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- Fisheries Science Peer-Reviewed Articles (11)
- Biological Sciences Peer-Reviewed Articles (10)
- Aquatic Health Sciences Peer-Reviewed Articles (3)
- Activated-Sludge Treatment; N-15 Tracer Method; Waste-Water; Chesapeake Bay; Matter; Phytoplankton; Seawater (1)
- Atlantic Subtropical Gyre; Ocean Primary Production; North Pacific-Ocean; Time-Series; Oceanographic Conditions; Interannual Variability; Satellite Chlorophyll; Generalized-Model; Skill Assessment; Sargasso Sea (1)
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- Bass Morone-Saxatilis; Striped Bass; Skin Ulcers; Sp-Nov.; Marinum; Aphanomyces; Mortality; Evolution; Infection; Menhaden (1)
- Belgian Coastal Waters; Ross Sea; North-Sea; Globosa Prymnesiophyceae; Climate-Change; Antarctica Prymnesiophyceae; Environmental-Factors; Community Structure; Genus Phaeocystis; Viral-Infection (1)
- Blue Crab; Callinectes Sapidus; Oyster Reef; Crassostrea Virginica; Habitat; Great Wicomico River (1)
- Bycatch reduction device; Diamondback terrapin; Blue crab; Trap mortality (1)
- Chesapeake Bay; Crassostrea-Virginica; Eastern Oyster; River; Sediment; Eutrophication; Usa; Rehabilitation; Foraminifera; History (1)
- Community Composition; Daphnia-Magna; Copepods; Diversity; Lake; Microorganisms; Biogeography; Dynamics; Rates; Flux (1)
- Complex Decision-Making; Fisheries (1)
- Copepod Fecal Pellets; Aggregates Lake Snow; Dissolved Organic-Carbon; Fresh-Water Zooplankton; Resting-Egg-Production; Acartia-Tonsa Dana; Vibrio-Cholerae; Marine-Bacteria; Community Composition; Chitin Utilization (1)
- Crassostrea virginica (1)
- Ctenophore Mnemiopsis-Leidyi; Lower Chesapeake Bay; Acartia-Tonsa; Nonconsumptive Mortality; Turbidity Maximum; Boundary-Layer; Prey Detection; Zooplankton; Sea; Decomposition (1)
- Decapod crustacens (1)
- Dwelling Snapping Shrimp; Belize Barrier-Reef; Synalpheus-Regalis; Host-Specificity; Mole-Rats; Eusociality; Selection; Constraints; Alpheidae; Altruism (1)
- Fresh-Water Crayfish; Aphanomyces-Invadans; Atlantic Menhaden; Pathogen; Fish; Susceptibility; Host (1)
- Global Biodiversity; Climate-Change; Extinctions; Declines; Benefits; Future; Index (1)
- Herring Clupea-Harengus; Polymorphic Microsatellites; Tag Returns; Dna; Differentiation; Loci; Fish; Software; Patterns; Allozyme (1)
- Jellyfish Aurelia-Aurita; Sargasso Sea; Ammonium Regeneration; Vertical Migration; Growth Efficiency; Active-Transport; Metabolic Rates; Acartia-Tonsa; Excretion; Ctenophores (1)
- Latitudinal Variation; Lake Sturgeon; Life-History; Fish; Fisheries (1)
- Long-Term Changes; North-Sea; Organic Nitrogen; Spring Bloom; Marine-Phytoplankton; Natural-Populations; Inorganic Nitrogen; Coastal Waters; Nutrient; Ammonium (1)
- Mannan-Binding Lectin; Rainbow-Trout; Immunoglobulin Receptor; Channel Catfish; Immune-Response; Salmo-Gairdneri; Hepatic-Uptake; Cross-Linking; Affinity; Antibody (1)
- Marine-Phytoplankton; Carbon Acquisition; Prymnesiophyceae; Enrichment; Mechanisms; Sulfur (1)
- Physical Sciences Peer-Reviewed Articles (1)
- Plant-Capacity; Fisheries; Efficiency; Rent (1)
- Reefs (1)
- Ross Sea; Water-Column; Bransfield Strait; Aquatic Systems; Sediment Traps; Twilight Zone; Time-Series; Upper Ocean; Long-Term; Th-234 (1)
- Seagrass (1)
