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| Registros recuperados: 64 | |
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| Dao, Jean-claude; Gerard, Andre; Buestel, Dominique. |
| Research on the black scallop followed that on the king scallop. Indeed, over the 1973-1975 " spadework » period, it has been demonstrated that the roadsted of Brest was: - an overexploited king scallop deposit; the broodstock not being able to ensure a satisfying renewal of the species. - a black scallop production deposit (hundreds of tonnes). In parallel, the collection trials provided null results for the king scallop but very interesting results for the black scallop (thousands of spats per collector). From 1976 onwards, the spat collecting operations did not focus on king scallop juveniles anymore, but on black scallop. |
| Tipo: Text |
Palavras-chave: Reproduction; Captage; Physiologie; Pétoncle; Chlamys varia. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/acte-6538.pdf |
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| Bodoy, Alain; Garnier, Jacqueline; Geairon, Philippe; Chagot, Dominique; Grizel, Henri; Comps, Michel; Razet, Daniel. |
| Depuis le mois de juin 1988, les ostréiculteurs ont fait part de la présence de mortalités importantes sur le banc de Ronce (bassin de Marennes-Oléron), d'abord auprès de l'Ifremer et des Affaires Maritimes, puis des pouvoirs publics. Ces problèmes ont été évoqués lors d'une réunion en Préfecture de Charente-Maritime, le 4 juillet 1988. Il s'est alors avéré nécessaire de réaliser un constat de la situation notamment sur le banc de Ronce, et de faire le point sur les causes pouvant être à l'origine de la situation sur les mortalités survenues dans cette zone. Cette décision a été confirmée le 12 juillet, lors d'une réunion à la Sous-Préfecture de Rochefort. Le présent rapport présente les résultats scientifiques actuellement disponibles, ainsi que les... |
| Tipo: Text |
Palavras-chave: Mortalité; Météorolgie; Paramètres hydrologiques; Physiologie; Croissance; Bivalvia; Crassostrea gigas; Bassin de Marennes Oléron. |
| Ano: 1988 |
URL: http://archimer.ifremer.fr/doc/00086/19765/17406.pdf |
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| Goulletquer, Philippe; Lagarde, Franck. |
| Le bassin de Marennes-Oléron est le premier site ostréicole européen. Depuis 1988 des mortalités chroniques apparaissent sur les élevages conchylicoles. En 1996, un programme de suivi de mortalité et des paramètres environnementaux a été développé. Les différentes conclusions retenues au cours des années antérieures font état de brusques variations de température suspectées dans l'apparition de ces mortalités. Une approche écophysiologique des huîtres par l'intermédiaire de la mesure de respiration a permis de déterminer l'effet significatif d'un stress thermique (∆T=28°C). La maturité sexuelle apparaît également comme un facteur prépondérant dans la demande métabolique. A l'issue de cette étude, il apparaît que les huîtres matures et de surcroît stressées... |
| Tipo: Text |
Palavras-chave: Ecophysiologie; Physiologie; Huître creuse; Bassin de Marennes-Oléron. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00076/18761/16332.pdf |
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| Bigot, L.; Dubos, M. P.; Dheilly, N.; Favrel, P.; Kellner, K.; Lelong, C.; Martinez, A. S.; Riviere, G.; Santerre, C.; Sourdaine, P.; Degremont, Lionel; Flahauw, Emilie; Hatt, Philippe-jacques; Heurtebise, Serge; Lapegue, Sylvie; Azzouzi, N.; Galibert, F.; Boudry, Pierre; Corporeau, Charlotte; Fabioux, Caroline; Guevelou, Eric; Huvet, Arnaud; Sussarellu, Rossana. |
| Le projet GAMETOGENES vise à améliorer les connaissances des bases physiologiques et génétiques de la reproduction et des métabolismes associés chez un mollusque d'importance économique l'huître creuse, Crassostrea gigas. Il a pour objectifs (1) la définition de marqueurs clés de la gamétogenèse, de l'investissement reproducteur et du déterminisme du sexe chez une espèce hermaphrodite à protandrie irrégulière (2) la recherche de QTL de survie aux mortalités estivales ou à l'effort de reproduction dont le succès repose sur l'augmentation de la densité de marqueurs sur les cartes génétiques existantes (SNP en particulier) et sur les liens qui pourront être établis entre ces cartes de liaison et une carte physique (3) le développement d'outils pour valider la... |
