Harsh intertidal environment enhances metabolism and immunity in oyster (Crassostrea gigas) spat

The Pacific oyster Crassostrea gigas is established in the marine intertidal zone, experiencing rapid and highly dynamic environmental changes throughout the tidal cycle. Depending on the bathymetry, oysters face oxygen deprivation, lack of nutrients, and high changes in temperature during alternation of the cycles of emersion/immersion. Here we showed that intertidal oysters at a bathymetry level of 3 and 5 m delayed by ten days the onset of mortality associated with Pacific Oyster Mortality Syndrome (POMS) as compared to subtidal oysters. Intertidal oysters presented a lower growth but similar energetic reserves to subtidal oysters but induced proteomic changes indicative of a boost in metabolism, inflammation, and innate immunity that may have improved their resistance during infection with the Ostreid herpes virus. Our work highlights that intertidal harsh environmental conditions modify host-pathogen interaction and improve oyster health. This study opens new perspectives on oyster farming for mitigation strategies based on tidal height.


Environment, Marine invertebrate, Metabolism, OsHV-1

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Corporeau Charlotte, Petton Sébastien, Vilaça Romain, Delisle Lizenn, Quéré Claudie, Le Roy Valerian, Dubreuil Christine, Lacas-Gervais Sandra, Guitton Yann, Artigaud Sebastien, Bernay Benoît, Pichereau Vianney, Huvet Arnaud, Petton Bruno, Pernet Fabrice, Fleury Elodie, Madec Stephanie, Brigaudeau Christophe, Brenner Catherine, Mazure Nathalie M. (2022). Harsh intertidal environment enhances metabolism and immunity in oyster (Crassostrea gigas) spat. Marine Environmental Research. 180. 105709 (14p.). https://doi.org/10.1016/j.marenvres.2022.105709, https://archimer.ifremer.fr/doc/00787/89883/

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