38 results

Pathogenic Vibrio parahaemolyticus in Australian oysters

Project number: 2002-409
Project Status:
Completed
Budget expenditure: $13,995.00
Principal Investigator: Tom Lewis
Organisation: University of Tasmania (UTAS)
Project start/end date: 28 May 2002 - 30 Aug 2003
:

Need

In 1999, Seafood Services Australia (SSA) initiated a risk-based approach to assessing and managing hazards. Regarding oysters, two risk assessments were undertaken, one on viruses and one on vibrios. Focusing on the latter hazards, the risks associated with the three main species: V. parahaemolyticus, V. vulnificus and V. cholerae were assessed. It was noted that V. parahaemolyticus (Vp) has recently caused major outbreaks in USA from consumption of oysters due to a “new” pathogenic type O3:K6. For Australia, no work on pathogenic Vp in oysters could be found, which introduced a great deal of uncertainty to the assessment. The RA noted that there had been two Vp poisonings in NSW from prawns imported from Indonesia, the clear inference being that pathogenic Vp exists in neighbouring waters.

In March, 2002 the FAO/WHO team will develop a global risk assessment of Vp in oysters. The RA will utilise the US risk model and insert data from the oyster industries of Canada, New Zealand, Australia and Japan. If no Australian data are available on levels of Vp the modellers will make assumptions which may well be disadvantageous to the Australian industry. This could happen if the north American mitigation strategy (rapid icing) to control of Vp is adopted as a prerequisite for export.

Failure to input Australian data into a Codex global risk assessment could have serious consequences for the industry. At best it would lead to protracted negotiation between Australia and Codex. These negotiations would need to be science-based and a research program would need to be funded. It is probable that the scale of this investigation would be at least a log scale larger than the present application.

Among the strategies to mitigate V. parahaemolyticus risk is chilling oysters as early as possible after harvest. In the case of the Canadian industry in British Columbia, the strategy has been used successfully in the summers of 2000 and 2001. This strategy is directly opposed to current summer handling practices by the NSW industry which allows product to remain as warm as 25°C for up to three days.

This project is designed to provide evidence of the occurrence and prevalence of pathogenic and non-pathogenic V. parahaemolyticus in Australian oysters. This knowledge will be invaluable to the NSW industry in particular - in case the FAO/WHO assessment recommends chilling of oysters as a pre-requisite for market access.

Effect of not doing the proposed study

If the work is not done and Codex Committee on Food Hygiene (CCFH) recommend a mitigation strategy of rapid icing, the local industry has a number of choices:

1. Ignore the CCFH recommendation on the grounds that we don’t export large volumes of oysters. The problem with this approach is that Codex has just as much application and force for domestic production as it does in the export arena.

2. Undertake a study to try to show that there is no problem with V. parahaemolyticus from Australian product. This would probably be a larger study than the present one and would be mounted to attempt to gain exemption for Australia. It’s always difficult to unwind global hygiene edicts.

The present project, for a relatively modest investment, effectively places Australian data into a global risk assessment. As such the data will have great force in the modelling phase. xbad

Objectives

1. Obtain total Vibrio spp. and total V. parahaemolyticus counts from oysters from NSW, SA and Tasmania.
2. Determine prevalence of pathogenic V. parahaemolyticus amongst these isolates.
3. Compile and analyse data for potential inclusion in the FAO-WHO global risk assessment of Vibrio parahaemolyticus in oysters.

Final report

ISBN: 1-86295-071-7
Author: Dr T. Lewis Dr M. Brown Mr G. Abell Prof. T. McMeekin Dr J. Sumner
Final Report • 2003-08-22 • 350.70 KB
2002-409-DLD.pdf

Summary

This project was designed to produce a “snapshot” of the prevalence of the bacterium Vibrio parahaemolyticus in Australian oysters during March and April of 2002.

V. parahaemolyticus occurs in two main forms: pathogenic and non-pathogenic. In the past 3 years there have been several large outbreaks of food poisoning in North America from oysters contaminated with the pathogenic type of V. parahaemolyticus.

