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Articles 271 - 300 of 325
Full-Text Articles in Aquaculture and Fisheries
Status Of The Major Oyster Diseases In Virginia 2000 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 2000 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
As a consequence of the relatively warm temperatures, high salinities, and high oyster parasite abundances in the fall of 1999, both P. marinus and H. nelsoni were widely distributed throughout oyster populations in Virginia in 2000. Fortunately, however, we did not see severe epizootics of the diseases as observed in some areas in 1999.
Distribution And Impact Of The Oyster Parasite Bonamia Ostreae In Maine, And Its Detection Using Dna Probes, Ryan Carnegie
Distribution And Impact Of The Oyster Parasite Bonamia Ostreae In Maine, And Its Detection Using Dna Probes, Ryan Carnegie
Electronic Theses and Dissertations
Health management efforts in Maine related to the flat oyster (Ostrea edulis) parasite Bonamia ostreae are limited by a lack of knowledge of the parasite’s distribution and impact in both wild and cultured populations. This information would be more readily obtainable with improved diagnostic tools. The objectives of this dissertation were to design sensitive and specific DNA probes for detection of B. ostreae; to assess the prevalence and intensity of parasite infections in wild oyster populations in Maine; and to evaluate growth and mortality of cultured oysters in the Damariscotta River, where B. ostreae is enzootic. A polymerase …
Status Of The Major Oyster Diseases In Virginia 1999 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1999 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
As a consequence of the relatively warm temperatures and high salinities severe epizootics of both H. nelsoni and P. marinus occurred in most tributaries in VA. In the upper James River, VA prevalences and intensities of P. marinus were the highest on record. The proportion of advanced infections (moderate and heavy intensity) in October was 60% at Wreck Shoal and 48% at Horsehead Rock suggesting that significant oyster mortalities occurred in these areas. 1 Record high levels of P. marinus were also observed in Virginia's other major tributaries. Of the 39 bay oyster populations surveyed in the fall, P. marinus …
Syncoelium Vermilionensis Sp. N., (Hemiuroidea: Syncoeliidae) And New Records For Members Of Azygiidae, Ptychogonimidae, And Syncoeliidae Parasitizing Elasmobranchs In The Gulf Of California, Stephen S. Curran, Robin M. Overstreet
Syncoelium Vermilionensis Sp. N., (Hemiuroidea: Syncoeliidae) And New Records For Members Of Azygiidae, Ptychogonimidae, And Syncoeliidae Parasitizing Elasmobranchs In The Gulf Of California, Stephen S. Curran, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
During July-September 1993 and May 1996, a survey of the metazoan parasites of 817 elasmobranchs from the Gulf of California, representing 42 species, was conducted at 14 sites along the western portion of the Gulf of California. Elasmobranchs were obtained from local commercial fishers. In this paper, we report all digeneans collected during the survey, excluding the gorgoderids, which will be presented in a subsequent paper. Four species from three hemiuroid families were collected, none of which was known previously from the Gulf of California. Syncoelium vermilionensis sp. n. (Syncoeliidae), a species that differs most notably from its congeners by …
Status Of The Major Oyster Diseases In Virginia 1998 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1998 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
No abstract provided.
