Consulta: subjectFacets:"Ostreid herpesvirus OsHV-1"
Registros recuperados: 3
Data/hora: 06/06/2024 08:01:08

Mortality associated with OsHV-1 in spat Crassostrea gigas: role of wild-caught spat in the horizontal transmission of the disease
Provedor de dados: 5
Autores: Degremont, Lionel; Benabdelmouna, Abdellah.
The French oyster production of Crassostrea gigas is based on two sources of spat: wild-caught (WC) and hatchery-produced (HP). Massive mortality related to the ostreid herpesvirus type 1 (OsHV-1) has affected both sources in France since 2008. We investigated the mortality in juvenile C. gigas due to the horizontal transmission of OsHV-1 within (separated condition) and between (mixed condition) the two spat sources in three environments from April to June 2010. In the separated condition, no mortality was observed in the HP batches, while the WC batches experienced moderate to high mortality (40–80 %). In contrast, the WC and HP batches experienced high mortality in all tested environments for the mixed condition. At the beginning of the trial, the HP...
Tipo: Text
Palavras-chave: Crassostrea gigas; Wild-caught; Hatchery-produced; Spat; Mortality; Horizontal transmission; Ostreid herpesvirus OsHV-1.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29921/28387.pdf

Effect of ploidy on the mortality of Crassostrea gigas spat caused by OsHV-1 in France using unselected and selected OsHV-1 resistant oysters
Provedor de dados: 5
Autores: Degremont, Lionel; Ledu, Christophe; Maurouard, Elise; Nourry, Max; Benabdelmouna, Abdellah.
The effect of ploidy on the mortality of Crassostrea gigas spat caused by the ostreid herpesvirus (OsHV-1) genotype μVar was investigated at five sites along the Atlantic coast in France in 2011. Sibling diploids and triploids were produced using either unselected or selected OsHV-1-resistant oysters. No significant interactions were found between the factors of environment, genotype and ploidy at the endpoint dates. The mean mortality rates at the sites were 62 and 59% for diploids and triploids, respectively, and the two rates were not significantly different. The mean mortality rates were 33 and 32% for sibling diploids and triploids, respectively, when OsHV-1-resistant parents were used, and 91 and 85%, respectively, when unselected parents were used....
Tipo: Text
Palavras-chave: Diploid; Triploid; Mortality; Crassostrea gigas; Ostreid herpesvirus OsHV-1.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00199/31028/29427.pdf

Is horizontal transmission of the Ostreid herpesvirus OsHV-1 in Crassostrea gigas affected by unselected or selected survival status in adults to juveniles?
Provedor de dados: 5
Autores: Degremont, Lionel; Guyader, Tanguy; Tourbiez, Delphine; Pepin, Jean-francois.
Massive mortality outbreaks, mostly affecting spat Crassostrea gigas, have been reported in France since 2008. Disease investigations revealed that most of the mortality events are related to the detection of the Ostreid herpesvirus 1 (OsHV-1 μVar). Meanwhile, selection to improve the survival in juvenile C. gigas has been successfully implemented in this context and selected oysters were found disease-resistant to OsHV-1 infection. This paper reports the first investigation of the horizontal transmission of the disease throughout cohabitation trials within batch and between batches using unselected and selected oysters for their higher survival. Two batches, unselected (AC) and selected (AR), were produced in February 2009 and deployed in the field in...
Tipo: Text
Palavras-chave: Crassostrea gigas; Disease resistance; Ostreid herpesvirus OsHV-1; Horizontal transmission; Pacific oyster.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00142/25310/23383.pdf