Effect of elevated CO2 and small boat noise on the kinematics of predator-prey interactions

McCormick, Mark I., Watson, Sue-Ann, Simpson, Stephen D., and Allan, Bridie J.M. (2018) Effect of elevated CO2 and small boat noise on the kinematics of predator-prey interactions. Proceedings of the Royal Society of London Series B, Biological Sciences, 285 (1875). 20172650.

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Oceans of the future are predicted to be more acidic and noisier, particularly along the productive coastal fringe. This study examined the independent and combined effects of short-term exposure to elevated CO2 and boat noise on the predator–prey interactions of a pair of common coral reef fishes (Pomacentrus wardi and its predator, Pseudochromis fuscus). Successful capture of prey by predators was the same regardless of whether the pairs had been exposed to ambient control conditions, the addition of either playback of boat noise, elevated CO2 (925 µatm) or both stressors simultaneously. The kinematics of the interaction were the same for all stressor combinations and differed from the controls. The effects of CO2 or boat noise were the same, suggesting that their effects were substitutive in this situation. Prey reduced their perception of threat under both stressors individually and when combined, and this coincided with reduced predator attack distances and attack speeds. The lack of an additive or multiplicative effect when both stressors co-occurred was notable given the different mechanisms involved in sensory disruptions and highlights the importance of determining the combined effects of key drivers to aid in predicting community dynamics under future environmental scenarios.

Item ID: 53531
Item Type: Article (Research - C1)
ISSN: 1471-2954
Keywords: anthropogenic noise, ocean acidification, escape response, predator-prey, coral reef fish
Copyright Information: © 2018 The Author(s). Published by the Royal Society. All rights reserved.
Funders: Australian Research Council Centre of Excellence for Coral Reef Studies (ARC CoE Coral Reef Studies), Australian Research Council (ARC), Natural Environment Research Council (NERC)
Projects and Grants: ARC CoE Coral Reef Studies EI140100117, ARC Discovery Grant, NERC Knowledge Exchange Fellowship NE/J500616/2
Research Data: https://doi.org/10.4225/28/5a1cd71b4ef8a
Date Deposited: 09 May 2018 07:49
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 50%
31 BIOLOGICAL SCIENCES > 3109 Zoology > 310901 Animal behaviour @ 50%
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