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Long-term exposure to elevated carbon dioxide does not alter activity levels of a coral reef fish in response to predator chemical cues


Sundin, J and Amcoff, M and Mateos-Gonzalez, F and Raby, GD and Jutfelt, F and Clark, TD, Long-term exposure to elevated carbon dioxide does not alter activity levels of a coral reef fish in response to predator chemical cues, Behavioral Ecology and Sociobiology, 71, (8) Article 108. ISSN 0340-5443 (2017) [Refereed Article]


Copyright Statement

Copyright 2017 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0)

DOI: doi:10.1007/s00265-017-2337-x


Levels of dissolved carbon dioxide (CO2) projected to occur in the world’s oceans in the near future have been reported to increase swimming activity and impair predator recognition in coral reef fishes. These behavioral alterations would be expected to have dramatic effects on survival and community dynamics in marine ecosystems in the future. To investigate the universality and replicability of these observations, we used juvenile spiny chromis damselfish (Acanthochromis polyacanthus) to examine the effects of long-term CO2 exposure on routine activity and the behavioral response to the chemical cues of a predator (Cephalopholis urodeta). Commencing at ∼3–20 days post-hatch, juvenile damselfish were exposed to present-day CO2 levels (∼420 μatm) or to levels forecasted for the year 2100 (∼1000 μatm) for 3 months of their development. Thereafter, we assessed routine activity before and after injections of seawater (sham injection, control) or seawater-containing predator chemical cues. There was no effect of CO2 treatment on routine activity levels before or after the injections. All fish decreased their swimming activity following the predator cue injection but not following the sham injection, regardless of CO2 treatment. Our results corroborate findings from a growing number of studies reporting limited or no behavioral responses of fishes to elevated CO2.

Item Details

Item Type:Refereed Article
Keywords:climate change, ocean acidification, Pomacentridae, olfaction, alarm cue
Research Division:Environmental Sciences
Research Group:Climate change impacts and adaptation
Research Field:Ecological impacts of climate change and ecological adaptation
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the environmental sciences
UTAS Author:Clark, TD (Dr Timothy Clark)
ID Code:125810
Year Published:2017
Web of Science® Times Cited:17
Deposited By:Fisheries and Aquaculture
Deposited On:2018-05-08
Last Modified:2018-07-30
Downloads:70 View Download Statistics

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