Predatory strategies and behaviours in cephalopods are altered by elevated CO2

Spady, Blake L., Munday, Philip L., and Watson, Sue-Ann (2018) Predatory strategies and behaviours in cephalopods are altered by elevated CO2. Global Change Biology, 24 (6). pp. 2585-2596.

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Abstract

There is increasing evidence that projected near‐future carbon dioxide (CO2) levels can alter predator avoidance behaviour in marine invertebrates, yet little is known about the possible effects on predatory behaviours. Here we tested the effects of elevated CO2 on the predatory behaviours of two ecologically distinct cephalopod species, the pygmy squid, Idiosepius pygmaeus, and the bigfin reef squid, Sepioteuthis lessoniana. Both species exhibited an increased latency to attack and altered body pattern choice during the attack sequence at elevated CO2. I. pygmaeus also exhibited a 20% decrease in predation rate, an increased striking distance, and reduced preference for attacking the posterior end of prey at elevated CO2. Elevated CO2 increased activity levels of S. lessoniana comparable to those previously shown in I. pygmaeus, which could adversely affect their energy budget and increase their potential to be preyed upon. The effects of elevated CO2 on predatory behaviours, predation strategies and activity levels of cephalopods reported here could have far‐reaching consequences in marine ecosystems due to the ecological importance of cephalopods in the marine food web.

Item ID: 56212
Item Type: Article (Research - C1)
ISSN: 1365-2486
Keywords: activity, cephalopod, ocean acidification, predator–prey interaction, predatory behaviour, squid
Copyright Information: Copyright © 2018 John Wiley & Sons Ltd.
Funders: ARC Centre of Excellence for Coral Reef Studies
Projects and Grants: PADI Foundation Grant Number: 21445
Research Data: http://doi.org/10.4225/28/5aa74ecb58f42
Date Deposited: 27 Nov 2018 02:47
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 40%
06 BIOLOGICAL SCIENCES > 0699 Other Biological Sciences > 069902 Global Change Biology @ 30%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 30%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 40%
96 ENVIRONMENT > 9603 Climate and Climate Change > 960399 Climate and Climate Change not elsewhere classified @ 60%
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