Consulta: subjectFacets:"Shellfish"
Registros recuperados: 112
Data/hora: 04/06/2024 01:38:07

Cold storage of Pacific oysters out of water: biometry, intervalval water and sensory assessment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Buzin, Florence; Baudon, Violaine; Cardinal, Mireille; Barille, Laurent; Haure, Joel.
Due to the important economic activity of oyster production in France, microalgal toxic events represent a significant constraint for shellfish farmers who face closures of bivalve production-sites. The frequency of closures of 3 weeks or less represents half of the total closures along the French coasts. Cold storage could be a simple and affordable solution for temporary and short-term storage before commercialisation. A stock of marketable Pacific oyster Crassostrea gigas was therefore stored during 22 days in non-immersed conditions at 3 degrees C with 100% humidity. At the end of the experiment, the oyster mortality rate remained at a low level of less than 3.5%. The sensory attributes, odour, appearance, texture and flavour, did not show significant...
Tipo: Text
Palavras-chave: Quality control; Refrigeration; Sensory evaluation; Shelf life; Shellfish.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00041/15245/12840.pdf

Three-year study to assess human enteric viruses in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Haugarreau, Larissa; Miossec, Laurence; Dubois, Eric; Pommepuy, Monique.
The main pathogenic enteric viruses able to persist in the environment, such as hepatitis A virus (HAV), Norwalk-like virus (NLV), enterovirus (EV), rotavirus (RV), and astrovirus (AV), were detected by reverse transcription-PCR and hybridization in shellfish during a 3-year study. Oyster samples (n = 108), occasionally containing bacteria, were less frequently contaminated, showing positivity for AV (17%), NLV (23%), EV (19%), and RV (27%), whereas mussel samples, collected in areas routinely impacted by human sewage, were more highly contaminated: AV (50%), HAV (13%), NLV (35%), EV (45%), and RV (52%). Sequences obtained from HAV and NLV amplicons shelved a great variety of strains, especially for NLV (strains close to Mexico, Snow Mountain Agent, or...
Tipo: Text
Palavras-chave: Molecular technique; Seasonal variation; Human pathology; Viral contamination; Shellfish; Enteric virus.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/00507/61879/65953.pdf

Evidence of the presence of viral shellfish contamination in shellfish after short rainfall events
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Saux, Jean-claude; Serais, Ophelie; Krol, Joanna; Parnaudeau, Sylvain; Salvagnac, P.; Delmas, G.; Cicchelero, V.; Claudet, J.; Pothier, P.; Balay, K.; Fiandrino, Annie; Pommepuy, Monique; Le Guyader, Soizick.
Infectious diseases linked to the consumption of raw shellfish have long been identified. Over the past century, various strategies have been set up in shellfish growing areas throughout the world to guarantee the sanitary quality of shellfish and to protect consumers. However despite sanitary improvements, human enteric viruses - especially Hepatitis A virus and norovirus– have been found to be associated with shellfish outbreaks. A recent example demonstrated the impact of storm events. Following heavy rain and sewage overflow, shellfish beds were contaminated and the shellfish from them were marketed after depuration. However, since viruses persist longer than fecal contamination indicator bacteria, several clusters of gastroenteritis cases were...
Tipo: Text
Palavras-chave: Virus; Shellfish; Contamination events.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17736/15257.pdf

Use of rotavirus virus-like particles as surrogates to evaluate virus persistence in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loisy, Fabienne; Atmar, R; Le Saux, Jean-claude; Cohen, J; Caprais, Marie-paule; Pommepuy, Monique; Le Guyader, Soizick.
Rotavirus virus-like particles (VLPs) and MS2 bacteriophages were bioaccumulated in bivalve mollusks to evaluate viral persistence in shellfish during depuration and relaying under natural conditions. Using this nonpathogenic surrogate virus, we were able to demonstrate that about 1 log(10) of VLPs was depurated after 1 week in warm seawater (22 degrees C). Phage MS2 was depurated more rapidly (about 2 log(10) in 1 week) than were VLPs, as determined using a single-compartment model and linear regression analysis. After being relayed in the estuary under the influence of the tides, VLPs were detected in oysters for up to 82 days following seeding with high levels of VLPs (concentration range between 10(10) and 10(9) particles per g of pancreatic tissue)...
Tipo: Text
Palavras-chave: Seawater; Viral diseases; Bioaccumulation; Depuration; Contamination; Model; Pancreas; Regression analysis; Shellfish; Phages; Virus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-1233.pdf

Bilan 2004 du réseau REPAMO - Réseau national de surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Celine; Arzul, Isabelle; Chollet, Bruno; Francois, Cyrille; Goubet, Anne; Joly, Jean-pierre; Miossec, Laurence; Robert, Maeva; Cuvelier, Nicolas; Lefebvre, Alain; Le Gagneur, Eric; Ropert, Michel; Mouillard, Gilbert; Gerla, Daniel; Le Gal, Dominique; Rocher, Gregory; Langlade, Aime; Bedier, Edouard; Nourry, Max; Martin, Jean-louis; Costantini, Louis; Masson, Jean-claude; Martin, Anne-genevieve.
Created in 1986, the REPAMO network (Network of mollusc pathology), is a national zoosanitary surveillance network of shellfish health status along the French coasts. Its activities are in keeping with two European Directives, 91 /67/EEC and 95/70/EC and are a patt of the institutional tasks ofIfremer. The aims of the network are to prevent the introduction and spread of exotic pathogens and to survey the evolution of notifiable pathogens already present in France. The network focused on the survey of listed diseases (bonamiosis and marteiliosis of flat oyster) in two areas under agreement process (Banc de Granville and zone X). In 2004, no sample couId be analysed to these two areas because of the difficulty to obtain flat oysters (sparse oyster beds,...
Tipo: Text
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Etat de santé; Network; Surveillance; Pathology; Molluscs; Shellfish; Health status.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00086/19702/17343.pdf

A Feedback Mechanism to Control Apoptosis Occurs in the Digestive Gland of the Oyster Crassostrea gigas Exposed to the Paralytic Shellfish Toxins Producer Alexandrium catenella
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rolland, Jean-luc; Medhioub, Walid; Vergnes, Agnes; Abi-khalil, Celina; Savar, Veronique; Abadie, Eric; Masseret, Estelle; Amzil, Zouher; Laabir, Mohamed.
To better understand the effect of Paralytic Shellfish Toxins (PSTs) accumulation in the digestive gland of the Pacific oyster, Crassostrea gigas, we experimentally exposed individual oysters for 48 h to a PSTs producer, the dinoflagellate Alexandrium catenella. In comparison to the effect of the non-toxic Alexandrium tamarense, on the eight apoptotic related genes tested, Bax and BI.1 were significantly upregulated in oysters exposed 48 h to A. catenella. Among the five detoxification related genes tested, the expression of cytochrome P450 (CYP1A) was shown to be correlated with toxin concentration in the digestive gland of oysters exposed to the toxic dinoflagellate. Beside this, we observed a significant increase in ROS production, a decrease in...
Tipo: Text
Palavras-chave: Shellfish; Toxin; Biomarker; Expression; Phytoplankton.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00225/33606/32003.pdf

Validity of Escherichia coli, enterovirus, and F-specific RNA bacteriophages as indicators of viral shellfish contamination
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miossec, Laurence; Le Guyader, Soizick; Pelletier, Dominique; Haugarreau, Larissa; Caprais, Marie-paule; Pommepuy, Monique.
The sanitary classification of harvesting areas for bivalve mollusks in France is based on the level of Escherichia Coli contamination detected in shellfish meat, as defined in EC Directive 91/492 EEC. However, outbreaks of gastroenteritis or hepatitis after consumption of shellfish meeting current bacteriological standards suggest that E. coli is a poor indicator of viral contamination. The purpose of this study was to assess the adequacy of enterovirus and F-specific RNA bacteriophages as new indicators of human enteric viruses. Shellfish were sampled over a 37-mo period to characterize microbial contamination in two coastal areas subjected to different sewage contamination inputs. Contamination by E. coli, F-specific RNA bacteriophages (F+ RNA) and...
Tipo: Text
Palavras-chave: Indicator; Escherichia coli; F specific RNA bacteriophages; Enteric viruses; Viral contamination; Shellfish.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/00000/10006/7794.pdf

Surveillance des phycotoxines dans les coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Nicolas, Marina; Belin, Catherine; Favre, Pauline; Rudloff, Laurence.
This paper presents the French national system for monitoring three groups of marine biotoxins regulated in shellfish, implemented firstly in marine production areas by the REPHY REPHYTOX network of IFREMER and secondly at distribution level through the network of laboratories accredited by the Directorate General for Food within the framework of official controls. The European regulations, the nature of the shellfish toxins, and analytical methods used are presented. The sampling procedures and strategy, as well as the results obtained by each of the two systems mentioned, are presented and discussed.
Tipo: Text
Palavras-chave: Phycotoxines; Coquillages; Toxines lipophiles; ASP; PSP; Surveillance; Phycotoxins; Shellfish; Lipophilic toxins; ASP; PSP; Surveillance.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00393/50407/51123.pdf

Quantification of Vibrio parahaemolyticus, Vibrio vulnificus and Vibrio cholerae in French Mediterranean coastal lagoons
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Cantet, Franck; Hervio-heath, Dominique; Caro, A; Le Mennec, Cecile; Monteil, Caroline; Quemere, Catherine; Jolivet-gougeon, Anne; Colwell, Rita R.; Monfort, Patrick.
Vibrio parahaemolyticus, Vibrio vulnificus and Vibrio cholerae are human pathogens. Little is known about these Vibrio spp. in the coastal lagoons of France. The purpose of this study was to investigate their incidence in water, shellfish and sediment of three French Mediterranean coastal lagoons using the most probable number-polymerase chain reaction (MPN-PCR). In summer, the total number of V. parahaemolyticus in water, sediment, mussels and clams collected from the three lagoons varied from 1 to &gt;1.1 x 10.3 MPN/l, 0.09 to 1.1 x 10.3 MPN/ml, 9 to 210 MPN/g and 1.5 to 2.1 MPN/g, respectively. In winter, all samples except mussels contained V. parahaemolyticus, but at very low concentrations. Pathogenic (tdh- or trh2-positive) V. parahaemolyticus were...
Tipo: Text
Palavras-chave: Vibrio; Lagoons; Shellfish; Water; Sediment; Human pathogen.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25890/23889.pdf

Modeling of Faecal Contamination in Water from Catchment to Shellfish Growing Area
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougeard, Morgane; Le Saux, Jean-claude; Perenne, Nicolas; Le Guyader, Soizick; Pommepuy, Monique.
During rainstorms, watersheds can introduce large amounts of faecal pollution into the rivers and sea, leading to shellfish contamination. In this study, we assessed Escherichia coli fluxes from a catchment, and their impact on estuarine water quality, using two assembled models. For the catchment, the agro-hydrological model SWAT was implemented integrating land uses, soil, topography, rainfall and other climatic data on Daoulas watershed (France). Initially, the SWAT model was calibrated and validated for river flow rates, and results were found satisfactory. Subsequently, different faecal contamination sources were integrated into the model: point sources (WWTP discharges into rivers) and non-point sources (manure spreading on fields). During rainfall...
Tipo: Text
Palavras-chave: Modeling; SWAT; MARS; E. coli; Shellfish; Catchment; Estuary.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17748/15270.pdf

Technical paper on Toxicity Equivalency Factors for Marine Biotoxins Associated with Bivalve Molluscs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: FAO/WHO.
World bivalve molluscs production (capture + aquaculture) has been increasing substantially in the last fifty years, going from nearly one million tonnes in 1950 to about 15 million tonnes in 2012. Being filter feeders, bivalves utilise natural plankton and detritus as feed and do not require artificial feeds. But this filter feeding nature is also the reason for the requirement of strict environmental hygiene to produce bivalves safe for human consumption. They tend to concentrate microorganisms, toxins and chemicals from the environment and therefore, their safety management requires stringent sanitary measures to ensure consumer protection. Following the request of Codex Committee on Fish and Fishery Products (CCFFP), FAO/WHO agreed to develop a...
Tipo: Text
Palavras-chave: Toxicity; Shellfish; Risk assessment; Fisheries; Fishery products; Consumer protection; Food safety; Aquatic environment.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00360/47124/47058.pdf

DIPNET - A European project to evaluate disease interactions and pathogen exchange between farmed and wild aquatic animal population fish, shellfish and crustaceans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miossec, Laurence; Garseth, A. H.; Midtlyng, P. J.; Raynard, R.; Peeler, E.; De Bals, I.
DIPNET (Disease Interaction and Pathogen exchange Network) is a co-ordination action funded under the UE Framework programme 6 priority 8 Scientific Support to Policy (SSP). The principal objective of DIPNET is to increase scientific knowledge of the potential transfer of pathogens and diseases between wild and farmed fish and shellfish populations. DIPNET started in October 2004 and is a 2 year project. The project is organized in four work packages. Work package (WP) 1 is focused on a literature review of disease interactions and pathogen exchange between farm and wild aquatic animals. This analysis includes both published and unpublished literature. The work covers a wide range of habitats and species within Europe and, where relevant, world-wide. WP1...
Tipo: Text
Palavras-chave: DIPNET; Crustaceans; Shellfish; Fish; Epidemiology; Risk assessment; Diseases; Transfer of pathogens.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3325.pdf

Surveillance des risques biologiques liés à la consommation de coquillages en France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Vaillant, Véronique; Jourdan-da Silva, Nathalie; Quilici, Marie-laure; Couturier, Elisabeth; Le Guyader, Soizick; Delmas, Gilles; Le Saux, Jean-claude.
Shellfish filter large volumes of water to meet their nutritional requirements and thus ingest phytoplankton, but also concentrate microorganisms naturally present in water (vibrios, phycotoxins) or of fecal origin (enteric viruses, enterobacteria, protozoan). The analysis of data from systems contributing to the surveillance of foodborne illnesses associated with shellfish consumption and from published outbreak investigations shows that, in France, foodborne illnesses associated with shellfish consumption are mainly of viral origin, mostly due to norovirus followed by hepatitis A virus. The risk linked to phycotoxins appears low and the one related to enterobacteria and vibrios very low. The mandatory notification (MN) of foodborne outbreaks remains the...
Tipo: Text
Palavras-chave: Toxi-infections alimentaires; Coquillages; Phycotoxines; Risques biologiques; Surveillance épidémiologique; Déclaration obligatoire; France; Foodborne illnesses; Shellfish; Phycotoxins; Biological risks; Epidemiological surveillance; Mandatory notification; France.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00092/20362/18023.pdf

