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Registros recuperados: 85
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A single bio-energetics growth and reproduction model for the oyster Crassostrea gigas in six Atlantic ecosystems ArchiMer
Alunno-bruscia, Marianne; Bourles, Yves; Maurer, Daniele; Robert, Stephane; Mazurie, Joseph; Gangnery, Aline; Goulletquer, Philippe; Pouvreau, Stephane.
Many studies based on bioenergetics growth models have investigated the effects of environmental factors on oyster (Crassostrea gigas) growth and physiology. However, most of these models are site-specific and cannot be applied to other culture sites without the re-estimation of parameters or re-formulation of some processes. We aimed to develop a generic growth model suitable for application in contrasting environments, with a constant set of parameters. We tested the oyster-DEB model (Bourlès et al. 2009) for the stimulation of C. gigas growth in different cohorts (spats and adults) at major shellfish culture sites in France, in several years: Arcachon (1993–1994); Marennes-Oléron (2007); Quiberon (1999, 2000, 2001); Rade de Brest (2008); Baie du...
Tipo: Text Palavras-chave: DEB theory; Modelling; Bivalves; Crassostrea gigas; Phytoplankton; Temperature effect; Coastal environment..
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00043/15403/12762.pdf
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Lower Carboniferous marine bivalves from the Cantabrian Mountains (Spain) Naturalis
Amler, M.R.W.; Winkler Prins, C.F..
The Lower Carboniferous bivalves of the Vegamián and Genicera formations are described, followed by a brief discussion on palaeoenvironmental and palaeogeographical aspects. The black shales of the Vegamián Fm. (Tournaisian) yield a peculiar association of euchondriid taxa (Euchondria wagneri sp. nov., Eu. cf. losseni, Eu. cf. bilstonensis, and euchondriids under open nomenclature) and Chaenocardia? carbonifera. This association displays Central-European Kulm-type character, but other typical taxa from the German Kulm are missing in this environment, especially the posidoniids, actinopteriids and pterinopectinids. The light coloured sediments of the Genicera (or Alba) Fm. yield bivalves in slightly greater diversity which include rare palaeotaxodonts,...
Tipo: Article / Letter to the editor Palavras-chave: Bivalves; Lower Carboniferous; Vegamián Fm.; Genicera Fm.; Ricacabiello Fm.; Cantabrian Mts; 42.73; 38.22.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/219076
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Monitoring of trace metal contamination in the Souss estuary (South Morocco) using the clams Cerastoderma edule and Scrobicularia plana ArchiMer
Anajjar, E; Chiffoleau, Jean-francois; Bergayou, H; Moukrim, A; Burgeot, Thierry; Cheggour, M.
Concentrations of seven metals (Cd, Cu, Cr, Pb, Ni, Zn, Hg) were monitored monthly during 2 years in two bivalves, Cerastoderma edule and Scrobicularia plana collected from the Souss estuary (South Morocco) before and after the commissioning of a sewage treatment plant in November 2002. According to trace metals, changes in concentrations were observed mainly in S. plana, characterised by a decrease of Cu, Hg and Pb when Cd was clearly increasing. Conversely, no clear changes were observed in C. edule during the same periods. This study suggests the use of S. plana in the monitoring of trace metal contamination of such coastal marine environments.
Tipo: Text Palavras-chave: Monitoring; Waste water; Bivalves; Metals; South estuary.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4515.pdf
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La mytiliculture en Hollande et en Espagne ArchiMer
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
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Herpèsvirus infectant les bivalves marins : détection, génome et transmission ArchiMer
Arzul, Isabelle.
Since 1991, high mortality rates of larvae and juveniles of different bivalve mollusc species associated with herpesvirus infections have been reported in different countries. The aim of this study was to determine if more than one helpesvirus species was responsible for these infections or just one species exhibiting polymorphism. The investigations concentrated on the analysis of the virus genome, studies of virus transmission in different mollusc species and on the potential role of bivalve adults in the occurrence of infections. The analysis of various target sequences within the virus genome present in infected larvae samples demonstrated the presence of polymorphism. More notably a variant of the virus was identified and the variation appears...
