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

Parker, LM, O'Connor, WA, Byrne, M, Dove, M, Coleman, RA, Portner, H-O, Scanes, E, Virtue, P ORCID: 0000-0002-9870-1256, Gibbs, M and Ross, PM 2018 , 'Ocean acidification but not warming alters sex determination in the Sydney rock oyster, Saccostrea glomerata' , Proceedings of the Royal Society of London. Biological Sciences, vol. 285, no. 1872 , pp. 1-9 , doi: 10.1098/rspb.2017.2869.

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Abstract

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 Type: Article
Authors/Creators: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
Keywords: ocean acidification, CO2, Sydney rock oyster, lipids, ocean warming, sex determination, gender
Journal or Publication Title: Proceedings of the Royal Society of London. Biological Sciences
Publisher: Royal Soc London
ISSN: 0962-8452
DOI / ID Number: 10.1098/rspb.2017.2869
Copyright Information:

Copyright 2018 the authors.

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