Possible relation between a winter epidemic of acute gastroenteritis in France and viral contamination of shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miossec, Laurence; Le Guyader, Soizick; Haugarreau, Larissa; Comps, Marie-annick; Pommepuy, Monique.
Several outbreaks of gastroenteritis related to the consumption of shellfish (frequently eaten raw) have been reported in different parts of the world. In Europe, hum an calicivirus infections may have been involved in winter outbreaks in recent years, although there is little evidence confirming such viral contamination in shellfish. This study presents the first results of a field survey on viral contamination in two shelllish harvesting areas along the French Mediterranean coast. The first, consisting mainly of oyster beds, was c1assified in category A, as determined by fecal coliform counts in shellfish (European Community Directive 91/492), and the second, a mussel bed, was c1assified in category C. Shelllish samples were collected monthly between...
Tipo: Text
Palavras-chave: Shellfish; Viral contamination; Enterovirus; Human calicivirus; Rotavirus; Astrovirus; Fecal coliforms; Gastroenteritis.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00001/11257/7802.pdf

Rapport de mission AQUANET Forum, Fredericton, New Brunswick, Canada, 16- 18 juin 2003 &amp; visite à la station biologique de St Andrews, New Brunswick, Canada, 19 juin 2003
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph.
Among the Excellence Centers developed to federate the Canadian research, Aquanet deals with marine and freshwater aquaculture. An interdisciplinary science forum was held at Fredericton, New Brunswick, Canada, in order to analyse the state of the fish and shellfish aquaculture sector and propose orientations for the future researches. Around 30 Canadian scientists and professionnals (a Norvegian and a French scientist invited) attended the meeting. A visit at the biological station and Huntsman marine center at Saint-Andrews, New Brunswick, concluded the mission
Tipo: Text
Palavras-chave: Canada; Nouveau Brunswick; Pisciculture; Conchyliculture; Aquaculture; Programmation Recherche; Aquanet; Canada; New Brunswick; Fish; Shellfish; Aquaculture; Research; Aquanet.
Ano: 2003
URL: https://archimer.ifremer.fr/doc/00681/79316/81824.pdf

Development of genomic probes for detection of hepatitis A virus and enteroviruses in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Apaire, M; Leguyader, F; Besse, B; Billaudel, S.
The development of molecular biology techniques has modified research procedures for certain viruses, particularly hepatitis A virus (HAV) and enteroviruses. Accordingly, we designed cDNA and RNA genomic probes to detect viruses in shellfish in the environment. Better sensitivity was noted with RNA than cDNA probes: only 17/83 shellfish samples were positive with HAV and enterovirus DNA probes, where as 42/83 were positive with HAV and enterovirus RNA probes.
Tipo: Text
Palavras-chave: Mollusca; Enterovirus; Hepatitis A virus; Picornaviridae; RNA probes; DNA probes; Seafood; Biology; Sensors; DNA; RNA; Viruses; Detection; Marine molluscs; Shellfish.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1613.pdf

Health risk assessment related to pinnatoxins in French shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arnich, Nathalie; Abadie, Eric; Delcourt, Nicolas; Fessard, Valérie; Fremy, Jean-marc; Hort, Vincent; Lagrange, Emmeline; Maignien, Thomas; Molgó, Jordi; Peyrat, Marie-bénédicte; Vernoux, Jean-paul; Mattei, César.
Pinnatoxins (PnTXs) are a group of emerging marine biotoxins produced by the benthic dinoflagellate Vulcanodinium rugosum, currently not regulated in Europe or in any other country in the world. In France, PnTXs were detected for the first time in 2011, in mussels from the Ingril lagoon (South of France, Mediterranean coast). Since then, analyses carried out in mussels from this lagoon have shown high concentrations of PnTXs for several months each year. PnTXs have also been detected, to a lesser extent, in mussels from other Mediterranean lagoons and on the Atlantic and Corsican coasts. In the French data, the main analog is PnTX G (low levels of PnTX A are also present in some samples). No cases of PnTXs poisoning in humans have been reported so far in...
Tipo: Text
Palavras-chave: Pinnatoxins; Shellfish; Emerging marine biotoxins; Risk assessment.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00619/73105/72236.pdf

Relance de l'huître plate. Rapport d'avancement des travaux. Année 1992
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Anne-genevieve.
A revival program for the European flat oyster Ostrea edulis was initiated in Brittany in 1984 and funded by regional and national agencies. Since then, the research programs were carried out and the 1992 results are presented in this report. Disease status and spat settlement trends are described within each breeding area as well as advances in management practices and genetic research.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiologie; Pathologie; Génétique; Echantillonnage; Elevage; Shellfish; Ostrea edulis; Bonamia ostreae; Marteilia refringens; Epidemiology; Pathology; Genetic; Sampling; Breeding.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00427/53823/54814.pdf

Small-scale spatial variability of food partitioning between cultivated oysters and associated suspension-feeding species, as revealed by stable isotopes
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubois, Stanislas; Orvain, Francis; Marin Leal, Julio César; Ropert, Michel; Lefebvre, Sébastien.
Oyster culture structures support a host of epibionts belonging to the same suspension-feeding guild, which are considered to be potential competitors for food with cultivated oysters. In an intertidal shellfish ecosystem on the northern French coast, an approach based on stable isotopes (C-13 and N-15) was used to investigate intra- and interspecific food resource partitioning among cultivated oysters and the main associated wild sessile epibionts such as polychaetes, barnacles, mussels and ascidians. The main objective of the present study was to determine inter- and intraspecific food partitioning, along with small-scale spatial variability, within the guild of suspension feeders. We demonstrated that interspecific competition was limited among...
Tipo: Text
Palavras-chave: Trophic plasticity; Spatial variability; Stable isotopes; Sessile epibionts; Oysters; Shellfish.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2626.pdf

La surveillance des phycotoxines dans les coquillages du milieu marin. Le réseau REPHY : objectifs, stratégies, et principaux résultats
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine.
The surveillance of phycotoxins in marine shellfish. The REPHY network: objectives, strategies and primary results One of the objectives of REPHY (network for phytoplankton and phycotoxin surveillance) is to monitor toxin-producing micro-algae species in the marine environment that are likely to accumulate in seafood products, and to screen for these toxins in shellfish. This surveillance is undertaken in the framework of the European regulations. Three groups of toxins are thus monitored and are associated with three genera of toxic phytoplankton: (i) Dinophysis, a producer of the okadaic acid (with diarrhoeic effects) and pectenotoxin families of toxins; in the same group of so-called “lipophilic toxins”, two other families of regulated toxins are...
Tipo: Text
Palavras-chave: Santé; Surveillance; Phytoplancton; Phycotoxines; Coquillages; Milieu marin; Health; Surveillance; Phytoplankton; Phycotoxins; Shellfish; Marine environment.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00449/56089/57623.pdf

Genetical improvement of marine fish and shellfish : a french perspective
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boudry, Pierre; Chatain, Beatrice; Naciri-graven, Yamama; Lemaire, Christophe; Gerard, Andre.
In France, marine fish and shellfish farming is based mainly on the breeding of wild species, whose natural populations are traditionally exploited. Research programs are conducted by IFREMER, in co-operation with INRA and Universities. French research programs for the genetical improvement of marine fish and shellfish concern primarily seabass (Dicentrarchus labrax) and oysters (Ostrea edulis and Crassostrea gigas). The following programs are developed:  •The knowledge of wild and farmed populations. The most recent prodjects involve the highly variable microsatellite markers. Seven markers are presently available for seabass and the work is now initiated on turbot (Scophthalmus maximus). In molluscs, microsatellite markers have been developed for the...
Tipo: Text
Palavras-chave: Selection; Triploid; Shellfish; Fish; Genetic.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/acte-3206.pdf

Microbiologie et coquillages : des enjeux et des développements futurs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Garry, Pascal; Ollivier, Joanna; Piquet, Jean-come.
The shellfish safety has long been considered a public health problem. The implementation of a regulation based on a bacterial indicator of faecal contamination has significantly reduced outbreaks of bacterial origin. However, epidemics of viral gastroenteritis due to the presence of noroviruses from human sewage persist. We demonstrated few years ago that oysters are not just a passive filter but are able to select some viral strains, via the presence of specific ligands, very similar to ligands observed in humans for these same virus. Ongoing developments, in conjunction with the application of metagenomic tools, will allow us to better understand the fate of some human pathogens after their release into the coastal environment.
Tipo: Text
Palavras-chave: Shellfish; Microbiology; Oysters; Norovirus.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00599/71141/69457.pdf

First report of the potentially toxic marine diatom Pseudo-nitzschia simulans (Bacillariophyceae) from the East Australian Current
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ajani, Penelope A.; Lim, Hong Chang; Verma, Arjun; Lassudrie, Malwenn; Mcbean, Katie; Doblin, Martina A.; Murray, Shauna A.
Certain species of the marine diatom genus Pseudo‐nitzschia are responsible for the production of the domoic acid (DA), a neurotoxin that can bioaccumulate in the food chain and cause amnesic shellfish poisoning (ASP) in animals and humans. This study extends our knowledge by reporting on the first observation of the potentially toxic species Pseudo‐nitzschia simulans from this region. One clonal strain of P. simulans was isolated from the East Australian Current and characterized using light and transmission electron microscopy, and phylogenetic analyses based on regions of the internal transcribed spacer (ITS) and the D1–D3 region of the large subunit (LSU) of the nuclear‐encoded ribosomal deoxyribonucleic acid (rDNA), as well as examined for DA...
Tipo: Text
Palavras-chave: Domoic acid; East Australian current; Harmful algal blooms; Phytoplankton; Shellfish.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00618/73047/75313.pdf

Vigilance, veille et surveillance des risques alimentaires phycotoxiniques
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Grastilleur, Charlotte; Arnich, Nathalie; Belin, Catherine.
Official routine monitoring of phycotoxins and toxinproducing algae is regularly implemented in the marine environment through phytoplankton identification in water samples, as well as by official analysis in shellfish in order to verify compliance with the maximum limits set in regulation (EC) no.853/2004. These activities are conducted by the official REPHY network, coordinated by IFREMER (French Research Institute for Exploitation of the Sea). As for other food safety hazards, the issue of emerging and non-regulated hazards needs to be fully addressed in addition to the ongoing above-mentioned surveillance efforts. This issue was submitted to ANSES (French Agency for Food, Environmental and Occupational Health &amp; Safety) in the surveillance framework...
Tipo: Text
Palavras-chave: Phytoplancton; Phycotoxines; Biotoxines marines; Alexandrium; Dinophysis; Pseudo-nitzschia; ASP; DSP; PSP; Surveillance des aliments; Veille alimentaire; Sécurité sanitaire des aliments; Coquillages; Phytoplankton; Phycotoxins; Marine biotoxins; Alexandrium; Dinophysis; Pseudo-nitzschia; ASP; DSP; PSP; Food monitoring; Food surveillance; Food safety; Shellfish.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00393/50471/51206.pdf

Contamination of Clams with Human Norovirus and a Novel Hepatitis A Virus in Cameroon
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bonny, Patrice; Desdouits, Marion; Schaeffer, Julien; Garry, Pascal; Essia Ngang, Jean Justin; Le Guyader, Soizick.
Shellfish constitute an important protein source but may be contaminated by viruses from various origins. A study performed on clams collected in Cameroon showed a high prevalence of norovirus and hepatitis A virus. After sequencing, the hepatitis A virus showed similarities with the genotype V simian strains. The need for a one-health approach to protect humans from emerging diseases is evident by the high number of microbial pathogens that become zoonotic following insect bites or consumption of contaminated meat. This is particularly well documented for infectious disease transmission from non-human primates to human (Devaux et al. 2019). Environmental issues are critical in such events, especially for RNA viruses that may be excreted at high...
Tipo: Text
Palavras-chave: Shellfish; Hepatitis A virus; Molecular epidemiology.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00635/74745/74851.pdf

Potential of F-specific RNA bacteriophages to discriminate sources of faecal pollution in French shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caprais, Marie-paule; Le Mennec, Cecile; Pommepuy, Monique; Le Saux, Jean-claude; Gourmelon, Michele.
In Europe, shellfish harvesting areas are classified according European Directive EC N°854/2004, using classic faecal indicator levels (Escherichia coli). A better indicator is needed, however, because shellfish may contain other human pathogens. Other indicator organisms have therefore been evaluated and, among these, coliphages meet most of the requirements to serve as indicators and models for enteroviruses. In order to evaluate the capacity of coliphages as indicators, a total of 764 shellfish were sampled in 2004 from 70 shellfish harvesting areas monitored by the Ifremer microbiological surveillance network (REMI, http://www.ifremer.fr/envlit/), and tested for F-specific RNA bacteriophages (FRNAPH). Two species of bivalve mollusc were collected...
Tipo: Text
Palavras-chave: F-specific RNA bacteriophage; Shellfish; Faecal pollution; Discrimination.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17749/15271.pdf

Infectivity of GI and GII noroviruses established from oyster related outbreaks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebault, Anne; Teunis, Peter F. M.; Le Pendu, Jacques; Le Guyader, Soizick; Denis, Jean-baptiste.
Noroviruses (NoVs) are the major cause of acute epidemic gastroenteritis in industrialized countries. Outbreak strains are predominantly genogroup II (GII) NoV, but genogroup I (GI) strains are regularly found in oyster related outbreaks. The prototype Norwalk virus (GI), has been shown to have high infectivity in a human challenge study. Whether other NoVs are equally infectious via natural exposure remains to be established. Human susceptibility to NoV is partly determined by the secretor status (Se+/-). Data from five published oyster related outbreaks were analyzed in a Bayesian framework. Infectivity estimates where high and consistent with NV(GI) infectivity, for both GII and GI strains. The median and CI95 probability of infection and illness, in...
Tipo: Text
Palavras-chave: Norovirus; Shellfish; Bayesian analysis; Dose-response relationship; Fucosyltransferases.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25927/24030.pdf

