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| Registros recuperados: 10 | |
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| Degremont, Lionel; Maurouard, Elise; Godfrin, Yoann; Travers, Marie-agnes; Morga, Benjamin; Lamy, Jean-baptiste; Benabdelmouna, Abdellah. |
| Depuis 2012, le nombre de cas de mortalités d’huîtres creuses adultes (Crassostrea gigas) rapportés dans le cadre des réseaux de surveillance de l’Ifremer, et dans lesquels la bactérie Vibrio aestuarianus a été isolée, a fortement augmenté. Les objectifs de cette étude étaient (1) d’étudier la sensibilité des huîtres C. gigas à une infection à V. aestuarianus pour des lots diploïdes et triploïdes et (2) déterminer la réponse à la sélection pour une meilleure résistance à V. aestuarianus pour des huîtres C. gigas. Neuf stocks ont été utilisés, répartis en trois niveaux de sélection, chacun étant donc répliqué par trois pontes. Pour chaque stock, un lot diploïde (2n), un lot triploïde (3n_chim) produit par la rétention d’un globule polaire, et trois lots... |
| Tipo: Text |
Palavras-chave: Vibrio aestuarianus; OsHV-1; Sélection; Résistance; Triploïdes; Huître creuse; Crassostrea gigas; Vibrio aestuarianus; OsHV-1; Selective breeding; Disease resistance Pacific oyster; Crassostrea gigas; Triploids. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00404/51530/52140.pdf |
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| De Decker, Sophie. |
| The New-Caledonian shrimp industry is based on the controlled reproduction of the shrimp Litopenaeus stylirostris, a species which was introduced in the 80s. The major difficulty to which the industry has been faced for 10 years is the occurrence of the “Syndrome 93”, which corresponds to mortality phases when the temperature falls down in April-May-June. This mortality is associated to the pathogenic bacteria Vibrio penaecida. An experiment of genetic selection based on the criterion ofsurvival to Syndrome 93 has been conducted at the Laboratory of Aquaculture of New Caledonia. The 3rd selected generation had demonstrated very encouraging results (survival rates improved by around 20% in experimental infections with V. penaeicida). These results have not... |
| Tipo: Text |
Palavras-chave: Amélioration génétique; L. stylirostris; Résistance; Syndrome 93; Genetic improvement; L. stylirostris; Disease resistance; Syndrome 93. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00204/31527/29943.pdf |
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| Aquacop, Aquacop; Le Moullac, Gilles; Damez, D. |
| The notion of penaeid shrimp postlarvae quality, which implies a survival potential, is still a subjective parameter. The zootechnical criteria and the visual observations are not sufficient to evaluate the physiological condition of the hatchery reared postlarvae. The resistance of postlarvae to salinity shocks is a representative criteria of their condition. The goal of this study is to present a non-linear regression model at 2 variables (size, salinity) for the P. vannamei postlarvae resistance to salinity shocks. Between the second and the twentieth day after metamorphosis; 5 salinity shocks (20, 15, 10, 5 and 20/00) were tested daily, each one with 50 postlarvae. Survival rates were recorded after 2 hrs. Concurrently, the postlarvae growth in the... |
| Tipo: Text |
Palavras-chave: Salinity; Resistance; Growth; Postlarvae; Penaeus vannamei; Salinité; Résistance; Croissance; Postlarve; Penaeus vannamei. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/publication-4430.pdf |
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| Goyard, Emmanuel; Goarant, Cyrille; Bachere, Evelyne; De Lorgeril, Julien; Mugnier, Chantal; Ansquer, Dominique; Broutoi, Francis; Brun, Pierre; Imbert, Frederic; Justou, Carole; Maillez, Jean-rene; Patrois, Jacques; Pham, Dominique; Peignon, Jean-marie. |
| The New-Caledonian shrimp industry is based on the controlled reproduction of the shrimp Litopenaeus stylirostris, a species which was introduced in the 80s. The major difficulty to which the industry has been faced for 10 years is the occurrence of the "syndrome 93", which corresponds to mortality phases when the temperature falls down in April-May-June. This mortality is associated to the pathogenic bacteria Vibrio penaecida and is expressed at different levels which are variable from year ta year and from pond to pond. No resistance to this pathology has been developed spontaneously. This is likely due to the protocole used to rear spawners, which does not allow to implement an efficient selective pressure at each generation An experimental selection... |
| Tipo: Text |
Palavras-chave: Amélioration génétique; P. styliroslris; Résistance; Syndrome 93; Lyzozyme; Genetic improvement; P. styliroslris; Résistance; Syndrome 93; Lyzozyme. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00109/22020/19643.pdf |
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| Registros recuperados: 10 | |
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