Behavioural responses of fish groups exposed to a predatory threat under elevated CO2

C. Cattano*, M. Fine, F. Quattrocchi, R. Holzman, M. Milazzo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Most of the studies dealing with the effects of ocean acidification (OA) on fish behaviour tested individuals in isolation, even when the examined species live in shoals in the wild. Here we evaluated the effects of elevated CO2 concentrations (i.e. ∼900 μatm) on the shelter use and group cohesion of the gregarious damselfish Chromis viridis using groups of sub-adults exposed to a predatory threat. Results showed that, under predatory threat, fish reared at elevated CO2 concentrations displayed a risky behaviour (i.e. decreased shelter use), whereas their group cohesion was unaffected. Our findings add on increasing evidence to account for social dynamics in OA experiments, as living in groups may compensate for CO2-induced risky behaviour.

Original languageAmerican English
Pages (from-to)179-184
Number of pages6
JournalMarine Environmental Research
Volume147
DOIs
StatePublished - May 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Coral reef fish
  • Global change
  • Group fish
  • Ocean acidification
  • Predation
  • Risk assessment
  • Shelter use

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