Articles 1 - 26 of 26
Full-Text Articles in Aquaculture and Fisheries
Controlling Excess Capacity In Common-Pool Resource Industries: The Transition From Input To Output Controls, D Squires, Y Jeon, Rq Grafton, J Kirkley
Controlling Excess Capacity In Common-Pool Resource Industries: The Transition From Input To Output Controls, D Squires, Y Jeon, Rq Grafton, J Kirkley
VIMS Articles
Overcapacity is a major problem in common-pool resources. Regulators increasingly turn from limited entry to individual transferable use rights to address overcapacity. Using individual vessel data from before and after the introduction of individual harvest rights into a fishery, the paper investigates how characteristics of rights, scale of operations and transition period affect changes in individual and fleet capacity utilisation and excess capacity. The results indicate that individual harvest rights in both theory and practice offer the potential to address the problem of overcapacity in common-pool resources currently managed with limited-entry regulations.
Temperature Effects On Growth, Colony Development And Carbon Partitioning In Three Phaeocystis Species, Xd Wang, Kw Tang, Y Wang, Walker O. Smith Jr.
Temperature Effects On Growth, Colony Development And Carbon Partitioning In Three Phaeocystis Species, Xd Wang, Kw Tang, Y Wang, Walker O. Smith Jr.
VIMS Articles
Phaeocystis is an ecologically important marine phytoplankton genus that is globally distributed. We examined the effects of temperature on the 3 most common species: P. globosa, P. antarctica, and P. pouchetii, which grew at 16-32, 0-6, and 4-8 degrees C, respectively. P. pouchetii did not form colonies; P. globosa formed colonies at 16, 20, and 24 degrees C, and P. antarctica colonies were observed at all temperatures. More cells were partitioned into the colonial form at lower temperatures than at higher temperatures for P. globosa and P. antarctica. P. globosa colony size decreased with temperature, whereas P. antarctica colony size …
A Molecular Genetic Investigation Of The Population Structure Of Atlantic Menhaden (Brevoortia Tyrannus), Abigail J. Lynch, Jan E. Mcdowell, John Graves
A Molecular Genetic Investigation Of The Population Structure Of Atlantic Menhaden (Brevoortia Tyrannus), Abigail J. Lynch, Jan E. Mcdowell, John Graves
VIMS Articles
Atlantic menhaden (Brevoortia tyrannus), through landings, support one of the largest commercial fisheries in the United States. Recent consolidation of the once coast-wide reduction fishery to waters within and around Chesapeake Bay has raised concerns over the possibility of the loss of unique genetic variation resulting from concentrated fishing pressure. To address this question, we surveyed variation at the mitochondrial cytochrome c oxidase subunit I (COI) gene region and seven nuclear microsatellite loci to evaluate stock structure of Atlantic menhaden. Samples were collected from up to three cohorts of Atlantic menhaden at four geographic locations along the U.S. Atlantic coast …
The Impact Of Conservation On The Status Of The World's Vertebrates, M Hoffmann, C Hilton-Taylor, A Angulo, M Bohm, Tm Brooks, Et Al.
The Impact Of Conservation On The Status Of The World's Vertebrates, M Hoffmann, C Hilton-Taylor, A Angulo, M Bohm, Tm Brooks, Et Al.
