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| Registros recuperados: 64 | |
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| Renault, Tristan; Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Guilpain, Patrice; Geairon, Philippe; Razet, Daniel; Seugnet, Jean-luc; Gagnaire, Beatrice; Kerdudou, Nolwenn. |
| Massive abnormal mortalities of flat oysters Crassostrea during the summer period are nothing new, and such episodes have been described in scientific literature for about forty years. Numerous studies demonstrate that there is not one single identified cause to this phenomenon and that it is, on the contrary, a combination of different parameters. This program proposes a multidisciplinary approach to the problem of summer mortality of C. gigas in which the working hypothesis is that these mortalities result from the interaction of three parameters: environment, host and pathogens. As a consequence, this program gathers all the necessary competences for the study of these interactions: competences in genetics, physiology, immunology, ecotoxicology,... |
| Tipo: Text |
Palavras-chave: Marennes Oléron; Activité hémoctyaire; Synergie écologie côtière; Pathologie; Paramètres hémocytaires; Physiologie; Paramètres; Reproduction; Mortalités; Crassostrea gigas; Huîtres. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/2002/acte-3404.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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| Devauchelle, Nicole; Barret, Jean; Salaun, Gilles. |
| This report compiles 17 short and illustrated syntheses concerning the natural strategies of reproduction and the artificial control of the reproductive process for the flat oyster, Ostrea edulis, the japanese oyster, Crassostrea gigas, the mussels, Mytilus edulis and My ti/us galloprovincialis, the scallop, Pecten maximus. An additional syntheses is presented, as a comparison within molluscs, which are the main research topics at IFREMER concerning the artificial control of the reproductive processes in Marine Fish. Three main subjects are documented : 1. the ecophysiology of the natural period of reproduction in the wild, 2. the methods developed in the hatcheries for the artificial control of the reproductive periods, the gametes collection and the... |
| Tipo: Text |
Palavras-chave: Bivalves; Stratégie de reproduction; Contrôle artificiel; Gonades; Gamètes; Coquille St Jacques; Moules; Huîtres; Nourriture; Photopériode; Température; Biologie; Physiologie; Biochimie.; Bivalves; Reproductive strategy; Artificial induction of reproduction; Gonads; Gametes; Scallop; Mussels; Oysters; Food; Light; Temperature; Biology; Physiology; Biochemistry.. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00043/15441/12811.pdf |
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| Soletchnik, Patrick; Ropert, Michel; Grangere, Karine; Munaron, Dominique; Struski, C.. |
| The role of freshwater is more difficult to comprehend. It might act as a detrital organic matter "vector" (during floods) or an anthropic waste "vector" (toxic molecules from agriculture or other industries; nutritive salts from leaching...). Its effect has been demonstrated in the Bay of Veys (Ropert and Kopp, 2000; Misko, 2003), and especially its intense but transient action, presenting high freshenings, as recorded by high-frequency multiparameter probes since 1996 [15]. On this oyster culture site, mortality could then result from osmotic shocks. The "mortality-flow" relationship, demonstrated in 2003 in the Bay of Veys (Misko 2003), has to be specified. It is found in a more sustained way in the Marennes Oléron Bay (R2 = 0.40). This result also... |
| Tipo: Text |
Palavras-chave: MOREST; Impact; Physiologie; Pluviométrie; Apport eau douce; Mortalités; Crassostrea gigas; Huîtres. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3409.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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| Ropert, Michel; Lefebvre, Sebastien; Soletchnik, Patrick; Blin, J. L.; Faury, Nicole; Struski, Caroline. |
| The "trophic risk" has been demonstrated in the bioenergetic model developed in vivo and based on various diet conditions similar to those of different types of oyster culture basins (eutrophic, heterotrophic and oligotrophic) [22, 23]. The trophic resource mortality relationship differs from one basin to another, according to the quantity of this resource. Multy-varied analysis (ACP) conducted on a total of 11 oyster culture sites and handled in a database matching mortality and environmental data, show that the trophic indicator "chlorophyll a" (often coupled with temperature) is involved in a positive correlation with the mortality of both age classes (1 and 2 years old). The stock transfer from the Bay of Veys to the west coast of Cotentin in spring... |
| Tipo: Text |
Palavras-chave: MOREST; Crassostrea gigas; Physiologie; Phéopigments; Ressources trophiques; Modèle bioénergétique; Mortalités; Huîtres. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3410.pdf |
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| Soletchnik, Patrick; Heral, Maurice; Razet, Daniel; Geairon, Philippe. |
