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| Registros recuperados: 94 | |
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| Grizel, Henri. |
| The notions of pathology and epidemiology in marine aquaculture are relatively new, especially as far as molluscs are concerned, as they've only been used for about thirty years. Although numerous studies have been conducted, and the concepts in these specific fields have evolved, only very few actions are proposed to stop the spreading of a disease. Only a few main mollusc species are cultivated throughout the world and most of them suffered or suffer from epizooties. Today, their pathological history is more solid: several infectious diseases are now known, numerous pathogens or potential pathogens have been described, diverse mortalities have been studied and several types of tumours have been observed. We now live in some cases, as for the flat oyster... |
| Tipo: Text |
Palavras-chave: Aquaculture marine; Pathologie; Conchyliculture; Bivalves; Epidémiologie. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-6580.pdf |
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| Le Gall, G; Mialhe, Eric; Chagot, D; Grizel, Henri. |
| Rickettsia-like microorganisms were described in gill endothelial cells during mass mortalities of Saint-Jacques scallops Pecten maximus in Saint-Brieuc Bay (North Brittany, France) during winter 1985-86. In order to evaluate the epizootiological significance of rickettsiosis of scallops, an analytical and descriptive epizootiological study was undertaken. The study included the geographic distribution, incidence and severity of the disease for several northern European and French scallop populations. Since the center of French scallop production is in Saint-Brieuc Bay, epizootiological investigations were concentrated in this area. Dissemination appeared to be by horizontal transmission. The pathogenic significance of the rickettsia-like organism in... |
| Tipo: Text |
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| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/publication-2758.pdf |
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| Grizel, Henri. |
| La conchyliculture résulte de l'évolution d'une activité de cueillette vers une activité sédentaire de culture. Cette évolution s'est faite par étapes dont les principales sont la gestion des gisements naturels, l'affinage des produits issus de ces gisements et la maîtrise du captage et de l'élevage des juvéniles et adultes. Ces différentes étapes sont d'ailleurs encore observables dans plusieurs pays. Cette évolution a été généralement suscitée par l'amélioration du gain et à conduit les éleveurs à accroître le nombre d'animaux élevés sur une superficie déterminée. En contre partie le passage d'une exploitation extensive à une exploitation intensive à fait surgir à plus ou moins long terme des problèmes peu connus jusqu'alors dans les exploitations du... |
| Tipo: Text |
Palavras-chave: Prophylaxie; Epizootiologie; Epizootie; Pathologie; Conchyliculture. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/acte-4970.PDF |
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| Grizel, Henri. |
| The spread of major diseases of molluscs around the world and the increase of transfers need the development of adapted prophylactic strategies and the increase of research in epidemiology, immunology and genetics. The prophylactic strategies must be based on common laws with the establishment of a list of declarable pathogens, with basic sampling rules (sample size, frequency, definition of geographical areas) and with reglementation of the internal transfers. Moreover, specific adapted diagnosis should be developed to increase the sanitary control performance (e.g. ELISA test, DNA probe, cell culture). In the case of an infectious disease the epidemiology studies should be concerned, the relationship between the culture techniques and the disease, the... |
| Tipo: Text |
Palavras-chave: Bonamia ostreae; Mollusc culture; Aquaculture techniques; Pathology; Immunology; Genetics; Epidemiology; Fish diseases; Disease control. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/1989/acte-1483.pdf |
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| Berthe, Franck; Pichot, Yves; Chollet, Bruno; Thebault, Anne; Kuntz, Gregoire; Tige, Gilbert; Thebault, Anne; Fleury, Pierre-gildas; Hirata, Toshio; Le Coguic, Yvette; Renault, Tristan; Lipart, Cecile; Grizel, Henri; Joly, Jean-pierre; Mazurie, Joseph; Baud, Jean-pierre; Goulletquer, Philippe; Dreno, Jean-paul; Buestel, Dominique. |
| Le réseau de veille zoosanitaire des mollusques, REPAMO, a été créé en 1992 afin de protéger les espèces d'intérêt économique des maladies susceptibles de les affecter. En effet, de même que les autres productions animales, la conchyliculture est frappée par diverses maladies dont certaines se comportent comme des facteurs limitants de la qualité ou de la quantité des productions. L' histoire de l'ostréiculture française a connu de tristes expériences en la matière, notamment dans les années 70 pour l' huître creuse portugaise, Crassostrea angulata ou encore pour l'huître plate, Ostrea edulis. En fait, nous ne disposons que de très peu de possibilités de protéger les mollusques bivalves vis à vis des maladies infectieuses. D' une part, les traitements,... |
| Tipo: Text |
Palavras-chave: Réseau surveillance; Pathologie; Mollusques bivalves; Mortalité. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00098/20901/18521.pdf |
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| Bourjea, Jerome; Frappier, Julie; Quillard, Mireille; Ciccione, Stephane; Roos, David; Hughes, Georges; Grizel, Henri. |
| Situated in the north of the Mozambique Channel, Mayotte is the easternmost island of the Comoros Archipelago. From 1998 to 2005, Grande Saziley beach was monitored daily for green turtle Chelonia mydas nesting activity. Track surveys were monitored daily on 5 other adjacent beaches. Although nesting occurs throughout the year, nesting seasonality begins at the end of the wet season and intensifies during the dry season to reach an average nesting peak in June. In order to estimate the number of females nesting in the Saziley site and population trends over the study period, incubation success and number of nests per female and per season were estimated at 0.77 (±0.05 SD) and 3.03 (±0.37) respectively. With an average of 1545 nesting turtles per year... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00018/12916/9873.pdf |
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| Grizel, Henri. |