Potential Role Of Protease-Antiprotease Interactions In Perkinsus Marinus Infection In Crassostrea Spp., M Faisal, Jl Oliver, Sl Kaataari
Potential Role Of Protease-Antiprotease Interactions In Perkinsus Marinus Infection In Crassostrea Spp., M Faisal, Jl Oliver, Sl Kaataari
VIMS Articles
Perkinsus marinus causes devastating losses in populations of the eastern oyster (Crassostrea virginica). Our studies have demonstrated that P. marinus secretes extracellular serine proteases which enhance parasite propagation and compromise host defences. Crassostrea virginica. however, possesses several inhibitors of these proteases. The Pacific oyster (C. gigas) is resistant to P. marinus and possesses protease inhibitors with significantly higher specific activities than those in C. virginica. Interestingly, Crassostrea spp. themselves, elaborate metalloprotease activities which can be detected in their plasma, and are increased during P. marinus infections. Together our work suggests that there may be a broad spectrum of humoral host …
Infectious Necrotizing Enteritis And Mortality Caused By Vibrio Carachariae In Summer Flounder Paralichthys Dentatus During Intensive Culture, Bruno Soffientino, Todd Gwaltney, David R. Nelson, Jennifer L. Specker, Michael Mauel, Marta Gomez-Chiarri
Infectious Necrotizing Enteritis And Mortality Caused By Vibrio Carachariae In Summer Flounder Paralichthys Dentatus During Intensive Culture, Bruno Soffientino, Todd Gwaltney, David R. Nelson, Jennifer L. Specker, Michael Mauel, Marta Gomez-Chiarri
Fisheries, Animal and Veterinary Sciences Faculty Publications
An epizootic causing mortality among cultured summer flounder Paralichthys dentatus occurred in summer of 1998 at a land-based facility on Narragansett Bay, Rhode Island, USA. The disease, flounder infectious necrotizing enteritis (FINE), was characterized by reddening around the anal area, distended abdomens filled with opaque serosanguineous fluid, enteritis and necrosis of the posterior intestine. In extreme cases of the disease, the posterior intestine was detached from the anus and was observed coming out the vent. The intestine of individuals that recovered from the dsease ended in a blind-sac; the abdomens of these fish were distended, due to food and water …
Environmental Factors And The Infectious Disease Caused By The Protozoan Parasite, Perkinsus Marinus, In Eastern Oysters (Crassostrea Virginica), Fle Chu
VIMS Articles
Temperature and salinity are two important factors limiting the distribution and abundance of Perkinsus marinus, a protozoan parasite of Eastern oysters (Crassostrea virginica). Results of laboratory studies ale consistent with field observations and clearly demonstrate that P. marinus susceptibility and disease advancement are positively correlated with temperature, salinity and in situ number of infective cells. Laboratory findings also suggest that environmental degradation may enhance the epizootic, although disease caused by P. marinus in oysters is known to be predominantly exacerbated by elevated temperature and salinity. Oysters cellular defence mechanisms appear ineffective in defence against P. marinus. Also, pollutant esposure caused …
Histopathological Alterations Associated With Perkinsus Spp. Infection In The Softshell Clam Mya Arenaria, Sm Mclaughlin, M Faisal
Histopathological Alterations Associated With Perkinsus Spp. Infection In The Softshell Clam Mya Arenaria, Sm Mclaughlin, M Faisal
VIMS Articles
Softshell clams (Mya arenaria) collected from the Chester River in the upper Chesapeake Bay showed the presence of Perkinsus spp, in similar to 12 % (28/240) Of clams examined. The infection seems to run a mild course with the host prevailing in encapsulating invading parasites. The gills appear to be the major site of infection, however, the parasite was also found in the digestive gland, gonads, and kidneys and occasionally in the tissue and sinuses of adductor muscles. Typically, clusters of protozoal cells were embedded in on amorphous PAS-positive substrate and were surrounded by one or more layers of granulocytes. …
Status Of The Major Oyster Diseases In Virginia 1997 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1997 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
No abstract provided.
In Vitro Propagation Of Two Perkinsus Species From The Softshell Clam Mya Arenaria, Sm Mclaughlin, M Faisal
In Vitro Propagation Of Two Perkinsus Species From The Softshell Clam Mya Arenaria, Sm Mclaughlin, M Faisal
VIMS Articles
Two continuous, axenic cultures of Perkinsus spp. (H49 and G117)were obtained from the softshell clam Mya arenaria collected from Swan Point in the Chester River, Chesapeake Bay (Maryland).
