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Ocean acidification does not impair the behaviour of coral reef fishes
Deakin Univ, Sch Life & Environm Sci, Geelong, Vic, Australia.
Univ Windsor, Great Lakes Inst Environm Res, Windsor, ON, Canada.
Carleton Univ, Dept Biol, Ottawa, ON, Canada;Univ Neuchatel, Inst Biol, Ecoethol, Neuchatel, Switzerland;Univ Montreal, Dept Sci Biol, Montreal, PQ, Canada.
Univ Neuchatel, Inst Biol, Ecoethol, Neuchatel, Switzerland;Univ Montreal, Dept Sci Biol, Montreal, PQ, Canada.
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2020 (English)In: Nature, ISSN 0028-0836, E-ISSN 1476-4687, Vol. 577, no 7790, p. 370-+Article in journal (Refereed) Published
Abstract [en]

The partial pressure of CO2 in the oceans has increased rapidly over the past century, driving ocean acidification and raising concern for the stability of marine ecosystems(1-3). Coral reef fishes are predicted to be especially susceptible to end-of-century ocean acidification on the basis of several high-profile papers(4,5) that have reported profound behavioural and sensory impairments-for example, complete attraction to the chemical cues of predators under conditions of ocean acidification. Here, we comprehensively and transparently show that-in contrast to previous studies-end-of-century ocean acidification levels have negligible effects on important behaviours of coral reef fishes, such as the avoidance of chemical cues from predators, fish activity levels and behavioural lateralization (left-right turning preference). Using data simulations, we additionally show that the large effect sizes and small within-group variances that have been reported in several previous studies are highly improbable. Together, our findings indicate that the reported effects of ocean acidification on the behaviour of coral reef fishes are not reproducible, suggesting that behavioural perturbations will not be a major consequence for coral reef fishes in high CO2 oceans.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2020. Vol. 577, no 7790, p. 370-+
National Category
Ecology
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URN: urn:nbn:se:uu:diva-406469DOI: 10.1038/s41586-019-1903-yISI: 000509570100033PubMedID: 31915382OAI: oai:DiVA.org:uu-406469DiVA, id: diva2:1413038
Funder
Swedish Research Council Formas, 2013-947Swedish Research Council Formas, 2009-596Swedish Research Council, 621-2012-4679Magnus Bergvall Foundation, 2014-00620Lars Hierta Memorial Foundation, FO2014-0659Available from: 2020-03-09 Created: 2020-03-09 Last updated: 2020-03-09Bibliographically approved

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