Seawater carbonate chemistry and sex determination in the Sydney rock oyster, Saccostrea glomerata


Whether sex determination of marine organisms can be altered by ocean acidification and warming during this century remains a significant, unanswered question. Here, we show that exposure of the protandric hermaphrodite oyster, Saccostrea glomerata to ocean acidification, but not warming, alters sex determination resulting in changes in sex ratios. After just one reproductive cycle there were 16% more females than males. The rate of gametogenesis, gonad area, fecundity, shell length, extracellular pH and survival decreased in response to ocean acidification. Warming as a sole stressor slightly increased the rate of gametogenesis, gonad area and fecundity, but this increase was masked by the impact of ocean acidification at a level predicted for this century. Alterations to sex determination, sex ratios and reproductive capacity will have flow on effects to reduce larval supply and population size of oysters and potentially other marine organisms.

In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2021) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2022-03-22.

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Metadata Access
Creator Parker, Laura M ORCID logo; O'Connor, Wayne A ORCID logo; Byrne, Maria ORCID logo; Dove, Michael; Coleman, Ross A ORCID logo; Pörtner, Hans-Otto ORCID logo; Scanes, Elliot ORCID logo; Virtue, Patti ORCID logo; Gibbs, Mitchell; Ross, Pauline M ORCID logo
Publisher PANGAEA
Contributor Yang, Yan
Publication Year 2018
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 10452 data points
Discipline Earth System Research