Isolate H49 was obtained from the hemolymph of a heavily infected clam. Except for their larger size, H49 trophozoites and schizonts exhibited the characteristic morphology of Perkinsus marinus and divided by schizogony. Isolate G117 was obtained from a combined gill/palp sample of a moderately infected clam. Unlike H49, vegetative forms (trophozoites and schizonts) of G117 were present along with prezoosporulation stages in the same culture. In culture, G117 cells multiplied by both …
Status Of The Major Oyster Diseases In Virginia 1996 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1996 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia 1995 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1995 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
No abstract provided.
A Survey Of Disease In The Oyster Crassostrea Virginica (Gmelin, 1791) In Rhode Island Coastal Estuaries, Retno Andamari, Michael A. Rice, Paul P. Yevich
A Survey Of Disease In The Oyster Crassostrea Virginica (Gmelin, 1791) In Rhode Island Coastal Estuaries, Retno Andamari, Michael A. Rice, Paul P. Yevich
Michael A Rice
The presence of potential pathogens and lesions in American oysters, Crassostrea virginica (Gmelin, 1791), from coastal estuaries in Rhode Island was studied. Oysters were collected by hand or tongs from three stations in the Pawcatuck River, two stations in Narrow River, three stations in Charlestown Pond, and three stations in Green Hill Pond, during July/August 1991, November 1991, March 1992, and May 1992. Oysters were processed for histologic examination and determination of condition index. MSX, Haplosporidium nelsoni (Haskin, Stauber et Mackin, 1966), was detected in four of 480 oysters (0.8%); Sphenophyra sp., 15 of 480 (3.1%); Bucephalus sp. 16of 480 …
Status Of The Major Oyster Diseases In Virginia 1994 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1994 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
No abstract provided.
Description Of A New Blood-Fluke, Cruoricola Lates N. G., N. Sp. (Digenea: Sanguinicolidae), From Sea-Bass Lates Calcarifer (Bloch, 1790) (Centropomidae), Brett W. Herbert, Faizah M. Shaharom-Harrison, Robin M. Overstreet
Description Of A New Blood-Fluke, Cruoricola Lates N. G., N. Sp. (Digenea: Sanguinicolidae), From Sea-Bass Lates Calcarifer (Bloch, 1790) (Centropomidae), Brett W. Herbert, Faizah M. Shaharom-Harrison, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
A new blood-fluke, Cruoricola lates n. g., n. sp., is described from sea-bass Lates calcarifer cultured in Malaysia. It is also found in Thailand and Australia. All fish examined over 15 cm in length were infected in the type-locality. This sanguinicolid is differentiated from other genera by the spherical seminal vesicle; the large, single testis extending beyond the intestinal caeca; the medial, bi-lobed ovary; and the single column of submarginal, laterally directed, evenly spaced spines. It has separate genital pores which are close together. Adults are found predominantly in the mesenteric venules of the venous circulation. Juveniles are commonest in …
Status Of The Major Oyster Diseases In Virginia 1993 A Summary Of The Annual Monitoring Program, Eugene M. Burreson, Lisa M. Ragone Calvo
Status Of The Major Oyster Diseases In Virginia 1993 A Summary Of The Annual Monitoring Program, Eugene M. Burreson, Lisa M. Ragone Calvo
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia 1992 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1992 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Reports
No abstract provided.
Environmental Control Of Perkinsus Marinus And Elucidation Of Over Wintering Infections : Final Report, Eugene M. Burreson, Lisa M. Ragone Calvo
Environmental Control Of Perkinsus Marinus And Elucidation Of Over Wintering Infections : Final Report, Eugene M. Burreson, Lisa M. Ragone Calvo
Reports
The role of low temperature and low salinity in controlling P. marinus was investigated under laboratory conditions which simulated typical and extreme winter and spring environmental conditions.
Status Of The Major Oyster Diseases In Virginia 1991 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1991 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia 1990 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1990 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Reports
No abstract provided.
