Open Access. Powered by Scholars. Published by Universities.®

Aquaculture and Fisheries Commons

Open Access. Powered by Scholars. Published by Universities.®

Articles 1 - 11 of 11

Full-Text Articles in Aquaculture and Fisheries

Biodiversity Of Bear Seamount, New England Seamount Chain: Results Of Exploratory Trawling, Ja Moore, M Vecchione, R Gibbons, Jk Galbraith, M Turnipseed, M Southworth, E Watkins Sep 2003

Biodiversity Of Bear Seamount, New England Seamount Chain: Results Of Exploratory Trawling, Ja Moore, M Vecchione, R Gibbons, Jk Galbraith, M Turnipseed, M Southworth, E Watkins

VIMS Articles

Bear Seamount (39°55′N 67°30′W) is an extinct undersea volcano located inside the U.S. Exclusive Economic Zone south of Georges Bank. The fauna associated with the seamount was little known until twenty trawl stations were made 2-7 December 2000, by the NOAA ship R/V Delaware II. The objective of the survey was to begin to document the biodiversity on and over the seamount, particularly of fishes, cephalopods, and crustaceans. Representatives of most species were preserved as vouchers and for subsequent definitive identification. This report presents a description of the biodiversity. A total of at least 274 species were collected. Preliminary identifications …


Influence Of Habitat On Diet And Distribution Of Striped Bass (Morone Saxatilis) In A Temperate Estuary, Jm Harding, Roger L. Mann May 2003

Influence Of Habitat On Diet And Distribution Of Striped Bass (Morone Saxatilis) In A Temperate Estuary, Jm Harding, Roger L. Mann

VIMS Articles

Striped bass (Morone saxatilis) are recreationally and commercially valuable finfish along the Atlantic seaboard of North America including the Chesapeake Bay estuary. Habitat use patterns for striped bass in relation to biogenic habitat types in Chesapeake Bay tributaries are poorly described although it is widely acknowledged that these piscivorous fishes use estuarine habitat for nursery and feeding grounds during development. Striped bass diet and distribution patterns were examined in relation to a gradient of biogenic habitats ranging from complex three-dimensional oyster reef through flat oyster bar to sand bottom habitat in the Piankatank River, Virginia. Striped bass were more abundant …


Spatial Dynamics And Value Of A Marine Protected Area And Corridor For The Blue Crab Spawning Stock In Chesapeake Bay, Rom Lipcius, Wt Stockhausen, Rochelle D. Seitz, Pj Geer Mar 2003

Spatial Dynamics And Value Of A Marine Protected Area And Corridor For The Blue Crab Spawning Stock In Chesapeake Bay, Rom Lipcius, Wt Stockhausen, Rochelle D. Seitz, Pj Geer

VIMS Articles

In lower Chesapeake Bay, a 172,235 ha marine protected area and corridor (MPAC) was recently established to protect blue crab adult females either en route to or at the spawning grounds during the reproductive period. The MPAC was justified due to a recent substantial decline in spawning stock biomass. It was situated in waters deeper than 10 in throughout the lower bay due to the high abundances of adult females in this zone, and it was an expansion of a historical spawning sanctuary near the bay mouth to include northward extensions (upper and lower MPACs). We examined spatial dynamics of …


Research Priorities For Diseases Of The Blue Crab Callinectes Sapidus, Jeffrey D. Shields Mar 2003

Research Priorities For Diseases Of The Blue Crab Callinectes Sapidus, Jeffrey D. Shields

VIMS Articles

The diseases of blue crabs have received relatively little attention compared to those of the American oyster, Crassostrea virginica, or the penaeid shrimps, Penaeus spp. This is primarily due to differences in resource management (fishery vs. aquaculture), and the magnitude of financial losses suffered by the industries from protozoal diseases in oysters and viral diseases in shrimp, respectively. Nonetheless, several agents including Vibrio spp., Hematodinium perezi, Paramoeba perniciosa, Ameson michaelis and Loxothylacus texanus are highly pathogenic in blue crabs, and have the capacity to severely damage certain segments of the crab population. This paper is meant to highlight priorities for …


Potential Bottom-Up Control Of Blue Crab Distribution At Various Spatial Scales, Rochelle D. Seitz, R. Lipcius, Wt Stockhausen, Et Al Mar 2003

Potential Bottom-Up Control Of Blue Crab Distribution At Various Spatial Scales, Rochelle D. Seitz, R. Lipcius, Wt Stockhausen, Et Al

VIMS Articles

Top-down (i.e., predation), bottom-up (i.e., food availability), and physical factors may influence blue crab (Callinectes sapidus) distribution. To assess the role of bottom-up and physical process in blue crab distributions, we concurrently measured density of the blue crab (Callinectes sapidus), density of its principal prey, the Baltic clam (Macoma balthica), and physical characteristics in mud and sand habitats spanning various spatial scales (1-10 km and 10-50 km) in the York River, Chesapeake Bay. Clam and crab densities were intermediate in mud, low in downriver sand, and high in upriver sand. Clam and crab densities were not correlated in mud. whereas …


Simulated Effects Of Seagrass Loss And Restoration On Settlement And Recruitment Of Blue Crab Postlarvae And Juveniles In The York River, Chesapeake Bay, Wt Stockhausen, Rom Lipcius Mar 2003

Simulated Effects Of Seagrass Loss And Restoration On Settlement And Recruitment Of Blue Crab Postlarvae And Juveniles In The York River, Chesapeake Bay, Wt Stockhausen, Rom Lipcius

