Spat oysters3/23/2023 Intertidal oysters are daily exposed to rapid changes in the food supply, oxygen, salinity, pH, and temperature conditions, throughout the tidal cycle depending on their bathymetric level (Li et al., 2018 Scanes et al., 2017 Zhang et al., 2012, 2016). gigas constitutes a great model species able to support rapid and dynamic environmental changes. gigas) is a sessile estuarine bivalve living in the coastal zone. ![]() The Pacific oyster Crassostrea gigas ( C. This study opens new perspectives on oyster farming for mitigation strategies based on tidal height. Our work highlights that intertidal harsh environmental conditions modify host-pathogen interaction and improve oyster health. ![]() 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. 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. Depending on the bathymetry, oysters face oxygen deprivation, lack of nutrients, and high changes in temperature during alternation of the cycles of emersion/immersion. The Pacific oyster Crassostrea gigas is established in the marine intertidal zone, experiencing rapid and highly dynamic environmental changes throughout the tidal cycle.
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