| Tipo: Text |
Palavras-chave: Génétique; Huître creuse; Crassostrea gigas; Gamétogenèse; QTL; Marqueur; Physiologie. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00107/21781/19355.pdf |
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| Auger, Christian; Grizel, Henri; Tige, Gilbert; Langlade, Aime; Rabouin, Marie-agnès. |
| Breeding Crassostrea gigas was conducted in three rivers of Morbihan (Brittany France). During one year, every four months, their increasement was examined. In one of these rivers, oysters showed, however their age and their origin, an abnormal increasement. Shells were very thick, with many chambers. At the opposite, in the two others rivers, oysters did not show that disordered state. Shells were sound and their linear increasement was harmonious |
| Tipo: Text |
Palavras-chave: Coquilles; Physiologie; Crassostrea gigas; Huîtres. |
| Ano: 1977 |
URL: http://archimer.ifremer.fr/doc/1977/acte-6245.PDF |
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| Ropert, Michel; Rauflet, Fabienne; Soletchnik, Patrick; Geairon, Philippe; Bedier, Edouard; Bouget, Jean-francois. |
| Temperature affects undoubtedly the 3 working sites where, systematically, the observation of the first abnormal mortalities coincides with a water temperature of around 19°C. The nature of the processes implied could have a "cumulative" effect, affecting the physiology (this phenomenon has been observed with other marine species) or a "threshold" effect, acting only as a trigger. The question has not been answered yet. The kinetics of the thermic evolution around the mortality period has to be studied in depth in order to understand if this temperature acts more as an "associated factor", during a chronic stress period, or during an acute stress, as suggested by the "on-bottom/off bottom" mortality model of the Marennes Oléron Bay [12]. |
| Tipo: Text |
Palavras-chave: MOREST; Mortalité; Stress; Température; Risque thermique; Physiologie; Crassostrea gigas; Huîtres. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3408.pdf |
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| Fleury, Elodie; Petton, Sebastien; Corporeau, Charlotte; Gangnery, Aline; Pouvreau, Stephane. |
| Occupying a prime position in the French coastal landscape, oyster farming is the leading contributor to the French aquaculture sector with an estimated production of 85,000 tonnes in recent years. However, since 2008, this species has been affected by recurrent massive mortality episodes triggered by the presence of viral infectious agents (of the type Herpes virus OsHV-1 μVar) in conjunction with environmental factors (i.e. temperature rise). This viral infection induces an alteration of the antimicrobial defenses and a destabilization of its microbiota. This process leads to secondary infection by opportunistic bacteria that are potentially pathogenic and multiply rapidly, causing irreversible tissue damage leading to the death of the animal. At the... |
| Tipo: Text |
Palavras-chave: Huître creuse; Physiologie; Génétique; Écologie; Réseau National. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00634/74654/74826.pdf |
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| Troussellier, Marc; Bonnefont, Jean-luc; Courties, Claude; Derrien, Annick; Dupray, Elizabeth; Gauthier, Michel; Gourmelon, Michele; Joux, Fabien; Lebaron, Philippe; Martin, Yvan; Pommepuy, Monique. |
| The effects of different environmental factors (nutrient deprivation, hyperosmotic shock, exposure to light) on enteric bacteria which have been transferred into the marine environment, have been studied experimentally (microcosms) by considering demographic, physiological and genetic responses in Escherichia coli or Salmonella typhimurium populations. Short-term experiments (less than or equal to 48 h) showed that nutrient deprivation induced limited changes in measured bacteriological variables, but when combined with hyperosmotic shock, it results in an energy charge decrease and inactivation of membrane transport. Light exposure mainly affects the colony-forming capacity of bacterial populations. Combining different stress factors confirmed the rapid... |