| Dans le cadre des études de physiologie, la fonction de filtration intervient dans le calcul du bilan énergétique, ou permet de déterminer la quantité d'aliment consommé par les mollusques filtreurs. Cette fonction peut également être considérée dans les relations avec le poids de l'animal, la température et un certain nombre d'indices de qualité et de quantité de l'aliment dont se nourrit le bivalve. Dans un contexte de coopération internationale entre scientifiques anglais, espagnols et français, une expérimentation physiologique sur les mollusques a été réalisée en septembre 1991 à l'IFREMER La Tremblade. De nombreux objectifs motivent cette expérimentation : la comparaison inter espèces, la confrontation des techniques mises en oeuvre par les... |
| Tipo: Text |
Palavras-chave: Physiologie; Filtration; Huître creuse; Crassostrea gigas; Alimentation. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00102/21303/18916.pdf |
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| Trochon, Pierre. |
| L'huître appartient à l'embranchement des mollusques, classe des pélécypodes ou lamellibranches, ordre de monomyaires, famille des ostréidés. Les multiples espèces, vivant actuellement dans le monde, il y en a une centaine environ, différent en particulier par la forme variable de leur coquille et par quelques détails de leur organisation interne. Les récentes études des coquilles larvaires, présentant dans leur charnière crénelée des différences remarquables, on permis de déterminer trois genres dans la famille des ostréidés : le genre Ostrea, le genre Gryphaea et le genre Pycnodonta. Sur les côtes françaises, deux espèces sont rencontrées et font l'objet de culture. Ce sont : Ostrea edulis, l'huître plate, et Gryphaea angulata, l'huître portugaise. Le... |
| Tipo: Text |
Palavras-chave: Huîtres; Ostréiculture; Classification zoologique; Anatomie; Gryphaea angulata; Répartition géographique; France; Physiologie. |
| Ano: 1960 |
URL: http://archimer.ifremer.fr/doc/00002/11320/7845.pdf |
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| Lachambre, Sébastien. |
| In the context of an increasing demand and a declining supply from fisheries, worldwide aquaculture production of abalone has greatly increased in the last decades. Selective breeding has been initiated to improve growth in major abalone species. In France, the abalone production was initiated 30 years ago and struggles to develop. This CIFRE PhD co-financed by France Haliotis, the only French hatchery in activity, was initiated to study early domestication process of farmed abalone population and to provide knowledge required to design a selective breeding program adapted to this company. Wild and farmed populations were compared, showing that, until 2013, farmed and wild abalone presented similar performances. However, lower physiological and behavioural... |
| Tipo: Text |
Palavras-chave: Sélection génétique; Ormeaux; Croissance; Physiologie; Comportement; Selective Breeding; Abalone; Growth; Physiology; Behaviour. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00441/55231/56711.pdf |
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| Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Robert, Stephane; Goulletquer, Philippe. |
| The cupped oyster, Crassostrea gigas was first introduced in France in 1967 [13]. On the Atlantic coast, the Marennes Oléron Bay (Figure 1) is the first European oyster culture basin with a cupped oyster (Crassostrea gigas) stock of 110,000 tons and an annual output of 30,000 to 40,000 tons. The Ronce oyster bank, located at the south of the bay (Figure 1), is made of 1,600 concessions spread out over 175 ha. It produces 8,000 to 10,000 tons of cupped oysters each year. In Japan, Crassostrea gigas has been cultivated for more than 1,000 years (Farley, 1992). Since the beginning of the 1960's, oyster mortality has multiplied throughout the world (Imaï et al., 1965; Sinderman, 1976; Mackin, 1961; Beattie et al, 1980). In the 60's and 70's, Japan and the west... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Physiologie; Pontes; Maturation; Croissance; Marennes Oléron; Huîtres; Mortalités. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/rapport-3380.pdf |
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| Pepin, Jean-francois; Benabdelmouna, Abdellah; Degremont, Lionel; Guesdon, Stephane; Le Moine, Olivier; Morga, Benjamin; Bierne, Nicolas; Travers, Marie-agnes; Robert, Stephane; Soletchnik, Patrick. |
| Depuis 2014, des épisodes de mortalité anormale affectent les cheptels mytilicoles tant adultes que juvéniles. Dès l’année 2015, une première année d’étude a été réalisée au travers de l’action MORBLEU (Mortalité des moules Bleues). Elle a été menée dans les Pertuis charentais et la baie de Bourgneuf. Dans ce même contexte, elle a été reconduite en 2016 afin de poursuivre l’analyse des données collectées en 2015, renouveler une campagne d’étude et d’observation in situ, formuler des hypothèses autour de facteurs favorisants ces épisodes de mortalité de moules, développer des essais permettant de tester ces hypothèses dans le futur et produire des lots de moules pour ces essais et pour caractériser le potentiel adaptatif des animaux face aux épisodes de... |
| Tipo: Text |
Palavras-chave: Moules; Mytilus edulis; Facteurs environnementaux; Mortalité; Equilibre microbien; Populations; Qualité cytogénétique; Anomalies hémocytaires; Expression de gènes; Physiologie. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00391/50288/50978.pdf |
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| Registros recuperados: 64 | |
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