Table 1.
Crassostrea gigas samples collected at different European sites and analysed in this study (n + number of samples/total number of analysed samples scoring positive to species‐specific qPCR targeting the pathogen V. aestuarianus or OshV‐1 in oyster tissues).
| Sampling date | Code | Age | Origin | Ploidy | Mortality (%) | OshV‐1 (Real‐time PCR) | V. aestuarianus (Real‐time PCR) |
|---|---|---|---|---|---|---|---|
| Ebro Delta (Spain) | |||||||
| 13_04_2016 | EbDva13apr16/EbH13apr16 | Adult | Nature | Diploid | 23% (Up to 50%) | 0+/30 | 22+/30 |
| 26_04_2016 | EbDoshV26apr16(c3)/EbH26apr16(c4) | Spat | Nature | Diploid | 76% (Up to 90%) | 17+/30 | 0+/30 |
| 26_04_2016 | EbDoshV26apr16(c5)/EbDva26apr16(c6)/EbH26apr16(c6) | Spat | Nature | Diploid | 46.6% (Up to 80%) | 21+/30 | 4+/30 |
| 19_07_2016 | EbDoshV19jul16/EbH19jul16 | Spat | Hatchery | Diploid | 3% (light mortality) | 1+/30 | 0+/30 |
| 19_07_2016 | EbH19jul16(c2) | Spat | Nature | Diploid | No mortality | 0+/30 | 0+/30 |
| 24_11_2016 | EbH24nov16/EbDoshV24nov16/EbDva24nov16 | Spat | Nature | Diploid | 30% recent mortality | 7+/30 | 1+/30 |
| 25_01_2017 | EbH25jan17 | Spat | Hatchery | Diploid | No mortality | 0+/30 | 0+/30 |
| 26_01_2017 | EbH26jan17 | Spat | Hatchery | Diploid | No mortality | 0+/30 | 0+/30 |
| 05_05_2017 | EbDoshV5may17/EbH5may17 | Spat | Hatchery | Triploid | 87.83% mortality | 10+/18 | 0+/18 |
| 05_05_2017 | EbH5may17(c1) | Spat | Hatchery | Triploid | No mortality | 0+/30 | 0+/30 |
| 31_05_2017 | EbDva31may17/EbH31may17 | Spat | Hatchery | Triploid | 85% mortality | 0+/30 | 9+/30 |
| Dungarvan Bay (Ireland) | |||||||
| 05_07_2016 | DrDva7jul16/DrH7jul16 | Adult | Hatchery | Triploid | 20% | 0+/30 | 2+/30 |
| 05_07_2016 | DrDoshV7jul16SPAT/DrDva7jul16SPAT/DrH7jul16SPAT | Spat | Hatchery | Triploid | 70%–100% | 25+/30 | 3+/30 |
| 03_10_2016 | DrDva3oct16/DrH3oct16 | Adult | Hatchery | Triploid | End of mortality | 0+/30 | 11+/30 |
| 03_10_2016 | DrDoshV3oct16SPAT/DrDvaV3oct16SPAT/DrH3oct16SPAT | Spat | Hatchery | Triploid | End of mortality | 12+/30 | 1+/30 |
| 10_01_2017 | DrH10jan17 | Adult | Hatchery | Triploid | No mortality | 0+/30 | 0+/30 |
| 10_01_2017 | DrH10jan17SPAT | Spat | Hatchery | Triploid | No mortality | 0+/30 | 0+/30 |
| Bay of Brest (France) | |||||||
| 10_07_2017 | BbDoshV10jul17/BbDva10jul17/BbH10jul17 | ad/sp/jv | Hatchery | Diploid | Mortality | 2+/12 | 2+/12 |
| 05_10_2017 | BbDoshV5oct17/ BbDva5oct17/BbH5oct17 | ad/sp/jv | Hatchery | Diploid | No mortality | 3+/15 | 1+/15 |
Code legend = [Eb, Ebro delta; Dr, Dungarvan bay; Bb, Bay of Brest]/[D, Infected; H, Not Infected]/[va, Vibrio aestuarianus; oshV, Ostreid herpesvirus 1]/[collection date].