Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides)
Greenland halibut (Reinhardtius hippoglossoides), especially juveniles, are frequently found in severely hypoxic areas (18%–25% saturation) of the St. Lawrence Estuary. We investigated the tolerance of this species to hypoxia and evaluated the consequences of low oxygen levels on metabolic capacity....
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
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crcansciencepubl:10.1139/cjfas-2012-0327 2024-06-23T07:53:14+00:00 Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) Dupont-Prinet, Aurélie Vagner, Marie Chabot, Denis Audet, Céline MacLatchey, Deborah 2013 http://dx.doi.org/10.1139/cjfas-2012-0327 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0327 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0327 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 3, page 461-469 ISSN 0706-652X 1205-7533 journal-article 2013 crcansciencepubl https://doi.org/10.1139/cjfas-2012-0327 2024-05-24T13:05:52Z Greenland halibut (Reinhardtius hippoglossoides), especially juveniles, are frequently found in severely hypoxic areas (18%–25% saturation) of the St. Lawrence Estuary. We investigated the tolerance of this species to hypoxia and evaluated the consequences of low oxygen levels on metabolic capacity. At 5 °C, juveniles had a higher critical oxygen threshold than adults (15% versus 11% saturation), indicating that they were less tolerant to hypoxia. Severe hypoxia (19% saturation) did not affect the juveniles' standard metabolic rate but significantly reduced (by 55%) their maximum metabolic rate compared with normoxia. Consequently, the aerobic scope was reduced by 72% in hypoxia compared with normoxia. In juveniles, severe hypoxia increased the duration of digestive processes. The decrease in aerobic scope in hypoxia and the determination of critical oxygen threshold at a saturation level close to actual field dissolved oxygen values strongly suggest that juveniles from the St. Lawrence Estuary are living at the edge of their metabolic capacity. Consequently, the growth and distribution of Greenland halibut could be affected if there are further declines in dissolved oxygen availability. Article in Journal/Newspaper Greenland Canadian Science Publishing Greenland Canadian Journal of Fisheries and Aquatic Sciences 70 3 461 469 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Greenland halibut (Reinhardtius hippoglossoides), especially juveniles, are frequently found in severely hypoxic areas (18%–25% saturation) of the St. Lawrence Estuary. We investigated the tolerance of this species to hypoxia and evaluated the consequences of low oxygen levels on metabolic capacity. At 5 °C, juveniles had a higher critical oxygen threshold than adults (15% versus 11% saturation), indicating that they were less tolerant to hypoxia. Severe hypoxia (19% saturation) did not affect the juveniles' standard metabolic rate but significantly reduced (by 55%) their maximum metabolic rate compared with normoxia. Consequently, the aerobic scope was reduced by 72% in hypoxia compared with normoxia. In juveniles, severe hypoxia increased the duration of digestive processes. The decrease in aerobic scope in hypoxia and the determination of critical oxygen threshold at a saturation level close to actual field dissolved oxygen values strongly suggest that juveniles from the St. Lawrence Estuary are living at the edge of their metabolic capacity. Consequently, the growth and distribution of Greenland halibut could be affected if there are further declines in dissolved oxygen availability. |
author2 |
MacLatchey, Deborah |
format |
Article in Journal/Newspaper |
author |
Dupont-Prinet, Aurélie Vagner, Marie Chabot, Denis Audet, Céline |
spellingShingle |
Dupont-Prinet, Aurélie Vagner, Marie Chabot, Denis Audet, Céline Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
author_facet |
Dupont-Prinet, Aurélie Vagner, Marie Chabot, Denis Audet, Céline |
author_sort |
Dupont-Prinet, Aurélie |
title |
Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
title_short |
Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
title_full |
Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
title_fullStr |
Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
title_full_unstemmed |
Impact of hypoxia on the metabolism of Greenland halibut ( Reinhardtius hippoglossoides) |
title_sort |
impact of hypoxia on the metabolism of greenland halibut ( reinhardtius hippoglossoides) |
publisher |
Canadian Science Publishing |
publishDate |
2013 |
url |
http://dx.doi.org/10.1139/cjfas-2012-0327 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2012-0327 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2012-0327 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 70, issue 3, page 461-469 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2012-0327 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
70 |
container_issue |
3 |
container_start_page |
461 |
op_container_end_page |
469 |
_version_ |
1802644795093417984 |