Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery
Abstract In this study, heart rate (HR) bio‐loggers were implanted in the abdominal cavity of 12 post‐smolt Atlantic salmon Salmo salar weighing 1024 ± 31 g and acclimated to 12°C sea water. One week after the surgical procedure, a critical swim speed ( U crit ) test was performed on tagged and unta...
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crwiley:10.1111/jfb.14561 2024-09-15T17:56:22+00:00 Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery Hvas, Malthe Folkedal, Ole Oppedal, Frode Norges Forskningsråd The Research Council 2020 http://dx.doi.org/10.1111/jfb.14561 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14561 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.14561 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 98, issue 1, page 102-111 ISSN 0022-1112 1095-8649 journal-article 2020 crwiley https://doi.org/10.1111/jfb.14561 2024-09-03T04:26:39Z Abstract In this study, heart rate (HR) bio‐loggers were implanted in the abdominal cavity of 12 post‐smolt Atlantic salmon Salmo salar weighing 1024 ± 31 g and acclimated to 12°C sea water. One week after the surgical procedure, a critical swim speed ( U crit ) test was performed on tagged and untagged conspecifics, whereafter tagged fish were maintained in their holding tanks for another week. The U crit was statistically similar between tagged and untagged fish (2.67 ± 0.04 and 2.74 ± 0.05 body lengths s −1 , respectively) showing that the bio‐logger did not compromise the swimming performance. In the pre‐swim week, a diurnal cycle was apparent with HR peaking at 65 beats min −1 during the day and approaching 40 beats min −1 at night. In the U crit test, HR increased approximately exponentially with swimming speed until a plateau was reached at the final speed before fatigue with a maximum of 85.2 ± 0.7 beats min −1 . During subsequent recovery tagged fish could be divided into a surviving group ( N = 8) and a moribund group ( N = 4). In surviving fish HR had fully recovered to pre‐swim levels after 24 h, including reestablishment of a diurnal HR cycle. In moribund fish HR never recovered and remained elevated at c. 80 beats min −1 for 4 days, whereafter they started dying. We did not identify a proximal cause of death in moribund fish, but possible explanations are discussed. Tail beat frequency (TBF) was also measured and showed a more consistent response to increased swimming speeds. As such, when exploring correlations between HR, TBF and metabolic rates at different swimming speeds, TBF provides better predictions. On the contrary, HR measurements in free swimming fish over extended periods of time are useful for other purposes such as assessing the accumulative burden of various stressors and recovery trajectories from exhaustive exercise. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology 98 1 102 111 |
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Wiley Online Library |
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English |
description |
Abstract In this study, heart rate (HR) bio‐loggers were implanted in the abdominal cavity of 12 post‐smolt Atlantic salmon Salmo salar weighing 1024 ± 31 g and acclimated to 12°C sea water. One week after the surgical procedure, a critical swim speed ( U crit ) test was performed on tagged and untagged conspecifics, whereafter tagged fish were maintained in their holding tanks for another week. The U crit was statistically similar between tagged and untagged fish (2.67 ± 0.04 and 2.74 ± 0.05 body lengths s −1 , respectively) showing that the bio‐logger did not compromise the swimming performance. In the pre‐swim week, a diurnal cycle was apparent with HR peaking at 65 beats min −1 during the day and approaching 40 beats min −1 at night. In the U crit test, HR increased approximately exponentially with swimming speed until a plateau was reached at the final speed before fatigue with a maximum of 85.2 ± 0.7 beats min −1 . During subsequent recovery tagged fish could be divided into a surviving group ( N = 8) and a moribund group ( N = 4). In surviving fish HR had fully recovered to pre‐swim levels after 24 h, including reestablishment of a diurnal HR cycle. In moribund fish HR never recovered and remained elevated at c. 80 beats min −1 for 4 days, whereafter they started dying. We did not identify a proximal cause of death in moribund fish, but possible explanations are discussed. Tail beat frequency (TBF) was also measured and showed a more consistent response to increased swimming speeds. As such, when exploring correlations between HR, TBF and metabolic rates at different swimming speeds, TBF provides better predictions. On the contrary, HR measurements in free swimming fish over extended periods of time are useful for other purposes such as assessing the accumulative burden of various stressors and recovery trajectories from exhaustive exercise. |
author2 |
Norges Forskningsråd The Research Council |
format |
Article in Journal/Newspaper |
author |
Hvas, Malthe Folkedal, Ole Oppedal, Frode |
spellingShingle |
Hvas, Malthe Folkedal, Ole Oppedal, Frode Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
author_facet |
Hvas, Malthe Folkedal, Ole Oppedal, Frode |
author_sort |
Hvas, Malthe |
title |
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
title_short |
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
title_full |
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
title_fullStr |
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
title_full_unstemmed |
Heart rates of Atlantic salmon Salmo salar during a critical swim speed test and subsequent recovery |
title_sort |
heart rates of atlantic salmon salmo salar during a critical swim speed test and subsequent recovery |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/jfb.14561 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.14561 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jfb.14561 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 98, issue 1, page 102-111 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jfb.14561 |
container_title |
Journal of Fish Biology |
container_volume |
98 |
container_issue |
1 |
container_start_page |
102 |
op_container_end_page |
111 |
_version_ |
1810432568638570496 |