Mass mortalities of unknown aetiology in Pacific oysters Crassostrea gigas in Port Stephens, New South Wales, Australia

From January to June 2013 and November to January 2014, mass mortalities were reported in Pacific oysters Crassostrea gigas cultivated in Port Stephens estuary, New South Wales, Australia. In some cases, 100% mortality was reported in both triploid and diploid C. gigas, although native species of oyster cultivated in the same areas remained unaffected. Histological … Continue reading Mass mortalities of unknown aetiology in Pacific oysters Crassostrea gigas in Port Stephens, New South Wales, Australia

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Future CRC-P : advanced understanding of POMS to guide farm management decisions in Tasmania (project)

Pacific Oyster Mortality Syndrome (POMS) caused by the OsHV-1 virus was first detected in Tasmania in January 2016 with mass mortalities of cultured Pacific oysters on farms in several major oyster growing areas, including Pittwater, Pipeclay Lagoon, Blackman Bay and Little Swanport. Prior to this outbreak, Tasmanian oyster farms produced around four million dozen oysters … Continue reading Future CRC-P : advanced understanding of POMS to guide farm management decisions in Tasmania (project)

Risk factors for mortality during the first occurrence of Pacific Oyster Mortality Syndrome due to Ostreid herpesvirus – 1 in Tasmania, 2016

The microvariant genotype of Ostreid herpes virus 1 (OsHV-1 μVar) has caused repeated seasonal outbreaks of mass mortality in Pacific oyster (Crassostrea gigas) populations in Europe, New Zealand and in New South Wales, Australia. The first occurrence of OsHV-1 related mortality in Tasmania, Australia was in January 2016; mortality was documented and multivariable logistic regression analysis was undertaken … Continue reading Risk factors for mortality during the first occurrence of Pacific Oyster Mortality Syndrome due to Ostreid herpesvirus – 1 in Tasmania, 2016

A novel monoclonal Perkinsus chesapeaki in vitro isolate from an Australian cockle, Anadara trapezia

A monoclonal Perkinsus chesapeaki isolate was established from 1 of 10 infected Australian Anadara trapezia cockles. Morphological features were similar to those of described P. chesapeaki isolates, and also included a unique vermiform schizont cell-type. Perkinsus olseni-specific PCR primers amplified DNAs from all 10 cockles. Perkinsus chesapeaki-specific primers also amplified DNAs from 4/10 cockles, including … Continue reading A novel monoclonal Perkinsus chesapeaki in vitro isolate from an Australian cockle, Anadara trapezia

Australia develops genetic research against deadly oyster virus

A genetic improvement program to breed oysters genetically predisposed to resist Pacific oyster mortality syndrome (POMS) -- a disease that is harmless to humans but so lethal to oysters that it can kill more than 90% of a crop of millions of animals within days -- is being developed in Australia. (...) (By Undercurrent News May 04, … Continue reading Australia develops genetic research against deadly oyster virus

Detection of ostreid herpesvirus 1 microvariant DNA in aquatic invertebrate species, sediment and other samples collected from the Georges River estuary, New South Wales, Australia

Ostreid herpesvirus 1 microvariants (OsHV-1) present a serious threat to the Australian Crassostrea gigas industry. Of great concern is the propensity for mortality due to the virus recurring each season in farmed oysters. However, the source of the virus in recurrent outbreaks remains unclear. Reference strain ostreid herpesvirus 1 (OsHV-1 ref) and other related variants … Continue reading Detection of ostreid herpesvirus 1 microvariant DNA in aquatic invertebrate species, sediment and other samples collected from the Georges River estuary, New South Wales, Australia

POMS not a case of if, but when for South Australian oyster industry

Bruce Zippel is also an oyster grower at Smoky Bay on the far west coast of South Australia, and said the state had learnt a lot since POMS was found in Tasmania earlier this year. South Australia has so far remained POMS-free. Mr Zippel is urging South Australian growers to continue supporting genetic selection programs … Continue reading POMS not a case of if, but when for South Australian oyster industry