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| Registros recuperados: 74 | |
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| Gerard, Andre; Naciri, Yamama; Peignon, Jean-marie; Ledu, Christophe; Phelipot, Pascal; Baud, Jean-pierre; Nourry, Max; Haure, Joel; Coatanea, Denis; Oheix, Jocelyne; Vercelli, Catherine; Chabirand, Jean-michel; Borel, Michel; Maurer, Daniele; Heurtebise, Serge; Garnier, Jacqueline; Martin, Anne-genevieve; Tige, Gilbert; Mazurie, Joseph; Langlade, Aime. |
| Cette réunion des membres du Réseau Génétique Mollusques avait pour objet de faire un bilan provisoire des actions en cours et surtout de mettre en place les protocoles et les calendriers du début de l'année 1994. La première demi-journée a été réservée à un exposé de Yamama NACIRI sur les bases de la Génétique Quantitative et ses applications dans le cadre des programmes de sélection des mollusques.La deuxième demi-journée a été consacrée au bilan des actions de 1993. Les représentants de chaque site, intervenant dans une opération du réseau en 1993, ont fait une présentation orale de leurs résultats. Un résumé de chaque intervention vous est fourni dans ce document. Il est important de souligner que tous ces bilans sont provisoires, en premier lieu parce... |
| Tipo: Text |
Palavras-chave: Génétique; Sélection génétique; Huître plate; Ostrea edulis; Croissance; Génétique population. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00049/15982/13425.pdf |
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| Normand, Julien; Ernande, Bruno; Haure, Joel; Mccombie, Helen; Boudry, Pierre. |
| Early reproductive effort and growth were measured in 3 groups of the Pacific oyster Crassostrea gigas: 1 diploid group and 2 triploid groups resulting from either chemical induction (3nCB) or crosses between tetraploid and diploid parents (3nDT). Oysters were reared under intensive nursery conditions and sampled when 5 mo old. Reproductive effort was estimated by cross-sectional area measurements of the visceral mass (i.e. gonadic occupation) and maturation stage was assessed by qualitative histology. As expected, comparison of the reproductive patterns of these 3 groups revealed a lower reproductive effort in triploid individuals relative to diploid. However, gonadic occupation in triploid oysters was higher than expected in both 3nCB and 3nDT groups, as... |
| Tipo: Text |
Palavras-chave: Triploidy; Oyster; Gametogenesis; Crassostrea gigas. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6978.pdf |
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| Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Haure, Joel. |
| The recent appearance and invasion of feral oysters (Crassostrea gigas) along the northern European Atlantic coast, underscores the necessity to investigate the relationship between environmental variables, reproductive physiology, larval development and recruitment. We studied these relationships at both high (HT) and intermediate (IT) - turbidity sites, through historical data on water temperatures, multi-parameter environmental probes, histological analyses, and field collections of planktonic larvae and settled post-larvae in 2005 and 2006. A progressive warming trend was observed, especially since 1995, when oyster proliferation first became severe. Threshold temperatures for oocyte growth, larval development and settlement were achieved in both 2005... |
| Tipo: Text |
Palavras-chave: Aquaculture; Climate warming; Coastal waters; Crassostrea gigas; Reproductive cycle; Oyster larvae; Settlement; Turbidity. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00000/11150/7938.pdf |
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| Haure, Joel; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Martin, Jean-louis. |
| A study was realized to automate the distribution of phytoplankton (Skeletonema costatum) in the extensive breedings of shells of commercial interest. Physical parameters were selected to define their domain of application for the realization of such a project The work was realized in spring (in June, 1999) and in autumn (in November, 1999) in different dilution of phytoplankton in a treated subterranean salt water. The results showed that the fluorescence gave a better sensibility to inter seasonal in the explanation of the distributed food, but lost as representation during the night-phases, On the other hand, the absorption ( optical density) presented less daily variability and with good correlations with the nourishing concentration of the environment... |
| Tipo: Text |
Palavras-chave: Fluorescence in vivo; Absorption in vivo; Automatisation; Skeletonema costatum; Fluorescence in vovo; Absorption in vivo; Automation; Skeletonema costatum. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00047/15870/13289.pdf |
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| Dutertre, Mickael; Ernande, Bruno; Haure, Joel; Barille, Laurent. |
| Spatial and temporal variations in gill and palp size were studied during 1 year in naturally-settled populations of the Pacific oyster Crassostrea gigas, reciprocally transplanted between two contrasting sites located along a marked gradient of turbidity conditions. The variability of suspended particulate matter (SPM) and food particles, estimated by the concentration of chlorophyll-a, was measured with in situ water-quality probes. Over a full seasonal cycle, oysters exposed to high-turbidity (HT) conditions exhibited a lower gill-to-palp (G:P) ratio, compared with those exposed to low-turbidity (LT) conditions. Seasonal variations in the G:P ratio were observed at the LT site in relation to the spring phytoplanktonic bloom, but differed from those that... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00351/46223/46145.pdf |
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| Cognie, B; Haure, Joel; Barille, L. |
| The Pacific oyster, Crassostrea gigas, well known throughout the world because of its ability to adapt to a wide range of environmental conditions, was introduced for cultivation into France on a massive scale in the 1970s. With global warming, the reproductive population, confined at the beginning to the south of the French Atlantic coast, became established at more northern latitudes (above 45 degrees 58'N), and wild C gigas began to colonize coastal areas such as our study site, Bourgneuf Bay (1 degrees-2 degrees W, 46 degrees-47 degrees N), an oyster-farming site. An original approach, based on orthophotograph analysis and in situ biomass sampling, revealed that, in the northern part of this bay, more than 70% of the total C gigas biomass was composed... |
| Tipo: Text |
