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Abstract Water
Oyster

2020
 

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2020 TAS Broodstock

Year Class in Review

79 2020 families were produced at IMAS Taroona from 17/09/2020 - 21/10/2020 using 2016, 2017 and 2018 broodstock. Four spat trials were deployed, with the first being deployed in 16/12/2020 for POMS exposure trials at Pittwater, Pipeclay and Little Swanport.

EBV + Inbreeding Values

As we did not observe any POMS mortality in our 2020 trials, the families have been allocated based on predicted EBV's in Tasmania. Predicted EBV’s should provide reasonable estimates of POMS resistance but the accuracy will increase as we are able to add more data. To fast track and maximise our chances of collecting data to strengthen the predicted EBV's, we set up a 1-year-old POMS trial at Pittwater on the 09/09/2022 and collected data on the 09/03/2022. The smallest spat from this year class and achieved low-moderate heritability. We achieved a much better result from our YC2021 with our two trials showing medium-high heritability which has strengthened our YC2020 EBV's for the South Australia allocations. 

The button below takes you to a separate CSIRO website which allows hatcheries to calculate inbreeding/EBV values. For further questions, please refer to FAQ's page or contact the General Manager, Lewa.

YC20 TAS

Broodstock Pictures

Broodstock Pictures

2020 SA Broodstock

Allocation information

EBV + Inbreeding Values

81 2020 families were produced at SARDI from 07/10/2020 - 03/11/2020 using 2016 and 2017 broodstock. Eight SA survival spat trials were deployed at Smoky Bay, Coffin Bay, Cowell, Denial Bay and Streaky Bay.

Due to mild weather conditions, the YC2020 stock experienced little mortality. However recent YC2021 stock has had excellent trials with high heritabilities. As a result, this has strengthened the EBV's for the YC2020. For the SA YC2020 translocation stock, please read the YC2020 TAS broodstock section above.

The button below takes you to a separate CSIRO website which allows hatcheries to calculate inbreeding/EBV values. For further questions, please refer to FAQ's page or contact the General Manager, Lewa.

Broodstock Pictures

YC20 SA
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