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- Fisheries Science Peer-Reviewed Articles (7)
- Biological Sciences Peer-Reviewed Articles (5)
- Aquatic Health Sciences Peer-Reviewed Articles (2)
- Bay Scallop; Calico Scallop; Argopecten; Mtdna Variation; Geographic Variation; Restriction Fragment Length Polymorphism (1)
- Blue crabs (1)
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- CCRM Peer Reviewed Articles (1)
- Callinectes-sapidus; Chesapeake Bay (1)
- Callinectes-sapidus; Chesapeake Bay; Planktonic Availability (1)
- Chesapeake Bay (1)
- Domesticated animals (1)
- Fishes; Life (1)
- Forested wetlands (1)
- Image intensifier (1)
- NITRIFICATION POTENTIAL; BENTHIC MACROFAUNA; TUBES; BURROWS; AMMONIUM; IRRIGATION (1)
- Night-vision (1)
- Nitrous-Oxide Flux; Nitrosomonas-europaea; Atmospheric Chemistry; Methane Emission; Forest; Fire; Deforestation (1)
- Nocturnal (1)
- OYSTER; RECRUITMENT; GROWTH; JUVENILE; INTERTIDAL ZONATION (1)
- Population regulation (1)
- Predation (1)
- Rural (1)
- Striped bass (1)
- Urban (1)
Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
The Magnitude And Persistence Of Soil No, N2o, Ch4, And Co, Fluxes From Burned Tropical Savanna In Brazil, M Poth, Iris C. Anderson, Et Al
The Magnitude And Persistence Of Soil No, N2o, Ch4, And Co, Fluxes From Burned Tropical Savanna In Brazil, M Poth, Iris C. Anderson, Et Al
VIMS Articles
Among all global ecosystems, tropical savannas are the most severely and extensively affected by anthropogenic burning. Frequency of fire in cerrado,a type of tropical savanna covering 25% of Brazil, is 2 to 4 years. In 1992 we measured soil fluxes of NO, N2O, CH4, and CO2 from cerrado sites that had been burned within the previous 2 days, 30 days, 1 year, and from a control site last burned in 1976. NO and N2O fluxes responded dramatically to fire with the highest fluxes observed from newly burned soils after addition of water. Emissions of N-trace gases after burning were of …
Detection Of Haplosporidium-Nelsoni (Haplosporidia, Haplosporidiidae) In Oysters By Pcr Amplification, Na Stokes, Me Siddall, Em Burreson
Detection Of Haplosporidium-Nelsoni (Haplosporidia, Haplosporidiidae) In Oysters By Pcr Amplification, Na Stokes, Me Siddall, Em Burreson
VIMS Articles
Haplosporidium nelsoni is a protistan pathogen of the eastern oyster Crassostrea virginica, and has contributed to the decline of the oyster population in the Chesapeake Bay. From comparison of the sequence data of the 16S-like rDNA of H. nelsoni with those of Minchinia teredinis and other related organisms, 2 oligonucleotides which were specific to H. nelsoni and suitable for use as PCR primers were identified. These primers amplified a 564 base pair fragment of the small subunit (SSU) rRNA gene of H. nelsoni, but did not amplify genomic oyster DNA or the SSU rRNA genes of the haplosporidians Haplosporidium costale, …
Heat-Shock Proteins Of The Oyster Parasite Perkinsus-Marinus, Ct Tirard, Rm Grossfeld, Ak Volety, Fle Chu
Heat-Shock Proteins Of The Oyster Parasite Perkinsus-Marinus, Ct Tirard, Rm Grossfeld, Ak Volety, Fle Chu
VIMS Articles
The susceptibility of the eastern oyster Crassostrea virginica to infection by the protozoan parasite Perkinsus marinus is influenced by temperature. Because of the crucial roles of heat shock proteins in cellular thermal tolerance and in host-parasite adaptations in other species, we compared the in vitro heat shock responses of cultured P. marin us and of oyster hemocytes. The parasite and host heat shock proteins were different in size and in immunochemical specificity. In addition, the thermal threshold for inducing the response was higher for P. marinus acclimated to the same temperature as the oysters. The results suggest that EI marinus …
Mitochondrial-Dna Variation In The Bay Scallop, Argopecten-Irradians (Lamarck, 1819), And The Atlantic Calico Scallop, Argopecten-Gibbus (Linnaeus, 1758), Sandra G. Blake, John Graves
Mitochondrial-Dna Variation In The Bay Scallop, Argopecten-Irradians (Lamarck, 1819), And The Atlantic Calico Scallop, Argopecten-Gibbus (Linnaeus, 1758), Sandra G. Blake, John Graves
VIMS Articles
Restriction site variation of the mitochondrial DNA of Argopecten irradians ssp, was surveyed within four populations from the U.S. Atlantic coast and the Gulf of Mexico. A population from North Carolina was resampled one year after the first collection to provide a measure of temporal variation within a population. Haplotype diversity was high, with 49 haplotypes revealed among a total of 135 bay scallops screened with 8 restriction endonucleases. Nucleotide sequence divergences corrected for within-sample variation among populations ranged from 0.00%, between the temporal samples, to 0.33% between geographically distant populations. Tests for heterogeneity indicated that no two of the …
