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| Registros recuperados: 23 | |
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| Beckensteiner, Jennifer; Kaplan, David; Scheld, Andrew M.. |
| The eastern oyster once provided major societal and ecosystem benefits, but these benefits have been threatened in recent decades by large declines in oyster harvests. In many areas, recovery of oyster aquaculture faces significant societal opposition and spatial constraints limiting its ability to meet expectations regarding future food needs and provision of ecosystem services. In Virginia, oyster aquaculture has begun to expand, concurrent with an increase in subaqueous leased areas (over 130,000 acres of grounds are currently leased). Though private leases must in theory be used for oyster production, in practice, they can be held for other reasons, such as speculation or intentional exclusion of others. These factors have led to large variation over... |
| Tipo: Text |
Palavras-chave: Crassostrea virginica; Oyster aquaculture; Chesapeake Bay; Spatial management; User conflicts. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00611/72337/71162.pdf |
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| Goulletquer, Philippe. |
| NOAA’s National Marine Fisheries Services (NMFS) received a petition to list the Eastern oyster (Crassostrea virginica) as either threatened or endangered under the Endangered Species Act (ESA). The Eastern oyster is an emblematic species in the US coastal states, playing a significant role at various levels: shaping coastal social communities, providing a commercial activity (public fishery & aquaculture) and recreational - amenity benefits, and as a keystone species in highly diverse and sensitive ecosystems (estuaries). This petition is likely the result of concerns regarding the partial collapse of public fisheries in several states as well as from the resulting damages to this species induced by severe hurricanes. A Biological Review Team (BRT)... |
| Tipo: Text |
Palavras-chave: Biology; Habitat threats; Predation; Disease; Bivalvia; Crassostrea virginica; Oyster; Recommendations. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00043/15458/12833.pdf |
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| Prou, Jean; Heral, Maurice; Goulletquer, Philippe; Forget, Maïté; Bougrier, Serge; Razet, Daniel. |
| The project of cultivation of oyster has been designed to evaluate the growth rate, the mortality, the reproductive effort, production and biochemical composition of the oyster function of the density and the depth. This plan was intended: - to build model of growth rate, - to demonstrate the action of the different parameters on growth rate (temperature, food effect...), - to evaluate the density effect to see if the available food could be a limiting factor, - to estimate the effect of the depth joined to the impact of the high turbidity near the bot tom, - to detect the mortality related to the prevalence of diseases. The project began in July 1989 by dredging 20 000 small oysters at the mouth of the Patuxent River near Cove Point. Three experimental... |
| Tipo: Text |
Palavras-chave: Physiology; Seasonal variation; Biochemical composition; Density; Crassostrea virginica; Cheseapeake Bay. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00200/31104/29503.pdf |
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| Murphy, S; Oliver, J. |
| Of the several bacterial diseases which may result from consumption of shellfish, those caused by marine bacteria of the genus Vibrio are the most abundant. In the United States, up to 10,000 non-fatal cases per year are estimated to be caused by the various members of this genus. More than 95% of all deaths in the United States which result from seafood consumption are caused by a single bacterium, Vibrio vulnificus. The bacterium is a normal inhabitant of estuarine waters, and occurs naturally in especially high numbers in molluscan shellfish. Infections following consuption of raw or undercooked shellfish, especially oysters, result in fatality rates of over 60%. Because most oysters in the United States are transported large distances before marketing,... |
| Tipo: Text |
Palavras-chave: USA Coasts; Vibrio cholerae; Vibrio vulnificus; Crassostrea virginica; Bivalvia; Bacteria; Temperature effects; Food technology; Fish poisoning; Oyster culture. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1622.pdf |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Renault, Tristan; Cochennec, Nathalie. |
| Premier volet du programme d'essai d'acclimatation de l'huître américaine Crassostrea virginica, ce rapport présente les actions et les résultats de l'année 1992 qui a été consacrée à : • l'importation selon les normes du CIEM d'un lot de 50 huîtres en provenance d'Angleterre, • leur élevage en salle de quarantaine et leur conditionnement en vue d'une accélération de la maturation sexuelle, • l'obtention d'une première génération, ainsi que son suivi en élevage larvaire et en micronurserie à l'URGE-La Tremblade, • au contrôle des performances comparées des deux populations de C. virginica et de C. gigas en nurserie de prégrossissement à l'URRA-Bouin pendant toute la période automnale et hivernale. Au terme de cette première année d'étude il apparait que la... |
| Tipo: Text |