Tipo: Text Palavras-chave: Herpèsvirus; Bivalves; Transmission; Polymorphisme; OsHV-1; Diagnostic; Herpesviruses; Bivalvia; Transmission; Polymorphism; OsHV-1; Diagnostic.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00105/21675/19253.pdf
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Infection à virus de type Herpes chez les bivalves : transmission expérimentale et induction de l'infection ArchiMer
Arzul, Isabelle.
Depuis 1991, d'importantes mortalités sont observées chez des lots de larves et de naissain d'huître creuse, Crassostrea gigas, mais également sur des lots de larves d'autres espèces de bivalve telles que, l'huître plate, Ostrea edulis, les palourdes, Ruditapes decussatus et Ruditapes philippinarum. Ces épizooties se produisent plus généralement à fortes températures en écloserie-nurserie et en période estivale dans le milieu naturel. Les techniques de détection utilisées jusqu'alors pour rechercher ces infections virales, histologie et microscopie électronique à transmission, paraissent assez inadaptées, tant du fait de leur sensibilité, du temps qu'elles nécessitent et de leur coût. Aussi, le laboratoire IFREMER de Ronce les Bains (Charente-Maritime) a...
Tipo: Text Palavras-chave: Mollusques; Bivalves; Crassostrea gigas; Huître japonaise; Pathologie; Herpèsvirus; Infection; Expérimentation.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00108/21957/19551.pdf
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Contribution to the understanding of the cycle of the protozoan parasite Marteilia refringens ArchiMer
Arzul, Isabelle; Chollet, Bruno; Boyer, S.; Bonnet, D.; Gaillard, Juliette; Baldi, Yoann; Robert, Maeva; Joly, Jean-pierre; Garcia, Celine; Bouchoucha, Marc.
The paramyxean parasite Marteilia refringens infects several bivalve species including European flat oysters Ostrea edulis and Mediterranean mussels Mytilus galloprovincialis. Sequence polymorphism allowed definition of three parasite types ‘M’, ‘O’ and ‘C’ preferably detected in oysters, mussels and cockles respectively.Transmission of the infection from infected bivalves to copepods Paracartia grani could be experimentally achieved but assays fromcopepods to bivalves failed. In order to contribute to the elucidation of the M. refringens life cycle, the dynamics of the infection was investigated in O. edulis, M. galloprovincialis and zooplankton over one year in Diana lagoon, Corsica (France). Flat oysters appeared non-infected while mussels were infected...
Tipo: Text Palavras-chave: Bivalves; Marteilia refringens; Copepods; Paracartia latisetosa; Zooplankton; Parasite life cycle.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00165/27635/25768.pdf
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Infections à virus de type herpes chez les bivalves : large spectre d'hôte et détection au stade adulte ArchiMer
Arzul, Isabelle; Renault, Tristan.
In 1972, Farley reported the presence of herpes-type viral particles in adult American oysters (Crassostrea virginica) for the first time. Since then, this pathogen has been detected in various marine bivalve species, usually associated with massive mortality events. To date, herpes-type viruses have been detected in the following species: C gigas, Ostrea edulis, O. angasi, Tiostrea chilensis, Ruditapes decussatus, R. philippinarum and most recently, Pecten maximus.
Tipo: Text Palavras-chave: Pathogènes; Bivalves; Herpesvirus; Herpesviridae.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3266.pdf
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Infection dynamics of a V. splendidus strain pathogenic to Mytilus edulis : In vivo and in vitro interactions with hemocytes ArchiMer
Ben Cheikh, Yosra; Travers, Marie-agnes; Le Foll, Frank.