| La production d'huîtres creuses françaises est actuellement supérieure à 100 000 tonnes. Elle est assurée par la culture d'une seule espèce, Crassostrea gigas, élevée dans la plupart des centres ostréicoles. Cette espèce s'est avérée résistante aux différentes maladies qui ont affecté tout d'abord l'huître creuse, Crassostrea angulata (Viroses), puis l'huître plate Ostrea edulis (Marteilia refringens et Bonamia ostreae). Ainsi, malgré toutes les controverses que cette implantation a provoquées, le fait essentiel est que depuis 1970-1971, la profession ostréicole a pu rester active, grâce à la culture de C. gigas, et ce, malgré les nombreux problèmes auquels elle a du faire face. |
| Tipo: Text |
Palavras-chave: France; Introduction; Crassostrea gigas; Huître. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/acte-7379.pdf |
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| Cousserans, François; Bonami, Jean-robert; Comps, Michel; Grizel, Henri. |
| Cell cultures, which are the basis of numerous recent studies in medical pathology, have been, for a few years, of great interest in the studies carried out on the diseases affecting invertebrates. However, such cultures, dealing with marine bivalve molluscs, obtained for the first time by Vago and Chastang (1) and progressively improved since then [(2) to (10)], have not been used in pathological studies yet. As the diseases affecting marine molluscs of economic importance such as oysters are both of great interest and facing specific study difficulties, we tried to adapt oyster cell cultures to the study of the presence, development and cycles of the pathogenic or possibly pathogenic microorganisms affecting Crassostrea, and especially the species gigas,... |
| Tipo: Text |
Palavras-chave: Culture cellule; Parasite; Huîtres; Crassostrea gigas. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/1974/publication-5907.PDF |
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| Grizel, Henri. |
| The creation of a mollusc pathology network was in effect and made official during 1992. The subject of this document is to present this network, which has not yet achieved its definitive size. Why this network? The creation of this network responds to several institutional and scientific needs. Indeed, the setting up of control measures aimed at regulating mollusc exchanges notably via European Directive 91/67 and its transcription into French law has, as a corollary, caused the recognition of IFREMER as the agency charged with performing the analyses necessary for responding to the needs of this Directive, as far as marine invertebrates are concerned. Moreover, France being among the primary producers of shellfish in the world, the setting up of a... |
| Tipo: Text |
Palavras-chave: Network; Pathology; Molluscs. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/1996/rapport-1922.pdf |
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| Bachere, Evelyne; Chagot, Dominique; Tige, Gilbert; Grizel, Henri. |
| Considering the epizootics which affect the French stock of flat oysters, Ostrea edulis (Grizel, 1985), trials to introduce an Australian oyster, Ostrea angasi, have been undertaken. The spat produced in a hatchery from breeders imported from Australia were reared in the south ofBrittany and in Normandy (Bougrier et al., 1986). Following mass mortalities (65% of individuals) a haplosporidian was observed in this species. Sporogenesis of the parasite was studied using Iight and electron microscopy. |
| Tipo: Text |
Palavras-chave: Haplosporidian; Parasitology; Pathology; Ostrea angasi; Oysters. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/acte-3112.pdf |
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| Grizel, Henri; Comps, Michel; Raguenes, D; Leborgne, Y; Tige, Gilbert; Martin, A. |
| Following the mass mortality of Ostrea edulis, some experiments were conducted with O. chilensis broodstock and spat coming from Chiloe Island (Chile). Concurrently, spat of th same species produced in a hatchery was cultivated. After a small period of growth, these oysters died during the summer. Microscopic observations showed Marteilia refringens and Bonamia ostreae in the oysters' tissue. For these reasons, Ostrea chilensis has not been retained to temporarily replace O. edulis. |
| Tipo: Text |
Palavras-chave: ANE; France Bonamia ostreae Marteilia refringens Ostrea chilensis Ostrea edulis Bivalvia marine mollusks spat mortality parasites parasitic diseases acclimatization oyster culture. |
| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/1982/publication-1851.pdf |
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| Tige, Gilbert; Grizel, Henri; Comps, Michel. |
| Abnormal mortalities of flat oysters, Ostrea edulis, have been monitored in June 1979 in some farms of l'Ile Tudy. The examination of these oysters with light and electron microscopy showed different forms of an intracellular parasite localized in the connective tissue of the gills and the digestive gland. It is also detectable in the blood vessels and the stomachal epithelium. Numerous parasited oysters showed distinctive branchial damages (perforations, indentations) visible through macroscopic examination. The epidemiological monitoring carried out on the Norman and Breton coast revealed the presence of this parasite in a large number of flat oyster farms. The percentage of parasited oysters is higher in areas where mortalities have been monitored but... |
| Tipo: Text |
Palavras-chave: Epidémiologie; Huître plate; Ostrea edulis; Mortalité. |
| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/1980/acte-4925.PDF |
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| Cochennec, Nathalie; Hervio, Dominique; Panatier, B; Boulo, Viviane; Mialhe, Eric; Rogier, H; Grizel, Henri; Paolucci, F. |
| Currently recognition of molluscan diseases relies heavily upon light microscopic examination of stained histological sections of molluscan tissues Such histopathological methods are time consuming and relatively inefficient In the study of ongoing epizootics Alternatively, more effluent investigative tools are needed to accelerate disease recognition and quantification Such methods are needed to prevent control and eradicate molluscan diseases This paper reports the development of a direct sandwich enzyme-lmmunosorbent assay (ELISA) for the ascetosporan intrahemocytic parasite Bonamiao ostreae of the flat oyster Ostrea edulis. Bonamiasis is a commercially important epizootic disease of oysters A Bonamia-specific monoclonal antibody is employed in the... |
| Tipo: Text |
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| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/publication-2765.pdf |
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| Registros recuperados: 94 | |
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