This project examined samples of oysters from NSW, Tasmania and South Australia for the total and pathogenic V. parahaemolyticus. Single samples of 10-12 oysters were collected from selected sites in each state. Bacteria from these oysters were isolated and examined using DNA probes designed to detect either total or pathogenic V. parahaemolyticus isolates.

Keywords: Vibrio parahaemolyticus, oysters, pathogenicity, risk assessment.

Industry
Industry
PROJECT NUMBER • 2016-801
PROJECT STATUS:
COMPLETED

Future oysters CRC-P: Enhancing Pacific Oyster breeding to optimise national benefits

The research was conducted as a direct consequence of the 2016 Pacific Oyster Mortality Syndrome (POMS) outbreak TAS which decimated parts of this State’s Pacific Oyster (Crassostrea gigas) industry and caused numerous flow on effects throughout the entire Australian industry. The project was...
ORGANISATION:
Australian Seafood Industries Pty Ltd (ASI)
Environment
PROJECT NUMBER • 2005-072
PROJECT STATUS:
COMPLETED

Water use across a catchment and effects on estuarine health and productivity

This research has shown that the profitability of both agriculture on land and aquaculture in the estuary is affected by changing freshwater flows. To assess the value of water to different users across a catchment we developed a generic water accounting framework and populated it with available...
ORGANISATION:
University of Tasmania (UTAS)

Seafood CRC: safe spat rearing experiment

Project number: 2013-708
Project Status:
Completed
Budget expenditure: $16,731.86
Principal Investigator: Rachel King
Organisation: Oysters Australia Ltd
Project start/end date: 31 Mar 2013 - 29 May 2014
:

Need

A FRDC funded University Sydney/EMAI project investigating the biological behaviour (epidemiology) of POMS has identified an additional need that falls outside its original project aims.

The recent incidence and subsequent loss of the industry in the Hawkesbury River, NSW also devastated test stock placed in the water by ASI. The industry must invest in all options to safeguard national production; breeding resistant oysters and alternate husbandry.
The objective of this project is to provide scientific evidence that water treatments can be applied to enable safe rearing of spat in holding tanks in a POMS affected area until the window of infection closes. There is evidence to suggest that a similar approach is used in the French oyster industry to cope with POMS.

The project objective is to treat water in land-based tanks holding spat to interrupt putative transmission mechanisms. If successful, this can be used by hatcheries to hold stock in safe rearing conditions adjacent to a potentially infected estuary until the window of infection closes, and then they will be stocked out into the estuary. This is of use for growers with leases in infected waters who require a method for rearing/conditioning hatchery spat on-shore from the time of receipt until it is safe to put them in the estuary. If POMS spreads to affected waters near hatcheries in Tasmania, they will also require a solution for safe spat production.

Objectives

1. Confirmation of the efficacy of water treatments for maintaining viable spat during a POMS transmission season in an infected environment
2. Information to benefit commercial hatcheries to enable production of spat from eggs through highly susceptible larval stages, in the face of POMS
3. Information to benefit growers who receive spat from hatcheries during a POMS transmission season
4. Information which can be integrated with husbandry (growing height modifications) to reduce mortalities in adult oysters and enable production of C. gigas in the face of POMS
5. Information which can be used to plan trials on how spat might be grown to a specific size (as distinct from just maintained) during a POMS transmission season in an infected environment

Final report

ISBN: 978-0-9874218-8-3
Author: Richard Whittington
Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Final Report • 2014-08-14 • 926.47 KB
2013-708-DLD.pdf

Summary

The production cycle of Pacific Oysters in Australia currently depends on hatchery production of spat, mainly in Tasmania. Experience in France and other European countries is that OsHV-1 affects mainly hatchery spat and juvenile oysters, with near total losses of affected batches being common. However, the observations in Australia and New Zealand are that oysters from spat through to adult stages are susceptible. The results from trials conducted in FRDC projects 2011/053 and 2012/032 have already revealed that mortality in adult stock can be kept below 50% by placing stock in cultivation structures 300 mm above standard growing height. The trials described in this report are the first to examine strategies to enable survival of spat and juvenile oysters.

