Haplosporidia

Haplosporidian species (phylum Haplosporidia Caullery & Mesnil, 1899) are a small group of four genera of sometimes pathogenic protozoan parasites usually with uninucleated spores. They are widely distributed in marine and freshwater invertebrates, although their status in Africa, much of Eurasia and Central and South America, is largely unknown. They infect molluscs including commercially important … Continue reading Haplosporidia

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

Epipodial tentacle gene expression and predetermined resilience to summer mortality in the commercially important greenlip Abalone, Haliotis laevigata

“Summer mortality” is a phenomenon that occurs during warm water temperature spikes that results in the mass mortality of many ecologically and economically important mollusks such as abalone. This study aimed to determine whether the baseline gene expression of abalone before a laboratory-induced summer mortality event was associated with resilience to summer mortality. Tentacle transcriptomes … Continue reading Epipodial tentacle gene expression and predetermined resilience to summer mortality in the commercially important greenlip Abalone, Haliotis laevigata

Periwinkles and parasites: the occurrence and phenotypic effects of parasites in Littorina saxatilis and L. arcana in northeastern England

Littorina saxatilis is a common intertidal gastropod on shores of the North Atlantic, and an important study species for evolutionary investigations. Its congener L. arcana is much less widely distributed, but both species are common at Old Peak, Yorkshire, UK. The parasite profiles of L. saxatilis and L. arcana from this shore were determined histologically, … Continue reading Periwinkles and parasites: the occurrence and phenotypic effects of parasites in Littorina saxatilis and L. arcana in northeastern England

Haemocytes collected from experimentally infected Pacific oysters, Crassostrea gigas: Detection of ostreid herpesvirus 1 DNA, RNA, and proteins in relation with inhibition of apoptosis

Recent transcriptomic approaches focused on anti-viral immunity in molluscs lead to the assumption that the innate immune system, such as apoptosis, plays a crucial role against ostreid herpesvirus type 1 (OsHV-1), infecting Pacific cupped oyster, Crassostrea gigas. Apoptosis constitutes a major mechanism of anti-viral response by limiting viral spread and eliminating infected cells. In this … Continue reading Haemocytes collected from experimentally infected Pacific oysters, Crassostrea gigas: Detection of ostreid herpesvirus 1 DNA, RNA, and proteins in relation with inhibition of apoptosis

Transmission of Ostreid herpesvirus-1 microvariant in seawater: Detection of viral DNA in seawater, filter retentates, filter membranes and sentinel Crassostrea gigas spat in upwellers

To understand the transmission of Ostreid herpesvirus-1 microvariant(s) (OsHV-1) in seawater, it is necessary to understand the temporal pattern of occurrence of the virus in seawater in relation to demonstrated infection events in oysters. The aims of the current study were: (1) to investigate the temporal sequence of detection of OsHV-1 in seawater and Crassostrea … Continue reading Transmission of Ostreid herpesvirus-1 microvariant in seawater: Detection of viral DNA in seawater, filter retentates, filter membranes and sentinel Crassostrea gigas spat in upwellers

Seasonal dynamics and metagenomic characterization of marine viruses in Goseong Bay, Korea

Viruses are the most abundant biological entities in the oceans, and account for a significant amount of the genetic diversity of marine ecosystems. However, there is little detailed information about the biodiversity of viruses in marine environments. Rapid advances in metagenomics have enabled the identification of previously unknown marine viruses. We performed metagenomic profiling of … Continue reading Seasonal dynamics and metagenomic characterization of marine viruses in Goseong Bay, Korea