Warm water treatment increased mortality risk in salmon
Thermal treatment is a controversial method to control sea lice in the Atlantic salmon farming industry. This study aimed to complement the growing evidence base to document the impact of thermal treatments on salmon welfare, behaviour, physiology and health. Here, fish were treated two times (four...
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ftsintef:oai:sintef.brage.unit.no:11250/3018669 2023-05-15T15:31:39+02:00 Warm water treatment increased mortality risk in salmon Bui, Samantha Madaro, Angelico Nilsson, Jonatan Fjelldal, Per Gunnar Iversen, Martin Haugmo Brinchmann, Monica Fengsrud Venås, Birger Schrøder, Merete Bjørgan Stien, Lars Helge 2022 application/pdf https://hdl.handle.net/11250/3018669 https://doi.org/10.1016/j.vas.2022.100265 eng eng Elsevier Fiskeri- og havbruksnæringens forskningsfinansiering: 901649 Veterinary and Animal Science. 2022, 17, 1-12. urn:issn:2451-943X https://hdl.handle.net/11250/3018669 https://doi.org/10.1016/j.vas.2022.100265 cristin:2045066 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Author(s). Published by Elsevier Ltd CC-BY 12 17 Veterinary and Animal Science 100265 Atlantic salmon Stress Injuries Behaviour Mortality Delousing treatment Warm water treatment Peer reviewed Journal article 2022 ftsintef https://doi.org/10.1016/j.vas.2022.100265 2022-09-21T22:42:40Z Thermal treatment is a controversial method to control sea lice in the Atlantic salmon farming industry. This study aimed to complement the growing evidence base to document the impact of thermal treatments on salmon welfare, behaviour, physiology and health. Here, fish were treated two times (four weeks apart) for 30 s in either 27, 30, or 33 °C warm water, and parameters were compared to a procedural control (exposed to their holding temperature of 14 °C) or a negative control (where no treatments were applied). The fish had a clear behavioural response to the warm water, despite low difference between treatment and holding temperature (Δt = 13, 16 or 19 °C). Eye damages were more prevalent in the warm water treated groups than in the controls. Little difference was recorded between treatment groups in their growth and condition factor, blood plasma values, organ health, and long-term coping ability. There was, however, a significant increase in mortality as a function of temperature after the first treatment (14 °C: 6.5%, 27 °C: 5.3%, 30 °C: 12.4% and 33 °C: 18.9% mortality). The first treatment was performed only two weeks after the fish had been tagged and moved into the experimental holding tanks, while the fish had been allowed to recover for four weeks without any handling before the second treatment. The group of fish that were not subjected to any treatments (the negative control) had no mortality throughout the entire experimental period. publishedVersion Article in Journal/Newspaper Atlantic salmon SINTEF Open (Brage) Veterinary and Animal Science 17 100265 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Atlantic salmon Stress Injuries Behaviour Mortality Delousing treatment Warm water treatment |
spellingShingle |
Atlantic salmon Stress Injuries Behaviour Mortality Delousing treatment Warm water treatment Bui, Samantha Madaro, Angelico Nilsson, Jonatan Fjelldal, Per Gunnar Iversen, Martin Haugmo Brinchmann, Monica Fengsrud Venås, Birger Schrøder, Merete Bjørgan Stien, Lars Helge Warm water treatment increased mortality risk in salmon |
topic_facet |
Atlantic salmon Stress Injuries Behaviour Mortality Delousing treatment Warm water treatment |
description |
Thermal treatment is a controversial method to control sea lice in the Atlantic salmon farming industry. This study aimed to complement the growing evidence base to document the impact of thermal treatments on salmon welfare, behaviour, physiology and health. Here, fish were treated two times (four weeks apart) for 30 s in either 27, 30, or 33 °C warm water, and parameters were compared to a procedural control (exposed to their holding temperature of 14 °C) or a negative control (where no treatments were applied). The fish had a clear behavioural response to the warm water, despite low difference between treatment and holding temperature (Δt = 13, 16 or 19 °C). Eye damages were more prevalent in the warm water treated groups than in the controls. Little difference was recorded between treatment groups in their growth and condition factor, blood plasma values, organ health, and long-term coping ability. There was, however, a significant increase in mortality as a function of temperature after the first treatment (14 °C: 6.5%, 27 °C: 5.3%, 30 °C: 12.4% and 33 °C: 18.9% mortality). The first treatment was performed only two weeks after the fish had been tagged and moved into the experimental holding tanks, while the fish had been allowed to recover for four weeks without any handling before the second treatment. The group of fish that were not subjected to any treatments (the negative control) had no mortality throughout the entire experimental period. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Bui, Samantha Madaro, Angelico Nilsson, Jonatan Fjelldal, Per Gunnar Iversen, Martin Haugmo Brinchmann, Monica Fengsrud Venås, Birger Schrøder, Merete Bjørgan Stien, Lars Helge |
author_facet |
Bui, Samantha Madaro, Angelico Nilsson, Jonatan Fjelldal, Per Gunnar Iversen, Martin Haugmo Brinchmann, Monica Fengsrud Venås, Birger Schrøder, Merete Bjørgan Stien, Lars Helge |
author_sort |
Bui, Samantha |
title |
Warm water treatment increased mortality risk in salmon |
title_short |
Warm water treatment increased mortality risk in salmon |
title_full |
Warm water treatment increased mortality risk in salmon |
title_fullStr |
Warm water treatment increased mortality risk in salmon |
title_full_unstemmed |
Warm water treatment increased mortality risk in salmon |
title_sort |
warm water treatment increased mortality risk in salmon |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3018669 https://doi.org/10.1016/j.vas.2022.100265 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
12 17 Veterinary and Animal Science 100265 |
op_relation |
Fiskeri- og havbruksnæringens forskningsfinansiering: 901649 Veterinary and Animal Science. 2022, 17, 1-12. urn:issn:2451-943X https://hdl.handle.net/11250/3018669 https://doi.org/10.1016/j.vas.2022.100265 cristin:2045066 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2022 The Author(s). Published by Elsevier Ltd |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.vas.2022.100265 |
container_title |
Veterinary and Animal Science |
container_volume |
17 |
container_start_page |
100265 |
_version_ |
1766362185247752192 |