercial size (63.5 mm) 5 months before diploid oysters. Diploid and triploid groups became similarly infected with P. marinus during summer 1990. Prevalences reached 96% …
Recruitment And Growth Of Oysters On Shell Planted At Four Monthly Intervals In The Lower Potomac River, Maryland, Reinaldo Morales-Alamo, Roger L. Mann
Recruitment And Growth Of Oysters On Shell Planted At Four Monthly Intervals In The Lower Potomac River, Maryland, Reinaldo Morales-Alamo, Roger L. Mann
VIMS Articles
Oyster shells were planted on four successive months (May to August 1986) in contiguous plots at Jones Shore Bar in the Potomac River, Maryland, to study the effect of differences in time of cultch planting on settlement and survival of oyster spat. The plots were usually sampled at two-week intervals from time of planting through November, 1986, and once in June, 1987. A massive concentration of the tunicate Molgula manhattensis covered the bottom in all plots within four to six or eight weeks following shell planting. A commercially acceptable number of spat per shell, between 1.8 and 2.2 (approximately equivalent …
Seed Oysters Stressed By Low Spring Salinities In Virginia, Dexter Haven, Jay Andrews
Seed Oysters Stressed By Low Spring Salinities In Virginia, Dexter Haven, Jay Andrews
Reports
No abstract provided.
Epizootiology Of Late Summer And Fall Infections Of Oysters By Haplosporidium Nelsoni, And Comparisons To Annual Life Cycle Of Haplosporidium Costalis, A Typical Haplosporidan, J. D. Andrews
VIMS Articles
The two haplosporidan parasites that cause diseases of oysters along the middle North Atlantic coast of North America differ in their habitats, in timing of oyster mortalities, and in their adaptations to the host. Haplosporidium nelsoni (MSX) kills oysters throughout the year over a wide range of salinities (about 15 to 30 ppt). It has a long infective period of nearly 6 months. This pathogen rarely completes sporulation in its life cycle in oysters. It is highly pathogenic and exhibits irregular activity suggesting that it is poorly adapted to the host species. In contrast, Haplosporidium costalis (SSO) has a short, …
Potential Effects Of The 1980-81 Drought On Oyster Diseases And Predators, J. D. Andrews
Potential Effects Of The 1980-81 Drought On Oyster Diseases And Predators, J. D. Andrews
Reports
No abstract provided.
Perkinsus Marinus = Dermocystidium Marinum ("Dermo") In Virginia, 1950-1980 : A Record Of Fluid Thioglycollate Tests For Dermo In Oysters From Public And Private Oyster Beds, And From Trays Of Disease-Free Oysters Transplanted To Areas Where Msx And Dermo Are Endemic, Jay D. Andrews
Reports
No abstract provided.
Manual For Design And Operation Of An Oyster Seed Hatchery, John L. Dupuy, Nancy T. Windsor, Charles E. Sutton
Manual For Design And Operation Of An Oyster Seed Hatchery, John L. Dupuy, Nancy T. Windsor, Charles E. Sutton
Reports
No abstract provided.
Shell Bags For Catching Oyster Spat, Dexter Haven, David Garten
Shell Bags For Catching Oyster Spat, Dexter Haven, David Garten
Reports
No abstract provided.
Cultchless Seed Oysters, J. D. Andrews, Lawrence W. Mason
Cultchless Seed Oysters, J. D. Andrews, Lawrence W. Mason
Reports
No abstract provided.
The Adventures Of Little Oyster, Revised Edition, Robert S. Bailey, Fred C. Biggs
The Adventures Of Little Oyster, Revised Edition, Robert S. Bailey, Fred C. Biggs
Reports
First published in 1955.
The Adventures Of Little Oyster, Robert S. Bailey