Palavras-chave: Mollusques; Acclimatation; Crassostrea virginica; Crassostrea gigas; Génétique; Pathologie. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00077/18843/16417.pdf |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Heurtebise, Serge; Nourry, Max; Renault, Tristan; Cochennec, Nathalie; Zanette, Yvan; Blachier, Philippe. |
| Deuxième volet du programme d'essai d'acclimatation de l'huître américaine Crassostrea virginica, ce rapport présente les actions et les résultats de l'année 1993 qui a été consacrée au suivi des performances comparées de croissance des populations de C. gigas et C. virginica produites en 1992, ceci en trois sites différents: • dans le bassin de Marennes-Oléron en claire et sur estran, à la station IFREMER de Bouin en élevage intensif, au CREAA sur l'Ile d'Oléron en marais extensif. Au terme de cette seconde année d'étude, il est d'ores et déjà possible d'affirmer que que la souche anglaise de C. virginica étudiée ne présente pas de caractéristiques de croissance susceptibles de la rendre compétitive par rapport au témoin Crassostrea gigas et cela d'autant... |
| Tipo: Text |
Palavras-chave: Mollusques; Acclimatation; Crassostrea virginica; Crassostrea gigas; Génétique; Pathologie. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00077/18846/16419.pdf |
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| Heral, Maurice. |
| The total marine molluscs produced by aquaculture had increased from 1984 to 1990 by 1 000 000 tons going from 1 993 985 tons to 2 964 688 tons. The oyster production remained constant with 870 000 tons. Crassostrea gigas, the Japanese oyster, represented more than 80 % of the oyster production but high mortalities appeared in different countries connected to end of winter and summer mortalities and development of new diseases. The cultivation of Crassostrea virginica, the American oyster, was limited (80 000 tons) by the spreading of two diseases (MSX and dermo) destruction of habitat and over-exploitation. Production of the fiat oyster Ostrea eduIis was still very limited by the presence of the Bonamia diseases in a11 the countries except on... |
| Tipo: Text |
Palavras-chave: Ostrea edulis; Crassostrea virginica; Crassostrea gigas; Huîtres; Culture; Production; Ostréiculture. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/acte-3067.pdf |
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| Scyphers, Steven B; University of South Alabama; Dauphin Island Sea Lab; Northeastern University; s.scyphers@neu.edu; Picou, J Steven; Coastal Resource and Resiliency Center University of South Alabama; spicou@southalabama.edu; Brumbaugh, Robert D; The Nature Conservancy; rbrumbaugh@tnc.org; Powers, Sean P; University of South Alabama; Dauphin Island Sea Lab; spowers@disl.org. |
| Oyster reefs provide coastal societies with a vast array of ecosystem services, but are also destructively harvested as an economically and culturally important fishery resource, exemplifying a complex social-ecological system (SES). Historically, societal demand for oysters has led to destructive and unsustainable levels of harvest, which coupled with multiple other stressors has placed oyster reefs among the most globally imperiled coastal habitats. However, more recent studies have demonstrated that large-scale restoration is possible and that healthy oyster populations can be sustained with effective governance and stewardship. However, both of these require significant societal support or financial investment. In our study, we explored relationships... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Common pool resource; Crassostrea virginica; Ecosystem-based management; Ecosystem services; Marine protected areas; Restoration; Spawning sanctuaries. |
| Ano: 2014 |
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| Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno; Maffart, Patricia. |
| Progeny of Crassostrea virginica oysters, introduced into France in 1992, were reared during 1992 and 1993, to test their growth performances. These assays were performed to investigate the possible replacement of Crassostrea gigas with a non indigenous species, Crassostrea virginica. During the summer of 1993, sporadic mass mortalities (80-90%) occurred among young, Crassastrea virginica, oysters reared in the IFREMER nursery in La Tremblade (Charente Maritime). |
| Tipo: Text |
Palavras-chave: Histology; Crassostrea virginica; Mortality; Oysters. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/acte-2975.pdf |
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| Vignier, J.; Soudant, P.; Chu, F. L. E.; Morris, J. M.; Carney, M. W.; Lay, C. R.; Krasnec, M. O.; Robert, Rene; Volety, A. K.. |
| In April 2010, crude oil was spilled from the Deepwater Horizon (DWH) oil platform for 87 days, coincident with the spawning season and recruitment of the oyster, Crassostrea virginica, in the Gulf of Mexico. Impacts of acute exposures to surface-collected DWH oil (HEWAF), dispersed oil (CEWAF) and dispersant alone (Corexit 9500A®) on planktonic larval stages of C. virginica (veliger, umbo and pediveliger) were tested in the laboratory. Exposures to HEWAF, CEWAF and dispersant were toxic to larvae impairing growth, settlement success and ultimately survival. Larval growth and settlement were reduced at concentrations of tPAH50 ranging from 1.7 to 106 μg L−1 for HEWAF and 1.1–35 μg L−1 for CEWAF, concentrations well within the range of water sampled during... |
| Tipo: Text |
Palavras-chave: Deepwater Horizon oil spill; Crassostrea virginica; Corexit 9500A (R); Larvae; Growth; Settlement; PAH. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00345/45572/45181.pdf |
