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

Corporeau, Charlotte; Petton, Sébastien; Vilaça, Romain; Delisle, Lizenn; Quéré, Claudie; Roy, Valérian Le; Dubreuil, Christine; Lacas‐Gervais, Sandra; Guitton, Yann; Artigaud, Sébastien; Bernay, Benoı̂t; Pichereau, Vianney; Huvet, Arnaud; Petton, Bruno; Fleury, Elodie; Madec, Stéphanie; Brigaudeau, Christophe; Brenner, Christiane; Mazure, Nathalie M.

doi:10.1016/j.marenvres.2022.105709

Cited by 6 publications

(2 citation statements)

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“…In the present study, laboratory-challenge experiments demonstrated increased survival time and reduced mortality in intertidally-cultured oysters (Year 1: Intertidal, Year 2: Intertidal→Deep) as compared to deep-water-cultured oysters, which was paralleled under field settings at one farm site (DB). Corporeau et al (2022) also reported a substantial (>1 week) delay in mortality in intertidal Pacific oysters compared with subtidal counterparts during a summer mortality event. Likewise, intertidal Pacific oysters have shown improved survival over subtidal equivalents during emersion stress (Meng et al, 2018).…”

Section: Discussionmentioning

confidence: 91%

“…For example, intertidally-cultured animals have been observed to develop thicker shells and larger adductor muscles than their subtidal counterparts (Lewis and Seed, 1969;Hickman and Illlingworth, 1980;Tagliarolo et al, 2012), which may support improved resilience to temperature and pathogen stressors. Likewise, the intertidal environment may modify host-pathogen interactions via promotion of microbiomes, metabolism, inflammation, and innate immunity that collectively grant improved resistance to pathogen infections (King et al, 2019;Offret et al, 2020;Corporeau et al, 2022). Intertidal oysters may also fare better under stressor conditions due to an improved ability to enact larger energy metabolism depressions and earlier anaerobic glycolysis responses (Meng et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

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Development of a nature-based solution for mitigation of Pacific oyster summer mortality: use of the intertidal zone to improve resilience to environmental stressors

Mackenzie,

Raap,

Leduc

et al. 2024

Front. Mar. Sci.

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In recent years, Pacific oyster growers in British Columbia (BC), Canada have experienced devastating losses due to summer mortality syndrome. While anecdotal evidence suggests that intertidally-grown oysters may fare better during mass mortality events than deep-water counterparts, there remains a lack of research examining how different culture conditions may influence severity. To address this, we compared growth, condition, histopathology, reproductive status, and survival between intertidally- and deep-water-cultured oysters over 2 years at three oyster farms in Baynes Sound (BC). A reciprocal transplant was carried out after 1 year to test the use of the intertidal as a mechanism for promotion of physiological resilience prior to deep-water deployment. Field trial results showed significantly higher final survival in oysters transferred from the intertidal to deep water (83.5%) compared to those maintained in deep water (63.6%), but only at one farm, likely as a consequence of varying physical and/or biological characteristics associated with particular farm locations. Histopathology showed little role of disease with regards to varying survival among treatments, though higher occurrence of Viral Gametocytic Hypertrophy was observed in Year 1 oysters under deep-water (62.2%) versus intertidal (37.8%) conditions. Additionally, after 2 years, there was no significant difference in oyster size nor condition index between oysters transplanted from the intertidal to deep water and those solely cultured in deep water. A laboratory-challenge experiment determined significantly different survival curves of Year 1 intertidally- and deep-water-cultured oysters under immersion/emersion and warming conditions, with final survival of 88% and 64%, respectively, under conditions of high temperature (25°C) and immersion. Likewise, Year 2 (i.e. post-transfer) intertidally- and deep-water-cultured oysters showed significantly different survival curves under laboratory-based Vibrio challenge conditions (16°C) with final survival of 63% and 34%, respectively. Results suggest that partial culture in the intertidal at some farms may be an effective method for conferring resilience to summer mortality in Pacific oysters.

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Section: Discussionmentioning

confidence: 91%