Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events
Advances in tag technology now make it possible to monitor the behavior of small groups of individual fish as bioindicators of population wellbeing in commercial aquaculture settings. For example, tags may detect unusual patterns in fish heart rate, which could serve as an early indicator of whether...
Published in: | Frontiers in Physiology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11250/2832376 https://doi.org/10.3389/fphys.2021.755659 |
id |
ftimr:oai:imr.brage.unit.no:11250/2832376 |
---|---|
record_format |
openpolar |
spelling |
ftimr:oai:imr.brage.unit.no:11250/2832376 2023-05-15T15:32:54+02:00 Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events Warren-Myers, Fletcher Hvas, Malthe Vågseth, Tone Dempster, Tim Oppedal, Frode 2021 application/pdf https://hdl.handle.net/11250/2832376 https://doi.org/10.3389/fphys.2021.755659 eng eng Havforskningsinstituttet: 14597-09 Havforskningsinstituttet: 14597-14 Norges forskningsråd: 267800 Norges forskningsråd: 296157 Norges forskningsråd: 207116 Frontiers in Physiology. 2021, . urn:issn:1664-042X https://hdl.handle.net/11250/2832376 https://doi.org/10.3389/fphys.2021.755659 cristin:1960934 13 Frontiers in Physiology Peer reviewed Journal article 2021 ftimr https://doi.org/10.3389/fphys.2021.755659 2021-12-08T23:37:32Z Advances in tag technology now make it possible to monitor the behavior of small groups of individual fish as bioindicators of population wellbeing in commercial aquaculture settings. For example, tags may detect unusual patterns in fish heart rate, which could serve as an early indicator of whether fish health or welfare is becoming compromised. Here, we investigated the use of commercially available heart rate biologgers implanted into 24 Atlantic salmon weighing 3.6 ± 0.8 kg (mean ± SD) to monitor fish over 5 months in a standard 12 m × 12 m square sea cage containing ∼6,000 conspecifics. Post tagging, fish established a diurnal heart rate rhythm within 24 h, which stabilized after 4 days. Whilst the registered tagged fish mortality over the trial period was 0%, only 75% of tagged fish were recaptured at harvest, resulting in an unexplained tag loss rate of 25%. After 5 months, tagged fish were approximately 20% lighter and 8% shorter, but of the similar condition when compared to untagged fish. Distinct diurnal heart rate patterns were observed and changed with seasonal day length of natural illumination. Fish exhibited lower heart rates at night [winter 39 ± 0.2 beats per min (bpm), spring 37 ± 0.2 bpm, summer 43 ± 0.3 bpm, mean ± SE] than during the day (winter 50 ± 0.3 bpm, spring 48 ± 0.2 bpm, summer 49 ± 0.2 bpm) with the difference between night and day heart rates near half during the summer (6 bpm) compared to winter and spring (both 11 bpm). When fish experienced moderate and severe crowding events in early summer, the highest hourly heart rates reached 60 ± 2.5 bpm and 72 ± 2.4 bpm, respectively, on the day of crowding. Here, if the negative sublethal effects on fish that carry tags (e.g., growth rate) can be substantially reduced, the ability to monitor diurnal heart rate patterns across seasons and detect changes during crowding events, and using heart rate biologgers could be a useful warning mechanism for detecting sudden changes in fish behavior in sea cages. publishedVersion Article in Journal/Newspaper Atlantic salmon Institute for Marine Research: Brage IMR Frontiers in Physiology 12 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
Advances in tag technology now make it possible to monitor the behavior of small groups of individual fish as bioindicators of population wellbeing in commercial aquaculture settings. For example, tags may detect unusual patterns in fish heart rate, which could serve as an early indicator of whether fish health or welfare is becoming compromised. Here, we investigated the use of commercially available heart rate biologgers implanted into 24 Atlantic salmon weighing 3.6 ± 0.8 kg (mean ± SD) to monitor fish over 5 months in a standard 12 m × 12 m square sea cage containing ∼6,000 conspecifics. Post tagging, fish established a diurnal heart rate rhythm within 24 h, which stabilized after 4 days. Whilst the registered tagged fish mortality over the trial period was 0%, only 75% of tagged fish were recaptured at harvest, resulting in an unexplained tag loss rate of 25%. After 5 months, tagged fish were approximately 20% lighter and 8% shorter, but of the similar condition when compared to untagged fish. Distinct diurnal heart rate patterns were observed and changed with seasonal day length of natural illumination. Fish exhibited lower heart rates at night [winter 39 ± 0.2 beats per min (bpm), spring 37 ± 0.2 bpm, summer 43 ± 0.3 bpm, mean ± SE] than during the day (winter 50 ± 0.3 bpm, spring 48 ± 0.2 bpm, summer 49 ± 0.2 bpm) with the difference between night and day heart rates near half during the summer (6 bpm) compared to winter and spring (both 11 bpm). When fish experienced moderate and severe crowding events in early summer, the highest hourly heart rates reached 60 ± 2.5 bpm and 72 ± 2.4 bpm, respectively, on the day of crowding. Here, if the negative sublethal effects on fish that carry tags (e.g., growth rate) can be substantially reduced, the ability to monitor diurnal heart rate patterns across seasons and detect changes during crowding events, and using heart rate biologgers could be a useful warning mechanism for detecting sudden changes in fish behavior in sea cages. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Warren-Myers, Fletcher Hvas, Malthe Vågseth, Tone Dempster, Tim Oppedal, Frode |
spellingShingle |
Warren-Myers, Fletcher Hvas, Malthe Vågseth, Tone Dempster, Tim Oppedal, Frode Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
author_facet |
Warren-Myers, Fletcher Hvas, Malthe Vågseth, Tone Dempster, Tim Oppedal, Frode |
author_sort |
Warren-Myers, Fletcher |
title |
Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
title_short |
Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
title_full |
Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
title_fullStr |
Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
title_full_unstemmed |
Sentinels in Salmon Aquaculture: Heart Rates Across Seasons and During Crowding Events |
title_sort |
sentinels in salmon aquaculture: heart rates across seasons and during crowding events |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2832376 https://doi.org/10.3389/fphys.2021.755659 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
13 Frontiers in Physiology |
op_relation |
Havforskningsinstituttet: 14597-09 Havforskningsinstituttet: 14597-14 Norges forskningsråd: 267800 Norges forskningsråd: 296157 Norges forskningsråd: 207116 Frontiers in Physiology. 2021, . urn:issn:1664-042X https://hdl.handle.net/11250/2832376 https://doi.org/10.3389/fphys.2021.755659 cristin:1960934 |
op_doi |
https://doi.org/10.3389/fphys.2021.755659 |
container_title |
Frontiers in Physiology |
container_volume |
12 |
_version_ |
1766363379064111104 |