Publications by authors named "D Cheslett"
Crustaceans are a valuable resource globally, both ecologically and economically, and investigations into their health are becoming increasingly important as exploitation rises. The microbiome plays a crucial role in crustacean immunity, and understanding its composition and structure can provide insights into the health of an organism and its interactions with various factors. In this study, we investigated the hepatopancreas microbiome of the velvet swimming crab, Necora puber, and compared its composition and structure with several study factors, including two different sampling points and infection with a paramyxid parasite, Paramarteilia canceri.
View Article and Find Full Text PDFSustainable management of crustacean populations requires an understanding of the range of factors affecting different crustacean species. Recently, a high prevalence of a paramyxid parasite, Paramarteilia canceri, was reported in velvet crabs Necora puber in Ireland. Similar parasites have been known to cause mass mortalities in bivalves and, as velvet crabs are an important commercial species, these parasite infections are cause for concern.
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- Bacteria from a specific family are linked to mass mortality events in farmed Pacific oysters in various countries, significantly affecting the industry.
- In Ireland, certain bacteria are noted for causing serious summer outbreaks, with one pathogen emerging as the primary concern.
- Research involved sequencing 43 bacterial isolates from oyster mortality cases, revealing two major clades that are likely spreading between Ireland and France, highlighting a risk to Pacific oyster production in Europe.
Article Synopsis
- * The pathogen's impact on oyster aquaculture in Europe worsened after its re-emergence in 2012, prompting a study on mollusc diseases across European national labs.
- * Through genomic analysis of 54 Vibrio aestuarianus strains, researchers discovered that the pathogenic subspecies has a distinct epidemic structure and identified a genetic island that provides copper resistance, aiding its adaptation and persistence in oyster populations.
The velvet swimming crab Necora puber has been fished in Ireland since the early 1980s and contributes significant income to smaller fishing vessels. From 2016 onwards, reduced landings have been reported. We undertook a full pathological investigation of crabs from fishing grounds at 3 sites on the west (Galway), southwest (Castletownbere) and east (Howth) coasts of Ireland.
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