Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway
Abstract Crustacean olfaction is fundamental to most aspects of living and communicating in aquatic environments and more broadly, for individual‐ and population‐level success. Accelerated ocean acidification from elevated CO 2 threatens the ability of crabs to detect and respond to important olfact...
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crwiley:10.1111/gcb.16738 2024-06-23T07:55:50+00:00 Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway Durant, Andrea Khodikian, Elissa Porteus, Cosima S. Natural Sciences and Engineering Research Council of Canada 2023 http://dx.doi.org/10.1111/gcb.16738 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16738 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Global Change Biology volume 29, issue 14, page 4126-4139 ISSN 1354-1013 1365-2486 journal-article 2023 crwiley https://doi.org/10.1111/gcb.16738 2024-06-11T04:49:04Z Abstract Crustacean olfaction is fundamental to most aspects of living and communicating in aquatic environments and more broadly, for individual‐ and population‐level success. Accelerated ocean acidification from elevated CO 2 threatens the ability of crabs to detect and respond to important olfactory‐related cues. Here, we demonstrate that the ecologically and economically important Dungeness crab ( Metacarcinus magister ) exhibits reduced olfactory‐related antennular flicking responses to a food cue when exposed to near‐future CO 2 levels, adding to the growing body of evidence of impaired crab behaviour. Underlying this altered behaviour, we find that crabs have lower olfactory nerve sensitivities (twofold reduction in antennular nerve activity) in response to a food cue when exposed to elevated CO 2 . This suggests that near‐future CO 2 levels will impact the threshold of detection of food by crabs. We also show that lower olfactory nerve sensitivity in elevated CO 2 is accompanied by a decrease in the olfactory sensory neuron (OSN) expression of a principal chemosensory receptor protein, ionotropic receptor 25a (IR25a) which is fundamental for odorant coding and olfactory signalling cascades. The OSNs also exhibit morphological changes in the form of decreased surface areas of their somata. This study provides the first evidence of the effects of high CO 2 levels at multiple levels of biological organization in marine crabs, linking physiological and cellular changes with whole animal behavioural responses. Article in Journal/Newspaper Ocean acidification Wiley Online Library Global Change Biology 29 14 4126 4139 |
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English |
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Abstract Crustacean olfaction is fundamental to most aspects of living and communicating in aquatic environments and more broadly, for individual‐ and population‐level success. Accelerated ocean acidification from elevated CO 2 threatens the ability of crabs to detect and respond to important olfactory‐related cues. Here, we demonstrate that the ecologically and economically important Dungeness crab ( Metacarcinus magister ) exhibits reduced olfactory‐related antennular flicking responses to a food cue when exposed to near‐future CO 2 levels, adding to the growing body of evidence of impaired crab behaviour. Underlying this altered behaviour, we find that crabs have lower olfactory nerve sensitivities (twofold reduction in antennular nerve activity) in response to a food cue when exposed to elevated CO 2 . This suggests that near‐future CO 2 levels will impact the threshold of detection of food by crabs. We also show that lower olfactory nerve sensitivity in elevated CO 2 is accompanied by a decrease in the olfactory sensory neuron (OSN) expression of a principal chemosensory receptor protein, ionotropic receptor 25a (IR25a) which is fundamental for odorant coding and olfactory signalling cascades. The OSNs also exhibit morphological changes in the form of decreased surface areas of their somata. This study provides the first evidence of the effects of high CO 2 levels at multiple levels of biological organization in marine crabs, linking physiological and cellular changes with whole animal behavioural responses. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Durant, Andrea Khodikian, Elissa Porteus, Cosima S. |
spellingShingle |
Durant, Andrea Khodikian, Elissa Porteus, Cosima S. Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
author_facet |
Durant, Andrea Khodikian, Elissa Porteus, Cosima S. |
author_sort |
Durant, Andrea |
title |
Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
title_short |
Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
title_full |
Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
title_fullStr |
Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
title_full_unstemmed |
Ocean acidification alters foraging behaviour in Dungeness crab through impairment of the olfactory pathway |
title_sort |
ocean acidification alters foraging behaviour in dungeness crab through impairment of the olfactory pathway |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/gcb.16738 https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.16738 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Global Change Biology volume 29, issue 14, page 4126-4139 ISSN 1354-1013 1365-2486 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/gcb.16738 |
container_title |
Global Change Biology |
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29 |
container_issue |
14 |
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4126 |
op_container_end_page |
4139 |
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1802648556598722560 |