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| Normand, Julien; Blin, Jean-louis; Jouaux, Aude. |
| Early detection of Pacific oyster spat infected with ostreid herpesvirus 1 (OsHV-1) could prevent introduction of OsHV-1-infected individuals into farming areas or onshore rearing facilities, thus reducing the risk of infection of naïve oysters in such production systems. Experiments were conducted on several hundred oyster spat provided by producers in order to examine whether early rearing practices could be considered as potential risk factors for (1) OsHV-1 infection as detected by molecular methods and (2) spat mortality experimentally induced through thermal challenge. Spat groups collected on oyster beds and hatchery spat reared in growout areas during summer exhibited higher viral DNA contamination and mortalities during the trial than spat kept in... |
| Tipo: Text |
Palavras-chave: Oyster spat; Epidemiology; OsHV-1; QPCR; Thermal challenge. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00203/31407/29797.pdf |
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| Dheilly, Nolwenn M.; Jouaux, Aude; Boudry, Pierre; Favrel, Pascal; Lelong, Christophe. |
| Background: Triploidy can occur in many animal species but is often lethal. Among invertebrates, amphibians and fishes, triploids are viable although often sterile or infertile. Most triploids of the Pacific oyster Crassostrea gigas are almost sterile (named "3n beta'') yet a low but significant proportion show an advanced gametogenesis (named "3n alpha''). These oysters thus constitute an interesting model to study the effect of triploidy on germ cell development. We used microarrays to compare the gonad transcriptomes of diploid 2n and the abovementioned triploid 3n beta and 3n alpha male and female oysters throughout gametogenesis. Results: All triploids displayed an upregulation of genes related to DNA repair and apoptosis and a downregulation of genes... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00239/34992/33538.pdf |
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