Investigating an avian source of shellfish faecal contamination in the Thau lagoon (the Mediterranean, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derolez, Valerie; Serais, Ophelie; Caprais, Marie-paule; Le Saux, Jean-claude; Messiaen, Gregory.
Microbes regularly contaminate Thau lagoon shellfish. Between 1997 and 2007, 18% of the analyses carried out in dry weather recorded more than 230 Escherichia coli / 100 g of bivalves (Ifremer French microbial monitoring network), leading the administration to restrict the shellfish harvest area, including suspension of production. This study aims to determine, the contribution of seabirds, which roost at night on the Thau lagoon shellfish growing frames, to shellfish faecal pollution in dry weather.Data were collected in 2008 from both the drainage area (pollution input) and the lagoon (water quality and microbial monitoring, seabird counts) in dry weather. The data showed that, with no watershed input or lagoon resurgence, microbial contaminants were...
Tipo: Text
Palavras-chave: Escherichia coli; Origine aviaire; Coquillage; Contamination fécale; Étang de Thau; Oiseau de mer; Bactériophage; Dépistage de la source microbienne; Temps sec; Escherichia coli; Avian source; Shellfish; Faecal contamination; Thau lagoon; Seabird; Bacteriophage; Microbial source tracking; Dry weather.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00025/13593/10659.pdf

Development of shellfish production models
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bacher, Cedric.
Mathematical models for biological processes are presented as a set of tools for research, which ilave been created for specifie tasks impact studies, energy budget, test of hypothesis. Before using it, the mecanisms involved must be analysed, depending upon wether a whole ecosystem or one animal is studied (biological scale), physical conditions are taken into account (physical scale), with a predetermined scale for time. The no general method for analysis can be, as conditions of studies are so different, but sorne typical cases can show the approach of the modelizer and the recent developments of its tools.
Tipo: Text
Palavras-chave: Shellfish; Test of hypothesis; Energy budget; Impact studies; Mathematical models; Conchyliculture; Validation hypothèse; Bilan énergétique; Etude d'impact; Modélisation.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6220.PDF

Depuration: An administrative overview
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Somerset, I.
At the 1964 National Shellfish Sanitation Workshop, Mr. Eugene Jensen presented a thought-provoking paper outlining the rationale for the depuration of shellfish. Mr. Jensen noted that "we are committed to the principal that shellfish must be as safe to eat as other ordinary food" and that "the problems of assuring the sanitary quality of coastal areas will increase rather than diminish. This is not the same as saying that pollution will increase" (Jensen, 1964). It is recognised that additional use of the waters and shore areas will have adverse impacts on the water quality and shellfish resource quantity and quality. If we are to maintain a program which will permit the consumer to eat shellfish in any form they choose, we must develop the means to...
Tipo: Text
Palavras-chave: France; Bivalvia; Shellfish; Water quality; Legislation; Pollution control; Self purification; Public health.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1590.pdf

Évolution du dispositif de surveillance sanitaire des zones de production de coquillages. Brèves
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Palussiere, Mathilde; Favre, Pauline; Riou, Philippe.
Tipo: Text
Palavras-chave: Coquillages; Surveillance; Zones de production; Shellfish; Surveillance; Production area.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00430/54176/55517.pdf

Three-year study to assess human enteric viruses in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Haugarreau, Larissa; Miossec, Laurence; Dubois, Eric; Pommepuy, Monique.
The main pathogenic enteric viruses able to persist in the environment, such as hepatitis A virus (HAV), Norwalk-like virus (NLV), enterovirus (EV), rotavirus (RV), and astrovirus (AV), were detected by reverse transcription-PCR and hybridization in shellfish during a 3-year study. Oyster samples (n = 108), occasionally containing bacteria, were less frequently contaminated, showing positivity for AV (17%), NLV (23%), EV (19%), and RV (27%), whereas mussel samples, collected in areas routinely impacted by human sewage, were more highly contaminated: AV (50%), HAV (13%), NLV (35%), EV (45%), and RV (52%). Sequences obtained from HAV and NLV amplicons shelved a great variety of strains, especially for NLV (strains close to Mexico, Snow Mountain Agent, or...
Tipo: Text
Palavras-chave: Molecular technique; Seasonal variation; Human pathology; Viral contamination; Shellfish; Enteric virus.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-1363.pdf

Stockage et transport des crustacés vivants
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Chartois, Herve; Latrouite, Daniel; Le Carre, P.
Fishing and trade of living crustaceans are dynamic commercial sectors in France. 25 000  tons of local or imported crabs, lobsters , crawsfishes are yearly treated. Based upon a literature review and fishmongers interviews, this study  describes the current pratices and problems associated to live crabs and  lobsters storage. Supply conditions of live crustaceans, marketing  networks, and biological, ecological and physiological characteristics of crustaceans were discussed. Morever, storage facilities, their  operating rules and factors affecting the survival rate under storage  and transportation conditions were reviewed.
Tipo: Text
Palavras-chave: Lobsters; Crabs; Shellfish; Survival rate; Transport; Storage; Crustacean; Fishery products; Langoustes; Homards; Crabes; Physiologie; Survie; Transport; Stockage; Crustacés.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-634.pdf

Exposure to the Neurotoxic Dinoflagellate, Alexandrium catenella, Induces Apoptosis of the Hemocytes of the Oyster, Crassostrea gigas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Medhioub, Walid; Ramondenc, Simon; Vanhove, Audrey; Vergnes, Agnes; Masseret, Estelle; Savar, Veronique; Amzil, Zouher; Laabir, Mohamed; Rolland, Jean-luc.
This study assessed the apoptotic process occurring in the hemocytes of the Pacific oyster, Crassostrea gigas, exposed to Alexandrium catenella, a paralytic shellfish toxins (PSTs) producer. Oysters were experimentally exposed during 48 h to the toxic algae. PSTs accumulation, the expression of 12 key apoptotic-related genes, as well as the variation of the number of hemocytes in apoptosis was measured at time intervals during the experiment. Results show a significant increase of the number of hemocytes in apoptosis after 29 h of exposure. Two pro-apoptotic genes (Bax and Bax-like) implicated in the mitochondrial pathway were significantly upregulated at 21 h followed by the overexpression of two caspase executor genes (caspase-3 and caspase-7) at 29 h,...
Tipo: Text
Palavras-chave: Shellfish; Toxins; Apoptosis; Gene expression.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28744/27213.pdf

Calcein and manganese experiments for marking the shell of the common cockle (Cerastoderma edule): tidal rhythm validation of increments formation
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahe, Kelig; Bellamy, Elise; Lartaud, Franck; De Rafelis, Marc.
This work focuses on investigating the potential of calcein and manganese as growth markers of the common cockle (Cerastoderma edule) in the bay of Somme (France). Recapture of shells, previously marked using a chemical marking and then bred in natural conditions, was performed in order to determine the shell growth patterns. Calcein marking has shown a fluorescent increment in shells after only 30 min immersion time at 150 mg L-1, but also for shells immersed 3 h at 50 mg L-1. Likewise, manganese shell marking was revealed under cathodoluminescence for shells immersed 1 h at 120 mg L-1 as well as for shells which spent 4 h at 90 mg L-1. A numerical analysis performed on each marked cockles has revealed 23 micro-increments between the mark and the ventral...
Tipo: Text
Palavras-chave: Calcein; Manganese; Marking; Cathodoluminescence; Shellfish; Cerastoderma edule.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00025/13649/10758.pdf

Impact of weather conditions on Escherichia coli accumulation in oysters of the Thau lagoon (the Mediterranean, France)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Derolez, Valerie; Soudant, Dominique; Fiandrino, Annie; Cesmat, Ludovic; Serais, Ophelie.
Aims The Thau lagoon shellfish are regularly impacted by microbial pollution of faecal origin, which cause European health standards to be exceeded and closure of the shellfish harvest. The aims of this study were to investigate the impact of weather and hydrological conditions on Escherichia coli (E. coli) accumulation factor (AF) between water and oysters and to evaluate the relevance of the use of this ratio for the purpose of sanitary risk assessment. Methods and results Water and oysters (Crassostrea gigas) were sampled simultaneously in situ during 18 months in periods of dry weather and after rainfall events. Shellfish sanitary thresholds were exceeded in both periods. The E. coli AFs measured after rainfall (median = 6) were lower than in dry...
Tipo: Text
Palavras-chave: E; Coli; Environmental health; Food safety; Shellfish; Water quality.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00119/23049/22503.pdf

Innovative rapid solid-phase immunobead assay for the detection of okadaic acid and related DSP toxins in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Park, D; Fremy, J; Marcaillou, L; Gamboa, P; Gleizes, E; Masselin, P; Goldsmith, C.
The solid-phase immunobead assay (Ciguatect super(TM)) has been optimized to detect toxins associated with diarrheic shellfish poisoning (DSP). The Ciguatect super(TM) test kit utilizes a membrane to bind the toxins and a monoclonal antibody-latex bead solution as the determination step. The presence or absence of okadaic acid (OA) and related toxins is determined by binding the toxins to a membrane attached to a plastic strip and exposing the toxins ladened membrane to a monoclonal antibody-colored latex bead complex which has a high specificity for OA and related polyether compounds. The intensity of the color on the membrane denotes the presence of the toxins. A rapid extraction method (REM super(TM)) has been developed to allow for confirmation of...
Tipo: Text
Palavras-chave: Dinophysis; Bivalvia; Algae; Marine molluscs; Immunology; Bioassays; Disease detection; Biological poisons; Shellfish.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1604.pdf

Prevalence and Characterization of Shiga Toxin-Producing and Enteropathogenic Escherichia coli in Shellfish-Harvesting Areas and Their Watersheds
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baliere, Charlotte; Rince, Alain; Blanco, Jorge; Dahbi, Ghizlane; Harei, Josee; Vogeleer, Philippe; Giard, Jean-christophe; Mariani-kurkdfian-, Patricia; Gourmelon, Michele.
Tipo: Text
Palavras-chave: STEC; EPEC; Shellfish; Water; MLST; PFGE; Biofilms.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00298/40904/39949.pdf

The role of models in assessing the impact of sewage overflows on feacal water contamination
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Riou, Philippe; Le Saux, Jean-claude; Dumas, Franck; Le Guyader, Soizick; Le Goff, R.; Maheux, Frank; Lamort, Laure; Pommepuy, Monique.
Climate change contributes to local weather modifications such as storm events and heavy rainfall, and in particular, changes in the frequency and intensity of extreme storm and rainfall events. Observations have indicated that rainfall-runoff processes, like sewage overflow may induce fecal contamination in coastal water. Pathogens present in runoff water could therefore contaminate shellfish and be responsible for food-borne disease outbreaks. Mathematical models for this were used to predict the effect of climate modifications on shellfish quality. Using a hydrodynamic model, simulations of water quality conditions under a variety of storm event scenarios were run and are presented here for a harvesting area in France. Major storm events occurring in...
Tipo: Text
Palavras-chave: Modeling; Seawater fecal contamination; E. coli; Virus; Shellfish; Climate change.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00066/17739/15261.pdf

Biodiversity–Ecosystem Functioning (BEF) approach to further understanding aquaculture–environment interactions with application to bivalve culture and benthic ecosystems
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lacoste, Elise; Mckindsey, Christopher W.; Archambault, Philippe.
Coastal benthic ecosystems may be impacted by numerous human activities, including aquaculture, which continues to expand rapidly. Indeed, today aquaculture worldwide provides more biomass for human consumption than do wild fisheries. This rapid development raises questions about the interactions the practice has with the surrounding environment. In order to design strategies of sustainable ecosystem exploitation and marine spatial planning, a better understanding of coastal ecosystem functioning is needed so that tools to quantify impacts of human activities, including aquaculture, may be developed. To achieve this goal, some possible directions proposed are integrated studies leading to new concepts, model development based on these concepts and...
Tipo: Text
Palavras-chave: Aquaculture-environment interactions; Benthic system; Biodiversity; Ecosystem functioning; Shellfish.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00611/72279/71161.pdf

Relance de l'huître plate. Rapport d'avancement des travaux 1988.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: IFREMER (LA TRINITE/MER - LA TREMBLADE).
Un contrat de Plan État-Région Bretagne a été signé en 1983 pour financer des recherches sur la période 1984-1988 dans le but de permettre la relance de l'élevage de l'huître plate, à la suite de la deuxième épizootie due à un protozaire, Bonamia ostreae. Ce rapport présente les travaux réalisés et les résultats acquis durant l'année 1988, dans les domaines de la pathologie (étude de la maladie et des mécanismes de défense des mollusques) de la génétique (recherche de souches résistantes), de l'épidémiologie descriptive et de la zootechnie.
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Épidémiologie; Pathologie; Immunologie; Échantillonnage; Élevage; Shellfish; Ostrea edulis; Bonamia ostreae; Epidemiology; Pathology; Immunology; Sampling; Rearing.
Ano: 1989
URL: https://archimer.ifremer.fr/doc/00342/45284/44749.pdf

Exploring the abundance-occupancy relationships for the Georges Bank finfish and shellfish community from 1963 to 2006
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Frisk, Michael G.; Duplisea, Daniel E.; Trenkel, Verena.
Abundance-occupancy (A-O) patterns were explored temporally and spatially for the Georges Bank finfish and shellfish community to evaluate long-term trends in the assemblage structure and to identify anthropogenic and environmental drivers impacting the ecosystem. Analyses were conducted for 32 species representing the assemblage from 1963 to 2006 using data from the National Marine Fisheries Service's annual autumn bottom trawl survey. For individual species, occupancy was considered the proportion of stations with at least one individual present, and abundance was estimated as the mean annual number of fish captured per station. Intraspecific relationships were estimated to provide information on utilization of space by a species. Multispecies...
Tipo: Text
Palavras-chave: Abundance-occupancy relationships; Commercial catchability; Community ecology; Exploitation; Finfish; Fishing; Georges Bank; Habitat fragmentation; Hyperstability; Resilience; Shellfish.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14397/14043.pdf

Participatory case definition between stakeholders and implication for early detection: a case study of the oyster production in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lupo, Coralie; Osta Amigo, Axel; Marce, Clara; Prou, Jean.
Aquatic animal health surveillance is notably based on the observation of any increased shellfish mortality by shellfish farmers and its immediate mandatory notification to the local competent authority. According to current EU regulation, increased mortality is defined using a participatory approach: case reporting is based on individual farmer perception, which then can be turned into notification in cooperation between the farmer and the competent authority. All the challenge relies on starting from individual perception and knowledge of increased mortality to a collective alert onset informing potential control actions having a community interest. We made an inventory of the criteria used by surveillance stakeholders to define and detect increased...
Tipo: Text
Palavras-chave: Aquatic animal surveillance; Mortality; Shellfish; Early warming surveillance; Case definition.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00195/30600/29057.pdf