Lists Of Larval Worms From Marine Invertebrates Of The Pacific Coast Of North America, Hilda Lei Ching
Lists Of Larval Worms From Marine Invertebrates Of The Pacific Coast Of North America, Hilda Lei Ching
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Immature stages of seventy-three digenetic trematodes are listed by their families, marine invertebrate hosts, and localities and then cross listed according to their molluscan hosts. The list contains many new host records, and larval stages of fifteen digenetic trematodes were newly recorded from gastropods from British Columbia and California. A list of immature stages of fourteen cestodes, acanthocephaIans, and nematodes is also included.
Diseases Of Mahi Mahi Or Common Dolphin Fish, Coryphaena Hippurus In Australia, Jeremy S. Langdon
Diseases Of Mahi Mahi Or Common Dolphin Fish, Coryphaena Hippurus In Australia, Jeremy S. Langdon
Fisheries research bulletins
The diseases encountered in mahi mahi, Coryphaena hippurus, in a land-based hatchery, grow-out sea-cages, and from wild populations between 1987 and 1990 were predominately due to protozoan and metazoan parasites. "Milky flesh", or flesh liquefaction post-mortem, due to Kudoa thyrsites, Trichodina gill infections, and eye lesions induced by Benedenia were the most serious infectious diseases of cultured fish. Bacterial diseases were limited to secondary opportunistic infections and fin "rot", and no fungal or viral conditions were detected. Non-infectious diseases included vitamin E deficiency in fry, lateral canal erosions, and miscellaneous dietary and therapeutic toxicities.
Status Of The Major Oyster Diseases In Virginia 1989 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1989 A Summary Of The Annual Monitoring Program, Eugene M. Burreson
Reports
No abstract provided.
Some Helminth Parasites Of Dunlin (Calidris Alpina) And Western Willet (Catoptrophorus Semipalmatus Inornatus) From California, Hilda Lei Ching
Some Helminth Parasites Of Dunlin (Calidris Alpina) And Western Willet (Catoptrophorus Semipalmatus Inornatus) From California, Hilda Lei Ching
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Dunlins and western willets were collected on their winter feeding grounds at Bodega Bay and Bolinas Lagoon, California, during 1986. Six digeneans, eight cestodes, two acanthocephalans, and a new nematode were found in dunlins. Seven digeneans, two cestodes, one acanthocephalan, and the new nematode were found in western willets; four helminths including the new roundworm were common to dunlins. Thominx cecumitis sp. n. differs from other capillarid nematodes with a spinous spicule-sheath in having a short, globular vulvar appendage, peanut-shapcd eggs, a cuticular ball at the posterior tip of the body, narrow lateral alae, and a cuticular genital bursa.
Prevalence Of The Major Oyster Diseases In Virginia Waters 1988 A Summary Of The Annual Monitoring Program., Eugene M. Burreson
Prevalence Of The Major Oyster Diseases In Virginia Waters 1988 A Summary Of The Annual Monitoring Program., Eugene M. Burreson
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia 1988, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 1988, Eugene M. Burreson
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia, Eugene M. Burreson
Reports
No abstract provided.
Status Of The Major Oyster Diseases In Virginia, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia, Eugene M. Burreson
Reports
No abstract provided.
A Checklist Of Parasites Of California, Oregon, And Washington Marine And Estuarine Fishes, Milton S. Love, Mike Moser
A Checklist Of Parasites Of California, Oregon, And Washington Marine And Estuarine Fishes, Milton S. Love, Mike Moser
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
This report is a summary of the published records of parasites found from the marine and estuarine fishes of California, Oregon, and Washington. Coverage has not been limited to the western United States, but rather includes parasite reports from throughout each fish's range. Included is a host-parasite list and parasite-host cross index.
We have produced this survey because we felt there was a need for a single source which would list all the parasites infecting marine and estuarine fish from California, Oregon, and Washington. Pertinent sources are scattered over a number of journals, covering many years. Workers find it time …