VIMS Articles
Using data for 25,780 species categorized on the International Union for Conservation of Nature Red List, we present an assessment of the status of the world's vertebrates. One-fifth of species are classified as Threatened, and we show that this figure is increasing: On average, 52 species of mammals, birds, and amphibians move one category closer to extinction each year. However, this overall pattern conceals the impact of conservation successes, and we show that the rate of deterioration would have been at least one-fifth again as much in the absence of these. Nonetheless, current conservation efforts remain insufficient to offset the …
Changes In Age Composition And Growth Characteristics Of Atlantic Sturgeon (Acipenser Oxyrinchus Oxyrinchus) Over 400 Years, Mt Balazik, Gc Garman, Ml Fine, Ch Hager, Sp Mcininch
Changes In Age Composition And Growth Characteristics Of Atlantic Sturgeon (Acipenser Oxyrinchus Oxyrinchus) Over 400 Years, Mt Balazik, Gc Garman, Ml Fine, Ch Hager, Sp Mcininch
VIMS Articles
Populations of sturgeon (Acipenseridae) have experienced global declines, and in some cases extirpation, during the past century. In the current era of climate change and over-harvesting of fishery resources, climate models, based on uncertain boundary conditions, are being used to predict future effects on the Earth's biota. A collection of approximately 400-year-old Atlantic sturgeon spines from a midden in colonial Jamestown, VA, USA, allowed us to compare the age structure and growth rate for a pre-industrial population during a 'mini-ice age' with samples collected from the modern population in the same reach of the James River. Compared with modern fish, …
Challenges Of Modeling Depth-Integrated Marine Primary Productivity Over Multiple Decades: A Case Study At Bats And Hot, Vs Saba, Mam Friedrichs, Me Carr, D Antoine, Ra Armstrong, Et Al.
Challenges Of Modeling Depth-Integrated Marine Primary Productivity Over Multiple Decades: A Case Study At Bats And Hot, Vs Saba, Mam Friedrichs, Me Carr, D Antoine, Ra Armstrong, Et Al.
VIMS Articles
The performance of 36 models (22 ocean color models and 14 biogeochemical ocean circulation models (BOGCMs)) that estimate depth-integrated marine net primary productivity (NPP) was assessed by comparing their output to in situ C-14 data at the Bermuda Atlantic Time series Study (BATS) and the Hawaii Ocean Time series (HOT) over nearly two decades. Specifically, skill was assessed based on the models' ability to estimate the observed mean, variability, and trends of NPP. At both sites, more than 90% of the models underestimated mean NPP, with the average bias of the BOGCMs being nearly twice that of the ocean color …
Dead In The Water: The Fate Of Copepod Carcasses In The York River Estuary, Virginia, Dt Elliott, Courtney K. Harris, Kw Tang
Dead In The Water: The Fate Of Copepod Carcasses In The York River Estuary, Virginia, Dt Elliott, Courtney K. Harris, Kw Tang
VIMS Articles
Using laboratory and field experiments we investigated three fates of copepod carcass organic matter in the York River estuary, Virginia: ingestion by planktivores (necrophagy), microbial decomposition, and removal by gravitational settling in the presence of turbulence (sinking). The ctenophore Mnemiopsis leidyi ingested live copepods and carcasses indiscriminately in feeding experiments. Microbial decomposition led to ca. 50% of carcass dry weight loss within 8 h after death. Carcass settling velocities in still water were ca. 0.1 cm s(-1), implying short residence time (hours) in the shallow estuary. However, turbulent mixing kept carcasses in suspension much of the time, reducing sinking losses. …
Reconstructing Early 17th Century Estuarine Drought Conditions From Jamestown Oysters, Jm Harding, Hj Spero, R Mann, Gs Herbert, Jl Sliko
Reconstructing Early 17th Century Estuarine Drought Conditions From Jamestown Oysters, Jm Harding, Hj Spero, R Mann, Gs Herbert, Jl Sliko
VIMS Articles