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| Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno. |
| Progeny of Crassostrea virginica oysters, introduced into France in 1992, were reared at 3 different locations. A survey was taken of these young C. virginica oysters during 1993. Histological and electron microscopical examination revealed a parasite interpreted as a Martelia-like protozoan in 1 oyster. The structure and the initial stages of the developmental cycle of this parasite are described for the first time in American oysters. However, no mature spores were detected. Thus, exact identification of the protozoan is difficult. This study indicates that American oysters could be infected with Marteilia spp. during cohabitation with Marteilia-infected native bivalves in France. |
| Tipo: Text |
Palavras-chave: Marteilia like parasite; Marteiliosis; Crassostrea virginica; American oyster. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/publication-2897.pdf |
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| Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno. |
| Progeny of Crassostrea virginica oysters, introduced into France in 1992, were reared at 3 different locations. A survey was taken of these young C, virginica oysters during 1993. Histological and electron microscopical examination revealed a parasite interpreted as a Marteilia-like protozoan in 1 oyster. The structure and the initial stages of the developmental cycle of this parasite are described for the first time in American oysters. However, no mature spores were detected. Thus, exact identification of the protozoan is difficult. This study indicates that American oysters could be infected with Marteilia spp, during cohabitation with Marteilia-infected native bivalves in France. |
| Tipo: Text |
Palavras-chave: American oyster; Crassostrea virginica; Marteiliosis; Marteilia-like parasite. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00258/36926/36177.pdf |
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| Prou, Jean; Goulletquer, Philippe; Bacher, Cedric. |
| In oyster production area the determination of the stock, estimation of mortality and growth rates are determinant for knowledge of the fishery. Growth models can be used to predict the time to reach marketable size (76 mm in Chesapeake Bay). They are also important in term of management, when they can predict the future value of the stock (Askew, 1978). Oyster growth models can be built by analysing growth of natural oysters but absolute age is orten unknown. Many authors report growth data in Chesapeake Bay for suspended oyster culture. Unfortunalely, modelisation of the growth was not developed. In that study oyster, shell growth models have been established at three stations in the Patuxent river. Seasonal eITects on growth were integrated in the model |
| Tipo: Text |
Palavras-chave: Modelisation; Oysters; Crassostrea virginica; Growth; Chesapeake Bay. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00200/31109/29512.pdf |
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| Boudry, Pierre; Saavedra, Carlos. |
| Dr. Boudry presented an overview of the current development of molecular tools in shellfish bivalves, focussing on the recent development in oysters, species to which the most efforts are dedicated. This review was prepared together with Dr. Saavedra (Mollusc Research Group, Torre de la Sal, Spain) within the Fish and Shellfish group of the EU Network of Excellence "Marine Genomics Europe". Searches in DNA sequence databank ("GenBank") show that 4% are microsatellite sequences, 23% are mitochondrial sequences and the remaining 73 % other nuclear sequences. Among these, 75% concern oyster (Crassostrea) species, 15% mussel (Mytilus) species and 10% scallop (Argopecten) species. Some of these sequences were targeted as candidate genes related to known... |
| Tipo: Text |
Palavras-chave: QTLs; Mitochondrial geneome; Crassostrea virginica; Crassostrea gigas; Crassostrea; Shellfish bivalves; Molecular tools; Genetic. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3480.pdf |
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| Genard, Bertrand; Pernet, Fabrice; Lemarchand, Karine; Boudry, Pierre; Moraga, Dario; Tremblay, Rejean. |
| In this paper, biochemical and physiological analyses were used to characterize changes associated with mortality event occurred during veliger development of American oyster, Crassostrea virginica. Biochemical analyses included the evaluation of lipid classes, fatty acid composition and total protein content. Larval physiology was evaluated by studying feeding activity, enzymes related to energy metabolism, oxidative stress levels and enzymatic antioxidant defenses. These analyses were complemented by bacterial community analyses as well as by measuring larval oyster performance. We observed that mortality events coincided with (1) strong changes in the surrounding bacterial community; (2) a progressive decrease in feeding activity; (3) higher levels of... |
| Tipo: Text |
Palavras-chave: Massive mortality; Larvae; Microbial environment; Lipid; Fatty acids; Energy metabolism; Oxidative stress; Antioxidant enzymes; Crassostrea virginica. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00051/16231/13753.pdf |
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| Registros recuperados: 23 | |
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