Rapport de mission International Conference on Shellfish Restoration, 2011, Stirling (Ecosse)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mazurie, Joseph.
The 14th International Conference on Shellfish Restoration (ICSR) comes this year to the United Kingdom for the first time in its 26 years history. The conference will be held at the University of Stirling in the heart of Scotland and its title and theme will be “Shellfish: our undervalued resource”. The theme of the conference, “Shellfish: our undervalued resource”, reflects the UK perception of shellfish as something that is good to eat, often in upmarket restaurants. Shellfish fisheries and aquaculture are indeed a very important part of the UK economy; shellfish reefs however form an ecosystem that provides myriad benefits (“ecosystem services”) many of which have been lost through acute fishing pressures, disease, pollution and other factors. On a...
Tipo: Text
Palavras-chave: Coquillages; Restauration; Récif; Chesapeake; Crassostrea; Service écosystémique; Shellfish; Restoration; Reefs; Chesapeake; Wadden Sea; Marine; Crassostrea.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00045/15590/12992.pdf

Lipophilic Toxin Profile in Mytilus galloprovincialis from the North Atlantic Coast of Morocco: LC-MS/MS and Mouse Bioassay Analyses
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ben Haddouch, Asia; Amanhi, Rachid; Amzil, Zouher; Taleb, Hamib; Rovillon, Georges-augustin; Adly, Farida; Loutfi, Mohammed.
Forthe Moroccan Phycotoxins Monitoring that is part of theSafety of theCoastal Monitoring Network(RSSL),shellfish sampleswereharvestedfromdifferentlocations at NorthAtlantic of Morocco whereharmful algaeblooms were known to have occurred. Forallshellfishsamples found positive by themouse bioassay fordiarrheicshellfishpoisoning(DSP)toxins,liquid chromatography coupled to tandem massspectrometry(LC-MS-MS) in order to search thefollowinglipophilictoxins: okadaic acid (OA), dinophysistoxins(DTXs), pectenotoxins(PTXs), azaspiracids(AZAs), yessotoxins(YTXs), spirolides(SPXs) and gymnodimines (GYMs).Theresultsrevealeddifferentlipophilictoxinprofiles as a function of theshellfish sampling location. It has beennoticed that allthesamples contained OA and its...
Tipo: Text
Palavras-chave: Diarrheictoxins; Lipophilic toxins; LC-MS/MS; Mouse test; Shellfish.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00372/48342/48495.pdf

Devenir des virus entériques humains en milieu marin : Apport des VLPs (Virus Like Particles) pour la purification des coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Loisy, Fabienne.
This work was developed following two research axes: the improvement of norovirus (human and animal strain) and rotavirus detection, and the evaluation of VLPs as a viral substitute for studying their comportment in marine environment. The main point concerning the method optimisation was the development of real-time RT-PCR for norovirus detection. The second part of the work has demonstrated the potential of norovirus and rotavirus VLPs as a viral surrogate as proven by the study of their stability in seawater. As VLPs are non-pathogen particles, the long persistence of rotavirus VLPs in shellfish has been shown in natural conditions (oysters on marine estuaries). The studies of Norwalk virus VLPs attachment to oyster tissues have demonstrated a specific...
Tipo: Text
Palavras-chave: Specific binding; Persistence; Shellfish; Real time RT PCR; VLPs; Rotavirus; Norovirus; Fixation spécifique; Persistance; Coquillage; RT PCR en temps réel; VLPs; Rotavirus.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-327.pdf

Report of the study group on pollution affecting shellfish in aquaculture and natural populations - 1991
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Meixner, R.; Spencer, B.; Walsh, G.; Worms, J.
This document is a report of a Study Group of the International Council for the Exploration of the Sea and does not necessarily represent the views of the Council. Therefore it should not he quoted without consultation with the General Secretary.
Tipo: Text
Palavras-chave: Natural populations; Aquaculture; Shellfish; Pollution; Populations naturelles; Aquaculture; Coquillages; Pollution.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-3048.pdf

Shellfish contamination by norovirus : strain selection based on ligand expression?
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Atmar, Robert; Maalouf, Haifa; Le Pendu, Jacques.
Shellfish can be a vector for human pathogens. Despite regulation based on enteric bacteria, shellfish are still implicated in viral outbreaks. Oysters are the most common shellfish associated with outbreaks, and noroviruses, which cause acute gastroenteritis, are the most frequently identified pathogen in these outbreaks. Analysis of shellfish-related outbreak data worldwide shows an unexpected high proportion of NoV GI strains. Recent studies performed in vitro, in vivo and in the environment indicate that oysters are not just a passive filter, but can selectively accumulate norovirus strains based on virus carbohydrate ligands shared with humans. These observations may help explain the GI/GII bias observed in shellfish-related outbreaks compared to...
Tipo: Text
Palavras-chave: Shellfish; Noroviruses; Oyster contamination; Pathogen.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00150/26093/24313.pdf

Surveillance du milieu marin et protection santiaire des coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Renault, Tristan.
Shellfish farming is a major economic activity in the European Union, France being one of the main producing countries. Regulations were introduced to meet society's current expectations in terms of food safety at the fishing, farming and harvesting stages, as weil as during processing and marketing. Toxic algae, pathogens or pollutants may contaminate shellfish products during production and harvesting, partly because of the particular environ mental conditions in which these animais are grown. Monitoring programmes were thus deve/oped to detect the presence of biological and chemical contaminants in coastal waters and in shellfish, and to monitor the food safety of the latter.
Tipo: Text
Palavras-chave: Pollutants; Microbiological contamination; Toxic algae; Shellfish; Marine environment; Programmees; Monitoring; Polluants; Contamination microbiologique; Algues toxiques; Coquillages; Milieu marin; Réseaux; Surveillance.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6932.pdf

Les Escherichia Coli potentiellement pathogenes dans l’environnement littoral : cas des STEC et des EPEC
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baliere, Charlotte.
The contamination of coastal areas by potentially pathogenic enteric bacteria is of concern for the sustainability of some uses, such as shellfish farming, recreational shellfish harvesting and bathing. The contamination of these environments may occur through the land-spreading of livestock wastes, animal feces deposited on pastures, wastewaters from slaughterhouses or from municipal wastewater treatment plants. The presence of these bacteria in coastal environment may present a potential risk to human health. In fact, shellfish-borne outbreaks or human infections may occur by the consumption of shellfish from contaminated areas or the ingestion of water during bathing in contaminated waters, respectively. To date, few studies focusing on the presence and...
Tipo: Text
Palavras-chave: STEC; EPEC; Coquillages; Diversité; Virulence; Persistance; STEC; EPEC; Shellfish; Diversity; Virulence; Persistence.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00312/42322/41653.pdf

Recent innovation in microbial source tracking using bacterial real-time PCR markers in shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mauffret, Aourell; Mieszkin, Sophie; Morizur, Mael; Alfiansah, Yustian Rovi; Lozach, Solen; Gourmelon, Michele.
We assessed the capacity of real-time PCR markers to identify the origin of contamination in shellfish. Oyster, cockles or clams were either contaminated with fecal materials and host-associated markers designed from Bacteroidales or Catellicoccus marimammalium 16S RNA genes were extracted from their intravalvular liquid, digestive tissues or shellfish flesh. Extraction of bacterial DNA from the oyster intravalvular liquid with FastDNA spin kit for soil enabled the selected markers to be quantified in 100% of artificially contaminated samples, and the source of contamination to be identified in 13 out of 38 naturally contaminated batches from European Class B and Class C areas. However, this protocol did not enable the origin of the contamination to be...
Tipo: Text
Palavras-chave: Microbial source tracking; Shellfish; Bacteroidales; Real-time PCR; Intravalvular liquid; Digestive tissues.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00137/24776/25188.pdf

Cytotoxicity and mycotoxin production of shellfish-derived Penicillium spp., a risk for shellfish consumers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Geiger, Marie; Guitton, Yann; Vansteelandt, M.; Kerzaon, I.; Blanchet, Estelle; Du Pont, T. Robiou; Frisvad, J. C.; Hess, Philipp; Pouchus, Y. F.; Grovel, Olivier.
In order to assess the putative toxigenic risk associated with the presence of fungal strains in shellfish-farming areas, Penicillium strains were isolated from bivalve molluscs and from the surrounding environment, and the influence of the sample origin on the cytotoxicity of the extracts was evaluated. Extracts obtained from shellfish-derived Penicillia exhibited higher cytotoxicity than the others. Ten of these strains were grown on various media including a medium based on mussel extract (Mytilus edulis), mussel flesh-based medium (MES), to study the influence of the mussel flesh on the production of cytotoxic compounds. The MES host-derived medium was created substituting the yeast extract of YES medium by an aqueous extract of mussel tissues, with...
Tipo: Text
Palavras-chave: Cytotoxicity; Dereplication; Marine fungi; Mass spectrometry; Penicillium; Shellfish.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27166/25523.pdf

Norwalk virus-specific binding to oyster digestive tissues
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Loisy, Fabienne; Atmar, R; Hutson, A; Estes, M; Ruvoen-clouet, N; Pommepuy, Monique; Le Pendu, J.
The primary pathogens related to shellfishborne gastroenteritis outbreaks are noroviruses. These viruses show persistence in oysters, which suggests an active mechanism of virus concentration. We investigated whether Norwalk virus or viruslike particles bind specifically to oyster tissues after bioaccumulation or addition to tissue sections. Since noroviruses attach to carbohydrates of the histo-blood group family, tests using immunohistochemical analysis were performed to evaluate specific binding of virus or viruslike particles to oyster tissues through these ligands. Viral particles bind specifically to digestive ducts (midgut, main and secondary ducts, and tubules) by carbohydrate structures with a terminal N-acetylgalactosamine residue in an alpha...
Tipo: Text
Palavras-chave: Bioaccumulation; Shellfish; Escherichia coli; Pathogen; Oyster digestive tissue; Noroviruses.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1542.pdf

Detection of human enteric viruses in shellfish collected in Tunisia
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Elamri, D; Aouni, M; Parnaudeau, Sylvain; Le Guyader, Soizick.
Aims: The aim of this study was to detect the main pathogenic human RNA enteric viruses able to persist in the environment such as astrovirus, enterovirus, norovirus and hepatitis A virus (HAV) in shellfish collected from two locations in northern Tunisia.   Methods and Results: Viruses were eluted from digestive tissues and concentrated by polyethylene glycol precipitation before nucleic acid extraction and purification. After checking for inhibitors, all viruses were detected by reverse transcription-polymerase chain reaction (RT-PCR) and confirmed by hybridization. Overall, 83% of the samples were found positive for at least one virus. Astrovirus was detected in 61% of the samples, norovirus in 35% and HAV in 26%. Surprisingly, only one sample was found...
Tipo: Text
Palavras-chave: Shellfish; Reverse transcription PCR; Human enteric viruses.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1881.pdf

Problèmes de santé publique liés à la consommation de fruits de mer
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lupo, Coralie; Angot, J.-l.
Seafood could be a solution to meet global food demand that will double by 2050. Seafood includes a wide variety of edible marine organisms, except fish and mammals. These are molluscs, crustaceans, echinoderms and algae. Like any food, seafood can involve hazards transmitted to humans through food, which affect the health of the consumer. These hazards are both biological (viruses, bacteria, parasites) and chemical (toxins, allergens, chemicals, microplastics). The exposure of populations to these hazards through seafood consumption can be notably explained by their mode of production and the dietary habits. Firstly, the sanitary quality of products reflects the quality of the aquatic environment from which they are taken, which can be contaminated by...
Tipo: Text
Palavras-chave: Crustacea; Food safety; Mollusca; Seaweed; Shellfish.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00656/76812/77984.pdf

Vibrio aestuarianus subsp. cardii subsp. nov., pathogenic to the edible cockles Cerastoderma edule in France, and establishment of Vibrio aestuarianus subsp. aestuarianus subsp. nov. and Vibrio aestuarianus subsp. francensis subsp. nov.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Celine; Mesnil, Aurelie; Tourbiez, Delphine; Moussa Pouly, Mirna; Dubreuil, Christine; Gonçalves De Sa, Amélie; Chollet, Bruno; Godfrin, Yoann; Dégremont, Lionel; Serpin, Delphine; Travers, Marie-agnes.
Cockle mortality events have been reported in northern France since 2012. In the present study, we describe and investigate the implication of a potential bacterial causative agent in cockle mortality. Bacteria isolated from five different cockle mortality events were characterized and studied. Using phenotypic analysis combined with DNA–DNA hybridization (DDH) and whole genome sequencing, the isolates were shown to belong to Vibrio aestuarianus , a species regularly detected in France during oyster mortality events. Comparison of the strains from cockles with strains from French oysters and the type strain showed that the strains from cockles were genetically different to those from oysters and also different to the V. aestuarianus type strain. Moreover,...
Tipo: Text
Palavras-chave: Bacterial pathogen; Bivalvia; Cockle; Mortality; Shellfish; Vibrio aestuarianus.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78893/81195.pdf

Environmental drivers explain regional variation of changes in fish and invertebrate functional groups across the Mediterranean Sea from 1994 to 2012
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Brind'Amour, Anik; Rochet, Marie-joelle; Ordines, Francesc; Hosack, Geoff; Berthele, Olivier; Merigot, Bastien; Carbonara, Pierluigi; Follesa, Maria Cristina; Jadaud, Angelique; Lefkaditou, Evgenia; Maiorano, Porzia; Peristeraki, Panagiota; Mannini, Alessandro; Rabiller, Manuella; Spedicato, Maria Teresa; Tserpes, George; Trenkel, Verena.
Functional groups are sets of species that play a similar role in a food web. We defined functional groups of fish species based on their morphological characteristics, while using expert knowledge for invertebrates. We measured 9 morphological traits of 72 fish species, and carried out multivariate analyses to assign fish species to functional groups. The analysis identified 9 trait-based fish functional groups to which were added 3 expert-based invertebrate functional groups. The habitat (position in the water column) and potential diet of each group were identified from the literature. Using the MEDITS bottom trawl survey data collected at 10 to 800 m depth, we calculated relative change in the 12 fish and invertebrate functional group biomasses for 12...
Tipo: Text
Palavras-chave: Morphological traits; Community models; Functional network; Functional groups; Mediterranean Sea; Temporal trends; Fish; Shellfish.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00363/47382/47475.pdf