Oysters (Crassostrea virginica) were a central component of the Chesapeake Bay ecosystem in 1607 when European settlers established Jamestown, VA, the first permanent English settlement in North America. These estuarine bivalves were an important food resource during the early years of the James Fort (Jamestown) settlement while the colonists were struggling to survive in the face of inadequate supplies and a severe regional drought. Although oyster shells were discarded as trash after the oysters were eaten, the environmental and ecological data recorded in the bivalve geochemistry during shell deposition remain intact over centuries, thereby providing a unique window into conditions …
Observations Of Distribution, Size, And Sex Ratio Of Mature Blue Crabs, Callinectes Sapidus, From A Chesapeake Bay Tributary In Relation To Oyster Habitat And Environmental Factors, Jm Harding, R Mann
Observations Of Distribution, Size, And Sex Ratio Of Mature Blue Crabs, Callinectes Sapidus, From A Chesapeake Bay Tributary In Relation To Oyster Habitat And Environmental Factors, Jm Harding, R Mann
VIMS Articles
Blue crabs Callinectes sapidus (Rathbun, 1896) > 100 mm carapace width were sampled from a constructed oyster reef (1996 and 1997), a sand bar (1997) and a natural oyster bar (1997) in the Piankatank River, Chesapeake Bay, USA to describe habitat use, sex ratios, and demographics across a gradient of habitat types. Patterns of blue crab catch-per-unit-effort (CPUE), and demographics were similar on the oyster reef in 1996 and 1997. Average annual CPUE on the reef was 6-8 crabs pot(-1) with maximum CPUE of 15 crabs pot(-1). Daylength and water temperature significantly affected reef CPUE with more crabs observed in late …
Bacteria Dispersal By Hitchhiking On Zooplankton, Hp Grossart, C Dziallas, F Leunert, Kw Tang
Bacteria Dispersal By Hitchhiking On Zooplankton, Hp Grossart, C Dziallas, F Leunert, Kw Tang
VIMS Articles
Microorganisms and zooplankton are both important components of aquatic food webs. Although both inhabit the same environment, they are often regarded as separate functional units that are indirectly connected through nutrient cycling and trophic cascade. However, research on pathogenic and nonpathogenic bacteria has shown that direct association with zooplankton has significant influences on the bacteria's physiology and ecology. We used stratified migration columns to study vertical dispersal of hitchhiking bacteria through migrating zooplankton across a density gradient that was otherwise impenetrable for bacteria in both upward and downward directions (conveyor-belt hypothesis). The strength of our experiments is to permit quantitative …
An Expansion Of The Msvpa Approach For Quantifying Predator-Prey Interactions In Exploited Fish Communities, Lp Garrison, Js Link, Dp Kilduff, Md Cieri, B Maffley, Rj Latour, Et Al.
An Expansion Of The Msvpa Approach For Quantifying Predator-Prey Interactions In Exploited Fish Communities, Lp Garrison, Js Link, Dp Kilduff, Md Cieri, B Maffley, Rj Latour, Et Al.
VIMS Articles
Ecosystem-based fisheries management requires tools to place fish-stock dynamics in the broader context of fishery, predator, and competitive removals. Multispecies virtual population analysis (MSVPA) is an approach to quantifying predator prey interactions and estimating the rates of predation mortality for exploited fish populations. Here, an extended MSVPA (MSVPA-X) is presented as an alternative to existing MSVPA approaches. Notably, MSVPA-X uses index-tuned VPA methods, applies a more flexible feeding model, and includes an alternative functional feeding response. The MSVPA-X model is applied to a western Atlantic fish community, focusing on Atlantic menhaden and its major fish predators, and a sensitivity analysis …
Ulcerative Disease Outbreak In Crayfish Orconectes Propinquus Linked To Saprolegnia Australis In Big Muskellunge Lake, Wisconsin, L Krugner-Higby, D Haak, Ptj Johnson, Jeffrey D. Shields, Wm Jones, Kimberly S. Reece, Et Al.
Ulcerative Disease Outbreak In Crayfish Orconectes Propinquus Linked To Saprolegnia Australis In Big Muskellunge Lake, Wisconsin, L Krugner-Higby, D Haak, Ptj Johnson, Jeffrey D. Shields, Wm Jones, Kimberly S. Reece, Et Al.