The pathogenic strain V. splendidus 10/068 1T1 has previously been reported for its virulence to the blue mussel and for its capacity to alter immune responses. In this study, we expanded the knowledge on hemocyte-pathogen interactions by using in vitro and in vivo assays. V. splendidus 10/068 1T1 severely inhibited cell adhesion and acidic vacuole formation unlike the innocuous phylogenetically related V. splendidus 12/056 M24T1 which had no effect on these cell functions. Furthermore, the virulent bacteria decreased hemocyte viability (59% of viability after 24 h). Infection dynamics were explored by using a model based on water tank cohabitation with septic mussels infected by GFP-tagged V. splendidus 10/068 1T1. Experimental infections were...
Tipo: Text Palavras-chave: Innate immunity; Bivalves; Vibrio; Infection; Experimental model; Hemocyte.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00400/51136/53772.pdf
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Contrôle de la ponte ovulaire chez l'huître creuse Crassostrea gigas : utilisation du modèle Sepia officinalis pour la caractérisation de peptides régulateurs ArchiMer
Bernay, Benoît.
Despite the fact that the involvement of environmental factors in the physiology of the japanese oyster C. gigas is fully described, regulatory peptides are not known. In this study, we focused on peptidergic control of egg-laying. In order to characterize peptides involved in the regulation of egg-laying in C. gigas, the cuttlefish S. officinalis was used as a model. Firstly, regulatory peptides were investigated in the cuttlefish by peptidomic analysis. This approach led to the identification of eleven new ovarian regulatory peptides. Based on conserved tags, these peptides have been classified into two families: the SepCRPs (Sepia Capsule Releasing Peptides) and the OJPs (Ovarian Jelly Peptides). Released by oocytes into the genital coelom, they are...
Tipo: Text Palavras-chave: Ostréiculture; Ovaire; Spectrométrie de masse; Peptides; Céphalopodes; Bivalves; Mollusques.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/these-2566.pdf
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Que savons-nous des Marteillia? ArchiMer
Berthe, Franck; Haffner, Philippe; Zerabib, Maamar; Rodriguez, David.
Marteilia refringens, a parasitic protist, is partially responsible for the drastic reduction in French production of the European flat oyster (Ostrea edulis) in the 1970s and still constitutes a major obstacle for revitalizing coastal farming of this species.
Tipo: Text Palavras-chave: Bivalves; Ostrea edulis; Protiste; Parasite; Marteilia refringens; Pathologie.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/acte-3247.pdf
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Shelled Molluscs ArchiMer
Berthou, Patrick; Poutiers, Jean-maurice; Goulletquer, Philippe; Dao, Jean-claude.
Shelled molluscs are comprised of bivalves and gastropods. They are settled mainly on the continental shelf as benthic and sedentary animals due to their heavy protective shell. They can stand a wide range of environmental conditions. They are found in the whole trophic chain and are particle feeders, herbivorous, carnivorous, and predators. Exploited mollusc species are numerous. The main groups of gastropods are the whelks, conchs, abalones, tops, and turbans; and those of bivalve species are oysters, mussels, scallops, and clams. They are mainly used for food, but also for ornamental purposes, in shellcraft industries and jewelery. Consumed species are produced by fisheries and aquaculture, the latter representing 75% of the total 11.4 millions metric...
Tipo: Text Palavras-chave: Management; Fishing gears; Biology; Aquaculture; Fisheries; Gastropods; Bivalves.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2001/publication-529.pdf
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Environmental factors contributing to the development of brown muscle disease and perkinsosis in Manila clams (Ruditapes philippinarum) and trematodiasis in cockles (Cerastoderma edule) of Arcachon Bay ArchiMer
Binias, Cindy; Do, Van Tu; Jude-lemeilleur, Florence; Plus, Martin; Froidefond, Jean-marie; De Montaudouin, Xavier.
