The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts
In this study, Atlantic salmon post smolts (~250 g, ~29 cm) were fasted for four weeks at 12 °C in full strength seawater. During this period, the critical swimming speed (Ucrit) was measured after 1, 2 and 4 weeks of fasting, as well as in a fed control group. Furthermore, blood samples were taken...
Published in: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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Online Access: | https://hdl.handle.net/11250/2786869 https://doi.org/10.1016/j.cbpa.2021.110913 |
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ftimr:oai:imr.brage.unit.no:11250/2786869 2023-05-15T15:30:56+02:00 The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts Hvas, Malthe Stien, Lars Helge Oppedal, Frode 2021 application/pdf https://hdl.handle.net/11250/2786869 https://doi.org/10.1016/j.cbpa.2021.110913 eng eng Norges forskningsråd: 295200 Norges forskningsråd: 237790 Comparative Biochemistry and Physiology A. 2021, 255 . urn:issn:1095-6433 https://hdl.handle.net/11250/2786869 https://doi.org/10.1016/j.cbpa.2021.110913 cristin:1928839 8 255 Comparative Biochemistry and Physiology A Peer reviewed Journal article 2021 ftimr https://doi.org/10.1016/j.cbpa.2021.110913 2021-10-06T22:36:45Z In this study, Atlantic salmon post smolts (~250 g, ~29 cm) were fasted for four weeks at 12 °C in full strength seawater. During this period, the critical swimming speed (Ucrit) was measured after 1, 2 and 4 weeks of fasting, as well as in a fed control group. Furthermore, blood samples were taken in each treatment group prior to the swim test, at fatigue, and following 3 h and 24 h of subsequent recovery. Four weeks of fasting gradually reduced the condition factor from 1.03 to 0.89. However, the Ucrit remained statistically unaffected at 3.5 body lengths s−1. Exhaustive exercise stress caused large increases in plasma osmolality, [Cl−], [Na+], [Ca2+], [lactate] and [cortisol], while haematocrit and [haemoglobin] also increased. Plasma ions and lactate had increased further after 3 h recovery, and osmolality, [Cl−] and [Na+] were still elevated above control levels after 24 h while other blood parameters were fully recovered. Osmotic disturbances may therefore be considered the most challenging stressor during strenuous exercise in seawater. Only minor effects of fasting period on blood parameters in response to exhaustive exercise were detected, which included slightly higher osmotic disturbances and a repressed response in red blood cell recruitment at fatigue in fasted fish. Furthermore, the 4-week fasting group had a reduced cortisol response following fatigue compared to the other treatment groups. In conclusion, these results show that Atlantic salmon maintain their full swimming capacity as well as their ability to respond and recover from acute stress during an extended period of food deprivation. publishedVersion Article in Journal/Newspaper Atlantic salmon Institute for Marine Research: Brage IMR Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 255 110913 |
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Open Polar |
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Institute for Marine Research: Brage IMR |
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ftimr |
language |
English |
description |
In this study, Atlantic salmon post smolts (~250 g, ~29 cm) were fasted for four weeks at 12 °C in full strength seawater. During this period, the critical swimming speed (Ucrit) was measured after 1, 2 and 4 weeks of fasting, as well as in a fed control group. Furthermore, blood samples were taken in each treatment group prior to the swim test, at fatigue, and following 3 h and 24 h of subsequent recovery. Four weeks of fasting gradually reduced the condition factor from 1.03 to 0.89. However, the Ucrit remained statistically unaffected at 3.5 body lengths s−1. Exhaustive exercise stress caused large increases in plasma osmolality, [Cl−], [Na+], [Ca2+], [lactate] and [cortisol], while haematocrit and [haemoglobin] also increased. Plasma ions and lactate had increased further after 3 h recovery, and osmolality, [Cl−] and [Na+] were still elevated above control levels after 24 h while other blood parameters were fully recovered. Osmotic disturbances may therefore be considered the most challenging stressor during strenuous exercise in seawater. Only minor effects of fasting period on blood parameters in response to exhaustive exercise were detected, which included slightly higher osmotic disturbances and a repressed response in red blood cell recruitment at fatigue in fasted fish. Furthermore, the 4-week fasting group had a reduced cortisol response following fatigue compared to the other treatment groups. In conclusion, these results show that Atlantic salmon maintain their full swimming capacity as well as their ability to respond and recover from acute stress during an extended period of food deprivation. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Hvas, Malthe Stien, Lars Helge Oppedal, Frode |
spellingShingle |
Hvas, Malthe Stien, Lars Helge Oppedal, Frode The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
author_facet |
Hvas, Malthe Stien, Lars Helge Oppedal, Frode |
author_sort |
Hvas, Malthe |
title |
The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
title_short |
The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
title_full |
The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
title_fullStr |
The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
title_full_unstemmed |
The effect of fasting period on swimming performance, blood parameters and stress recovery in Atlantic salmon post smolts |
title_sort |
effect of fasting period on swimming performance, blood parameters and stress recovery in atlantic salmon post smolts |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2786869 https://doi.org/10.1016/j.cbpa.2021.110913 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
8 255 Comparative Biochemistry and Physiology A |
op_relation |
Norges forskningsråd: 295200 Norges forskningsråd: 237790 Comparative Biochemistry and Physiology A. 2021, 255 . urn:issn:1095-6433 https://hdl.handle.net/11250/2786869 https://doi.org/10.1016/j.cbpa.2021.110913 cristin:1928839 |
op_doi |
https://doi.org/10.1016/j.cbpa.2021.110913 |
container_title |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
container_volume |
255 |
container_start_page |
110913 |
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1766361409126400000 |