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Behavioural stress feedback loops in benthic invertebrates caused by pH drop-induced metabolites

View ORCID ProfileLauric Feugere, Lauren Angell, James Fagents, Rebecca Nightingale, Kirsty Rowland, Saffiyah Skinner, Jorg Hardege, Helga Bartels-Hardege, View ORCID ProfileKatharina C. Wollenberg Valero
doi: https://doi.org/10.1101/2021.04.16.440165
Lauric Feugere
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Lauren Angell
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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James Fagents
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Rebecca Nightingale
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Kirsty Rowland
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Saffiyah Skinner
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Jorg Hardege
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Helga Bartels-Hardege
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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Katharina C. Wollenberg Valero
1Department of Biological and Marine Sciences, University of Hull, Cottingham Road, Kingston-upon-Hull HU67RX, United Kingdom
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  • ORCID record for Katharina C. Wollenberg Valero
  • For correspondence: k.wollenberg-valero@hull.ac.uk
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Abstract

Studies on pH stress in marine animals typically focus on direct or species-specific aspects. We here test the hypothesis that a drop to pH = 7.6 indirectly affects the intra- and interspecific interactions of benthic invertebrates by means of chemical communication. We recorded fitness-relevant behaviours of small hermit crabs Diogenes pugilator, green shore crabs Carcinus maenas, and harbour ragworms Hediste diversicolor in response to short-term pH drop, and to putative stress metabolites released by conspecifics or gilt-head sea bream Sparus aurata during 30 minutes of acute pH drop. Not only did acute pH drop itself impair time to find a food cue in small hermit crabs and burrowing in harbour ragworms, but similar effects were observed under exposure to pH drop-induced stress metabolites. Stress metabolites from S. aurata, but not its regular control metabolites, also induced avoidance responses in all recipient species. Here, we confirm that a short-term abrupt pH drop, an abiotic stressor, has the capacity to trigger the release of metabolites which induce behavioural responses in conspecific and heterospecific individuals, which can be interpreted as a behavioural cost. Our findings that stress responses can be indirectly propagated through means of chemical communication warrant further research to confirm the effect size of the behavioural impairments caused by stress metabolites and to characterise their chemical nature.

Competing Interest Statement

The authors have declared no competing interest.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted April 18, 2021.
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Behavioural stress feedback loops in benthic invertebrates caused by pH drop-induced metabolites
Lauric Feugere, Lauren Angell, James Fagents, Rebecca Nightingale, Kirsty Rowland, Saffiyah Skinner, Jorg Hardege, Helga Bartels-Hardege, Katharina C. Wollenberg Valero
bioRxiv 2021.04.16.440165; doi: https://doi.org/10.1101/2021.04.16.440165
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Behavioural stress feedback loops in benthic invertebrates caused by pH drop-induced metabolites
Lauric Feugere, Lauren Angell, James Fagents, Rebecca Nightingale, Kirsty Rowland, Saffiyah Skinner, Jorg Hardege, Helga Bartels-Hardege, Katharina C. Wollenberg Valero
bioRxiv 2021.04.16.440165; doi: https://doi.org/10.1101/2021.04.16.440165

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