Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives
Management of gases during diving is not well understood across marine mammal species. Prior to diving, phocid (true) seals generally exhale, a behaviour thought to assist with the prevention of decompression sickness. Otariid seals (fur seals and sea lions) have a greater reliance on their lung oxy...
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ftpubmed:oai:pubmedcentral.nih.gov:8200655 2023-05-15T13:36:39+02:00 Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives Hooker, Sascha K. Andrews, Russel D. Arnould, John P. Y. Bester, Marthán N. Davis, Randall W. Insley, Stephen J. Gales, Nick J. Goldsworthy, Simon D. McKnight, J. Chris 2021-08-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200655/ http://www.ncbi.nlm.nih.gov/pubmed/34121462 https://doi.org/10.1098/rstb.2020.0219 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200655/ http://www.ncbi.nlm.nih.gov/pubmed/34121462 http://dx.doi.org/10.1098/rstb.2020.0219 © 2021 The Author(s) https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdfhttps://royalsociety.org/journals/ethics-policies/data-sharing-mining/Published by the Royal Society. All rights reserved. Philos Trans R Soc Lond B Biol Sci Articles Text 2021 ftpubmed https://doi.org/10.1098/rstb.2020.0219 2022-08-07T00:27:52Z Management of gases during diving is not well understood across marine mammal species. Prior to diving, phocid (true) seals generally exhale, a behaviour thought to assist with the prevention of decompression sickness. Otariid seals (fur seals and sea lions) have a greater reliance on their lung oxygen stores, and inhale prior to diving. One otariid, the Antarctic fur seal (Arctocephalus gazella), then exhales during the final 50–85% of the return to the surface, which may prevent another gas management issue: shallow-water blackout. Here, we compare data collected from animal-attached tags (video cameras, hydrophones and conductivity sensors) deployed on a suite of otariid seal species to examine the ubiquity of ascent exhalations for this group. We find evidence for ascent exhalations across four fur seal species, but that such exhalations are absent for three sea lion species. Fur seals and sea lions are no longer genetically separated into distinct subfamilies, but are morphologically distinguished by the thick underfur layer of fur seals. Together with their smaller size and energetic dives, we suggest their air-filled fur might underlie the need to perform these exhalations, although whether to reduce buoyancy and ascent speed, for the avoidance of shallow-water blackout or to prevent other cardiovascular management issues in their diving remains unclear. This article is part of the theme issue ‘Measuring physiology in free-living animals (Part I)’. Text Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella PubMed Central (PMC) Antarctic The Antarctic Philosophical Transactions of the Royal Society B: Biological Sciences 376 1830 20200219 |
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Articles Hooker, Sascha K. Andrews, Russel D. Arnould, John P. Y. Bester, Marthán N. Davis, Randall W. Insley, Stephen J. Gales, Nick J. Goldsworthy, Simon D. McKnight, J. Chris Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
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Management of gases during diving is not well understood across marine mammal species. Prior to diving, phocid (true) seals generally exhale, a behaviour thought to assist with the prevention of decompression sickness. Otariid seals (fur seals and sea lions) have a greater reliance on their lung oxygen stores, and inhale prior to diving. One otariid, the Antarctic fur seal (Arctocephalus gazella), then exhales during the final 50–85% of the return to the surface, which may prevent another gas management issue: shallow-water blackout. Here, we compare data collected from animal-attached tags (video cameras, hydrophones and conductivity sensors) deployed on a suite of otariid seal species to examine the ubiquity of ascent exhalations for this group. We find evidence for ascent exhalations across four fur seal species, but that such exhalations are absent for three sea lion species. Fur seals and sea lions are no longer genetically separated into distinct subfamilies, but are morphologically distinguished by the thick underfur layer of fur seals. Together with their smaller size and energetic dives, we suggest their air-filled fur might underlie the need to perform these exhalations, although whether to reduce buoyancy and ascent speed, for the avoidance of shallow-water blackout or to prevent other cardiovascular management issues in their diving remains unclear. This article is part of the theme issue ‘Measuring physiology in free-living animals (Part I)’. |
format |
Text |
author |
Hooker, Sascha K. Andrews, Russel D. Arnould, John P. Y. Bester, Marthán N. Davis, Randall W. Insley, Stephen J. Gales, Nick J. Goldsworthy, Simon D. McKnight, J. Chris |
author_facet |
Hooker, Sascha K. Andrews, Russel D. Arnould, John P. Y. Bester, Marthán N. Davis, Randall W. Insley, Stephen J. Gales, Nick J. Goldsworthy, Simon D. McKnight, J. Chris |
author_sort |
Hooker, Sascha K. |
title |
Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
title_short |
Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
title_full |
Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
title_fullStr |
Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
title_full_unstemmed |
Fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
title_sort |
fur seals do, but sea lions don't — cross taxa insights into exhalation during ascent from dives |
publisher |
The Royal Society |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200655/ http://www.ncbi.nlm.nih.gov/pubmed/34121462 https://doi.org/10.1098/rstb.2020.0219 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Arctocephalus gazella |
op_source |
Philos Trans R Soc Lond B Biol Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8200655/ http://www.ncbi.nlm.nih.gov/pubmed/34121462 http://dx.doi.org/10.1098/rstb.2020.0219 |
op_rights |
© 2021 The Author(s) https://royalsociety.org/-/media/journals/author/Licence-to-Publish-20062019-final.pdfhttps://royalsociety.org/journals/ethics-policies/data-sharing-mining/Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rstb.2020.0219 |
container_title |
Philosophical Transactions of the Royal Society B: Biological Sciences |
container_volume |
376 |
container_issue |
1830 |
container_start_page |
20200219 |
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1766082052907597824 |