Palavras-chave: Orthophotographs; Invasion; Wild stock; Introduced species; Crassostrea gigas. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1878.pdf |
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| Buzin, Florence; Dupuy, Beatrice; Lefebvre, Sebastien; Barille, Laurent; Haure, Joel. |
| In response to the closure of shellfish production sites due to increasing occurrence of toxic algal blooms, land-based recirculating aquaculture systems (RAS) could be used by producers to store a proportion of their stock temporarily. An RAS prototype was tested in this study to store Pacific oyster Crassostrea gigas over a range of temperatures. In such systems, the water temperature is a variable that could influence the bivalve excretion rate of ammonia, the concentration of which may become critical for the water quality. In this study, we first estimated the total ammonia nitrogen (TAN, N-NH4+ + N-NH3) excretion of the Pacific oyster and then investigated whether the bacterial population associated with the oysters could act as a natural biofilter... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Ammonia excretion; Nitrification rate; Recirculating system; Temperature. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00248/35889/34409.pdf |
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| Martin, Jean-louis; Haure, Joel; Dupuy, Beatrice; Nourry, Max; Palvadeau, Hubert; Papin, Mathias; Penisson, Christian; Thouard, Emmanuel. |
| L'ostréiculture en baie de Bourgneuf connaît depuis quelques années des difficultés qui sont liées à de mauvaises performances de croissance des huîtres mais aussi à une augmentation significative du captage naturel de naissain qui recouvre non seulement les zones de roches mais aussi les infrastructures d'élevage et le cheptel proprement dit. Les études menées depuis 2001 (Haure et al., 2002 ; Barillé et al., 2003 ; Martin et al., 2003 ; Martin et al, sous presse) sur les estimations de stocks d'huîtres dans la baie de Bourgneuf montrent l'importance quantitative des huîtres sauvages par rapport aux huîtres cultivées : le stock d'huîtres sauvages représente plus de la moitié des huîtres cultivées. Il est à la fois la conséquence de la recrudescence du... |
| Tipo: Text |
Palavras-chave: Huître creuse; Crassostrea gigas; Émission de larves; Fixation; Baie de Bourgneuf.. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00680/79234/81749.pdf |
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| Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Rosa, Philippe; Barille, Anne-laure; Haure, Joel. |
| The proliferation of the voluntarily-introduced cupped oyster, Crassostrea gigas, has attained the proportions of species invasion in many intertidal habitats in Europe, presumably resulting from successful reproduction of farmed individuals. It is thus imperative to better understand the reproductive characteristics of farmed oysters, since they are directly under human control. We quantified the dry tissue mass (DTM), gametosomatic index (GSI), and reproductive cycle of farmed oysters at two sites in Bourgneuf Bay, France, in relation to environmental parameters using continuously-recording probes in 2005 and 2006. The GSI was developed for this study, based on the actual area occupied by gametes, rather than the area of the gonad previously used for... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Crassostrea gigas; Oyster farming; Bivalve; Gametosomatic index; Biological invasion; Atresia; Oocytes; Turbidity; Temperature; Reproduction. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6871.pdf |
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| Huvet, Arnaud; Degremont, Lionel; Labreuche, Yannick; Daniel, Jean-yves; Dubrunfaut, Thomas; Boudry, Pierre; Haure, Joel; Bedier, Edouard; Ropert, Michel; Herpin, Amaury; Cunningham, Charles; Moal, Jeanne; Samain, Jean-francois. |
| Summer mortality associated with juveniles of the oyster Crassostrea gigas is the result of a complex interaction between the host, pathogens and environment. Divergent selection based on summer survival have been applied to produce families with resistant and susceptible progeny. Here, we describe the use of suppression subtractive hybridization to generate 150 clones that were differentially regulated between resistant and susceptible F2 progeny. The nucleotide sequence of these 150 clones was determined. Among the 25 unique sequences that matched with the products of known genes, those putatively implicated in energy generation (12%) and immune function (16%), systems suspected to be implicated in summer mortality, were extended and analyzed by real... |
| Tipo: Text |
Palavras-chave: Selection; Gene; Genetic; Summer mortality; Crassostrea gigas; Pacific oysters. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/acte-3447.pdf |
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| François, Cyrille; Haure, Joel; Billy, Jean-christophe; Renault, Tristan. |
| Background The Quality Assurance and Laboratory Standards Committee of the American Society for Veterinary Clinical Pathology and the guidelines of the Clinical and Laboratory Standards Institute provide a framework for establishing reference intervals of physiological parameters in reputedly healthy individuals, humans, and terrestrial animals, respectively. This framework was applied for the first time to the Pacific cupped oyster, Crassostrea gigas. Reference intervals (RIs) would, first, be of interest for research purposes, including pathophysiology studies. RI determination is the first step before considering the use of RIs for field applications by farmers and marine shellfish health services. Objectives The purpose of this study was to propose... |
| Tipo: Text |
Palavras-chave: Bivalvia; Clearance rate; Health; Ostreidae; Oxygen consumption rate; Reference values. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00627/73913/73286.pdf |
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| Baud, Jean-pierre; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Haure, Joel. |
| Dans le cadre d'un programme de prospection, mené par la Direction Départementale de l'Agriculture de la Vendée, des forages exploratoires, réalisés en divers point du littoral de la baie de Bourgneuf, ont mis à jour une quantité importante d'eau salée souterraine tant sur l'île de Noirmoutier que sur le continent (Bresson, 1982). |
| Tipo: Text |
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| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00304/41499/40707.pdf |
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| Registros recuperados: 74 | |
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