Poissons et invertébrés au large des côtes de France. Indicateurs issus des pêches scientifiques. Bilan 2004
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bertrand, Jacques; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lobry, Jeremy; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves; SIH-C.
The integration of fishing management into the ecosystemic approach has been recommended for many years by international consultative bodies; it is also written into international conventions and agreements. The implementation of the ecosystemic approach involves the development of programmes for monitoring exploited ecosystems in order to measure the effects of management steps. Plotting the results of these observations for operational reasons requires formalizing summary performance indicators.  IFREMER has carried out halieutic observation campaigns for some twenty years along the coasts of France from oceanographic ships and chartered ships. The objective of these campaigns is to produce abundance indices of species that are of halieutic interest....
Tipo: Text
Palavras-chave: Ecosystem; Indicating; Scientific survey; Scientific research; Fishing; English Channel; Bay of Biscay; France; Shellfish; Fish; Invertébrés; Poissons; Ecosystème; Indicateur; Campagne océanographique; Recherche scientifique; Pêche halieutique; Pêche; Mer du nord; Golfe de gascogne; Manche; France.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-2327.pdf

La pêche de loisir dans le golfe du Morbihan
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boude, Jp; Lesueur, M; Daures, Fabienne; Guyader, Olivier; Drouot, Bruno.
Leisure fishing, open to everyone and without a license, is a leisure activity in which many people are interested. Conversely to other harvesting activities such as fresh water fishing and hunting, it has practically not been studied until now (Appéré et Bonnieux, 2002). This study, dedicated to practice of leisure fishing at sea in the Gulf of Morbihan, set itself several objectives: - collect and assemble the available knowledge on regulations and practice of maritime leisure fishing - assess the amount of harvesting of certain recreational types of fishing and the economic impact generated by this activity, - highlight the problems of existing or potential cohabitations among the various users of the space and resources in the Gulf. - develop an...
Tipo: Text
Palavras-chave: Economic evaluation; Shellfish; Clams; Morbihan bay; Brittany; Leisure fishing; Cout de transport; Palourdes; Interactions; Conflits d'usage; Evaluation economique; Impact sur la ressource; Reglementation; Peche en bateau; Peche de plaisance; Peche à pied; Peche de loisir; Activités de peche; Golfe du morbihan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2244.pdf

Essais de decontamination des huitres Crassostrea gigas en bassin par renouvellement et circulation de l''eau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Faury, Nicole; Masson, Daniel; Ratiskol, Jacqueline.
The germs decreasing of artificially contaminated oysters Crassostrea gigas has been studied in experimental tanks similar to a shellfish depuration plant, without any chemical or physical water treatment. The oyster were treated by three different water management pattern, compared to a control tank and the germs decreasing studied by MPN method of fecal Coliforms and Streptococus. As a result: 1) it appaears somewhat difficult to conclude in this first attempt about the most efficient treatment. 2) the most important factor in shellfish depuration working is obviously the physiological activity (and stage) of the animals.
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Methodology; Raceway culture; Recirculating systems; Water management; Oyster fisheries; Marine molluscs; Shellfish; Tanks; Self purification.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1611.pdf

Microbial impact of small tributaries on water and shellfish quality in shallow coastal areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Riou, Philippe; Le Saux, Jean-claude; Dumas, Franck; Caprais, Marie-paule; Le Guyader, Soizick; Pommepuy, Monique.
This study aimed to investigate the impact of small tributaries on seawater and shellfish quality in coastal area subjected to brief episodes leading to fecal contamination. Escherichia coli and F-RNA-specific bacteriophages were selected as fecal indicators and astroviruses were chosen as being representative of pathogens in the human population during winter viral epidemics. A two-dimensional hydrodynamic model was built to simulate the current and dispersion in the model domain, which includes areas uncovered at low tide. The model also includes decay rates to simulate microorganism behavior and assess the influence of fecal input on shellfish quality. The originality lies in the fact that specific features of the study area were considered. Modeling...
Tipo: Text
Palavras-chave: Shellfish; Astrovirus; F RNA specific; E. coli; Seawater fecal contamination; Modeling.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2675.pdf

Viral contamination and depuration of oysters under field conditions
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Boher, S; Piclet, Guy; Beril-stien, S; Masson, Daniel; Delonce, R; Biziagos, E; Schwartzbrod, L.
Shellfish consumption is clearly associated with the transmission of enteric viruses. The channel of transmission of enteric viruses to human beings could be decreased particularly if the systems of depuration of shellfish were optimized, standardized and if their viral efficiency was controlled. The purpose of this work was to study the contamination of oysters and to assess the efficiency of several depuration processes. Our study have demonstrated that in some cases, 50% of oysters samples contain enteric viruses or H.A.V. antigen and the quantities of viruses range from 17 to 246 FF for the rotaviruses and from 124 to 200 for the enteroviruses per 100 g of tissue. According to our results, the exclusive use of a bacteriological criterium to determine...
Tipo: Text
Palavras-chave: Rotavirus; Hepatitis A virus; Enterovirus; Crassostrea gigas; Bivalvia; Seafood; Bioassays; Cell culture; Viruses; Self purification; Viral diseases; Shellfish.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1615.pdf

Données économiques sur la conchyliculture française
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Antona, Martine.
15% of the shellfish production in France comes from natural deposits and the other 85% from farming. Years 1980-1990 showed a slight decrease in the shellfish production then a resurgence from 1985 onwards, an increase in the oyster production and a strong decrease in mussel production at the beginning of the 1980's followed by a resurgence due to the increase of open sea activity. In France, the shellfish market represents 300,000 tons, divided between oysters (40%), mussels (30%) and scallops (15%). Importations of mussels and scallops in order to supply the domestic market are important. On the other hand, external trade flows are very low as far as oysters are concerned: France is the only important market for oysters in Europe. (unverified OCR)
Tipo: Text
Palavras-chave: France; Shellfish; SEM; France; Conchyliculture.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/publication-3714.pdf

Etudes épidémiologiques sur l'importance des coquillages en tant que facteur d'exposition de l'hépatite A - Approche méthodologique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Miossec, Laurence.
Si les coquillages sont considérés depuis longtemps comme des aliments à risque parce que consommés le plus souvent crus, les études épidémiologiques précises et complètes font défaut pour évaluer la part réelle des coquillages comme facteur de risque de certaines pathologies. Ce document décrit et discute les différentes approches méthodologiques d'une enquête épidémiologique dont le but est d'évaluer le risque d'hépatite A lié à la consommation de coquillages. En France métropolitaine, l'hépatite A est une maladie peu fréquente. Les données d'incidence sont évaluées entre 11 et 22 cas pour 100 000 habitants. Elles sont, cependant, imprécises. Parmi les facteurs de risque les plus fréquemment cités au niveau national, on trouve la contamination lors de...
Tipo: Text
Palavras-chave: Hépatite A; Coquillages; Épidémiologie; Enquêtes cas-témoin; Enquêtes de cohorte; Épidémies. cas sporadiques.; Hepatitis A; Shellfish; Epidemiology; Case-control studies; Cohort studies; Outbreak; Sporadic cases.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00105/21576/19156.pdf

The behaviour of F specific bacteriophage in depurating shellfish with reference to their use as pollution indicator organisms
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lees, D; Dore, W.
The behaviour of sex-pilli specific (F+) bacteriophage during the depuration process was investigated using Pacific oysters (Crassostrea gigas) and edible mussels (Mytilus edulis) naturally contaminated with untreated sewage. F+ bacteriophage was eliminated considerably slower than E. coli. This effect was most pronounced in oysters which showed average T90 bacteriophage values of 62.5 hours compared with 11 hours for E. coli. F+ bacteriophage in mussels was largely confined to the digestive tract. The majority of E. coli were similarly located but, in contrast, counts were also distributed throughout the other internal tissues. Investigation of ultra-violet (UV) dosage showed that the difference in depuration rate was unlikely to be due to the higher...
Tipo: Text
Palavras-chave: Escherichia coli; Mytilus edulis; Crassostrea gigas; Bivalvia; Indicator species; Marine molluscs; Bacteriophages; Pollution indicators; Marine pollution; Shellfish; Self purification.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1605.pdf

Relance de l'huître plate. Rapport de synthèse des travaux 1990
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Martin, Anne-genevieve.
Une convention a été signée en 1990 avec la Région Bretagne pour financer la poursuite des recherches dans le but d'accélérer la relance de l'élevage de l'huître plate, à la suite de la deuxième épizootie due à un protozoaire, Bonamia ostreae. Ce rapport présente les travaux réalisés et les résultats acquis durant l'année 1990, dans les domaines de l'épidémiologie descriptive, de la zootechnie, de la génétique (recherche d'espèces ou de souches résistantes) et de l'immuno-pathologie (étude de la maladie et des mécanismes de défense des mollusques).  Durant l'année 1990, la situation épidémiologique des élevages d'huîtres plates en eau profonde a évolué différemment selon les secteurs: relativement stable en Baie du Mont st Michel, elle présente de brusques...
Tipo: Text
Palavras-chave: Bivalves; Ostrea edulis; Bonamia ostreae; Épidémiologie; Pathologie; Immunologie; Génétique; Échantillonnage; Élevage; Shellfish; Ostrea edulis; Bonamia ostreae; Epidemiology; Pathology; Immunology; Genetic; Sampling; Rearing.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00102/21320/18942.pdf

Occurrence of Bacterial Pathogens and Human Noroviruses in Shellfish-Harvesting Areas and Their Catchments in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rince, Alain; Baliere, Charlotte; Hervio-heath, Dominique; Cozien, Joelle; Lozach, Solen; Parnaudeau, Sylvain; Le Guyader, Francoise S.; Le Hello, Simon; Giard, Jean-christophe; Sauvageot, Nicolas; Benachour, Abdellah; Strubbia, Sofia; Gourmelon, Michele.
During a 2-year study, the presence of human pathogenic bacteria and noroviruses was investigated in shellfish, seawater and/or surface sediments collected from three French coastal shellfish-harvesting areas as well as in freshwaters from the corresponding upstream catchments. Bacteria isolated from these samples were further analyzed. Escherichia coli isolates classified into the phylogenetic groups B2, or D and enterococci from Enterococcus faecalis and E. faecium species were tested for the presence of virulence genes and for antimicrobial susceptibility. Salmonella members were serotyped and the most abundant serovars (Typhimurium and its monophasic variants and Mbandaka) were genetically characterized by high discriminative subtyping methods....
Tipo: Text
Palavras-chave: Campylobacter; Salmonella; Vibrio; HuNoVs; Fecal bacterial indicators; Shellfish; Water.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00461/57243/59243.pdf

Hazard analysis critical control points (HACCPs) and verification studies at shellfish depuration plants in the USA
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Furfari, S; Kelley-reitz, R; Dowgert, M.
This article describes the requirements of the Manual of Operations, Part 2 of the National Shellfish Sanitation Program, for conducting verification studies at depuration plants for molluscan shellfish. This article also describes the effect of the Hazard Analysis Critical Control Points (HACCPs) on such studies, and how to plan studies on new or existing plants. Methods are described for analyzing the various facets of the physical plant, such as sea water systems, tank construction, and other pertinent facilities. Of equal importance, methods are described for investigating and analyzing the various critical control points of the operation of the plant. Studies at a soft clam depuration plant are used as a model for this article. The most important...
Tipo: Text
Palavras-chave: Bivalvia; Pollution monitoring; Marine molluscs; Self purification; Shellfish.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1617.pdf

Development of a HACCP-based program for a private shellfish purification facility
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Howell, T; Jones, S; Nardi, G.
A HACCP-based program is developed for the Spinney Creek Oyster Company (SCOC) Shellfish Purification Facility under a pilot program funded and implemented by the New England Fisheries Development Association (NEFDA). The SCOC Facility, which includes a government approved in-house coliform laboratory, is fully licensed for oysters and clams under State of Maine and NSSP regulations. SCOC's business is producing value-added, quality-assured shellfish for premium, health conscious markets. To accomplish this, SCOC uses shellfish harvested from approved waters which is an important distinction from other purification plants which process shellfish originating from restricted waters. It was necessary to create a flow chart of the various steps involved in the...
Tipo: Text
Palavras-chave: Bivalvia; Pollution control; Public health; Methodology; Self purification; Shellfish; Marine molluscs.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1608.pdf

Norovirus and Other Human Enteric Viruses in Moroccan Shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benabbes, Laila; Ollivier, Joanna; Schaeffer, Julien; Parnaudeau, Sylvain; Rhaissi, Houria; Nourlil, Jalal; Le Guyader, Soizick.
The aim of this study was to evaluate the presence of human enteric viruses in shellfish collected along the Mediterranean Sea and Atlantic Coast of Morocco. A total of 77 samples were collected from areas potentially contaminated by human sewage. Noroviruses were detected in 30 % of samples, with an equal representation of GI and GII strains, but were much more frequently found in cockles or clams than in oysters. The method used, including extraction efficiency controls, allowed the quantification of virus concentration. As in previous reports, results showed levels of contamination between 100 and 1,000 copies/g of digestive tissues. Sapoviruses were detected in 13 % of samples mainly in oyster and clam samples. Hepatitis A virus was detected in two...
Tipo: Text
Palavras-chave: Shellfish; Norovirus; Hepatitis A virus; Environmental conditions; Quantification; Morocco.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00130/24102/22489.pdf

Défis de la surveillance des maladies chez les coquillages marins en France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lupo, Coralie; Francois, Cyrille; Arzul, Isabelle; Garcia, Celine; Joly, Jean-pierre; Renault, Tristan.
The basic concepts and objectives of animal disease surveillance are common to all types of animal production. Yet, the procedures for implementation have been mostly developed for terrestrial animal productions. Disease surveillance in marine shellfish calls for specific measures in view of the peculiarities of marine biology and rearing techniques. The main objective of disease surveillance in marine shellfish is to detect as early as possible exotic and newly emerging diseases. With this objective in mind, a national surveillance network for surveillance of mollusc diseases called Repamo has been developed. It combines passive reporting and risk-based surveillance.
Tipo: Text
Palavras-chave: Surveillance; Coquillage; Milieu marin; Détection précoce; Epidémiologie; Surveillance; Shellfish; Marine environment; Early detection.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/22023/19653.pdf

