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| Registros recuperados: 69 | |
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| Bedier, Edouard; Baud, Jean-pierre; Cochennec, Nathalie; Cornette, Florence; Gerard, Andre; Goyard, Emmanuel; Joly, Jean-pierre; Kopp, Joel; Langlade, Aime; Le Coguic, Yvette; Mazurie, Joseph; Nourry, Max. |
| The European flat oyster Ostrea edulis has been considered as the traditional French oyster for a very long time and has now nearly disappeared from our farms, as a consequence of the two successive epizootic of the Marteilia refringens parasite and Bonamia ostreae. The actual quasi monoculture of Crassostrea gigas has made necessary the search for a diversification in oyster culture, including the search for a new start of the indigenous flat oyster culture. The Ifremer has been conducting parallel works since 1985 in order to better understand the biology of the parasite as well as to try and select different lines of flat oyster resistant to Bonamia ostreae. |
| Tipo: Text |
Palavras-chave: Bonamia ostrea; Huître plate; Sélection Génétique; Ostrea edulis. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/acte-3274.pdf |
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| Cochennec-laureau, Nathalie; Baud, Jean-pierre; Pepin, Jean-francois; Benabdelmouna, Abdellah; Soletchnik, Patrick; Lupo, Coralie; Garcia, Celine; Arzul, Isabelle; Boudry, Pierre; Huvet, Arnaud; Pernet, Fabrice; Bachere, Evelyne; Bedier, Edouard; Petton, Bruno; Gaussem, Florian; Stanisiere, Jean-yves; Degremont, Lionel. |
| Depuis 2008, la filière ostréicole française doit faire face à des surmortalités exceptionnelles des naissains d’huîtres creuses, Crassostrea gigas, (huîtres de moins d’un an) comprises entre 60 et 90% dans tous les sites d’élevage. Des cas de mortalité similaires ont été décrits en Irlande, dans les îles anglo-normandes, au Portugal en 2009 et au Royaume-Uni en 2010. Récemment deux épisodes de mortalité, associés à la présence d’un virus OsHV1 μvar (ou un variant très proche) ont été également décrits en Nouvelle Zélande (décembre 2010) et en Australie (janvier 2011) soulignant la vulnérabilité de la filière ostréicole dans le monde. L’objectif de ce document est de faire un point sur les recherches menées depuis l’apparition de ce phénomène et de... |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00033/14423/11719.pdf |
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| Barille-boyer, Anne-laure; Haure, Joel; Baud, Jean-pierre. |
| The oyster growth has been studied for a 10 year period, from 1986 to 1995, in four locations of the bay of Bourgneuf (French Atlantic Coast). The relations between oysters growth and the main molluscs stocks (cultivated oysters and wild mussels) or environmental factors (hydrobiology, currents, climatology) are analysed to understand the functioning of this shellfish ecosystem. As the water renewal time is about two months, primary production is essentially autochtonal. Phytoplankton development is controlled by the nutrients brought by the river Loire. An important part of the microalgac is composed by the microphytobenthos resuspended by west wind. High seston concentrations, measured on the North of the bay (150 mg/1 as an average), have a negative... |
| Tipo: Text |
Palavras-chave: Ecosystème conchylicole; Modèle global de croissance; Baie de Bourgneuf; Crassostrea gigas; Ecosystem; Shellfish culture; Global growth model; Bay of Bourgneuf; Crassostrea gigas. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/1997/rapport-1633.pdf |
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| Sauriau, P; Baud, Jean-pierre. |
| Based on Coulter Counter data, a new method is proposed to study the influence of the polymorphous variability in size as well as in shape of the diatom species Skeletonema costatum on the physiological performances of the Manila clam Ruditapes philippinarum . Three conditions are required in order to convert volumetric data determined with the Coulter Counter into metric data, i.e. (1) stability of the pervalvar diameter of the diatom chains, (2) statistical independence between length and pervalvar diameter of the diatom chains, and (3) negligible level of coincident passages through the aperture orifice. Under these three conditions, the mean length (l) of a S. costatum chain can be related to the mean pervalvar diameter (d) of diatom chains and to the... |
| Tipo: Text |
Palavras-chave: Bivalvia; Skeletonema costatum; Bacillariophyceae; Algae; Physiology; Biopolymorphism; Counters; Size; Size distribution; Feeding; Nutrition. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/acte-1670.pdf |
