Table 2
Overview of number of broodstock oysters screened at Wageningen Marine Research; number of oysters without Bonamia infection used in hatcheries (RvY = Roem van Yerseke and ZS = Zeeschelp); negative Bonamia results for larval batches released and seed produced by these pre-screened broodstock oysters. Number of pools for pooled samples is presented in parenthesis.
Screening date | Total # oysters | # Neg | Sampling date | # Larvae batches | # Neg | # Seed | # Neg | Hatchery |
---|---|---|---|---|---|---|---|---|
30 April 2018 | 149 | 137 | June–August 2018 | 9 | 9 | (2) | (2) | RvY |
30 April 2018 | 149 | 137 | 28 July 2019 | 12 | 12 | (3) | (3) | RvY |
7 October 2019 | 200 | 136 | – | – | – | – | – | RvY |
11 May 2020 | 145 | 105 | June and July 2020 | 9 | 9 | 240 (56) | (56) | ZS |
12 April 2021 | 182 | 163 | 13 July 2021 | – | – | 145 (27) | (27) | RvY |
17 May 2021 | 180 | 149 | August 2021 | – | – | 150 (30) | (30) | ZS |
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