Evaluation of viral shellfish depuration in a semi-professional tank
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pommepuy, Monique; Caprais, Marie-paule; Le Saux, Jean-claude; Le Mennec, Cecile; Parnaudeau, Sylvain; Madec, Yvon; Monier, Martial; Brest, Goulven; Le Guyader, Francoise.
Depuration processes try to eliminate microorganisms using seawater to allow living, filter-feeding shellfish to naturally purge themselves from agents they accumulated from the environment. Until now the only parameter to evaluate depuration was the decrease in E. coli counts. Studies have shown that viruses can persist in the environment longer than E. coli and that shellfish meeting the endstandard (&lt; 230 E.colil /100g) have been involved in viral outbreaks. Starting in February 2000, the European Commission has been funding (Fifth Framework Programme), a 3-year project entitled "Virus Safe Seafood". One of the specific objectives of this project is to innovate technology for shellfish depuration. For this purpose a depuration system was designed and...
Tipo: Text
Palavras-chave: Bacteriophage FRNA; Depuration; Shellfish.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/acte-1208.pdf

Inadequacy of bacterial indicators for assessing elimination rates of viruses from molluscan shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Burkhardt, W; Watkins, W; Rippey, S.
The reported incidence of shellfish-borne illness in the United States increased dramatically during the last decade. Most of the outbreaks are attributed to diseases of viral aetiology. These human health problems result primarily from the ingestion of raw shellfish which have accumulated enteric pathogens from environmental waters or from wet storage facilities. Our studies have demonstrated that hard-shelled clams concentrate different indicator micro-organisms at variable and unpredictable rates during the year. In temperate waters, this has been observed at two abbreviated periods in mid-spring and again in late fall when accumulation rates increased dramatically. Moreover, these rates were not generally coincident for viruses and bacteria. In...
Tipo: Text
Palavras-chave: Mollusca; Intestinal microflora; Phages; Seafood; Public health; Diseases; Marine molluscs; Viruses; Shellfish; Self purification; Bacteria; Indicator species.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-1609.pdf

Latitudinal influence on gametogenesis and host–parasite ecology in a marine bivalve model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mahony, Kate E.; Lynch, Sharon A.; Egerton, Sian; Laffan, Rebecca E.; Correia, Simão; De Montaudouin, Xavier; Mesmer‐dudons, Nathalie; Freitas, Rosa; Culloty, Sarah C.
Reproduction and parasites have significant impacts on marine animal populations globally. This study aimed to investigate the associative effects of host reproduction and a host–parasite interplay on a marine bivalve, along a geographic gradient of latitude. Cockles Cerastoderma edule were sampled from five European sites (54°N to 40°N), between April 2018 and October 2019. A histological survey provided data on trematode (metacercaria and sporocyst life stages), prevalence, and cockle stage of gametogenesis to assess the influence of a latitudinal gradient on both interplays. Sex ratios at the northernmost sites were skewed toward females, and spawning size was reduced at the lower latitudes. Trematode infection did not follow a latitudinal gradient....
Tipo: Text
Palavras-chave: Boom and bust; Cockles; Fisheries; Latitude; Parasite–host interactions; Reproduction; Shellfish; Spatial variation; Trematodes.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00691/80352/83454.pdf

Polyploid fish and shellfish: Production, biology and applications to aquaculture for performance improvement and genetic containment
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Piferrer, Francesc; Beaumont, Andy; Falguiere, Jean-claude; Flajshans, Martin; Haffray, Pierrick; Colombo, Lorenzo.
Polyploids can be defined as organisms with one or more additional chromosome sets with respect to the number most frequently found in nature for a given species. Triploids, organisms with three sets of homologous chromosomes, are found spontaneously in both wild and cultured populations and can be easily induced in many commercially relevant species of fish and shellfish. The major consequence of triploidy is gonadal sterility, which is of advantage in the aquaculture of molluscs since it can result in superior growth. In fish, the induction of triploidy is mainly used to avoid problems associated with sexual maturation such as lower growth rates, increased incidence of diseases and deterioration of the organoleptic properties. Triploidy can also be used...
Tipo: Text
Palavras-chave: GMO; Transgenic containment; Genetic containment; Reproductive containment; Hybridisation; Sterility; Fish; Shellfish; Fish farming; Aquaculture; Tetraploidy; Triploidy; Polyploidy.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6648.pdf

Processing Strategies to Inactivate Enteric Viruses in Shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Richards, Gary P.; Mcleod, Catherine; Le Guyader, Soizick.
Noroviruses, hepatitis A and E viruses, sapovirus, astrovirus, rotavirus, Aichi virus, enteric adenoviruses, poliovirus, and other enteroviruses enter shellfish through contaminated seawater or by contamination during handling and processing, resulting in outbreaks ranging from isolated to epidemic. Processing and disinfection methods include shellfish depuration and relaying, cooking and heat pasteurization, freezing, irradiation, and high pressure processing. All the methods can improve shellfish safety; however, from a commercial standpoint, none of the methods can guarantee total virus inactivation without impacting the organoleptic qualities of the shellfish. Noroviruses cause the majority of foodborne viral illnesses, yet there is conflicting...
Tipo: Text
Palavras-chave: Shellfish; Processing; Norovirus; Hepatitis A virus; Depuration; High pressure; Heat inactivation.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12253/9199.pdf

Phycotoxin monitoring in France : risk-based strategy and main results (2006-2008)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Belin, Catherine; Amzil, Zouher.
Toxin monitoring is carried out along the coasts of France by a national network, REPHY, which is the National Monitoring Network for Phytoplankton and Phycotoxins. Sampling strategy differs according to the type of zone coastal or offshore and to the family of toxins. For PSP and ASP toxins, monitoring is based on the detection of toxic phytoplankton species. For lipophilic toxins, a systematic analysis of toxins is performed in risk areas during high risk periods. Experimental monitoring for palytoxins has also been conducted along the Mediterranean coast since 2007. The total number of toxin analyses is in the order of 2500 to 3000 per year. The detailed results for each family of toxins showed that the most frequent toxic events for the period from...
Tipo: Text
Palavras-chave: Monitoring; Phytoplankton; Toxin; Sampling; Shellfish; French coasts.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00077/18821/16398.pdf

Azaspiracid Toxins: Toxicological Profile
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hess, Philipp; Twiner, Michael J; Kilcoyne, Jane; Sosa, Sylvio.
Azaspiracids (AZAs) are a toxin group that originate from marine dinoflagellates of the genera Azadinium and Amphidoma. After accumulation of these toxins in edible marine organisms and their subsequent consumption, humans develop a gastrointestinal syndrome referred to as azaspiracid shellfish poisoning (AZP). This syndrome is very similar to diarrheic shellfish poisoning (DSP), with main symptoms appearing after a few hours from consumption and including diarrhea, vomiting, and stomach cramps. Due to extensive metabolism in shellfish, more than 30 analogues have been reported to date, and purified compounds for selected analogues have recently been made available for toxicological studies. Currently, only AZA1, AZA2, and AZA3 are regulated in Europe and...
Tipo: Text
Palavras-chave: Azaspiracids; Azaspiracid shellfish poisoning; Harmful algae; Azadinium; Shellfish.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00320/43146/42744.pdf

Bilan 2006 du réseau Repamo. Réseau national de surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Francois, Cyrille; Garcia, Celine; Labrut, Sophie; Miossec, Laurence; Arzul, Isabelle; Joly, Jean-pierre; Chollet, Bruno; Robert, Maeva; Ferrand, Sylvie.
Created in 1992, the REPAMO network (Network of mollusc pathology), is a national zoosanitary surveillance network of shellfish health status along the French coasts. Its activities are in keeping with two European Directives, 91/67/EEC and 95/70/EC and are a part of the institutional tasks of Ifremer. The aims of the network are to prevent the introduction and spread of exotic  pathogens and to survey the evolution ofnotifiable pathogens already present in France. The network focused on the survey of listed diseases (bonamiosis and marteiliosis of flat oyster) in two areas under agreement process (zone X and Granville bed in zone IX). In 2006, only samples of the Granville bed could be analysed due to the difficulty to obtain flat oysters (sparse oyster...
Tipo: Text
Palavras-chave: Health status; Shellfish; Molluscs; Pathology; Surveillance; Network; État de santé; Coquillages; Mollusques; Pathologie; Surveillance; Réseau.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-3812.pdf

Modeling of Escherichia coli Fluxes on a Catchment and the Impact on Coastal Water and Shellfish Quality
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bougeard, Morgane; Le Saux, Jean-claude; Perenne, Nicolas; Baffaut, Claire; Robin, Marc; Pommepuy, Monique.
The simulation of the impact of Escherichia coli loads from watersheds is of great interest for assessing estuarine water quality, especially in areas with shellfish aquaculture or bathing activities. For this purpose, this study investigates a model association based on the Soil and Water Assessment Tool (SWAT) coupled with a hydrodynamic model (MARS 2D; IFREMER). Application was performed on the catchment and estuary of Daoulas area (France). The daily E. coli fluxes simulated by SWAT are taken as an input in the MARS 2D model to calculate E. coli concentrations in estuarine water and shellfish. Model validation is based on comparison of frequencies: a strong relationship was found between calculated and measured E. coli concentrations for river quality...
Tipo: Text
Palavras-chave: SWAT; Watershed; Estuary modeling; E coli; Shellfish; Water quality.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14393/11728.pdf

Comment améliorer la précocité de l'alerte en conchyliculture ? Exemple des mortalités de moules en 2014 dans les Pertuis Charentais
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lupo, Coralie; Prou, Jean.
Surveillance of shellf ish health is based on clinical surveillance of shellfish mortality, including a detection phase and a mandatory notification phase. While control measures are limited, early detection of pathogens is a challenge which needs to be met. The relevance and feasibility of an enhanced clinical surveillance based on phone interviews were studied. The results made it possible to reconstruct the spatial and temporal evolution of the outbreaks of mussel mortality which occurred in Pertuis Charentais in 2014. Moreover, a qualitative analysis of the interviews revealed contextual elements that were used to enhance the previous description and to devise causal scenarios which could be used as research hypotheses. By incorporating the...
Tipo: Text
Palavras-chave: Coquillages; Moules; Investigation épidémiologique; Perception; Alerte précoce; Surveillance événementielle renforcée; Shellfish; Mussels; Epidemiological investigation; Perception; Early warning; Enhanced clinical surveillance.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38091/36237.pdf

First isolation of Shiga toxin 1d producing Escherichia coli variant strains in shellfish from coastal areas in France
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gourmelon, Michele; Montet, M; Lozach, Solen; Le Mennec, Cecile; Pommepuy, Monique; Beutin, L; Vernozy Rozand, C.
Aims: This study was carried out to evaluate the presence of Shiga toxin-producing Escherichia coli (STEC) and E. coli O157:H7 in shellfish from French coastal environments.   Methods and Results: Shellfish were collected in six growing areas or natural beds (B category) and nonfarming areas (D category) from July 2002 to August 2004. PCR detection of stx genes was performed on homogenized whole shellfish and digestive gland tissues enrichments. STEC strains were detected by colony DNA hybridization using a stx-specific gene probe and E. coli O157 strains were additionally searched by immunomagnetic separation with O157-specific magnetic beads. Stx genes were detected in 40 of 144 (27.8%) sample enrichments from mussels, oysters or cockles, 32 of 130...
Tipo: Text
Palavras-chave: Shiga like toxin producing E. coli; Shellfish farming areas; Shellfish; Escherichia coli O157; Coastal environment.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1096.pdf

Bilan 2005 du réseau REPAMO - Réseau national de surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Garcia, Celine; Arzul, Isabelle; Chollet, Bruno; Ferrand, Sylvie; Francois, Cyrille; Joly, Jean-pierre; Miossec, Laurence; Robert, Maeva; Cuvelier, Nicolas; Lefebvre, Alain; Le Gagneur, Eric; Ropert, Michel; Mouillard, Gilbert; Gerla, Daniel; Le Gal, Dominique; Rocher, Gregory; Langlade, Aime; Bedier, Edouard; Nourry, Max; Martin, Jean-louis; Chabirand, Jean-michel; Fillon, Alain; Robert, Stephane; Courtois, Olivier; D'Amico, Florence; Rumebe, Myriam; Pichot, Yves; Le Gall, Patrik.
Created in 1992, the REPAMO network (Network of mollusc pathology), is a national zoosanitary surveillance network of shellfish health status along the French coasts. Ils activities are in keeping with two European Directives, 91167/EEC and 95170/EC and are a part of the institutional tasks of Ifremer. The aims of the network are to prevent the introduction and spread of exotic pathogens and to sm'vey the evolution of notifiable pathogens already present in France. The network focused on the survey of listed diseases (bonamiosis and marteiliosis of flat oyster) in two areas under agreement process (Granville bed and zone X). In 2005, only samples of the Granville bed could be analysed due to the difflculty to obtain flat oysters (sparse oyster beds, beds...
Tipo: Text
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Etat de santé; Network; Surveillance; Pathology; Molluscs; Shellfish; Health status.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00086/19704/17346.pdf

Optimization of PMAxx pretreatment to distinguish between human norovirus with intact and altered capsids in shellfish and sewage samples
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Randazzo, Walter; Khezri, Mohammad; Ollivier, Joanna; Le Guyader, Soizick; Rodriguez-diaz, Jesus; Aznar, Rosa; Sanchez, Gloria.
Shellfish contamination by human noroviruses (HuNoVs) is a serious health and economic problem. Recently an ISO procedure based on RT-qPCR for the quantitative detection of HuNoVs in shellfish has been issued, but these procedures cannot discriminate between inactivated and potentially infectious viruses. The aim of the present study was to optimize a pretreatment using PMAxx to better discriminate between intact and heat-treated HuNoVs in shellfish and sewage. To this end, the optimal conditions (30 min incubation with 100 μM of PMAxx and 0.5% of Triton, and double photoactivation) were applied to mussels, oysters and cockles artificially inoculated with thermally-inactivated (99 °C for 5 min) HuNoV GI and GII. This pretreatment reduced the signal of...
Tipo: Text
Palavras-chave: Intercalating dyes; Viability PCR; Norovirus; Shellfish; Sewage; RT-qPCR.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00411/52208/52970.pdf

