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| Registros recuperados: 225 | |
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| Suquet, Marc; Gonzalez, Ricardo; Lebrun, Luc; Queau, Isabelle; Mingant, Christian; Robert, Rene. |
| Controlled reproduction of the European flat oyster requires the development of tools adapted to this species, including a practical anaesthesia and gonad sampling protocol to facilitate sex determination and the verification of gametogenesis. Three replicate groups of 10 oysters (mean weight +/- SD: 29.9 +/- 8.5 g) were anaesthetised in 5 L containers using magnesium chloride designed either for laboratory (Flucka (R)) or agricultural (Dead Sea Work (R): DSW) use, at two concentrations (50 or 72 g L-1). No significant differences were observed in the percentages of oysters anaesthetised or subsequent oyster mortality with the different anaesthetics or concentrations, but increasing water temperature from 14.9 to 18.8 degrees C significantly increased the... |
| Tipo: Text |
Palavras-chave: Oyster; Ostrea edulis; Anaesthesia; Magnesium chloride; Gonad sampling. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12907/9876.pdf |
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| Morga, Benjamin; Arzul, Isabelle; Chollet, Bruno; Gagnaire, Beatrice; Renault, Tristan. |
| Bonamiosis is a disease affecting the flat oyster Ostrea edulis and caused by the protozoa parasite Bonamia ostreae, which is affiliated to the haplosporidia order and the cercozoa phylum. This parasite is mainly intracellular, infecting haemocytes, circulating cells playing an important role in the oyster's defence mechanisms. Even though the parasite's cycle has not been completely understood yet, direct infection from infected oysters to healthy oysters is possible. This leads us to think that there is no intermediary host in the cycle. Very little data on the parasite's infection mechanisms or the host's defence mechanisms is available. In order to better comprehend the Bonamia ostreae / host interaction, some flat oyster's haemocytes have been put in... |
| Tipo: Text |
Palavras-chave: Hémocytes; Ostrea edulis; Bonamia ostreae; Parasite; Huîtres. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/acte-3368.pdf |
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| Mialhe, Eric; Boulo, Viviane; Elston, Ralph; Hill, Barry; Hine, Michel; Montes, Jaime; Mont, Jaime; Banning, Paul Van; Grizel, Henri. |
| Murine moncolonal and polyclonal antibodies to antigesn of Bonamia ostreae were assessed for serological comparaison of parasites associated with different geographical originns of flat oyster, Ostrea edulis, and with Tiostrea lutaria. All Bonamia isolates from O. edulis reacted similary with polyclonal and monoclonal antibodies. The parasite associed with Tiostrea lutaria which lacks reactivity with 20 B 2 MAB must be considered as a serologically distinct from of B. ostreae |
| Tipo: Text |
Palavras-chave: Serological comparison; Polyclonal and monoclonal antibodies; Tiostrea lutaria; Ostrea edulis; Bonamia; Comparaison sérologique; Anticorps polyclonaux et monoclonaux; Tiostrea lutaria; Ostrea edulis; Bonamia. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/1988/publication-3101.pdf |
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| Launey, Sophie; Barre, Marc; Gerard, Andre; Naciri, Yamama. |
| Genetic variability at five microsatellite loci was analysed in three hatchery-propagated populations of the flat oyster, Ostrea edulis. These populations were part of a selection programme for resistance to the protozoan parasite Bonamia ostreae and were produced by mass spawns, without control of the genealogy. Evidence for population bottlenecks and inbreeding was sought. A reduction in the number of alleles, mainly due to the loss of rare alleles, was observed in all selected populations, relative to the natural population from which they were derived. Heterozygote excesses were observed in two populations, and were attributed to substructuring of the population into a small number of families. Pedigree reconstruction showed that these two populations... |
| Tipo: Text |
Palavras-chave: Inbreeding; Effective population size; Bonamia ostreae; Ostrea edulis; European flat oyster. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-2703.pdf |
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| Tige, Gilbert; Morel, Marc. |
| Depuis plusieurs années, l'huître plate O. edulis, cultivée en France est atteinte d'une maladie de la glande digestive. Jusqu'à la fin de l'été 1973, les élevages de l'Aber Benoît, de l'Aber Wrach et de la Penzé étaient les seuls qui, en Bretagne, fussent parasités (Grizel et Tigé, 1973). Depuis, la situation a très nettement évolué. A la fin de l'année 1973, l'épizootie a gagné les secteurs ostréicoles de Morlaix et d'une partie de la rade de Brest ; elle s'est étendue d'avril à juin 1974 à la quasi totalité des autres centres d'élevage. Nous rapporterons ici les observations faites depuis 1973. |