VIMS Articles
Crayfish populations in the area of the North Temperate Lakes Long Term Ecological Research (LTER) project, Wisconsin, USA, have been monitored for >25 yr. In 2005, native crayfish Orconectes propinquus from Big Muskellunge Lake were found with ulcerated lesions in the cuticle In 2006, lesions occurred in 9 5% of sampled crayfish from the lake (n = 3146). Ulcers generally occurred on the appendages of affected individuals but varied in location and severity. The prevalence of ulcers varied widely among sites, sample depths, and sampling dates, ranging from 20% The prevalence of ulcers in crayfish increased from a minimum in …
Effluent Organic Nitrogen (Eon): Bioavailability And Photochemical And Salinity-Mediated Release, Da Bronk, Qn Roberts, Mp Sanderson, Ea Canuel, Pg Hatcher, Et Al.
Effluent Organic Nitrogen (Eon): Bioavailability And Photochemical And Salinity-Mediated Release, Da Bronk, Qn Roberts, Mp Sanderson, Ea Canuel, Pg Hatcher, Et Al.
VIMS Articles
The goal of this study was to investigate three potential ways that the soluble organic nitrogen (N) fraction of wastewater treatment plant (WWTP) effluents, termed effluent organic N (EON), could contribute to coastal eutrophication - direct biological removal, photochemical release of labile compounds, and salinity-mediated release of ammonium (NH4+). Effluents from two WWTPs were used in the experiments. For the bioassays, EON was added to water from four salinities (similar to 0 to 30) collected from the James River (VA) in August 2008, and then concentrations of N and phosphorus compounds were measured periodically over 48 h. Bioassay results, based …
The Strength Of B Cell Interaction With Antigen Determines The Degree Of Igm Polymerization, Jm Ye, Es Bromage, Sl Kaattari
The Strength Of B Cell Interaction With Antigen Determines The Degree Of Igm Polymerization, Jm Ye, Es Bromage, Sl Kaattari
VIMS Articles
The induction of variable disulfide polymerization of IgM in the trout (Oncorhynchus mykiss) and its effect on its half-life were examined. An association between greater Ab affinity and increased disulfide polymerization was first indicated by the observation of this increased IgM disulfide polymerization during the process of affinity maturation. A direct association between Ab affinity and disulfide polymerization was then established by the fractionation of individual sera into high- and low-affinity subpopulations, which also resulted in the partitioning of high and low degrees of disulfide polymerization. The ability of high-affinity B cells to produce more highly polymerized Abs upon Ag …
Subtle Biological Responses To Increased Co2 Concentrations By Phaeocystis Globosa Scherffel, A Harmful Algal Bloom Species, Y Wang, Wo Smith, Xd Wang, Ss Li
Subtle Biological Responses To Increased Co2 Concentrations By Phaeocystis Globosa Scherffel, A Harmful Algal Bloom Species, Y Wang, Wo Smith, Xd Wang, Ss Li
VIMS Articles
Recent investigations into the role of carbon dioxide on phytoplankton growth and composition have clearly shown differential effects among species and assemblages, suggesting that increases in oceanic CO2 may play a critical role in structuring lower trophic levels of marine systems in the future. Furthermore, alarming increases in the occurrence of harmful algal blooms (HABs) in coastal waters have been observed, and while not uniform among systems, appear in some manner to be linked to human impacts (eutrophication) on coastal systems. Models of HABs are in their infancy and do not at present include sophisticated biological effects or their environmental …
Kin Structure, Ecology And The Evolution Of Social Organization In Shrimp: A Comparative Analysis, Je Duffy, Ks Macdonald
Kin Structure, Ecology And The Evolution Of Social Organization In Shrimp: A Comparative Analysis, Je Duffy, Ks Macdonald