The Use Of Night-Vision Equipment To Observe Wildlife In Forested Wetlands, Kirk J. Havens, Walter I. Priest Iii, Ann Jennings
The Use Of Night-Vision Equipment To Observe Wildlife In Forested Wetlands, Kirk J. Havens, Walter I. Priest Iii, Ann Jennings
VIMS Articles
Urban forested wetlands and rural forested wetlands were studied to investigate the effectiveness of night-vision image intensifier equipment in the observation of medium-to-large animals and to investigate if surrounding landscape type influences wetland habitat value. Bats, cats, dogs, owls, deer, and humans were easily observed using the night-vision equipment. Differences in species use between the rural and urban forested wetland were observed. Light levels and noise levels were significantly higher (p
Introduction To The Proceedings Of The Blue Crab Recruitment Symposium, Ej Olmi, Rj Orth
Introduction To The Proceedings Of The Blue Crab Recruitment Symposium, Ej Olmi, Rj Orth
VIMS Articles
The blue crab, Callinectes sapidus Rathbun, is found in all major coastal habitats along the mid-Atlantic, South Atlantic and Gulf of Mexico coasts of the United States, including large embayments, barrier island-lagoonal systems, and coastal marsh, mangrove and seagrass systems. Ecologically important, blue crabs may control abundances of other estuarine benthic species (Hines et aI., 1990). The blue crab also supports valuable commercial and recreational fisheries from New Jersey to Texas; commercial landings of 249.3 million pounds of hard blue crabs in 1993 had a dockside value of 126.6 million dollars (NMFS, 1994). Blue crab stocks vary interannually within and …
Settlement Of Blue Crab Postlarvae In Western North Atlantic Estuaries, J Van Montfrans, Ce Epifano, Dm Knott, R M. Lipcius, Et Al
Settlement Of Blue Crab Postlarvae In Western North Atlantic Estuaries, J Van Montfrans, Ce Epifano, Dm Knott, R M. Lipcius, Et Al
VIMS Articles
We quantified variability in daily settlement of blue crab postlarvae (megalopae) on identical artificial settlement substrates at up to 6 sites concurrently over a broad geographic expanse (similar to 1300 km) of the western North Atlantic (Delaware-South Carolina, USA). The 4-year study encompassed the blue crab recruitment season (generally July-November) from 1989-1992. Regional settlement was characterized by: (1) constant low levels of daily settlement punctuated by significantly non-random, episodic peaks of variable duration and intensity with peaks collectively accounting for at least half the total annual settlement at a site; (2) spatial and temporal variability leading to a general lack …
Review Of Ecology And Fishery Of The Olympia Oyster, Ostrea Lurida With Annotated Bibliography, P Baker
Review Of Ecology And Fishery Of The Olympia Oyster, Ostrea Lurida With Annotated Bibliography, P Baker
VIMS Articles
The Olympia oyster, Ostrea lurida,is a small bivalve mollusk species native to the western United States and Canada. It was commercially important in the late 19th century, and was cultured in Washington State until a near-collapse of the industry in the 1950s. Since then it has made a minor commercial comeback, but has been largely superseded by the introduced Crassostrea gigas. Most significant literature dates from prior to the collapse of the industry in the 1950s, and much of this is comprised of state or federal agency reports, or similar obscure literature formats. This document is divided into 2 parts; …
Settlement Indices For Blue Crab Megalopae In The York River, Virginia: Temporal Relationships And Statistical Efficiency, Ks Metcalfe, J Van Montfrans, Rom Lipcius
Settlement Indices For Blue Crab Megalopae In The York River, Virginia: Temporal Relationships And Statistical Efficiency, Ks Metcalfe, J Van Montfrans, Rom Lipcius
VIMS Articles
