Predatory strategies and behaviours in cephalopods are altered by elevated CO2
This dataset is available as a spreadsheet in MS Excel (.xlsx) and Open Document formats (.ods) Abstract [Related Publication]: There is increasing evidence that projected near-future carbon dioxide (CO₂) levels can alter predator avoidance behaviour in marine invertebrates, yet little is known abou...
| Other Authors: | , , , , , |
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| Format: | Dataset |
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James Cook University
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| Online Access: | https://researchdata.edu.au/predatory-strategies-behaviours-elevated-co2/1326301 https://researchdata.jcu.edu.au//published/d0d6b9733b48f910e38cb28bb800e1a3 https://doi.org/10.4225/28/5aa74ecb58f42 |
| Summary: | This dataset is available as a spreadsheet in MS Excel (.xlsx) and Open Document formats (.ods) Abstract [Related Publication]: 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. Methodology Overview: Here, we tested the effects of current-day control (438µatm) and two projected near-future CO₂ levels (737 and 934µatm) on the predatory interactions of pygmy squid with a common prey item, the glass shrimp, Acetes sibogae australis (Jackson, 1992). The CO₂ treatments were selected to match projected CO₂ levels in the atmosphere and ocean by the end of this century for a moderate and high emissions trajectory based on representative concentration pathways (RCP) 6.0 and 8.5 respectively (Collins et al., 2013). We exposed bigfin reef squid to current-day control (435µatm) and projected future CO₂ levels (935µatm) following RCP8.5 (Collins et al., 2013), and tested their predatory interactions ... |
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