Shellfish monitoring for lipophilic phycotoxins in France, recommendation for an updated sampling strategy
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Thebault, Anne; Arnich, Nathalie; Belin, Catherine; Neaud-masson, Nadine.
In France, the sampling strategy for the official monitoring of lipophilic phycotoxins in bivalve shellfish relies on the definition of risk areas and high risk periods, during which a systematic weekly analysis of toxins in shellfish is performed. Since 2010, high risk periods are defined as follows: the occurrence of one result above the European regulatory limit (160 μg equivalent okadaic acid/kg shellfish) over the last 3 years leads to that month being considered a high risk period. This definition was established according to a statistical analysis of the official monitoring results for the period 2003-2008, based on the mouse bioassay (MBA) as the official analytical method. As of the 1st January 2010, the MBA has been replaced by LC-MS/MS. In 2014,...
Tipo: Text
Palavras-chave: Monitoring; Shellfish; Lipophilic phycotoxins; Bayesian inference.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00393/50470/51205.pdf

Diversity of enterovirus sequences detected in oysters by RT-heminested PCR
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Dubois, Eric; Merle, Ghislaine; Roquier, Catherine; Trompette, Aurélien; Le Guyader, Soizick; Cruciere, Catherine; Chomel, Jean-jacques.
Oysters harvested in western France, from five sites associated with outbreaks of food-borne norovirus gastroenteritis between February 2000 and March 2001, were assayed for enterovirus RNA by reverse transcriptase-heminested polymerase chain reaction (RT-heminested PCR). Forty percent (21/52) of shellfish samples (pool of seven oysters) were contaminated by enteroviruses. Infectious coxsackieviruses serotype A21 were isolated from three of these positive samples. Amplicons corresponding to 65 base sequences in the 5' untranslated region of the enteroviral genome were analyzed by direct sequencing. Interpretable results were obtained from 18 amplicons, but mixtures of sequences confused the results from 3 samples. Sequences isolated from samples from the...
Tipo: Text
Palavras-chave: Sequence analyze; RT PCR; Cell culture; Shellfish; Enterovirus.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-763.pdf

Bilan 2003 du réseau REPAMO - Réseau national de surveillance zoosanitaire des mollusques marins
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Arzul, Isabelle; Garcia, Celine; Joly, Jean-pierre; Miossec, Laurence; Chollet, Bruno; Robert, Maeva; Cuvelier, Nicolas; Lefebvre, Alain; Le Gagneur, Eric; Kopp, Joel; Mouillard, Gilbert; Gerla, Daniel; Le Saux, Jean-claude; Raguenes, Pierre; Le Gal, Dominique; Langlade, Aime; Bedier, Edouard; Nourry, Max; Martin, Jean-louis; Fillon, Alain.
The REPAMO network (network ofmollusc pathology), created in 1986, ensures the survey of shellfish health status along French coasts according? to European Directives 91/67/EEC and 95/70/EEC. The aims of the network are 1 - to prevent the introduction and spread of exotic pathogens, 2-to study the means to decrease the impact of pathogens already present and to survey their evolution. In 2003, the REPAMO network focused on the survey oflisted diseases (bonamiosis and marteiliosis) in two areas under agreement process (Banc de Granville and zone X) and on the study of abnormal morlalities. Number of reported abnormal morlalities has increased in 2003. This rise can be partly explained by the recent network restructuring, but also by the summer heatwave and...
Tipo: Text
Palavras-chave: Réseau; Surveillance; Pathologie; Mollusques; Coquillages; Etat de santé; Network; Surveillance; Pathology; Molluscs; Shellfish; Health status.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00086/19699/17340.pdf

La mytiliculture en Hollande et en Espagne
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Antona, Martine; Paquotte, Philippe.
This article is the second part of an analysis of mussel-farming sectors in France, Holland and Spain. The first part, devoted to France, addressed the national offering's stresses of adapting to changes in the mussel market. From the viewpoint of questions raised within the profession while preparing the French mussel-farming sector for the regulatory and economic environment of 1992, Spain and Holland offer benchmarks in terms of structuring the offer and planning markets. This article presents the mussel-farming business in Spain and Holland from these two angles.
Tipo: Text
Palavras-chave: Economic evaluation; Urshin; Clams; Shellfish; Fleets; Metier; Fishing activities; Bay of Morbihan; Brittany; SEM; Cout; Indicateurs economique; Palourde; Oursin; Bivalves; Typologie; Flottilles; Metier; Activités de pêche; Golfe du Morbihan.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-2252.pdf

Environmental Conditions Leading to Shellfish Contamination and Related Outbreaks
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Maalouf, Haifa; Pommepuy, Monique; Le Guyader, Soizick.
Human fecal wastes contain a large variety of viruses that can enter the environment through discharge of waste materials from infected individuals. Despite the high diversity of viruses that are introduced into the environment by human fecal pollution, only a few have been recognized to cause disease in association with consumption of contaminated shellfish. To explain bivalve mollusks contamination, several factors including human epidemiology, virus persistence through sewage treatment plant, and shellfish uptake may be suggested. Considering different outbreaks described in the literature, the most common route for transmission is accidental contamination after heavy rainfall, when extra loads cause an overflow, and release of untreated sewage into the...
Tipo: Text
Palavras-chave: Shellfish; Outbreaks; Norovirus; Environmental conditions.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12252/9031.pdf

Manual for using REPHYTOX Data. Information to improve the understanding of REPHYTOX data files available to scientists and the public
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Ifremer, ODE/VIGIES, REPHY-REPHYTOX national coordination &amp; Quadrige administration unit.
REPHYTOX (Monitoring Network for Phycotoxins in marine organisms) is a network implemented by Ifremer. The data acquired by REPHYTOX have been banked since 1987 in the Quadrige database. This manual is intended for users of REPHYTOX data, which are made available on the internet from SEANOE. The Quadrige database is a component of the French Water Information System and its mission is to manage and exploit data from numerous coastal monitoring networks. SEANOE (Sea scientific open data publication) is a publisher of scientific data in the field of marine sciences. The REPHYTOX dataset available in SEANOE makes available all REPHYTOX data for the French metropolis, for years prior to the current year, in the form of fixed files, with an annual update. The...
Tipo: Text
Palavras-chave: REPHYTOX; Data; Quadrige; SEANOE; DOI; Phycotoxins; DSP; PSP; ASP; Palytoxins; Shellfish; Coastal waters.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00409/52019/52677.pdf

Perfluoroalkyl substances (PFASs) in the marine environment: Spatial distribution and temporal profile shifts in shellfish from French coasts
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Munschy, Catherine; Bely, Nadege; Pollono, Charles; Aminot, Yann.
Perfluoroalkyl substances (PFASs) were investigated in filter-feeding shellfish collected from 2013 to 2017 along the English Channel, Atlantic and Mediterranean coasts of France. PFOS (perfluorooctane sulfonate), PFTrDA (perfluorotridecanoic acid), PFTeDA (perfluorotetradecanoic acid), PFDoDA (perfluorododecanoic acid) and PFUnDA (perfluoroundecanoic acid) were detected in more than 80% of samples, thus indicating widespread contamination of the French coastal environment by these chemicals. The distribution of PFAS concentrations showed differences according to sampling locations and years. PFOS was the predominant PFAS in most samples collected from English Channel and Atlantic coasts until 2014, but the opposite was observed in 2015, 2016 and 2017,...
Tipo: Text
Palavras-chave: PFOS; PFCAs; Shellfish; Levels; Profiles; Temporal trends.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00491/60281/63706.pdf

Successful detection of pathogenic Shiga-toxin-producing Escherichia coli in shellfish, environmental waters and sediment using the ISO/TS-13136 method
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Baliere, Charlotte; Rince, Alain; Thevenot, Delphine; Gourmelon, Michele.
The presence of highly pathogenic Shiga-toxin-producing Escherichia coli (STEC) in shellfish, upstream waters and sediment from coastal shellfish sites was evaluated using the ISO/TS-13136 method. Shellfish (oysters, mussels and cockles), water and sediment samples were collected monthly over a period of 1 year. The method used real-time PCR detection of stx1, stx2 and eae genes and genetic markers corresponding to the five major serogroups (O157, O26, O103, O111 and O145) on enrichment broths and the identification of STEC when these genes and markers were detected. stx genes were detected in the broth of 33% of shellfish batches (n = 126), 91% of water samples (n = 117) and 28% of sediment (n = 39). One stx1+, eae+ O26:H11 strain was isolated from a...
Tipo: Text
Palavras-chave: Eae; Sediment; Shellfish; Shiga-toxin-producing Escherichia coli; Stx; Water.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00250/36124/34975.pdf

Etudes des activites de peche dans le golfe du Morbihan, peche professionnelle
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Peronnet, Isabelle; Talidec, Catherine; Daures, Fabienne.
The objective of the study is to improve knowledge of coastal fishing activity in the halieutic and economic spheres. It consists of three sections: On-board professional fishing, professional shellfish gathering, and leisure fishing, this last one being the subject of an independent report (Lesueur and Drouot). The methodology applied is based on implementation of specific surveys about the ships that frequented the Gulf of Morbihan in 2001. The emphasis was placed on identifying the occupations practiced in this zone, on describing these activities and their intensity as well as on analysing the economic performance of these fleets. The management methods, regulation of shellfish gathering on listed sites as well as their impacts on the environment are...
Tipo: Text
Palavras-chave: Urshin; Clams; Shellfish; Fleets; Metiers; Fishing activities; Bay of Morbihan; Brittany; Structure de cout; Oursin; Palourde; Bivalves; Typologie; Flottilles; Metiers; Indicateurs; Activités de peche; Golfe du Morbihan.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2265.pdf

Prediction of faecal contamination in shellfish production areas: Interest and limits of the salinity parameter
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Saux, Jean-claude; Le Vaillant, Gael; Guillermou, Ghislain; Vilbas, Jean-valere; Deter, Julie; Delyon, Bernard; Le Guyader, Soizick; Pommepuy, Monique.
Estuarine areas are sensitive to rapid and punctual contamination linked to heavy rainfall inducing rapid fresh water input. Thus, the increase of seawater contamination may be linked to a salinity decrease. The objective of this study was to measure salinity variation as a proxy to evaluate the risk of faecal contamination. Salinity sensors were set up on shellfish beds in Daoulas estuary (Bay of Brest) and monitored every 10 min over a four year period. Precipitation and river flows were also recorded. Moreover E. coli concentrations and salinity were measured in the estuarine surface water during different hydrodynamic conditions and seasons. The results indicated a significant relationship between E. coli concentration and salinity in the estuary....
Tipo: Text
Palavras-chave: Salinity; Sensor; E. coli; Shellfish; Prediction; Alert; Daoulas estuary.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00066/17751/15273.pdf

The paralytic shellfish toxin, saxitoxin, enters the cytoplasm and induces apoptosis of oyster immune cells through a caspase-dependent pathway
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Abikhalil, Celina; Finkelstein, Darren S.; Conejero, Genevieve; Du Bois, Justin; Destoumieux-garzon, Delphine; Rolland, Jean-luc.
Exposure of the toxin-producing dinoflagellate Alexandrium catenella (A. catenella) was previously demonstrated to cause apoptosis of hemocytes in the oyster species Crassostrea gigas. In this work, a coumarin-labeled saxitoxin appeared to spread throughout the cytoplasm of the hemocytes. PSTs, including saxitoxin, were also shown to be directly responsible for inducing apoptosis in hemocytes, a process dependent on caspase activation and independent of reactive oxygen species (ROS) production. A series of in vitro labeling and microscopy experiments revealed that STX and analogs there of induced nuclear condensation, phosphatidylserine exposure, membrane permeability, and DNA fragmentation of hemocytes. Unlike in vertebrates, gonyautoxin-5 (GTX5), which...
Tipo: Text
Palavras-chave: Shellfish; Toxin; Harmful algae; Phytoplankton.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00391/50272/50905.pdf

Editorial: Remote Sensing for Aquaculture
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gernez, Pierre; Palmer, Stephanie C. J.; Thomas, Yoann; Forster, Rodney.
Tipo: Text
Palavras-chave: Earth observation; Site selection; HAB risk assessment; Production monitoring; Ecological modeling; Kelp; Fish; Shellfish.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00675/78753/80921.pdf

First report on azaspiracid and yessotoxin groups detection in French shellfish
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Amzil, Zouher; Sibat, Manoella; Royer, Florence; Savar, Veronique.
The French Phytoplankton and Phycotoxins monitoring network (REPHY) recently found positive or dubious negative shellfish samples using lipophilic toxins mouse bioassay. These samples were analyzed by liquid chromatography (LC) in combination with mass spectrometry (MS) to detect the following toxins: okadaic acid (OA), dinophysistoxins (DTXs), pectenotoxins (PTXs), azaspiracids (AZAs), yessotoxins (YTXs), spirolides (SPXs) and gymnodimines (GYMs). Over the 2006-2007 period, chemical analyses revealed various lipophilic toxin profiles according to shellfish sampling locations. In addition to OA and/or PTX-2 and their derivatives, several other compounds were found for the first time in France: (1) during the summer of 2006, AZA-1 and AZA-2 in Queen...
Tipo: Text
Palavras-chave: LC MS/MS analyses; Shellfish; Yessotoxin group; Azaspiracid group; Lipophilic toxins.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4560.pdf

Virus entériques humains et coquillages
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Parnaudeau, Sylvain; Le Mennec, Cecile; Miura, Takayuki; Le Saux, Jean-claude; Le Guyader, Soizick.
Human enteric viruses discharged in raw sewage are hightly resistant and may be detected in surface waters, coastal areas and shellfish. Whereas noroviruses, responsible for relatively benign acute gastroentritis, are the most common agents implicated in shellfish borne outbreaks, other human viruses which cause severe human diseases, such as hepatitis A virus, may also be transmitted. Environmental studies have demonstrated that virus concentrations detected in shellfish are higher than in surrounding waters. This concentration may explain the high prevalence of noroviruses detected in various shellfish species collected in different countries. If many questions remain regarding viral contamination of shellfish, the most important seems to be the...
Tipo: Text
Palavras-chave: Shellfish; Human enteric viruses; Norovirus; Hepatitis A virus; Coquillage; Virus entérique humain; Norovirus; Virus de l'hépatite A.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00317/42849/42258.pdf

