English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Vibrio  species have been associated with recurrent mass mortalities of juvenile oysters  Crassostrea gigas  threatening oyster farming worldwide. However, knowledge of the ecology of pathogens in affected oyster farming areas remains scarce. Specifically, there are no data regarding (i) the environmental reservoirs of  Vibrio  populations pathogenic to oysters, (ii) the environmental factors favoring their transmission, and (iii) the influence of oyster farming on the persistence of those pathogens. This knowledge gap limits our capacity to predict and mitigate disease occurrence. To address these issues, we monitored  Vibrio  species potentially pathogenic to  C. gigas  in 2013 and 2014 in the Thau Lagoon, a major oyster farming region in the coastal French Mediterranean. Sampling stations were chosen inside and outside oyster farms. Abundance and composition of phyto-, microzoo-, and mesozooplankton communities were measured monthly. The spatial and temporal dynamics of plankton and  Vibrio  species were compared, and positive correlations between plankton species and vibrios were verified by qPCR on isolated specimens of plankton.  Vibrio crassostreae  was present in the water column over both years, whereas  Vibrio tasmaniensis  was mostly found in 2013 and  Vibrio aestuarianus  was never detected. Moreover,  V. tasmaniensis  and  V. crassostreae  were found both as free-living or plankton-attached vibrios 1 month after spring mortalities of the oyster juveniles. Overall,  V. crassostreae  was associated with temperature and plankton composition, whereas  V. tasmaniensis  correlated with plankton composition only. The abundance of  Vibrio  species in the water column was similar inside and outside oyster farms, suggesting important spatial dispersion of pathogens in surrounding areas. Remarkably, a major increase in  V. tasmaniensis  and  V. crassostreae  was measured in the sediment of oyster farms during cold months. Thus, a winter reservoir of pathogenic vibrios could contribute to their ecology in this Mediterranean shellfish farming ecosystem.

Oyster Farming, Temperature, and Plankton Influence the Dynamics of Pathogenic Vibrios in the Thau Lagoon