| Tipo: Text |
Palavras-chave: Pathologie; Huître plate; Ostrea edulis; Glande digestive; Bretagne. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00015/12628/9516.pdf |
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| Sajus, Marie-celine. |
| Marteilia refringens est un protozoaire parasite de l'huître plate Ostrea edulis, à l'origine de mortalités dramatiques en élevage depuis les années 1970. En zone endémique, le seul moyen de contrôle de la marteiliose, est une gestion du risque de contamination. Dans ce cadre, la connaissance du cycle parasitaire de Marteilia refringens est primordiale. Les travaux réalisés à ce sujet ont permis de poser l'hypothèse d'un cycle hétéroxène. Le parasite a été détecté par PCR puis localisé au sein des tissus par hybridation in situ au sein d'une espèce de copépode Calanoide prélevée dans une claire ostréicole. A ce stade, cette espèces peut être considéré comme un hôte de Marteilia refringens. Notre étude consistait à mettre en évidence la dynamique des... |
| Tipo: Text |
Palavras-chave: Marteilia refringens; Parasitologie; Huître plate; Ostrea edulis; Eau de mer; Zooplancton; Claires ostréicoles. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00032/14351/11635.pdf |
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| Haure, Joel; Penisson, Christian; Bougrier, Serge; Baud, Jean-pierre. |
| La filtration et la consommation d'oxygène d'Ostrea edulis ont été mesurées à différentes températures (10°-30°C) sur des individus de 5 à 120g de poids total (0,1 à 2,7g de poids sec) et hors période de gamétogénèse. Pour chaque température, la relation allométrique entre la réponse physiologique et le poids sec de l'animal (W) a été estimée selon la relation: y=aWb. Un modèle statistique est proposé pour expliquer la filtration ou la consommation d'oxygène (y) en fonction de la température (T) et du poids sec de l'animal (W): y=[a+(b.cT)]. Wd.d est égal à 0,62 pour la filtration et à 0,74 pour la consommation d'oxygène. Les deux fonctions physiologiques augmentent avec l'élévation de la température et atteignent leur maximum à 30°C ( Filtration:... |
| Tipo: Text |
Palavras-chave: Filtration; Consommation oxygène; Poids sec; Température; Ostrea edulis. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00048/15886/13308.pdf |
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| Arzul, Isabelle; Miossec, Laurence; Blanchet, Estelle; Garcia, Celine; Francois, Cyrille; Joly, Jean-pierre. |
| Bonamiosis due to the intrahaemocytic protistan parasite Bonamia ostreae is a European endemic disease affecting flat oysters Ostrea edulis. After its first description in June 1979 in L'Ile Tudy, Brittany, the parasite rapidly spread to all French oyster farming areas and in other European countries through transfers of live molluscs. Bonamiosis and marteiliosis, another protozoan disease appeared in the seventies, drastically reduced the French flat oyster production from 20 000 tonnes in 1970 to less than 2000 tonnes after 1981. In 2001, about 1650 t of flat oysters were marketed in France. The production is restricted to several areas specialised in reproduction, growth and/or marketing, and depends on transfers of animals. Most important production... |
| Tipo: Text |
Palavras-chave: Bonamia ostreae; Parasitology; Pathology; Ostrea edulis; Oyster. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/acte-6381.pdf |
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| Lallias, Delphine; Taris, Nicolas; Boudry, Pierre; Bonhomme, Francois; Lapegue, Sylvie. |
| he European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. Previous studies of allozymes, microsat-ellites and mitochondrial differentiation over the whole range concluded that a significant divergence existed between Mediterranean and Atlantic populations, together with an isolation-by-distance pattern. However, the average mitochondrial haplotypic diversity displayed a high among populations variance, reflecting smaller effective population size in some locations. Additionally, a ten-fold quantitative difference was observed in the same study in Fst between the mitochondrial and the nuclear genomes,... |
| Tipo: Text |
Palavras-chave: Genotypes; Genetic diversity; Breeding success; Allozymes; Population genetics; Parentage analyses; Natural population; Ostrea edulis; Oyster. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/acte-3334.pdf |
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| Registros recuperados: 225 | |
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