The objective of this study was to obtain information about simple and practical methods to treat/disinfect water so as to develop a method for hatcheries to safely produce and rear spat in infected estuaries during the risk period for disease expression, and for hatcheries or farmers to hold spat in land based facilities during the seasonal window of infection.

Industry
PROJECT NUMBER • 2018-164
PROJECT STATUS:
COMPLETED

Commercial production trial with high POMS tolerant triploid Pacific Oysters in approved NSW estuaries.

This report details a collaborative "proof of concept" project undertaken to investigate the opportunity to reinvigorate the triploid Pacific oyster farming industry in NSW estuaries affected by Pacific Oyster Mortality Syndrome (POMS). The participating organisations were Australian Seafood...
ORGANISATION:
Australian Seafood Industries Pty Ltd (ASI)

Sustainable genetic improvement of Pacific oysters in Tasmania and South Australia

Project number: 2000-206
Project Status:
Completed
Budget expenditure: $737,531.00
Principal Investigator: Bob Ward
Organisation: CSIRO Oceans and Atmosphere Hobart
Project start/end date: 29 Dec 2000 - 4 Jan 2006
:

Need

We have demonstrated that oyster characteristics deemed valuable by industry can be improved by selective breeding. We and industry are convinced that substantial performance increases for commercial lines are achievable.
Thus far we have concentrated our efforts on a single trait (growth), but we have a number of family lines which permit the improvement of several traits simultaneously. We plan to continue selecting for increased growth rate and combine these advances with other desirable traits such as high meat yield and irradication of the deleterious curl-back trait. This will yield a much improved commercial product.
Modifications to our existing protocols need to be trialed to see whether substantial gains in time and savings of funds are possible in the development of a long-term breeding strategy for broodstock improvement. We need to:

1. continue the breeding program through at least three more generations, in both the mass selection and family lines, by producing, where possible, improved lines every year rather than every two years as currently. Performance assessment will continue through to the second year.
2. develop a selection index which uses all information about genetic merit over several commercial traits. This is the sum of the commercial gains an individual can transmit weighted by commercial value.
3. monitor grow-out performance at one year of age and two years of age, to determine if crosses can be made at one year of age rather than two years. This would speed selective improvement. We need to assess whether performance at one year is a good indicator of performance at market size (currently ~2.5 years).

If the Joint Venture company (JVC) proposed to commercialise our work is not established, then we will need to:

4. work with industry to conduct trials of particular lines in both Tasmania and South Australia under full commercial conditions.
5. develop sophisticated long-term breeding plans which yield on-going performance improvements while avoiding the deleterious effects of inbreeding. These plans will be based on analysis of data collected during the project, and require a major commitment from both technical staff and geneticists.
FRDC funding is thus required to complete the development program and, if the JVC is not established, to conduct the commercialisation trials and development of breeding plans. If the JVC is established, then we would provide it with broodstock for the trials but would expect it to develop its own long-term breeding strategy with input from and collaboration with our technical staff and geneticists.

Objectives

1. Continued production of mass selection lines for growth rate and family lines for other industry-desired traits.
2. Creation of crossbred family lines to assess the feasibility of combining desirable traits from different families into a single line.
3. Development of a multi-trait selection index.
4. If the Joint Venture Company is not established by November 2000, we have the following additional objective: Assessment of the performance of chosen lines in full-scale commercial trials.
5. If the Joint Venture Company is not established by November 2000, we have the following additional objective: Development of a breeding plan for sustainable genetic improvement.
6. Development of a commercilisation strategy within 12 months of start.

Final report

ISBN: 1-921061-07-3
Author: Robert Ward
Final Report • 2005-12-15 • 1.68 MB
2000-206-DLD.pdf

Summary

The Pacific oyster breeding project initiated in FRDC 97/321 was continued. Both mass selection and family selection procedures were employed. The main trait of interest was growth rate, although shell shape and condition index were also recorded.