VIMS Articles
Eusocial societies present a Darwinian paradox, yet they have evolved independently in insects, mole-rats and symbiotic shrimp. Historically, eusociality has been thought to arise as a response to ecological challenges, mediated by kin selection, but the role of kin selection has recently been questioned. Here we use phylogenetically independent contrasts to test the association of eusociality with ecological performance and genetic structure (via life history) among 20 species of sponge-dwelling shrimp (Synalpheus) in Belize. Consistent with hypotheses that cooperative groups enjoy an advantage in challenging habitats, we show that eusocial species are more abundant, occupy more sponges and have broader …
Production Of Dissolved Organic Matter And Inorganic Nutrients By Gelatinous Zooplankton In The York River Estuary, Chesapeake Bay, Rh Condon, Dk Steinberg, Da Bronk
Production Of Dissolved Organic Matter And Inorganic Nutrients By Gelatinous Zooplankton In The York River Estuary, Chesapeake Bay, Rh Condon, Dk Steinberg, Da Bronk
VIMS Articles
Large "blooms" of ctenophores (Mnemiopsis leidyi) and scyphomedusae (Chrysaora quinquecirrha) occur throughout the York River, a sub-estuary of Chesapeake Bay. These gelatinous zooplankton blooms can influence carbon (C) and nutrient cycling through excretion of dissolved organic matter (DOM), and inorganic nitrogen (N) and phosphorus (P). We measured dissolved organic carbon, nitrogen and phosphorus (DOC, DON and DOP), ammonium (NH(4)(+)) and phosphate (PO(4)(3-)) released by M. leidyi and C. quinquecirrha in the laboratory, and estimated their contribution to in situ DOC and inorganic pools. Both species released high amounts of DOC compared with DON and DOP. DOM released by Mnemiopsis was …
Comparative Visual Function In Four Piscivorous Fishes Inhabiting Chesapeake Bay, Az Horodysky, Rw Brill, Ej Warrant, Ja Musick, Rj Latour
Comparative Visual Function In Four Piscivorous Fishes Inhabiting Chesapeake Bay, Az Horodysky, Rw Brill, Ej Warrant, Ja Musick, Rj Latour
VIMS Articles
Maintaining optimal visual performance is a difficult task in photodynamic coastal and estuarine waters because of the unavoidable tradeoffs between luminous sensitivity and spatial and temporal resolution, yet the visual systems of coastal piscivores remain understudied despite differences in their ecomorphology and microhabitat use. We therefore used electroretinographic techniques to describe the light sensitivities, temporal properties and spectral sensitivities of the visual systems of four piscivorous fishes common to coastal and estuarine waters of the western North Atlantic: striped bass (Morone saxatilis), bluefish (Pomatomus saltatrix), summer flounder (Paralichthys dentatus) and cobia (Rachycentron canadum). Benthic summer flounder exhibited higher luminous sensitivity …
Nitrogen Uptake By Phytoplankton And Bacteria During An Induced Phaeocystis Pouchetii Bloom, Measured Using Size Fractionation And Flow Cytometric Sorting, Pb Bradley, Mp Sanderson, Jc Nejstgaard, Af Sazhin, Me Frischer, Lm Killberg-Thoreson, Pg Verity, L Campbell, Da Bronk
Nitrogen Uptake By Phytoplankton And Bacteria During An Induced Phaeocystis Pouchetii Bloom, Measured Using Size Fractionation And Flow Cytometric Sorting, Pb Bradley, Mp Sanderson, Jc Nejstgaard, Af Sazhin, Me Frischer, Lm Killberg-Thoreson, Pg Verity, L Campbell, Da Bronk
VIMS Articles
Uptake of inorganic and organic nitrogen (N) by phytoplankton and bacteria was investigated during a mesocosm study conducted in Raunefjord, Norway in April 2005. One mesocosm was fertilized with nitrate and phosphate at a ratio of 16:1 and maintained in the light, while one unamended light mesocosm served as a control. Dissolved nutrients, phytoplankton and bacterial biomass, and phytoplankton community composition were monitored throughout the 26 d experiment. Uptake of (15)N-labeled ammonium and nitrate, and dual-labeled ((15)N and (13)C) urea and dissolved free amino acids (DFAA) was measured for phytoplankton and bacteria using 2 methods: size fractionation into 0.2-0.8 and …
