Case study of vertical transmission of ostreid herpesvirus-1 in Pacific oysters and biosecurity management based on epidemiological data from French, New Zealand and Australian hatchery-propagated seed

• Published in: Aquaculture Research
• Main Authors: Trotter, AJ, Vignier, J, Wilson, TK, Douglas, M, Adams, SL, King, N, Cunningham, MP, Carter, CG, Boudry, P, Petton, B, Degremont, L, Smith, GG, Pernet, F
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Blackwell Publishing Ltd 2021
• Subjects: biosecurity; Crassostrea gigas; epidemiology; ostreid herpesvirus (OsHV-1); oyster farming; vertical transmission; New Zealand; Pacific; Pacific oyster
• Online Access: https://eprints.utas.edu.au/42421/

In recent decades, mortality caused by ostreid herpesvirus (OsHV-1)and a variant (OsHV-1μvar) has severely impacted the productionof Pacific oyster, Crassostrea gigas, chronologically in France, NewZealand (NZ) and Australia (Jenkins et al., 2013; Keeling et al., 2014;Segarra et al., 2010). This study was conceived based on observationsmade in several commercial hatcheries and research institutesin these countries where vertical transmission of OsHV-1μvar hasbeen absent or extremely rare. We have collated data from the productionof Pacific oysters across these countries to assess the riskassociated with breeding oysters from broodstock grown in OsHV-1μvar-infectedwaters. The aim is to provide a reference point forregulatory authorities to use when developing or updating biosecuritymanagement policy associated with the hatchery production ofPacific oysters.