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| Severin, Patricia; Baud, Jean-pierre; Haure, Joel. |
| Suite à une étude de faisabilité du grossissement intensif en marais de la palourde japonaise (Ruditapes philippinarum) effectuée en 1988 , une expérimentation ayant pour objectif d'optimiser les conditions d'élevage et de réduire les coûts a été réalisée durant la période de mars à novembre 1989 . L'influence de la ration alimentaire , du taux de renouvellement et de la vitesse de circulation de l ' eau de mer enrichie a été testée en circuit fermé. - Le mode de gestion de l ' eau de mer par recyclage partiel est à proscrire pour l ' élevage intensif de la palourde, il génère une hétérogénéité spatiale importante de la croissance sur toute la longueur des claires expérimentales. - Une influence prépondérante de la quantité de nourriture injectée est mise... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00048/15887/13309.pdf |
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| Glemarec, Yves-marie; Haure, Joel; Baud, Jean-pierre. |
| Cette étude a pour objectif de mettre au point un test standardisé de choc thermique applicable sur le naissain d'huître creuse Crassostrea gigas, facile à mettre en oeuvre, rapide et de faible coût. Ce test doit permettre d'envisager à terme un transfert de cette technique à la profession ostréicole. Dans un premier temps, un modèle a été validé afin de prendre en compte le poids moyen, vis à vis du temps d'application du choc thermique en eau douce à 45°C appliqué aux huîtres pour obtenir 50% de mortalité. Il permet de dresser une table de correspondance poids des juvéniles, temps d'application du stress pour une gamme de 10 à 500mg. La méthodologie retenue pour le stress standard peut être résumée ainsi : - Tamisage d'une population de jeunes huîtres en... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Stress; Choc thermique; Mortalité. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00304/41543/40751.pdf |
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| Meleder, Vona; Barille-boyer, Anne-laure; Baud, Jean-pierre; Barille, Laurent; Cognie, Bruno; Rosa, Philippe. |
| The traditional fattening of the oyster Crassostrea gigas in oyster ponds of the French Atlantic Coast is submitted to natural environmental fluctuations. In order to reduce the growth variability of the soft parts of the bivalve, an intensive fattening process was developed, where the conditions of temperature, particulate organic and inorganic matter (POM and PIM) are controlled. This process relies on the production of the diatom Skeletonema costatum, which is then distributed to the oysters at an average concentration of 4–5 mg POM·L–1. An ecophysiological model of the oyster C. gigas, which simulates the evolution of somatic and gonad–reserve compartments, was applied to these conditions in order to analyse the bivalve responses. Experimentation was... |
| Tipo: Text |
Palavras-chave: Modélisation; Affinage; Ecophysiologie; Crassostrea gigas; Skeletonema costatum; Modelling; Oyster fattening; Ecophysiology; Crassostrea gigas; Skeletonema costatum. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00021/13248/10285.pdf |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Bodoy, Alain; Heurtebise, Serge; Garnier, Jacqueline; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Martin, Anne-genevieve; Claude, Serge; Barret, Jean; Devauchelle, Nicole; Joly, Jean-pierre; Goulletquer, Philippe; Coatanea, Denis; Oheix, Jocelyne; Zanette, Yvan; Blachier, Philippe. |
| This fourth part of the polyploidisation program reports the experiments that were conducted in 1992 and that were devoted to : - the acquiring of a new method using an epifluroescent microscope - the development o a new technique for inducing polyploidy - the triploidy induction for the Europena clam Ruditapes decussatus - the settlement of performance controls conducted on diploid and triploid populations of Ostrea edulis - results of performance controls conducted on diploid and triploid populations of Crassostrea gigas and Ruditapes philippinarum |
| Tipo: Text |
Palavras-chave: Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostra gigas; Cytongenetics; Polyploidy; Ruditapes decussatus; Ruditapes philippinarum; Ostrea edulis; Crassostrea gigas; Cytogénétique; Polyploïdie. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/rapport-3859.PDF |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Heurtebise, Serge; Garnier, Jacqueline; Martin, Anne-genevieve; Claude, Serge; Langlade, Aime; Joly, Jean-pierre; Goulletquer, Philippe; Ruelle, Francois; Coatanea, Denis; Oheix, Jocelyne; Vercelli, Catherine; Chabirand, Jean-michel; Maurer, Daniele; Borel, Michel; Cardinal, Mireille; Cornet, Josiane; Le Pennec, Marcel; Le Mercier, A.. |