Linkage Between Crustacean Zooplankton And Aquatic Bacteria, Kw Tang, V Turk, Hp Grossart
Linkage Between Crustacean Zooplankton And Aquatic Bacteria, Kw Tang, V Turk, Hp Grossart
VIMS Articles
Bacteria and metazoan zooplankton (mainly crustaceans) are often viewed as 2 separate functional groups in the pelagic food webs indirectly linked via nutrient cycling and trophic cascades. Yet a zooplankter's body carries a high abundance of diverse bacteria, often at an equivalent concentration orders of magnitude higher than the ambient bacterial concentration. Zooplankton bodies are organic-rich micro-environments that support fast bacterial growth. Their physical-chemical conditions differ from those in the surrounding water and therefore select for different bacterial communities, including anaerobic bacteria that otherwise may not thrive in a well-oxygenated water column. The zooplankton body provides protection to the associated …
Asymmetric Conservation Benefits Of Circle Hooks In Multispecies Billfish Recreational Fisheries: A Synthesis Of Hook Performance And Analysis Of Blue Marlin (Makaira Nigricans) Postrelease Survival, John E. Graves, Andrij Z. Horodysky
Asymmetric Conservation Benefits Of Circle Hooks In Multispecies Billfish Recreational Fisheries: A Synthesis Of Hook Performance And Analysis Of Blue Marlin (Makaira Nigricans) Postrelease Survival, John E. Graves, Andrij Z. Horodysky
VIMS Articles
We evaluated the conservation benefits of the use of circle hooks compared with standard J hooks in the recreational fishery for Atlantic istiophorid billfishes, noting hooking location and the presence of trauma (bleeding) for 123 blue marlin (Makaira nigricans), 272 white marlin (Kajikia albida), and 132 sailfish (Istiophorus platypterus) caught on natural baits rigged with one of the two hook types. In addition, we used pop-up satellite archival tags (PSATs) to follow the fate of 61 blue marlin caught on natural baits rigged with circle hooks or on a combination of artificial lure and natural bait rigged with J hooks. …
Observations Of Blue Crabs (Callinectes Sapidus, Rathbun 1896) On Shell Bar Oyster Reef, Great Wicomico River, Virginia, Juliana Harding, Melissa Southworth, Roger L. Mann
Observations Of Blue Crabs (Callinectes Sapidus, Rathbun 1896) On Shell Bar Oyster Reef, Great Wicomico River, Virginia, Juliana Harding, Melissa Southworth, Roger L. Mann
VIMS Articles
Blue crabs (Callinectes sapidus, Rathbun 1896) were sampled with commercial crab pots on Shell Bar oyster reef in the Great Wicomico River, VA, from May through October during 2006 and 2007. Weekly catch per unit effort (CPUE), sex ratio, and size (carapace width, measured in millimeters) were evaluated in the context of water temperature (measured in degrees Celsius), salinity, and daylength (measured in hours) conditions on the reef. The total number of crabs collected in 2006 and 2007 was 5,221 and 3,303, respectively. Blue crab CPU E was highest from mid-June through mid-September at water temperatures at or more than …
Bycatch Reduction Device Conserves Diamondback Terrapin Without Affecting Catch Of Blue Crab, Megan A. Rook, Rn Lipcius, Bret M. Bronner, Randolph Chambers
Bycatch Reduction Device Conserves Diamondback Terrapin Without Affecting Catch Of Blue Crab, Megan A. Rook, Rn Lipcius, Bret M. Bronner, Randolph Chambers
VIMS Articles
