Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2
Abstract Increased oceanic uptake of atmospheric carbon dioxide (CO2) is a threat to marine organisms and ecosystems. Among the most dramatic consequences predicted to date are behavioural impairments in marine fish which appear to be caused by the interference of elevated CO2 with a key neurotransm...
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Online Access: | http://dx.doi.org/10.1093/icesjms/fsv085 http://academic.oup.com/icesjms/article-pdf/73/3/633/31231835/fsv085.pdf |
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croxfordunivpr:10.1093/icesjms/fsv085 2024-09-15T18:28:12+00:00 Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 Heinrich, Dennis D. U. Watson, Sue-Ann Rummer, Jodie L. Brandl, Simon J. Simpfendorfer, Colin A. Heupel, Michelle R. Munday, Philip L. 2015 http://dx.doi.org/10.1093/icesjms/fsv085 http://academic.oup.com/icesjms/article-pdf/73/3/633/31231835/fsv085.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 73, issue 3, page 633-640 ISSN 1095-9289 1054-3139 journal-article 2015 croxfordunivpr https://doi.org/10.1093/icesjms/fsv085 2024-07-29T04:21:09Z Abstract Increased oceanic uptake of atmospheric carbon dioxide (CO2) is a threat to marine organisms and ecosystems. Among the most dramatic consequences predicted to date are behavioural impairments in marine fish which appear to be caused by the interference of elevated CO2 with a key neurotransmitter receptor in the brain. In this study, we tested the effects of elevated CO2 on the foraging and shelter-seeking behaviours of the reef-dwelling epaulette shark, Hemiscyllium ocellatum. Juvenile sharks were exposed for 30 d to control CO2 (400 µatm) and two elevated CO2 treatments (615 and 910 µatm), consistent with medium- and high-end projections for ocean pCO2 by 2100. Contrary to the effects observed in teleosts and in some other sharks, behaviour of the epaulette shark was unaffected by elevated CO2. A potential explanation is the remarkable adaptation of H. ocellatum to low environmental oxygen conditions (hypoxia) and diel fluctuations in CO2 encountered in their shallow reef habitat. This ability translates into behavioural tolerance of near-future ocean acidification, suggesting that behavioural tolerance and subsequent adaptation to projected future CO2 levels might be possible in some other fish, if adaptation can keep pace with the rate of rising CO2 levels. Article in Journal/Newspaper Ocean acidification Oxford University Press ICES Journal of Marine Science 73 3 633 640 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
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English |
description |
Abstract Increased oceanic uptake of atmospheric carbon dioxide (CO2) is a threat to marine organisms and ecosystems. Among the most dramatic consequences predicted to date are behavioural impairments in marine fish which appear to be caused by the interference of elevated CO2 with a key neurotransmitter receptor in the brain. In this study, we tested the effects of elevated CO2 on the foraging and shelter-seeking behaviours of the reef-dwelling epaulette shark, Hemiscyllium ocellatum. Juvenile sharks were exposed for 30 d to control CO2 (400 µatm) and two elevated CO2 treatments (615 and 910 µatm), consistent with medium- and high-end projections for ocean pCO2 by 2100. Contrary to the effects observed in teleosts and in some other sharks, behaviour of the epaulette shark was unaffected by elevated CO2. A potential explanation is the remarkable adaptation of H. ocellatum to low environmental oxygen conditions (hypoxia) and diel fluctuations in CO2 encountered in their shallow reef habitat. This ability translates into behavioural tolerance of near-future ocean acidification, suggesting that behavioural tolerance and subsequent adaptation to projected future CO2 levels might be possible in some other fish, if adaptation can keep pace with the rate of rising CO2 levels. |
format |
Article in Journal/Newspaper |
author |
Heinrich, Dennis D. U. Watson, Sue-Ann Rummer, Jodie L. Brandl, Simon J. Simpfendorfer, Colin A. Heupel, Michelle R. Munday, Philip L. |
spellingShingle |
Heinrich, Dennis D. U. Watson, Sue-Ann Rummer, Jodie L. Brandl, Simon J. Simpfendorfer, Colin A. Heupel, Michelle R. Munday, Philip L. Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
author_facet |
Heinrich, Dennis D. U. Watson, Sue-Ann Rummer, Jodie L. Brandl, Simon J. Simpfendorfer, Colin A. Heupel, Michelle R. Munday, Philip L. |
author_sort |
Heinrich, Dennis D. U. |
title |
Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
title_short |
Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
title_full |
Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
title_fullStr |
Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
title_full_unstemmed |
Foraging behaviour of the epaulette shark Hemiscyllium ocellatum is not affected by elevated CO2 |
title_sort |
foraging behaviour of the epaulette shark hemiscyllium ocellatum is not affected by elevated co2 |
publisher |
Oxford University Press (OUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1093/icesjms/fsv085 http://academic.oup.com/icesjms/article-pdf/73/3/633/31231835/fsv085.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ICES Journal of Marine Science volume 73, issue 3, page 633-640 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsv085 |
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ICES Journal of Marine Science |
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73 |
container_issue |
3 |
container_start_page |
633 |
op_container_end_page |
640 |
_version_ |
1810469524515848192 |