Ostreid herpesvirus 1 and Pacific oyster mortality in France
Author Information
Author(s): Céline Garcia, Anne Thébault, Lionel Dégremont, Isabelle Arzul, Laure Miossec, Maeva Robert, Bruno Chollet, Cyrille François, Jean-Pierre Joly, Sylvie Ferrand, Nolwenn Kerdudou, Tristan Renault
Primary Institution: Institut Français pour la Recherche et l'Exploitation de la MER (IFREMER)
Hypothesis
Is there a causal link between Ostreid herpesvirus 1 detection and mortality in juvenile Crassostrea gigas?
Conclusion
The study found a significant relationship between OsHV-1 detection and spat mortality, particularly in sheltered environments during summer.
Supporting Evidence
- OsHV-1 was detected in 18% of the 620 samples screened.
- Mortality rates were significantly higher when samples contained moribund oysters.
- OsHV-1 detection was significantly increased during summer months.
Takeaway
The herpesvirus OsHV-1 is linked to the deaths of young oysters in France, especially when the water gets warm in summer.
Methodology
The study involved passive and active surveillance of oyster spat mortality and OsHV-1 detection through PCR analysis.
Potential Biases
Potential bias due to reliance on farmer reports for mortality events.
Limitations
The study relied on passive surveillance, which may lead to underreporting of mortality events.
Participant Demographics
Oysters sampled were Crassostrea gigas spat, younger than one year old.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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