Elevated CO2 affects anxiety but not a range of other behaviours in juvenile yellowtail kingfish

Jarrold, Michael D., Welch, Megan J., McMahon, Shannon J., McArley, Tristan, Allan, Bridie J.M., Watson, Sue-Ann, Parsons, Darren M., Pether, Stephen M.J., Pope, Stephen, Nicol, Simon, Smith, Neville, Herbert, Neill, and Munday, Philip L. (2020) Elevated CO2 affects anxiety but not a range of other behaviours in juvenile yellowtail kingfish. Marine Environmental Research, 157. 104863.

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Elevated seawater CO2 can cause a range of behavioural impairments in marine fishes. However, most studies to date have been conducted on small benthic species and very little is known about how higher oceanic CO2 levels could affect the behaviour of large pelagic species. Here, we tested the effects of elevated CO2, and where possible the interacting effects of high temperature, on a range of ecologically important behaviours (anxiety, routine activity, behavioural lateralization and visual acuity) in juvenile yellowtail kingfish, Seriola lalandi. Kingfish were reared from the egg stage to 25 days post-hatch in a full factorial design of ambient and elevated CO2 (similar to 500 and similar to 1000 mu atm pCO(2)) and temperature (21 degrees C and 25 degrees C). The effects of elevated CO2 were trait-specific with anxiety the only behaviour significantly affected. Juvenile S. lalandi reared at elevated CO2 spent more time in the dark zone during a standard black-white test, which is indicative of increased anxiety. Exposure to high temperature had no significant effect on any of the behaviours tested. Overall, our results suggest that juvenile S. lalandi are largely behaviourally tolerant to future ocean acidification and warming. Given the ecological and economic importance of large pelagic fish species more studies investigating the effect of future climate change are urgently needed.

Item ID: 63207
Item Type: Article (Research - C1)
ISSN: 1879-0291
Keywords: Anxiety, Behavioural lateralization, Vision, Temperature, Ocean acidification, Climate change, Seriola lalandi
Copyright Information: © 2019 Elsevier Ltd. All rights reserved.
Funders: South Pacific Regional Environment Programme (SPREP), Pacific Community (SPC), Government of New Zealand and the Principality of Monaco (PIOAP), Australian Research Council (ARC), ARC Centre of Excellence for Coral Reef Studies, National Institute of Water and Atmospheric Research (NIWA)
Projects and Grants: PIOAP Pacific Islands Ocean Acidification Partnership, ARC Grant FT130100505
Research Data: https://doi.org/10.25903/5df17da5f534f, https://doi.org/10.1594/pangaea.911496
Date Deposited: 20 May 2020 07:43
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 100%
SEO Codes: 19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1901 Adaptation to climate change > 190102 Ecosystem adaptation to climate change @ 100%
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