VIMS Articles

Seagrass meadows provide important settlement habitat, food and refuge for postlarvae and young juveniles of the blue crab, Callinectes sapidus. In the York River, Chesapeake Bay, area] cover and distribution of seagrass beds has declined historically. Beds which existed 12-25 km upriver from the mouth disappeared and have not recovered. A model for planktonic postlarval behavior, coupled with a 3-dimensional hydrodynamic transport model for the York River, was used to investigate potential effects of the decline in seagrass abundance, and hypothetical restoration, on blue crab settlement and recruitment to the benthos, both in seagrass and to unvegetated bottom. Effects of …


Aspects Of The Pathophysiology Of Blue Crabs, Callinectes Sapidus, Infected With The Parasitic Dinoflagellate Hematodinium Perezi, Jeffrey D. Shields, C Scanlon, A Volety Mar 2003

Aspects Of The Pathophysiology Of Blue Crabs, Callinectes Sapidus, Infected With The Parasitic Dinoflagellate Hematodinium Perezi, Jeffrey D. Shields, C Scanlon, A Volety

VIMS Articles

Blue crabs, Callinectes sapidus, infected with Hematodinium perezi frequently show signs of weakness and lethargy and die when stressed by handling or capture. Radical changes to the hemolymph of heavily infected crabs are obvious by reduced clotting ability, discoloration. and a 50% to 70% decline in total hemocyte density. Few other signs of infection are associated with infections and the resulting mortalities of blue crabs. To assay physiological changes in infected crabs, we measured serum proteins, hemocyanin, serum acid phosphatase, various hemolymph enzymes, hernagglutination activity, and tissue glycogen levels in relation to intensity of infection with H. perezi. Serum proteins …


Bioenergetic Modeling Of The Blue Crab (Callinectes Sapidus) Using The Fish Bioenergetics (3.0) Computer Program, Bj Brylawski, Tj Miller Mar 2003

Bioenergetic Modeling Of The Blue Crab (Callinectes Sapidus) Using The Fish Bioenergetics (3.0) Computer Program, Bj Brylawski, Tj Miller

VIMS Articles

To understand better the ecology and growth dynamics of the blue crab (Callinectes sapidus). we developed a bioenergetic model based upon the Fish Bioenergetics 3.0 computer program. We summarized and analyzed existing data from published studies on the ecology and physiology of both blue crab and closely related species to parameterize the model. The respiration and excretion components were estimated directly from published studies. Parts of the consumption component were estimated indirectly. The resulting model was evaluated for applicability against known growth trajectories from field and laboratory studies. The model predicted observed growth and consumption to a first approximation. Inspection …


Mycobacterium Shottsii Sp Nov., A Slowly Growing Species Isolated From Chesapeake Bay Striped Bass (Morone Saxatilis), Mw Rhodes, H Kator, S Kotob, P Van Berkum, I Kaattari, Wolfgang K. Vogelbein, Et Al Mar 2003

Mycobacterium Shottsii Sp Nov., A Slowly Growing Species Isolated From Chesapeake Bay Striped Bass (Morone Saxatilis), Mw Rhodes, H Kator, S Kotob, P Van Berkum, I Kaattari, Wolfgang K. Vogelbein, Et Al

VIMS Articles

Slowly growing, non-pigmented mycobacteria were isolated from striped bass (Morone saxatilis) during an epizootic of mycobacteriosis in the Chesapeake Bay. Growth characteristics, acid-fastness and results of 16S rRNA gene sequencing were consistent with those of the genus Mycobacterium. A unique profile of biochemical reactions was observed among the 21 isolates. A single cluster of eight peaks identified by analysis of mycolic acids (HPLC) resembled those of reference patterns but differed in peak elution times from profiles of reference species of the Mycobacterium tuberculosis complex. One isolate (M175(T)) was placed within the slowly growing mycobacteria by analysis of aligned 16S rRNA …


Validation Of Presumed Annual Marks On Sectioned Otoliths Of Spotted Seatrout, Cynoscion Nebulosus, In The Chesapeake Bay Region, Tf Idhe, Me Chittenden Jan 2003

Validation Of Presumed Annual Marks On Sectioned Otoliths Of Spotted Seatrout, Cynoscion Nebulosus, In The Chesapeake Bay Region, Tf Idhe, Me Chittenden

VIMS Articles

Annual otolith incremnet deposition has not been validated for spotted seatrout populations north of Florida. To validate the marks on sectioned otoliths of Chesapeake Bay spotted seatrout, a size-stratified subsample (n = 683) was randomly selected from a total of 2763 fish collected from June 1996 to March 1999. Monthly marginal increment frequency plots and monthly frequency of 0 marginal increment plots showed that presumed annual marks-interpreted as the distal edge of the translucent margin-formed once a year, during March and April, thus validating the sectioned otolith method in spotted seatrout of ages 1-5 for the Chesapeake Bay region.


Perkinsus Sp Infection Risk For Manila Clams, Venerupis Philippinarum (A. Adams And Reeve, 1850) On The Pacific Coast Of North And Central America, Ra Elston, Cf Dungan, Tr Meyers, Kimberly S. Reece Jan 2003

Perkinsus Sp Infection Risk For Manila Clams, Venerupis Philippinarum (A. Adams And Reeve, 1850) On The Pacific Coast Of North And Central America, Ra Elston, Cf Dungan, Tr Meyers, Kimberly S. Reece

VIMS Articles

Manila clams (Venerupis philippinarum, A. Adams and Reeve 1850) are an important aquaculture species on the west coast of North America and are also cultured in Europe, Asia, and other locations. Clams cultured on the west coast of North America are free of Perkinsus sp. infections, while clams from certain Asian and European sources are infected. Infection in Korean Manila clams is reportedly associated with high morbidity and mortality. We evaluated the health status of readily accessible Manila clam juveniles from Korea that were proposed for importation into Mexican waters where they would increase in size, and then be shipped …