Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions
Polar cod (Boreogadus saida) is an important prey species in the Arctic ecosystem, yet its habitat is changing rapidly: climate change, through rising seawater temperatures and CO2 concentrations, is projected to be most pronounced in Arctic waters. This study aimed to investigate the influence of o...
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Online Access: | https://epic.awi.de/id/eprint/49144/ https://epic.awi.de/id/eprint/49144/1/Kunz_etal_2018.pdf https://doi.org/10.1242/jeb.184473 https://hdl.handle.net/10013/epic.12e29821-f625-47ec-a47d-112906b523de https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:49144 2023-05-15T14:59:53+02:00 Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions Kunz, Kristina Lore Claireaux, Guy Pörtner, Hans-Otto Knust, Rainer Mark, Felix Christopher 2018 application/pdf https://epic.awi.de/id/eprint/49144/ https://epic.awi.de/id/eprint/49144/1/Kunz_etal_2018.pdf https://doi.org/10.1242/jeb.184473 https://hdl.handle.net/10013/epic.12e29821-f625-47ec-a47d-112906b523de https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/49144/1/Kunz_etal_2018.pdf https://hdl.handle.net/ Kunz, K. L. , Claireaux, G. , Pörtner, H. O. orcid:0000-0001-6535-6575 , Knust, R. and Mark, F. C. orcid:0000-0002-5586-6704 (2018) Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions , The Journal of Experimental Biology, 221 (21), jeb184473 . doi:10.1242/jeb.184473 <https://doi.org/10.1242/jeb.184473> , hdl:10013/epic.12e29821-f625-47ec-a47d-112906b523de EPIC3The Journal of Experimental Biology, 221(21), pp. jeb184473, ISSN: 0022-0949 Article isiRev 2018 ftawi https://doi.org/10.1242/jeb.184473 2021-12-24T15:44:34Z Polar cod (Boreogadus saida) is an important prey species in the Arctic ecosystem, yet its habitat is changing rapidly: climate change, through rising seawater temperatures and CO2 concentrations, is projected to be most pronounced in Arctic waters. This study aimed to investigate the influence of ocean acidification and warming on maximum performance parameters of B. saida as indicators for the species' acclimation capacities under environmental conditions projected for the end of this century. After 4 months at four acclimation temperatures (0, 3, 6, 8°C) each combined with two PCO2 levels (390 and 1170 µatm), aerobic capacities and swimming performance of B. saida were recorded following a Ucrit protocol. At both CO2 levels, standard metabolic rate (SMR) was elevated at the highest acclimation temperature indicating thermal limitations. Maximum metabolic rate (MMR) increased continuously with temperature, suggesting an optimum temperature for aerobic scope for exercise (ASex) at 6°C. Aerobic swimming performance (Ugait) increased with acclimation temperature irrespective of CO2 levels, while critical swimming speed (Ucrit) did not reveal any clear trend with temperature. Hypercapnia evoked an increase in MMR (and thereby ASex). However, swimming performance (both Ugait and Ucrit) was impaired under elevated near-future PCO2 conditions, indicating reduced efficiencies of oxygen turnover. The contribution of anaerobic metabolism to swimming performance was very low overall, and further reduced under hypercapnia. Our results revealed high sensitivities of maximum performance parameters (MMR, Ugait, Ucrit) of B. saida to ocean acidification. Impaired swimming capacity under ocean acidification may reflect reduced future competitive strength of B. saida. Article in Journal/Newspaper Arctic Boreogadus saida Climate change Ocean acidification polar cod Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Journal of Experimental Biology |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Polar cod (Boreogadus saida) is an important prey species in the Arctic ecosystem, yet its habitat is changing rapidly: climate change, through rising seawater temperatures and CO2 concentrations, is projected to be most pronounced in Arctic waters. This study aimed to investigate the influence of ocean acidification and warming on maximum performance parameters of B. saida as indicators for the species' acclimation capacities under environmental conditions projected for the end of this century. After 4 months at four acclimation temperatures (0, 3, 6, 8°C) each combined with two PCO2 levels (390 and 1170 µatm), aerobic capacities and swimming performance of B. saida were recorded following a Ucrit protocol. At both CO2 levels, standard metabolic rate (SMR) was elevated at the highest acclimation temperature indicating thermal limitations. Maximum metabolic rate (MMR) increased continuously with temperature, suggesting an optimum temperature for aerobic scope for exercise (ASex) at 6°C. Aerobic swimming performance (Ugait) increased with acclimation temperature irrespective of CO2 levels, while critical swimming speed (Ucrit) did not reveal any clear trend with temperature. Hypercapnia evoked an increase in MMR (and thereby ASex). However, swimming performance (both Ugait and Ucrit) was impaired under elevated near-future PCO2 conditions, indicating reduced efficiencies of oxygen turnover. The contribution of anaerobic metabolism to swimming performance was very low overall, and further reduced under hypercapnia. Our results revealed high sensitivities of maximum performance parameters (MMR, Ugait, Ucrit) of B. saida to ocean acidification. Impaired swimming capacity under ocean acidification may reflect reduced future competitive strength of B. saida. |
format |
Article in Journal/Newspaper |
author |
Kunz, Kristina Lore Claireaux, Guy Pörtner, Hans-Otto Knust, Rainer Mark, Felix Christopher |
spellingShingle |
Kunz, Kristina Lore Claireaux, Guy Pörtner, Hans-Otto Knust, Rainer Mark, Felix Christopher Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
author_facet |
Kunz, Kristina Lore Claireaux, Guy Pörtner, Hans-Otto Knust, Rainer Mark, Felix Christopher |
author_sort |
Kunz, Kristina Lore |
title |
Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
title_short |
Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
title_full |
Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
title_fullStr |
Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
title_full_unstemmed |
Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions |
title_sort |
aerobic capacities and swimming performance of polar cod (boreogadus saida) under ocean acidification and warming conditions |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/49144/ https://epic.awi.de/id/eprint/49144/1/Kunz_etal_2018.pdf https://doi.org/10.1242/jeb.184473 https://hdl.handle.net/10013/epic.12e29821-f625-47ec-a47d-112906b523de https://hdl.handle.net/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Boreogadus saida Climate change Ocean acidification polar cod |
genre_facet |
Arctic Boreogadus saida Climate change Ocean acidification polar cod |
op_source |
EPIC3The Journal of Experimental Biology, 221(21), pp. jeb184473, ISSN: 0022-0949 |
op_relation |
https://epic.awi.de/id/eprint/49144/1/Kunz_etal_2018.pdf https://hdl.handle.net/ Kunz, K. L. , Claireaux, G. , Pörtner, H. O. orcid:0000-0001-6535-6575 , Knust, R. and Mark, F. C. orcid:0000-0002-5586-6704 (2018) Aerobic capacities and swimming performance of polar cod (Boreogadus saida) under ocean acidification and warming conditions , The Journal of Experimental Biology, 221 (21), jeb184473 . doi:10.1242/jeb.184473 <https://doi.org/10.1242/jeb.184473> , hdl:10013/epic.12e29821-f625-47ec-a47d-112906b523de |
op_doi |
https://doi.org/10.1242/jeb.184473 |
container_title |
Journal of Experimental Biology |
_version_ |
1766332001357398016 |