Identification of the origin of faecal contamination in estuarine oysters using Bacteroidales and F-specific RNA bacteriophage markers
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mieszkin, Sophie; Caprais, Marie-paule; Le Mennec, Cecile; Le Goff, Manon; Edge, T. A.; Gourmelon, Michele.
Aims: The aim of this study was to identify the origin of faecal pollution impacting the Elorn estuary (Brittany, France) by applying microbial source tracking (MST) markers in both oysters and estuarine waters. Methods and Results: The MST markers used were as follows: (i) human-, ruminant- and pig-associated Bacteroidales markers by real-time PCR and (ii) human genogroup II and animal genogroup I of F-specific RNA bacteriophages (FRNAPH) by culture/genotyping and by direct real-time reverse-transcriptase PCR. The higher occurrence of the human genogroup II of F-specific RNA bacteriophages using a culture/genotyping method, and human-associated Bacteroidales marker by real-time PCR, allowed the identification of human faecal contamination as the...
Tipo: Text
Palavras-chave: Escherichia coli; Estuarine and river waters; F-specific RNA bacteriophages; Host-associated Bacteroidales markers; Microbial source tracking; Shellfish.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00153/26426/25250.pdf

Monitoring viral contamination in shellfish growing areas
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Le Guyader, Soizick; Pommepuy, Monique; Atmar, Robert.
Human and animal fecal wastes and urine contain a large number of different viruses that can enter the environment through the discharge of waste materials from infected individuals. Despite the high diversity of viruses that are introduced into the environment by human fecal pollution, only a few have been recognized to cause disease in association with consumption of contaminated shellfish. Viruses are present in shellfish in very low numbers. Nevertheless, they are present in sufficient quantities to pose a health risk as presented. This low level of contamination has made it necessary to develop highly sensitive viral extraction methods to ensure virus recovery from shellfish tissues. The most common route for accidental contamination is after heavy...
Tipo: Text
Palavras-chave: Human enteric viruses; Shellfish; Sewage; Persistence; Flux.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00015/12606/15279.pdf

Contribution à l’étude de l’abondance et la distribution spatiale de certaines espèces de bivalves dans la zone estran de la lagune de Bougrara
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Derbali, Abdelkarim.
Le cardium Cerastoderma glaucum, la fausse clovisse Venerupsis aurea et Loripes lacteus sont des mollusques bivalves très abondants dans toute la zone littorale de la lagune de Bougrara. En vue de valoriser leur exploitation, l’évaluation de la biomasse, la détermination des structures démographiques globales de ces espèces ainsi que la cartographie de leurs abondances ont été entreprises. La méthode générale de l’évaluation des stocks des espèces de coquillage rencontrées dans la lagune se base sur la méthode directe de l’aire balayée. Le principe général de cette méthode repose sur la réalisation, dans un site donné, d’une série d’opérations de prospection et de prélèvement d’échantillons par quadra. D’une manière générale, pour aborder ce type...
Tipo: Theses and Dissertations
Palavras-chave: Shellfish; Geographical distribution; Abundance; Cerastoderma glaucum.
Ano: 2006
URL: http://hdl.handle.net/1834/5482

Distribución del mercurio total en pescados y mariscos del Mar Argentino.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pérez, A.; Moreno, V.J.; Aizpun, J.E.; Malaspina, A.M.
Fish and shellfish samples for total mercury analysis were provided by the local fish export industry. Data collected through the years 1981-83 are processed and information was obtained on actual total mercury values in edible muscle of sampled species. On the basis of these results, future trends in mercury concentration values are hoped to be predicted. The authors suggest a revision of standards in force at present and the proposal of new ones, taking into account species involved and size of specimens.
Tipo: Journal Contribution
Palavras-chave: Heavy metals; Mercury; Pollution monitoring; Fishery products; Marine fish; Shellfish; Heavy metals; Fishery products; Shellfish; Mercury; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_2941; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_4751.
Ano: 1986
URL: http://hdl.handle.net/1834/2033

Evaluation et cartographie des stocks de coquillages dans la partie marine de la région de Zarzis
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ben Abdallah, O.; Ben Hadj Hamida, N.; Jarboui, O.
The experimental survey done, in august 2005, in coastal marine zone (0 - 20 m) of Zarzis showed the existence of numerous species of shellfishes of which Tricolia speciosa, Smaragdia viridis, Nassarius incrassatus, Cerithium vulgatum and Gibbulla umbilicaris are the most important gasteropods and, Pinctada radiate and Donax trunculus the main bivalves. The biomasses estimation, based on the method of swept area, in the studied zone showed that P. radiate is the most abundant species with about 20 000 tones, followed by C. vulgatum (7 645 tones) and T. speciosa (more than 1 000 tones). The Donax trunculus biomass is very low with only 13 tones. Finally, the abundance indexes distribution cartography permitted us to note that it varies from one species to...
Tipo: Journal Contribution
Palavras-chave: Biomass; Cartography; Geographical distribution; Marine crustaceans; Shellfish; Stock assessment; Biomass; Geographical distribution; Shellfish; Stock assessment; Cartography; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_1344.
Ano: 2006
URL: http://hdl.handle.net/1834/4272

Efecto del Flujo y el Seston sobre la Fisiología Energética del Callo de Hacha Atrina Maura (Sowerby 1835) y del Mejillón de Laguna Mytella Strigata (Hanley 1843)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Galíndez, D.K.
Se examinó el efecto del flujo y seston sobre el callo de hacha Atrina maura y el mejillón de laguna Mytella strigata, bajo diferentes rangos de flujo y de exposición al flujo. En el primer experimento se usaron tres flujos (3.1, 7.3 y 12.1 cm/s) y en un tanque de circuito abierto durante 25 días, con agua proveniente de un estanque de cultivo de camarón y alta concentración de seston. Los mayores incrementos de las dimensiones de la concha, masas de tejidos e índice de condición de A. maura se obtuvieron a 7.3 y 12.1 cm/s, mientras que en M. strigata fueron a 3.1 cm/s. Los máximos contenidos de lípidos y acilgliceroles de A. maura en los tejidos se obtuvieron a los mayores flujos, mientras que en M. strigata, los máximos contenidos de lípidos y...
Tipo: Theses and Dissertations
Palavras-chave: Physiology; Shellfish; Animal growth; Feeding experiments; Shellfish; Physiology; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_49881.
Ano: 2010
URL: http://hdl.handle.net/1834/3658

Les ressources vivantes exploitables du lac de Bizerte : Etat actuel et potentialités  ( première partie)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Beji, O.
La production conchylicole du lac de Bizerte reste très faible (une moyenne de 120 t /an) comparée à son potentiel qui a été estimé selon les auteurs et la surface exploitée entre 10000 et 20000(t)/an. Un programme de développement d'entreprises conchylicoles de type familiales, PME et autres est à priori largement justifiable dans le lac de Bizerte et la mer ouverte avoisinante (zone de cap Zebib).La  production annuelle moyenne de la pêche est de 86,7 t/an avec une productivité totale de 12,4 kg/ha/an. L’aménagement de la pêcherie, l’introduction d’une aquaculture extensive et  l’ensemencement régulier du plan d’eau sont des solutions intéressantes pour améliorer les ressources du lac. La collecte naturelle des algues rouges de type gracilaire n’offre...
Tipo: Journal Contribution
Palavras-chave: Potential resources; Aquaculture development; Shellfish; Exploitation.
Ano: 2000
URL: http://hdl.handle.net/1834/4294

Perturbations observées chez la palourde "Ruditapes decussatus" et la datte de mer "Lithophaga lithophaga" collect"es au nord de la Tunisie
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Jaafar Kefi, F.; Trigui El Menif, N.; Le Pennec, M.
La présente étude a porté sur une anomalie morphologique observée chez la palourde européenne Ruditapes decussatus collectée dans le lac nord de Tunis et des perturbations coquillières relevées chez la datte de mer Lithophaga lithophaga prélevée dans la baie de Bizerte. L’examen de la partie molle et de la coquille de ces deux espèces de bivalves a révélé une malformation chez la palourde européenne  qui consiste en la différenciation de deux siphons inhalant et exhalant surnuméraires prenant naissance des deux siphons habituels, complètement séparés, inhalant et exhalant. Les siphons en forme de Y  possèdent ainsi  4 ouvertures fonctionnelles au lieu de 2.  Chez la datte de mer Lithophaga lithophaga, nous avons relevé la présence de perturbations...
Tipo: Journal Contribution
Palavras-chave: Abnormalities; Animal morphology; Ecology; Shellfish; Shells; Lithophaga lithophaga; Ruditapes decussatus; Http://aims.fao.org/aos/agrovoc/c_48059; Http://aims.fao.org/aos/agrovoc/c_48150.
Ano: 2006
URL: http://hdl.handle.net/1834/4263

Amnesic Shellfish Poisoning (ASP)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ravn, H.
In this manual a review is provided of the chemical and toxicological aspects of Amnesic Shellfish Poisoning (ASP). The document contains information on chemical structure, chemical data, where to obtain standards and reference materials, the origin and occurrence, chemical analysis, mouse bioassay, epidemiology, mechanisms of action, symptoms and therapeutics. The practical use of this document has been highlighted in agreement with the Members of the Task Team on Aquatic Biotoxins. This document is prepared by Dr. H. Ravn, IOC together with Prof. T. Yasumoto, Tohoku University, Japan, Chairman of the Task Team on Aquatic Biotoxins. Dr. J. Ramsdell, National Oceanic and Atmospheric Administration (NOAA), Charleston Laboratory, USA has supplied parts of...
Tipo: Report
Palavras-chave: Fish intoxication; Poisonous organisms; Fish diseases; Shellfish; Epidemiology; Chemical analysis; Shellfish; Fish diseases; Epidemiology.
Ano: 1995
URL: http://hdl.handle.net/1834/2799

Biologie, abondance et cartographie de deux espèces de bivalves : l’huitre perlière &lt;Pinctada radiata&gt; et la coque glauque &lt;Cerastoderma glaucum&gt; dans le golfe de Gabes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Derbali, Abdelkarim.
The pearl oyster Pinctada radiata and the cockle Cerastoderma glaucum are among the most abundant bivalve molluscs in southern Tunisian waters. These species are not currently subject to any investigation despite their important economic value in the world. For this reason, their biological parameters, their spatial distribution and their stock assessment were undertaken in the Gulf of Gabes. The reproductive cycle was studied in relation to variations of the environment parameters. The specimens were collected monthly during one year (2007) in sites of El Kraten and El Jorf (Kerkennah Islands) for the first species and sites of Sidi Mansour and El Hicha (North of Sfax and Gabes) for the second. An intraspecific polymorphism biometric trait for P. radiata...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Biology; Shellfish.
Ano: 2011
URL: http://hdl.handle.net/1834/5404

Amnesic Shellfish Poisoning (ASP)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ravn, H.
In this manual a review is provided of the chemical and toxicological aspects of Amnesic Shellfish Poisoning (ASP). The document contains information on chemical structure, chemical data, where to obtain standards and reference materials, the origin and occurrence, chemical analysis, mouse bioassay, epidemiology, mechanisms of action, symptoms and therapeutics. The practical use of this document has been highlighted in agreement with the Members of the Task Team on Aquatic Biotoxins. This document is prepared by Dr. H. Ravn, IOC together with Prof. T. Yasumoto, Tohoku University, Japan, Chairman of the Task Team on Aquatic Biotoxins. Dr. J. Ramsdell, National Oceanic and Atmospheric Administration (NOAA), Charleston Laboratory, USA has supplied parts of...
Tipo: Book
Palavras-chave: Fish intoxication; Poisonous organisms; Fish diseases; Shellfish; Epidemiology; Chemical analysis; Shellfish; Fish diseases; Epidemiology; Http://aims.fao.org/aos/agrovoc/c_7033; Http://aims.fao.org/aos/agrovoc/c_2920; Http://aims.fao.org/aos/agrovoc/c_2615.
Ano: 1995
URL: http://hdl.handle.net/1834/2799

The Implicit Prices of Finfish and Shellfish Attributes and Retail Promotion Strategies: Hedonic Analysis of Weekly Scanner Data in the U.S.
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Gold,   Glen; Sherry,   Larkin.
Using AC Neilson retail scanner data on U.S. frozen finfish and shellfish sales from 2007-2010, hedonic models of each market estimated price discounts following the Deepwater Horizon oil spill and as a result of promotional activities, and premiums and discounts for select products labeled “wild” and “imported”, respectively.
Tipo: Presentation
Palavras-chave: Hedonic Analysis; Scanner Data; Finfish; Shellfish; Fisheries; Implicit Prices; Product Attributes; Promotion; Labeling; Deepwater Horizon Oil Spill; Demand and Price Analysis.
Ano: 2012
URL: http://purl.umn.edu/119806

DEMAND INTERACTION BETWEEN FARMED SALMON AND WILD CAUGHT FISH IN THE UNITED KINGDOM
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Fofana,   Abdulai; Clayton,   Patty.
Demand relationships between salmon and a number of wild-caught whitefish and shellfish species using both single equation models and linearised AIDS system framework. The system is well represented although autocorrelation were found in both approaches but this is less of a problem in the systems approach. A cautious interpretation of the results indicated that salmon had a long-run market relationship with the whitefish species of cod, monkfish, saithe, whiting and plaice and with the shellfish species of mussels, nephrops, scallops and shrimp. These groups contain the main seafood species consumed within the United Kingdom, and therefore should include most potential substitutes for salmon.
Tipo: Working or Discussion Paper
Palavras-chave: Demand; Salmon; Whitefish; Shellfish; AIDS; Elasticities; Demand and Price Analysis; Resource /Energy Economics and Policy; C32; C22; D12.
Ano: 2003
URL: http://purl.umn.edu/11828

Chapter 05: CONTINGENT VALUATION OF HEALTH RISK REDUCTIONS FOR SHELLFISH
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Lin,   Chung-Tung Jordan; Milon,   J. Walter.
This book was originally published by Westview Press, Boulder CO, 1995.
Tipo: Book Chapter
Palavras-chave: Health risk; Shellfish; Contingent valuation; Willingness to pay; Food Consumption/Nutrition/Food Safety.
Ano: 1995
URL: http://purl.umn.edu/25971