Coral Reefs

, Volume 35, Issue 2, pp 485–493 | Cite as

Contrasting effects of ocean acidification on reproduction in reef fishes

  • Megan J. WelchEmail author
  • Philip L. Munday


Differences in the sensitivity of marine species to ocean acidification will influence the structure of marine communities in the future. Reproduction is critical for individual and population success, yet is energetically expensive and could be adversely affected by rising CO2 levels in the ocean. We investigated the effects of projected future CO2 levels on reproductive output of two species of coral reef damselfish, Amphiprion percula and Acanthochromis polyacanthus. Adult breeding pairs were maintained at current-day control (446 μatm), moderate (652 μatm) or high CO2 (912 μatm) for a 9-month period that included the summer breeding season. The elevated CO2 treatments were consistent with CO2 levels projected by 2100 under moderate (RCP6) and high (RCP8) emission scenarios. Reproductive output increased in A. percula, with 45–75 % more egg clutches produced and a 47–56 % increase in the number of eggs per clutch in the two elevated CO2 treatments. In contrast, reproductive output decreased at high CO2 in Ac. polyacanthus, with approximately one-third as many clutches produced compared with controls. Egg survival was not affected by CO2 for A. percula, but was greater in elevated CO2 for Ac. polyacanthus. Hatching success was also greater for Ac. polyacanthus at elevated CO2, but there was no effect of CO2 treatments on offspring size. Despite the variation in reproductive output, body condition of adults did not differ between control and CO2 treatments in either species. Our results demonstrate different effects of high CO2 on fish reproduction, even among species within the same family. A greater understanding of the variation in effects of ocean acidification on reproductive performance is required to predict the consequences for future populations of marine organisms.


Amphiprion Acanthochromis Ocean acidification Coral reef fish Reproduction 



We thank Ben Lawes, Simon Wever and Andrew Thompson for their support with the aquarium systems. Special thanks to Sue-Ann Watson, Jennifer Donelson and Gabrielle Miller for assistance with breeding designs. Funding for this project was provided by the ARC Centre of Excellence for Coral Reef Studies (PLM) and the College of Marine and Environmental Sciences at James Cook University (MJW).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.ARC Centre of Excellence for Coral Reef StudiesJames Cook UniversityTownsvilleAustralia
  2. 2.College of Marine and Environmental SciencesJames Cook UniversityTownsvilleAustralia

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