media release
For immediate use
Latest research delivers encouraging signs for oyster industry ahead of AGM
A collaborative research programme to breed oysters resilient to a virus that three years ago devastated New Zealand’s
Pacific oyster industry is starting to deliver promising results.
Scientists at Cawthron Institute, together with industry partners, have been working towards breeding Pacific oysters
resilient to the ostreid herpes (OsHV-1) virus that almost wiped out the country’s Pacific oyster stocks in 2010.
Cawthron Institute has today reported promising results from the latest research trials which it will present at the New
Zealand Oyster Industry Association AGM this weekend (6 July).
“We have identified oyster families with a very high survival rate when exposed to the oyster virus, which decimated
stocks in 2010,” Cawthron Institute Chief Executive Charles Eason says. “These recent findings are most encouraging.
They suggest that selective breeding has great potential to address the current crisis.”
Professor Eason says while the latest results are encouraging, there is still a lot more work to be done.
“There are still further trials to go,” Professor Eason says. “These are very encouraging preliminary results for our
long-term breeding programme, highlighting that through a combination of improved genetics and husbandry, promising
outcomes may be achieved in a very short time frame.”
Cawthron Institute scientists have been researching the resilience of Pacific oysters to the virus since 2010 when it
first hit New Zealand. The virus caused 90 percent losses in the wild caught spat the industry heavily relied on for its
marine farm stocks. The crisis led to job losses, factory closures and saw an overall drop in production of 50 to 60
percent, with some individual farmers hit significantly harder.
When the virus hit, Cawthron Institute was already involved in a joint research project with industry partners into
breeding of oyster spat.
“When the virus hit we all worked together to address this problem,” says Cawthron Institute Cultured Shellfish
Programme Leader Nick King. “We could not have got this far without the
huge support we have received from our industry partners, in particular Pacific Marine Farms - a subsidiary of Aotearoa
Fisheries Limited, and Te Matuku Bay Oysters, who managed the bulk of the on-farm trials. It is truly a joint effort.”
Cawthron Institute Aquaculture Manager Dr Jacquie Reed says the research and farm trials indicate that a combination of
genetic improvement through breeding, and improved farm husbandry - such as by growing oysters to a larger size and age
before exposure to the virus, makes a big difference in terms of oyster survivorship and a return to viable production.
“We’re hoping these new breeding strategies will help us achieve genetic gains in a relatively short time frame,” Dr
Reed says. “We are fully aware that timing is critical in times of crisis, and the industry needs fast results to
survive.”
ENDS