Bycatch mortality of non-target species in fisheries is a major threat to the conservation and restoration of marine and estuarine species. Attempts to reduce bycatch by fitting fishing gear with excluder devices have typically been met with resistance due to reductions in catch of target species. We examined the possibility that conservation and fishery goals could be met simultaneously. In lower Chesapeake Bay, we tested a mechanism for reducing bycatch of diamondback terrapin Malaclemys terrapin in blue-crab traps without affecting crab catch. Over 23 sampling dates during summer 2008, we compared terrapin captures at 2 shallow-water sites typical of recreational …
High Particle Export Over The Continental Shelf Of The West Antarctic Peninsula, Ko Buesseler, Amp Mcdonnell, Ome Schofield, Dk Steinberg, Hw Ducklow
High Particle Export Over The Continental Shelf Of The West Antarctic Peninsula, Ko Buesseler, Amp Mcdonnell, Ome Schofield, Dk Steinberg, Hw Ducklow
VIMS Articles
Drifting cylindrical traps and the flux proxy Th-234 indicate more than an order of magnitude higher sinking fluxes of particulate carbon and Th-234 in January 2009 than measured by a time-series conical trap used regularly on the shelf of the west Antarctic Peninsula (WAP). The higher fluxes measured in this study have several implications for our understanding of the WAP ecosystem. Larger sinking fluxes result in a revised export efficiency of at least 10% (C flux/net primary production) and a requisite lower regeneration efficiency in surface waters. High fluxes also result in a large supply of sinking organic matter to …
Quantitative Pcr Assay For Mycobacterium Pseudoshottsii And Mycobacterium Shottsii And Application To Environmental Samples And Fishes From The Chesapeake Bay, Dt Gauthier, Kimberly S. Reece, J Xiao, Mw Rhodes, Hi Kator, Rj Latour, C F. Bonzek, J Hoenig, W. K. Vogelbein
Quantitative Pcr Assay For Mycobacterium Pseudoshottsii And Mycobacterium Shottsii And Application To Environmental Samples And Fishes From The Chesapeake Bay, Dt Gauthier, Kimberly S. Reece, J Xiao, Mw Rhodes, Hi Kator, Rj Latour, C F. Bonzek, J Hoenig, W. K. Vogelbein
VIMS Articles
Striped bass (Morone saxatilis) in the Chesapeake Bay are currently experiencing a very high prevalence of mycobacteriosis associated with newly described Mycobacterium species, Mycobacterium pseudoshottsii and M. shottsii. The ecology of these mycobacteria outside the striped bass host is currently unknown. In this work, we developed quantitative real-time PCR assays for M. pseudoshottsii and M. shottsii and applied these assays to DNA extracts from Chesapeake Bay water and sediment samples, as well as to tissues from two dominant prey of striped bass, Atlantic menhaden (Brevoortia tyrannus) and bay anchovy (Anchoa mitchilli). Mycobacterium pseudoshottsii was found to be ubiquitous in water …
Science-To-Management Pathways In Us Atlantic Herring Management: Using Governance Network Structure And Function To Track Information Flow And Potential Influence, Troy W. Hartley, C Glass
Science-To-Management Pathways In Us Atlantic Herring Management: Using Governance Network Structure And Function To Track Information Flow And Potential Influence, Troy W. Hartley, C Glass
VIMS Articles
Hartley, T. W., and Glass, C. 2010. Science-to-management pathways in US Atlantic herring management: using governance network structure and function to track information flow and potential influence. - ICES Journal of Marine Science, 67: 1154-1163. Atlantic herring (Clupea harengus) are crucial members of the ecosystem and economy of the Northwest Atlantic, and a challenging species for management, which in the United States is a multistakeholder process, involving commercial and recreational fishing interests, conservation organizations, state and federal governments, and other interested parties. Given the large number of stakeholders, fisheries management has been conceptualized as a governance network, through which multiple …