The aim of the present study was to identify environmental factors that could explain the distribution of different pathologies of commercially exploited intertidal bivalves in an Atlantic lagoon, Arcachon Bay. In particular, the role of the salinity gradient as a driver was explored. The Manila clam Ruditapes philippinarum experienced two severe pathologies, perkinsosis, which is due to a protozoan parasite, and brown muscle disease (BMD), the etiological agent of which remains unknown. Perkinsus olseni infection was very low in a small low-salinity area but, at the scale of the entire lagoon, was more influenced by organic matter content in the sediment and by emersion time. BMD prevalence was also 2.6 times higher in the higher organic content area but...
Tipo: Text Palavras-chave: Arcachon bay; Bivalves; Diseases; Distribution; Parasites.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00200/31083/31922.pdf
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Compte-rendu d'activité 1990 de l'Unité de Recherche Régionale Aquacole (URRA) La Tremblade ArchiMer
Bodoy, Alain.
Rapport d'activité 1990 de l'Unité de Recherche Régionale Aquacole (URRA) La Tremblade
Tipo: Text Palavras-chave: Conchyliculture; Télécaptage; Gestion élevage; Biologie; Physiologie; Bivalves; Rapport activité.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/00072/18284/15854.pdf
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Modelling growth and reproduction of the Pacific oyster Crassostrea gigas: Advances in the oyster-DEB model through application to a coastal pond ArchiMer
Bourles, Yves; Alunno-bruscia, Marianne; Pouvreau, Stephane; Tollu, Guillaume; Leguay, Didier; Arnaud, Christophe; Goulletquer, Philippe; Kooijman, S.
A bio-energetic model, based on the DEB theory exists for the Pacific oyster Crassostrea gigas. Pouvreau et al. [Pouvreau, S., Bourles, Y., Lefebvre, S., Gangnery, A., Alunno-Bruscia, M., 2006. Application of a dynamic energy budget model to the Pacific oyster, C. gigas, reared under various environmental conditions. J. Sea Res. 56, 156–167.] successfully applied this model to oysters reared in three environments with no tide and low turbidity, using chlorophyll a concentration as food quantifier. However, the robustness of the oyster-DEB model needs to be validated in varying environments where different food quantifiers reflect the food available for oysters, as is the case in estuaries and most coastal ecosystems. We therefore tested the oyster-DEB...
Tipo: Text Palavras-chave: Coastal Environment; Temperature effect; Food Quantifiers; Crassostrea gigas; Bivalves; Modelling; DEB theory.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6436.pdf
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Spatial and temporal distribution of mercury and methylmercury in bivalves from the French coastline ArchiMer
Briant, Nicolas; Chouvelon, Tiphaine; Martinez, Laura; Brach-papa, Christophe; Chiffoleau, Jean-francois; Savoye, N.; Sonke, J.; Knoery, Joel.
Marine mercury (Hg) concentrations have been monitored in the French coastline for the last half a century using bivalves. The analyses presented in this study concerned 192 samples of bivalves (mussels: Mytilus edulis and Mytilus galloprovincialis and oysters: Crassostrea gigas and Isognomon alatus) from 77 sampling stations along the French coast and in the French Antilles sea. The goals of this study were to assess MeHg levels in various common bivalves from French coastline, and to identify possible geographic, taxonomic or temporal variations of concentrations. We show that the evolution of methylmercury (MeHg) concentrations covary with total mercury (HgT) concentrations. Moreover, in most of the study sites, HgT concentrations have not decreased...
Tipo: Text Palavras-chave: Mercury; Methylmercury; France; Bivalves; Speciation.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00353/46465/46398.pdf
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Mise au point de méthodes de manipulation embryonnaire de mollusques bivalves. Application en génétique et pathologie infectieuse ArchiMer
Cadoret, Jean-paul.
Après vingt ans de programmes pivilégiant les méthodes d'élevage, les recherches concernant l'aquaculture, évoluent maintenant vers les domaines de la pathologie infectieuse et la génétique. La maîtrise des productions larvaires a en effet favorisé l'étude de la reproduction et de l'embryologie, et permet désormais d'aborder des travaux expérimentaux sur les différents stades embryonnaires. La polyploïdisation d'oeufs de moules ou d'huîtres a d'abord été envisagée par l'application d'un procédé d'électrofusion. Des expérimentations à grande échelle ont permis l'obtention d'embryons triploïdes (55% chez les huîtres et 36% chez les moules) ainsi que tétraploïdes (20% chez les huîtres et 26% chez les moules). La microinjection de spermatozoïdes a permis de...
