Seawater carbonate chemistry and effects of ocean acidification and wariming on life-history traits of the Pacific oyster Crassostrea gigas

• Main Authors: Di Poi, Carole, Brodu, Nicolas, Gazeau, Frédéric, Pernet, Fabrice
• Format: Dataset
• Language: English
• Published: PANGAEA
• Subjects: 5-hydroxyindoleacetic acid; 5-hydroxyindoleacetic acid/5-hydroxytryptamine ratio; 5-hydroxytryptamine; Acceleration; Alkalinity; total; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-5,8,11,14-Eicosatetraenoic acid of total fatty acids; Angle; Angular velocity; Animalia; Aragonite saturation state; Behaviour; Benthic animals; Benthos; Bicarbonate ion; Birefringence; greyscale score; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon; inorganic; dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Crassostrea gigas; Date; Distance; Dopamine; Fatty acid content; Fatty acids; unsaturation index; Figure; Frequency; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); gamma-Aminobutyric acid; Glutamate; Gonad area; Growth/Morphology; Hatching rate; Identification; Ingestion rate; Laboratory experiment; Pacific; Ocean acidification; Pacific oyster
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.955703; https://doi.org/10.1594/PANGAEA.955703

Ocean acidification and warming (OAW) are pressing contemporary issues affecting marine life and specifically calcifying organisms. Here, we investigated the direct effects of OAW on life-history traits of the Pacific oyster Crassostrea gigas, the most cultivated bivalve species worldwide. We also tested whether parental conditioning history shaped the phenotypic characters of their progenies (intergenerational carryover effects). Adult oysters and their offspring were exposed to two temperatures (18°C, +3°C) under ambient pH conditions or under an end-of-century acidification scenario (−0.33 pH unit). In adults, we monitored standard biometric and reproductive parameters, stress response by quantifying neuroendocrine metabolites and gamete quality. In larvae, we measured hatching rate, size, biochemical quality, and behavior. We found that reducing pH reduced growth rate and activated the serotonin system, but increasing temperature attenuated these effects. There was no effect of pH on reproduction at either temperature, and no intergenerational carryover effects. Larval characteristics were similar between treatments, regardless of parental conditioning history. Thus, the Pacific oyster seems robust to changes in pH, and increasing temperature is not an aggravating factor. We emphasize that the use of neuroendocrine indicators holds promise for revealing sublethal impacts of environmental changes.