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| Registros recuperados: 134 | |
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| Taris, Nicolas; Sauvage, Christopher; Boudry, Pierre. |
| Oysters, like many other marine bivalves, are characterized by high fertility and low survival rates during the precocious stages. Hatchery reproduction, realised in very different conditions than in their natural habitat (density, food, temperature, etc.), tends to optimize the production of larvae and juveniles. As a consequence, slow growing larvae are systematically culled. Previous results suggest the existence of a genetic variability linked to precocious development. Our approach consists in studying the evolutionary process (genetic drift and selection) linked with hatchery reproduction. Thanks to microsatellite markers enabling us to analyse the relatedness in "mixed" cultivated families, we studied the variability of breeding success in... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Huîtres; Marqueurs microsatellites; Reproduction; Sélection; Dérive génétique; Variabilité génétique; Génétique. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3481.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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| Heral, Maurice; Zanette, Yvan; Deslous-paoli, Jean-marc; Robert, Jean-michel; Razet, Daniel. |
| In 1979 and 1980, the characteristics of the particulate organic matter are defined fortnightly through seston analyses. It is very high in the basin and very low in the finishing ponds. The phytoplanktonic biomasses are maximal in May in the estuary, and in June-July in the finishing ponds, with chlorophyll contents 10 times higher than those monitored in the basin. Proteins are generally the main biochemical components found in both environments, with glucids accounting for 20 % and lipids for only 10 % of the biochemical components on average. The C/N ratios are almost constant in the finishing ponds with values around 5, typical of phytoplankton, whereas they are very high in the basin except in spring. In the same way, the protid/chlorophyll and the... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Huîtres; Mollusques; Qualité eau; Seston; Matière organique; Claires ostréicoles; Bassin Marennes Oléron. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/acte-6213.PDF |
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| Huvet, Arnaud; Fabioux, Caroline; Lapegue, Sylvie; Boudry, Pierre. |
| Crassostrea angulata and Crassostrea gigas, two cupped oysters of Asian origin (O'Foighil et al, 1998), have been introduced successively in Europe during the XVlth and the XXth century (Grizel et Héral, 1991). The present populations of C. angulata appear to be limited to the south of Spain and Portugal, whereas the distribution of C. gigas in Europe is rising because of the development of oyster farming. The distinction between the two subspecies in based on a RFLP marker of the mitochondrial genome (COI) which shows a strong genetic differentiation between the two subspecies populations (Boudry et al., 1998). On the contrary, the nuclear markers (microsatellites) showed a smaller genetic differentiation between them (Huvet et al, under press). The... |
| Tipo: Text |
Palavras-chave: Microsatellite; Hybridation; Crassostrea angulata; Crassostrea gigas; Huîtres; Génétique. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/acte-3282.pdf |
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| Boudry, Pierre; Collet, Bertrand; Cornette, Florence; Hervouet, Veronique; Kotoulas, G.; Bonhomme, Francois. |
| Oysters, like many other marine species, are characterized by very high fertilities. Natural or hatchery populations, often present very low Ne/N ratios (Hedgecock, 1994). It can be explained by very high variances of their breeding success (Li and Hedgecock, 1998), the effective population size being estimated through the temporal variance of the allelic frequencies in natural populations (Hedgecock et al., 1992) or, more directly, through the estimated number of founders in hatchery populations (Launey, 1998). This document is a presentation of the results of a number of experiments, realised in the scope of the European program "GENEPHYS" (FAIR 95-421), and using microsatellite markers to analyse the parental contributions in the flat oyster Crassostrea... |
| Tipo: Text |
Palavras-chave: Microsatellite; Succès reproducteur; Contributions parentales; Génétique; Crassostrea gigas; Huîtres. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-3454.pdf |
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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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| Soletchnik, Patrick; Le Moine, Olivier; Razet, Daniel; Geairon, Philippe; Faury, Nicole; Goulletquer, Philippe; Robert, Stephane. |
| The Marennes-Oléron Bay is the first cupped oyster production site (35,000 tons/year). For more than 10 years, this species has suffered chronic mortality episodes. A research program has been developed since 1994 in association with the professional sector, in order to try and explain these mortalities. |
| Tipo: Text |
Palavras-chave: Production; Croissance; Modélisation; GIS; Système d'Informations Géographique; Crassostrea gigas; Huîtres; Mortalités estivales. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-3377.pdf |
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| Haure, Joel; Huvet, Arnaud; Palvadeau, Hubert; Nourry, Max; Penisson, Christian; Boudry, Pierre; Martin, Jean-louis. |
| A comparative study of the growth performances in cupped oysters Crassostrea gigas, Crassostrea angulata and their hybrids was conducted from March to October 1999 in a controlled farm with phytoplankton (Skeletonema costatum) input. The individuals, of the same age, were from genitors which had been identified through a marker analysis of the mitochondrial genome (Boudry et al, 1998). As a consequence, two pure offspring were obtained through the crossing of Portuguese oyster C. angulata (AA) genitors and the crossing of Japanese oyster C. gigas (GG) genitors. Two other offsprings were produced through the hybrid crossing of C. gigas female genitors with C. angulata (GA) male genitors on one hand, and C. angulata female genitors with C. gigas (AG) male... |
| Tipo: Text |
Palavras-chave: Géniteur; Génétique; Performances croissance; Crassostrea gigas; Crassostrea angulata; Huîtres. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/acte-3281.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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| Cantin, Christian. |
| Après avoir rapidement présenté le Bassin d'Arcachon et son environnement (situation géographique et réseau hydrologique), et rappelé quelques données sur l'ostréiculture, le tourisme et le réseau d'assainissement, le réseau de surveillance microbiologique (REMI) est décrit depuis sa mise en place en 1989 (réseau principal) jusqu'à son évolution en 1995 avec la mise en oeuvre d'un réseau étendu. Les résultats des analyses effectuées mensuellement sur les huîtres, au cours de ces sept années, sont présentés pour chaque station sous forme graphique, répartis en quatre secteurs géographiques. lls ont été interprétés pour chaque réseau en fonction des quatre zones de salubrité définis par l'arrêté relatif aux classements des zones de production, et, ensuite... |
| Tipo: Text |
Palavras-chave: Bactériologie; Huîtres; Bassin d'Arcachon; Bacteriology; Oysters; Bay of Arcachon. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00427/53819/54808.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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| Registros recuperados: 134 | |
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