Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures
We investigated how acclimation to 8, 4 and 1°C, and acute cooling from 8 to 1°C, affected the Atlantic salmon's aerobic and anaerobic metabolism, and cardiac function, during a critical swim speed (U(crit)) test. This study revealed several interesting temperature-dependent effects. First, whi...
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ftpubmed:oai:pubmedcentral.nih.gov:10499030 2023-10-09T21:50:00+02:00 Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures Porter, Emma S. Gamperl, A. Kurt 2023-09-06 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10499030/ http://www.ncbi.nlm.nih.gov/pubmed/37661722 https://doi.org/10.1242/jeb.245990 en eng The Company of Biologists Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10499030/ http://www.ncbi.nlm.nih.gov/pubmed/37661722 http://dx.doi.org/10.1242/jeb.245990 © 2023. Published by The Company of Biologists Ltd https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0 (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. J Exp Biol Research Article Text 2023 ftpubmed https://doi.org/10.1242/jeb.245990 2023-09-17T01:00:16Z We investigated how acclimation to 8, 4 and 1°C, and acute cooling from 8 to 1°C, affected the Atlantic salmon's aerobic and anaerobic metabolism, and cardiac function, during a critical swim speed (U(crit)) test. This study revealed several interesting temperature-dependent effects. First, while differences in resting heart rate (f(H)) between groups were predictable based on previous research (range ∼28–65 beats min(−1)), with values for 1°C-acclimated fish slightly higher than those of acutely exposed conspecifics, the resting cardiac output ([Image: see text]) of 1°C-acclimated fish was much lower and compensated for by a higher resting blood oxygen extraction (Ṁ(O(2))/[Image: see text]). In contrast, the acutely exposed fish had a ∼2-fold greater resting stroke volume (V(S)) compared with that of the other groups. Second, increases in f(H) (1.2- to 1.4-fold) contributed little to [Image: see text] during the U(crit) test, and the contributions of [Image: see text] (V(S)) versus Ṁ(O(2))/[Image: see text] to aerobic scope (AS) were very different in the two groups tested at 1°C (1°C-acclimated and 8–1°C fish). Finally, U(crit) was 2.08 and 1.69 body lengths (BL) s(−1) in the 8 and 4°C-acclimated groups, but only 1.27 and 1.44 BL s(−1) in the 1°C-acclimated and 8–1°C fish, respectively – this lower value in 1°C versus 8–1°C fish despite higher values for maximum metabolic rate and AS. These data: support recent studies which suggest that the capacity to increase f(H) is constrained at low temperatures; show that cardiorespiratory function at cold temperatures, and its response to increased demands, depends on exposure duration; and suggest that AS does not constrain swimming capacity in salmon when chronically exposed to temperatures approaching their lower limit. Text Atlantic salmon Salmo salar PubMed Central (PMC) Journal of Experimental Biology 226 17 |
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Research Article Porter, Emma S. Gamperl, A. Kurt Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
topic_facet |
Research Article |
description |
We investigated how acclimation to 8, 4 and 1°C, and acute cooling from 8 to 1°C, affected the Atlantic salmon's aerobic and anaerobic metabolism, and cardiac function, during a critical swim speed (U(crit)) test. This study revealed several interesting temperature-dependent effects. First, while differences in resting heart rate (f(H)) between groups were predictable based on previous research (range ∼28–65 beats min(−1)), with values for 1°C-acclimated fish slightly higher than those of acutely exposed conspecifics, the resting cardiac output ([Image: see text]) of 1°C-acclimated fish was much lower and compensated for by a higher resting blood oxygen extraction (Ṁ(O(2))/[Image: see text]). In contrast, the acutely exposed fish had a ∼2-fold greater resting stroke volume (V(S)) compared with that of the other groups. Second, increases in f(H) (1.2- to 1.4-fold) contributed little to [Image: see text] during the U(crit) test, and the contributions of [Image: see text] (V(S)) versus Ṁ(O(2))/[Image: see text] to aerobic scope (AS) were very different in the two groups tested at 1°C (1°C-acclimated and 8–1°C fish). Finally, U(crit) was 2.08 and 1.69 body lengths (BL) s(−1) in the 8 and 4°C-acclimated groups, but only 1.27 and 1.44 BL s(−1) in the 1°C-acclimated and 8–1°C fish, respectively – this lower value in 1°C versus 8–1°C fish despite higher values for maximum metabolic rate and AS. These data: support recent studies which suggest that the capacity to increase f(H) is constrained at low temperatures; show that cardiorespiratory function at cold temperatures, and its response to increased demands, depends on exposure duration; and suggest that AS does not constrain swimming capacity in salmon when chronically exposed to temperatures approaching their lower limit. |
format |
Text |
author |
Porter, Emma S. Gamperl, A. Kurt |
author_facet |
Porter, Emma S. Gamperl, A. Kurt |
author_sort |
Porter, Emma S. |
title |
Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
title_short |
Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
title_full |
Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
title_fullStr |
Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
title_full_unstemmed |
Cardiorespiratory physiology and swimming capacity of Atlantic salmon (Salmo salar) at cold temperatures |
title_sort |
cardiorespiratory physiology and swimming capacity of atlantic salmon (salmo salar) at cold temperatures |
publisher |
The Company of Biologists Ltd |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10499030/ http://www.ncbi.nlm.nih.gov/pubmed/37661722 https://doi.org/10.1242/jeb.245990 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
J Exp Biol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10499030/ http://www.ncbi.nlm.nih.gov/pubmed/37661722 http://dx.doi.org/10.1242/jeb.245990 |
op_rights |
© 2023. Published by The Company of Biologists Ltd https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0 (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed. |
op_doi |
https://doi.org/10.1242/jeb.245990 |
container_title |
Journal of Experimental Biology |
container_volume |
226 |
container_issue |
17 |
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1779313059734487040 |