Distribution of Ostreid herpesvirus-1 (OsHV-1) microvariant in seawater in a recirculating aquaculture system

Ostreid herpesvirus-1 (OsHV-1) microvariant presents a significant threat to the commercial production of Crassostrea gigas worldwide. Investigating the transmission of the virus in the estuarine environment where oysters are grown has proven to be difficult due to the complexity of the ecosystem. The aims of this trial were to (1) investigate the distribution of OsHV-1 … Continue reading Distribution of Ostreid herpesvirus-1 (OsHV-1) microvariant in seawater in a recirculating aquaculture system

The use of size and growing height to improve Crassostrea gigas farming and breeding techniques against OsHV-1

Mortality associated with ostreid herpesvirus 1 (OsHV-1) has significantly impacted Crassostrea gigas farmers all around the world. Although selective breeding programs to improve OsHV-1 resistance can significantly reduce the mortality rate below 20%, husbandry practices have also been one way to limit or decrease mortality. The main objectives of this study were to describe the … Continue reading The use of size and growing height to improve Crassostrea gigas farming and breeding techniques against OsHV-1

Bacteriophage therapy for the control of Vibrio harveyi in greenlip abalone (Haliotis laevigata)

Bacteriophage therapy has demonstrated promising results towards the control of bacterial infections within the aquaculture industry as an alternative therapy to antibiotics. This current research describes the efficacy of bacteriophage therapy in controlling vibriosis within abalone (Haliotis laevigata). Two bacteriophages were isolated and used in in vitro assays to determine the effect of each specific … Continue reading Bacteriophage therapy for the control of Vibrio harveyi in greenlip abalone (Haliotis laevigata)

Detection of Ostreid herpesvirus-1 microvariants in healthy Crassostrea gigas following disease events and their possible role as reservoirs of infection

Ostreid herpesvirus-1 microvariants (OsHV-1) cause severe mortalities in farmed Crassostrea gigas in Europe, New Zealand and Australia. Outbreaks are seasonal, recurring in the warmer months of the year in endemic estuaries. The reference genotype and microvariant genotypes of OsHV-1 have been previously detected in the tissues of apparently healthy adult oysters naturally exposed to OsHV-1 … Continue reading Detection of Ostreid herpesvirus-1 microvariants in healthy Crassostrea gigas following disease events and their possible role as reservoirs of infection

Flat oyster parasite found at Stewart Island

Cawthron Institute scientists are well-placed to respond to the discovery of Bonamia ostreae at oyster farms on Stewart Island. Bonamia ostreae is a parasite that poses substantial threat to flat oysters, and this afternoon the Ministry of Primary Industries (MPI) confirmed they have detected it at two Stewart Island farms. Cawthron Institute Aquaculture Group Manager, … Continue reading Flat oyster parasite found at Stewart Island

Mining and identification of SNP markers associated with growth traits in the clam Meretrix meretrix

Selecting fast-growing strains is the most common objective of genetic breeding programs. In this study, we sought to mine the growth-associated single nucleotide polymorphisms (SNPs) in the commercially cultured clam Meretrix meretrix by candidate gene association analysis. Fifty potentially growth-associated contigs based on their functional annotation were chosen as candidates from our EST database, and … Continue reading Mining and identification of SNP markers associated with growth traits in the clam Meretrix meretrix

Potential environmental drivers of a regional blue mussel mass mortality event (winter of 2014, Breton Sound, France)

In the context of global change, increasing mariculture production has raised particular concerns regarding its environmental impact and sustainability. Molluscs and particularly blue mussel account for a significant part of this total production. Although blue mussels are considered to be pretty resilient to environmental disturbances, we report in this study an unprecedented mussel mortality event … Continue reading Potential environmental drivers of a regional blue mussel mass mortality event (winter of 2014, Breton Sound, France)