Families were monitored on five farms. Two were intertidal Tasmanian farms, one was a subtidal Tasmanian farm, and two were intertidal South Australian farms.

Growth rates among farms varied considerably, with the two South Australian farms generally producing higher growth rates than the three Tasmanian farms. However, rank performance of farms also varied from year to year, presumably due to environmental factors. Environmental variability from year to year makes inter-generational comparisons difficult, as any genetic gains may be confounded by environmental fluctuations. However, within any one generation, families generally performed with similar rank orders among farms, meaning that genotype by environment interactions were limited. That is, a good performing family at one farm usually also performed well at other farms.

There was a negative correlation between progeny numbers produced per family and weights at the end of nursery phase. This density dependent effect disappeared by the time oysters had reached two years of age.

Growth rates responded well to selection. The final generation of the project for which we have full data to the end of grow-out is generation four. In generation four, the mean of the mass selection lines and the mean of the family selection lines were both about 1.6x greater than the unselected commercial control line; while the three mass selection lines performed similarly, the fastest and slowest growing of the family selection lines had about 2.2x and 1.2x, respectively, the growth rate of the control line.

There was evidence in some but not all years of a negative correlation between growth rate and condition index. That is, the fastest growing families tended to have a lower condition index. However, condition index was estimated before animals reached market size, and there was some evidence that, at market size, differences in condition index might disappear. This needs further attention.

Attention was also paid to shape when selecting parents. In the fourth generation, virtually all oysters when individually measured showed acceptable shape. Indeed, using the ASI Shape Index, the mean shape scores of all selected families were lower than that of the control line, indicating superior shape for the selected families. There was some evidence that the heavier oysters were somewhat more elongate than lighter oysters, but the effect was very small.

There was also evidence from the fourth generation that the selected families showed less inter-individual variability for weight and condition index than the Control line; for shape variability there was little difference. Generally the selected lines gave more uniform product than the control line.

Full-scale commercial trials of some lines were undertaken. These were carried out to collect data from a much larger number of farms and also to expose these lines (and the project) to the wider community. Collecting reliable quantitative data from these lines proved impossible, but anecdotally these lines generally performed as well or better than control lines. These were necessarily early-generation lines and later lines would perform still better. Several lines have also been recently produced as standard commercial runs.

Heritability estimates indicated that additive genetic variance is present for most traits and that these could be exploited in any ongoing selective breeding program. Weight and length at both farms assessed (both Tasmanian) had high heritabilities, and at the better-sampled of these farms width and depth heritabilities were moderate to high. Overall there was no evidence for sire or dam (maternal) effects particularly in the parameter estimates from both farms. We observed very little evidence of genotype x environment interactions. 

Genetic gains for the multi-traits identified as economically important (weight, width index and depth index) were estimated under different market scenarios and different genetic selection strategies. High weight gains, predicted to be 28%, were still possible when applying sufficient selection pressure on width index and depth index to maintain current shape. The strategy that produced the best gain was family/within family selection.

Molecular genetic research included developing new microsatellite DNA loci and comparing levels of genetic variation in mass selection lines with those in natural populations. The later generations of mass selection lines were shown to have reduced numbers of microsatellite alleles while allozyme alleles had been maintained. It was considered that because the allozyme diversity had been maintained, the microsatellite allele loss was not a great concern at this time. Census broodstock numbers in the mass selection lines examined were greater than the biologically effective broodstock numbers. Broodstock numbers in mass selection lines need to be maintained at reasonable numbers (ideally around 40-50 per generation and with equal numbers of males and females). It was shown that microsatellite DNA genotyping of individual larvae was achievable.

The project and its predecessor FRDC 97/321 produced five generations of selectively bred oysters before the program was handed over to Australian Seafood Industries Pty Ltd (ASI). ASI was established by the Tasmanian and South Australian industries during the course of the project to ensure the continuation of the breeding program at the end of the project and to facilitate technological transfer to industry. 

Keywords: Pacific oyster, Crassostrea gigas,  growth rate, heritability, genetic selection,  selection index, microsatellites.

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