matt asi-update-shellfish-futures-2012
TRANSCRIPT
![Page 1: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/1.jpg)
ASI Update
![Page 2: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/2.jpg)
Topics covered today
• R&D - Condition Project – Shell density
– Mortality
– POMS
• Commercial Stock – Stock details
– Availability
![Page 3: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/3.jpg)
Shell Density
• Shell density measures made on 42 families from the 2009 year class
• mostly 9 animals per family (3 animals, 3reps)
• Measures were made on the lower (cupped) shell only.
• Dry weight/submerged weight
![Page 4: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/4.jpg)
Shell Density-Results
• average shell density was 2.3 g / cm3
• Shell density is under strong genetic control
• Heritability of shell density = 0.56
• Low phenotypic variation of shell density
• Shell density and shell weight have slight negative correlation (rg = -0.26)
• Unknown correlation with shell density and qualitative shell assessments
![Page 5: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/5.jpg)
What’s next?
• PhD student looking at shell structural properties
• Relate shell quality to survival
• Incorporate into breeding program
![Page 6: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/6.jpg)
Mortality-SAMS
• Large effort being put into building on previous results
• YC09 generation suffered mortality event at Smoky Bay in August 2011
• Cleanest mortality data to date
• Results showed a strong genetic correlation
• Replicates close
• Best surviving families have genetic links
• Genetic links to high surviving commercial families
![Page 7: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/7.jpg)
SAMS- What’s next?
• Repeat Smoky Bay test
• Cowell and Coffins Bay stress test with young spat
• YC11 generation
• ~2-3mm input size
• Subject to commercial stressors
• Gabby’s honors project
![Page 8: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/8.jpg)
POMS background
• Feb 2011 - POMS confirmed as being present in Australia. Georges River, NSW
• Apr 2011 – ASI stock subjected to natural challenge In Georges R.
• Apr 2012 – ASI stock subjected to 2nd natural challenge in Georges R.
• June 2012 – Results analysed and EBV’s generated
![Page 9: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/9.jpg)
POMS 2nd natural challenge
• Families produced in Nov/Dec 2011
• Moved to Port Stephens in March 2012
• 43 families ~ 1000-2000 per family
• Freshwater inputs hindered deployment
• Deployed to Georges R. Apr 2012
![Page 10: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/10.jpg)
POMS 2nd natural challenge
Family challenge site in Woolooware Bay, Georges River, NSW. A total of 9 trays were used and trays were configured in a planned field design and all on a single oyster rack.
![Page 11: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/11.jpg)
POMS 2nd natural challenge
![Page 12: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/12.jpg)
Some Considerations
• Small spat used
• Management tools not used
• Don’t need 100% survival to be of immediate value to industry
• Infection rates if susceptible families not present
![Page 13: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/13.jpg)
Some rithmatic !
• Total cost of work = 75K
• 75/2.8= 26K national industry money
• 26/3= 9K Tas contribution
• State Gov contribution?
• 9K/70=$128 per grower
• Value for money???
![Page 14: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/14.jpg)
What next ?
• R&D project in development with the following objectives
– To measure levels of resistance within the ASI program
– To correlate natural field challenge and infectivity model results
– To evaluate breeding strategy options for inclusion of POMS resistance within the program and how this relates to existing trait selection.
– To investigate the establishment of a broodstock repository with animals that have survived a challenge event
![Page 15: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/15.jpg)
Commercial- Cameron’s
• Cameron’s produced line based on performance traits but also POMS trial
• Excellent grower feedback so far
• Timely supply guaranteed
• ASI also performed cross and performed well in 2nd POMS trial
![Page 16: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/16.jpg)
Commercial-Shellfish Culture
• Line 8A available this spring
• 3rd season of production, known performer
• Producing another batch for summer sales based on SAMS results and performance traits
• ASI triploid crosses also available
![Page 17: Matt asi-update-shellfish-futures-2012](https://reader037.vdocuments.us/reader037/viewer/2022110310/55a2ba211a28ab495f8b45f3/html5/thumbnails/17.jpg)
Genetics not always straight forward