| Tipo: Text |
Palavras-chave: Genetics; Cellular states; Physiology; Seawater; Enteric bacteria; Génétique; Etats cellulaires; Physiologie; Eau de mer; Entérobactéries. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/publication-845.pdf |
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| Degremont, Lionel; Soletchnik, Patrick; Doner, Anne. |
| 2001 shows how important the "R" and "S" biological families are for experimentation as well as the need to "preserve" these families from mortality during the first year. The "experimental nursing" conditions do not allow the conservation of dozens of families with many members for 6 to 8 months. Precocious characterisation at around 4-5 months enables a first selection of the biological material, as well as a first answer to the "in lab" genetical selection of the families. After the first results in 2001 (Céline de Ambroggi, LCPC, L. Degremont), two "precocious characterisation of mortality" experiments are carried out in 2002 on the divergent lineage of some genetical families (LGP production). Two 15 day long experiments are conducted in la Tremblade... |
| Tipo: Text |
Palavras-chave: Mortalités; Sélection; Physiologie; Genetique; Crassostrea gigas; Huîtres. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/acte-3406.pdf |
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| Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Guilpain, Patrice; Geairon, Philippe; Razet, Daniel; Seugnet, Jean-luc; Robert, Stephane; Ropert, Michel; Simonne, Charlotte; Hugonnet, Virginie; Moal, Jeanne; Pouvreau, Stephane; Huvet, Arnaud; Samain, Jean-francois; Lambert, Christophe; Soudant, Philippe; Frouel, Stephane; Choquet, Gwenaelle; Delaporte, Maryse; Paillard, Christine. |
| Four laboratories are involved in this multidisciplinary study: the Conchological Laboratory of Normandie (LCN), the Invertebrates Physiology Laboratory (LPI), the Université Bretagne Occidentale (LEMAR IHP) and the Conchological Laboratory of Poitou-Charentes (LCPC). The part of the study which is presented here (thematics "Coastal ecology") was produced in collaboration with the LCN. The data on the Bay of Veys was collected by Michel Ropert. This study aims at observing the "sites" effect on mortality and on the general biology of the animal, as well as measuring some environmental elements (e.g. water temperature, etc.). The geographical sites are Gefosse in the Bay of Veys (East Cotentin) and the Ronce bank in the south of the Marennes Oléron Bay. The... |
| Tipo: Text |
Palavras-chave: Immunologie; Physiologie; Paramètres environnementaux; Croissance; Ecologie côtière; Baies des Veys Cotentin; Ronce Charente Maritime; Comparaison sites; Reproduction; Mortalités; Crassostrea gigas; Huîtres. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/acte-3405.pdf |
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| Degremont, Lionel; Boudry, Pierre; Bedier, Edouard; Ropert, Michel; Soletchnik, Patrick; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois. |
| In the scope of the Morest program, 3 series of bi-parental families of cupped oyster consisting of full and half-sib have been created in 2001, and then studied on a regular basis on several sites over the summer period. In October, major survival differences had been demonstrated between the 3 families. The average survival rate for the half-sib families monitored on the three sites varies from 17 to 97 %. Some of them showed high mortality for the three sites, indicating a strong genetic basis (h2 = 0.81 - 0.29) to the variations observed regarding survival. To a lesser extent, growth differences between the studied half-sib families indicate a weaker heritability for this character. .... |
| Tipo: Text |
Palavras-chave: Physiologie; Génétique; Naissain; Sélection; Croissance; Survie; Huîtres; Crassostrea gigas. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-3490.pdf |
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| Registros recuperados: 64 | |
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