The efficacy of artificial settlement substrates in quantifying relative rates of settlement of blue crab, Callinectes sapidus, postlarvae (megalopae) was examined. The technique has been widely used to assess settlement at local (Chesapeake Bay) and broad geographic scales (Atlantic and Gulf Coasts). This analysis examined differences in settlement between two configurations of substrates and two depths of deployment, in relation to lunar day, month, year and hours of flood tide occurring at night. Substrates were deployed daily for four years (1989-1992) during the settlement season (July-November) in the York River, Virginia. Settlement did not differ between substrate configurations (flat and …
Do Striped Bass And Blue Crab Abundances Correlate In Chesapeake Bay?, Thomas C. Mosca Iii, Paul J. Rudershausen, Rom Lipcius
Do Striped Bass And Blue Crab Abundances Correlate In Chesapeake Bay?, Thomas C. Mosca Iii, Paul J. Rudershausen, Rom Lipcius
VIMS Articles
We examined a corollary to the hypothesis that striped bass regulate the blue crab population in Chesapeake Bay by preying on juveniles, an expected inverse correlation between striped bass and blue crab abundance. Abundance indices based on Virginia striped bass young-of-the-year beach seine data (1980-1992) were constructed for fish ages 1 - 8, and for the Virginia resident stock component, ages 1 - 5. Fishery-independent, pound net data for fall and spring were also used to construct indices of striped bass abundance in Rappahannock River (1986-1993). Juvenile blue crab abundance indices were constructed based on trawl survey data from the …
Age And Growth Of Weakfish, Cynoscion Regalis, In The Chesapeake Bay-Region With A Discussion Of Historical Changes In Maximum Size, Susan K. Lowerre-Barbieri, Mark E. Chittenden, Luiz R. Barbieri
Age And Growth Of Weakfish, Cynoscion Regalis, In The Chesapeake Bay-Region With A Discussion Of Historical Changes In Maximum Size, Susan K. Lowerre-Barbieri, Mark E. Chittenden, Luiz R. Barbieri
VIMS Articles
Weakfish, Cynoscion regalis, were collected in 1989-93 from commercial catches in the Chesapeake Bay region, and special collections of large fish were made in Delaware Bay. Ages were based on sectioned otoliths. Most weakfish were 200-600 mm TL and ages 1-4 years. Maximum age was 17 years from a 1985 Delaware Bay fish. Maximum current observed ages were 12 years in Chesapeake Bay and 11 years in Delaware Bay. However, fish older than age 6 were rare in both areas. There was no evidence that Delaware Bay fish reached a larger maximum size or maximum age than Chesapeake Bay fish. …
An Analysis Of Weekly Fluctuations In Catchability Coefficients, Steven M. Atran, Joseph G. Loesch
An Analysis Of Weekly Fluctuations In Catchability Coefficients, Steven M. Atran, Joseph G. Loesch
VIMS Articles
No abstract provided.
Nitrification Potentials Of Benthic Macrofaunal Tubes And Burrow Walls: Effects Of Sediment Nh4+ And Animal Irrigation Behavior, Ms Mayer, L Schaffner, Wm Kemp
Nitrification Potentials Of Benthic Macrofaunal Tubes And Burrow Walls: Effects Of Sediment Nh4+ And Animal Irrigation Behavior, Ms Mayer, L Schaffner, Wm Kemp
VIMS Articles
We examined the natural variation of nitrification potentials (NPs) of surface sediments and macrofaunal tubes and burrow walls in relation to sediment NH4+ level, season, and macrofaunal species. NP (the ability of a unit of sediment to oxidize NH4+ when NH4+ and O-2 are not limiting) is an index of the abundance and activity of nitrifying bacteria which we measured in slurries with the chlorate block technique (nmol NO2--N produced g(-1) dry weight sediment h(-1)). The NP of the tubes of the polychaete Loimia medusa was positively related to sediment NH4+ (KCl-extractable) concentration at 3 sites where tubes were collected …
Early Recruitment And Growth Of The American Oyster Crassostrea Virginica (Bivalvia: Ostreidae) With Respect To Tidal Zonation And Season, Gc Roegner, Roger L. Mann
Early Recruitment And Growth Of The American Oyster Crassostrea Virginica (Bivalvia: Ostreidae) With Respect To Tidal Zonation And Season, Gc Roegner, Roger L. Mann
VIMS Articles
Survival and growth of newly settled oysters were measured at sub- and intertidal treatment levels during the first month of post-settlement life in the York River, Virginia, USA. Controlled settlement of hatchery-reared larvae in the laboratory and image analysis techniques allowed for individual oysters grown in the field to be tracked through time. High mortality occurred within 1 wk postsettlement at ah tidal heights in 3 experiments which spanned the natural recruitment period. This initial mortality strongly influenced later abundance, as weekly mortality rates decreased sharply after 2 wk. Additionally, all recruits were eliminated from the mid-intertidal zone and above …