| This fifth part of the polyploidisation program reports the experiments that were conducted in 1993 and that were devoted to : - monitoring growth performance of Ostrea edulis diploids and triploids in La Trinité sur Mer and Palavas - monitoring growth performance of Crassostrea gigas diploids and triploids in Port en Bessin, Marennes Oleron (2 locations), Arcachon and Palavas - comparative study of gametogenesis for C. gigas diploids and triploids - comparative study of C. gigas diploids and triploids using sensorial analysis At the end of fifth year, it was clear that triploids are advantageous although such a statement must be moderated according to locations. The gametogenesis stydy showed that triploidy is associated with partial to complete... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Ostrea edulis; Cytogenetics; Polyploidy; Crassostra gigas; Ostrea edulis; Cytogénétique; Polyploïdie. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/rapport-3860.PDF |
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| Breton, Gildas; Baud, Jean-pierre; Haure, Joel. |
| Après les études de mise au point de la technique intensive réalisées en 1988 et 1989 sur des bassins expérimentaux de 30 m2, une optimisation de cette méthode d'élevage a été faite sur deux claires de 200 m2 avec les normes zootechniques suivantes: densité = 300 palourdes x m-2, concentration d'eau de mer enrichie en Skeletonema costatum produit à partir d'eau salée souterraine = 300 cellules/µl ou 126 µg/l de chla, taux de renouvellement = 100 % du volume par jour. En 8 mois d'élevage, le poids moyen des palourdes est passé de 5,5 g à 19,3 g, soit un rendement de 4,53 kg/m2 pour une production finale de 1,86 tonne, avec une chair de qualité satisfaisante, riche en glycogène et ayant un indice de condition de 94. Aucune trace d'anneau brun n'a été... |
| Tipo: Text |
Palavras-chave: Aquaculture intensive; Marais maritime; Ruditapes philippinarum; Skeletonema costatum; Eau salée souterraine; Asperseur. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00048/15880/13302.pdf |
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| Catois, Stéphane; Haure, Joel; Martin, J-l.; Nourry, Max; Palvadeau, Hubert; Baud, Jean-pierre. |
| Mortality among juvenile Crassostrea gigas has been occuring during the summer months since 1995 and is now considered to be a real problem for French oyster culture. The aim of this study was to standardise the stress that could be applied to Crassostrea gigas spat. In initial experiments in 1998, the weight of individual spat and the duration of a heat shock at 50°C in freshwater, adapted for oysters of between 500 and 2000 mg, were built into a model to obtain 50% mortality. However, the precision was low (50%) and will need to be improved in the future. Following this, hatchery-produced juveniles weighing 10 to 500 mg were subjected to heat shock at 45°C in heshwater ; the duration of the shock was calculated based on a model built in 1997. The results... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Stress; Choc thermique; Mortalité; Crassostrea gigas; Stress; Heat shock; Mortality. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00080/19095/16690.pdf |
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| Baud, Jean-pierre; Goyard, Emmanuel. |
| Variability of oyster quality at marketable size in winter was assesed by using a proportional sampling strategy based upon the yearly production of the oyster packing house. Landings per unit of production were estimated using the number of commercialized sanitary certification labels or/and the annual landings declared to the Veterinary Services. The range of variability for 15 parameters was estimated using the national monitoring network (REMORA) data outputs and a regional questionnaire. Both data sources showed similar results. Condition indices and morphological factors led to the highest variability. However, these conclusions should be confirmed by additional studies considering seasonal trends to assess the described quantitative relationships. |
| Tipo: Text |
Palavras-chave: Programme qualité; Huître creuses; Crassostrea gigas; Quality monitoring network; Oyster; Crasssotrea gigas. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00047/15871/13290.pdf |
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| Registros recuperados: 69 | |
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