Tipo: Text Palavras-chave: Mollusques; Bivalves; Polyploïdie; Electrofusion; Microinjection; Fécondation assistée; Rickettsies; Embryoculture; Trasfert de gène; B-galactosidase; Résistance; Pathologie; Génétique.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00440/55127/56585.pdf
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Procédés de traitement de l'eau de mer en conchyliculture pour la sauvegarde et le maintien de la qualité des mollusques bivalves ArchiMer
Castaing, Jean-baptiste.
The aim of this work is the study of seawater filtration process to preserve commercial bivalves and main tain their quality during harmful algal blooms. The originality of this work is based on the study of rustic processes, capable of removing toxic microalgae from seawater. Two filtration processes have been studied, the immersed hollow fibres membranes and a sand filter. The origin and nature of fouling mechanisms have been identified in connection with the selectivity and energy consumption . Suspensions of toxic and nontoxic microalgae were reconstituted and then filtered through 10 kDa, 300 kDa and 0.2 µm membranes and a sand filter (mean grain diameter dg equal to 250-520 µm). Microfiltration membrane 0.2 µm has emerged as the most suitable for the...
Tipo: Text Palavras-chave: Membranes immergées; Microfiltration; Ultrafiltration; Fibres creuses; Filtre à sable; Mécanismes de colmatage; Dinoflagellés toxiques; Conchyliculture; Bivalves; Immersed membranes; Microfiltration; Ultrafiltration; Hollow fibres; Sand filter; Fouling mechanisms; Toxic dinoflagellates; Shellfish farming; Bivalves.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00092/20349/17994.pdf
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Disjoint geographical distribution of intertidal and nearshore benthic invertebrates in the Southern Hemisphere RChHN
CASTILLA,JUAN C; GUIÑEZ,RICARDO.
Biogeographical explanations for the extant and paleo disjoint geographical distribution in the southern hemisphere of five species of nearshore marine benthic invertebrates: Gaimardia trapesina, Ostrea chilensis, Pyura stolonifera taxonomic complex, Aulacomya ater and Concholepas concholepas, showing distinctive reproductive strategies and early life history characteristics are reviewed and analyzed. Through the use of published and new information we contrasted the following hypotheses: a) vicariance-historical process, b) epiplanktonic larval dispersal, c) juvenile/adult dispersal through rafting and d) planned or accidental anthropogenic dispersal mechanisms. The juvenile/adult transoceanic dispersal hypothesis by rafting was the only one impossible to...
Tipo: Journal article Palavras-chave: Paleobiogeography; Vicariance; Larval dispersal; Rafting; Anthropogenic dispersal; Bivalves; Gastropods; Tunicates; Invertebrates; Nearshore; Southern hemisphere.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400004
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Les parasites du groupe "Mikrocell" : Qui est qui? ArchiMer
Cochennec, Nathalie; Le Roux, Frédérique; Berthe, Franck; Thebault, Anne.
Bonamiose, a disease caused by the protozoa Bonamia ostreae, has destroyed the flat oyster Ostrea edulis production, in France but also in Europe and in the United States since 1979. Another species of Bonamia has been monitored in New-Zealand, in Australia and lately in Chile. In Canada and Australia, two other parasites have been described in cupped oyster: Mikrocytos mackini and Mikrocytos roughleyi. All these small size protozoa are grouped under the name "Mikrocell". For most of them, light and electronic microscope descriptions have been realised. Based on those criteria, different taxonomic positions have been proposed. However, these analysis are still questioned today.
Tipo: Text Palavras-chave: Bivalves; Haplosporidia; Parasites; Pathologie.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3270.pdf
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