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Diel CO2 cycles reduce severity of behavioural abnormalities in coral reef fish under ocean acidification

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dc.contributor Australian Institute Of Marine Science
dc.contributor Coll Sci & Engn
dc.contributor Australian Inst Marine Sci
dc.contributor Natl Sea Simulator
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor James Cook Univ
dc.contributor James Cook University MUNDAY, PHILIP L. JARROLD, MICHAEL D. HUMPHREY, CRAIG MCCORMICK, MARK I. 2017-09-24T18:23:38Z 2017-09-24T18:23:38Z 2019-05-09T01:02:38Z 2017-09-24T18:23:38Z 2017-09-24T18:23:38Z 2019-05-09T01:02:38Z 2017-08-31
dc.identifier.citation Jarrold MD, Humphrey C, McCormick MI, Munday PL (2017) Diel CO2 cycles reduce severity of behavioural abnormalities in coral reef fish under ocean acidification. Scientific Reports 7: 10153
dc.identifier.issn 2045-2322
dc.description.abstract Elevated CO2 levels associated with ocean acidification (OA) have been shown to alter behavioural responses in coral reef fishes. However, all studies to date have used stable pCO(2) treatments, not considering the substantial diel pCO(2) variation that occurs in shallow reef habitats. Here, we reared juvenile damselfish, Acanthochromis polyacanthus, and clownfish, Amphiprion percula, at stable and diel cycling pCO(2) treatments in two experiments. As expected, absolute lateralization of A. polyacanthus and response to predator cue of Am. percula were negatively affected in fish reared at stable, elevated pCO(2) in both experiments. However, diel pCO(2) fluctuations reduced the negative effects of OA on behaviour. Importantly, in experiment two, behavioural abnormalities that were present in fish reared at stable 750 mu atm CO2 were largely absent in fish reared at 750 +/- 300 mu atm CO2. Overall, we show that diel pCO(2) cycles can substantially reduce the severity of behavioural abnormalities caused by elevated CO2. Thus, past studies may have over-estimated the impacts of OA on the behavioural performance of coral reef fishes. Furthermore, our results suggest that diel pCO(2) cycles will delay the onset of behavioural abnormalities in natural populations.
dc.description.sponsorship We thank Ben Lawes, Simon Wever and Andrew Thompson for their support with the aquarium systems at JCU. We also thank the SeaSim team for their technical support throughout the experiment at AIMS. Thanks to Prof Goran Nilsson for helpful discussions and feedback on fish neurophysiology. Finally, we thank Rhondda Jones for statistical support. This project was funded by the Australian Research Council and an ARC Future Fellowship (PLM) and a small research grant from the Fisheries Society of the British Isles (MDJ).
dc.language English
dc.subject Great-barrier-reef
dc.subject Atlantic Salmon
dc.subject Responses
dc.subject Science & Technology - Other Topics
dc.subject Impacts
dc.subject Elevated Co2
dc.subject Seawater Carbonate Chemistry
dc.subject Calcification
dc.subject Multidisciplinary Sciences
dc.subject Performance
dc.subject Dioxide
dc.subject Ph
dc.title Diel CO2 cycles reduce severity of behavioural abnormalities in coral reef fish under ocean acidification
dc.type journal article
dc.identifier.doi 10.1038/s41598-017-10378-y
dc.identifier.wos WOS:000408781200012

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