Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte
History Of The Virginia Oyster Fishery, Chesapeake Bay, Usa, David M. Schulte
VIMS Articles
Oyster populations in Virginia's waters of Chesapeake Bay were lightly exploited until the early 1800s, when industrial fishery vessels first arrived, driven south from New England due to the collapse of northeastern oyster fisheries. Early signs of overexploitation and habitat degradation were evident by the 1850s. The public fishery, where oyster fishers harvest on state-owned bottom, rapidly developed after the Civil War and peaked in the early 1880s. Declines were noted by the late 1880s and eventually prompted the creation of Virginia's shell-planting and oyster-seed (young-of-the-year, YOY) moving repletion program in the 1920s. Despite management and increasing repletion efforts, the …
Abstracts Of Shellfish Technical Papers, Presented At The Joint Meeting Of The Northeast Aquaculture Conference And Exposition And The 35th Milford Aquaculture Seminar, Portland, Maine, January 14–16, 2015, National Shellfisheries Association
Abstracts Of Shellfish Technical Papers, Presented At The Joint Meeting Of The Northeast Aquaculture Conference And Exposition And The 35th Milford Aquaculture Seminar, Portland, Maine, January 14–16, 2015, National Shellfisheries Association
VIMS Articles
No abstract provided.
Abstracts Of Technical Papers, Presented At The 107th Annual Meeting, National Shellfisheries Association, Monterey, California, March 22–26, 2015, National Shellfisheries Association
Abstracts Of Technical Papers, Presented At The 107th Annual Meeting, National Shellfisheries Association, Monterey, California, March 22–26, 2015, National Shellfisheries Association
VIMS Articles
No abstract provided.
Abstracts Of Technical Papers, Presented At The 104th Annual Meeting, National Shellfisheries Association, Seattle, Washington, March 24–29, 2012, National Shellfisheries Association
Abstracts Of Technical Papers, Presented At The 104th Annual Meeting, National Shellfisheries Association, Seattle, Washington, March 24–29, 2012, National Shellfisheries Association
VIMS Articles
No abstract provided.
Abstracts Of Technical Papers Presented At The 103rd Annual Meeting National Shellfisheries Association Baltimore, Maryland March 27–31, 2011, National Shellfisheries Association
Abstracts Of Technical Papers Presented At The 103rd Annual Meeting National Shellfisheries Association Baltimore, Maryland March 27–31, 2011, National Shellfisheries Association
VIMS Articles
No abstract provided.
Molecular Identification, Phylogeny And Geographic Distribution Of Brazilian Mangrove Oysters (Crassostrea), Aline Grasielle Costa De Melo, Kimberly S. Reece
Molecular Identification, Phylogeny And Geographic Distribution Of Brazilian Mangrove Oysters (Crassostrea), Aline Grasielle Costa De Melo, Kimberly S. Reece
VIMS Articles
Oysters (Ostreidae) manifest a high degree of phenotypic plasticity, whereby morphology is of limited value for species identification and taxonomy. By using molecular data, the aim was to genetically characterize the species of Crassostrea occurring along the Brazilian coast, and phylogenetically relate these to other Crassostrea from different parts of the world. Sequencing of the partial cytochrome oxidase c subunit I gene (COI), revealed a total of three species of Crassostrea at 16 locations along the Brazilian coast. C. gasar was found from Curuca (Para state) to Santos (Sao Paulo state), and C. rhizophorae from Fortim (Ceara state) to Florianopolis …
Abstracts Of Technical Papers Presented At The 101st Annual Meeting National Shellfisheries Association Savannah, Georgia March 22–26, 2009, National Shellfisheries Association
Abstracts Of Technical Papers Presented At The 101st Annual Meeting National Shellfisheries Association Savannah, Georgia March 22–26, 2009, National Shellfisheries Association
VIMS Articles
No abstract provided.
Abstracts Of Technical Papers Presented At The 100th Annual Meeting National Shellfisheries Association Providence, Rhode Island April 6–10, 2008, National Shellfisheries Association
Abstracts Of Technical Papers Presented At The 100th Annual Meeting National Shellfisheries Association Providence, Rhode Island April 6–10, 2008, National Shellfisheries Association
VIMS Articles
No abstract provided.
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 …
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, …