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Ocean acidification but not warming alters sex determination in the Sydney rock oyster, Saccostrea glomerata


Parker, LM and O'Connor, WA and Byrne, M and Dove, M and Coleman, RA and Portner, H-O and Scanes, E and Virtue, P and Gibbs, M and Ross, PM, Ocean acidification but not warming alters sex determination in the Sydney rock oyster, Saccostrea glomerata, Proceedings of the Royal Society of London. Biological Sciences, 285, (1872) Article 20172869. ISSN 0962-8452 (2018) [Refereed Article]

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Copyright 2018 the authors.

DOI: doi:10.1098/rspb.2017.2869


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.

Item Details

Item Type:Refereed Article
Keywords:ocean acidification, CO2, Sydney rock oyster, lipids, ocean warming, sex determination, gender
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Biodiversity in Antarctic and Southern Ocean environments
UTAS Author:Virtue, P (Associate Professor Patti Virtue)
ID Code:124296
Year Published:2018
Web of Science® Times Cited:22
Deposited By:Ecology and Biodiversity
Deposited On:2018-02-16
Last Modified:2018-11-21

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