Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar)
Water supply is a limited resource in most salmon hatcheries, which is compensated by reduced water flow and oxygenation. However, reduced water exchange can lead to accumulation of CO2, resulting in environmental hypercapnia, which may have negative impacts on fish welfare. Thus, environmental hype...
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ftagderuniv:oai:uia.brage.unit.no:11250/3062879 2023-06-11T04:10:17+02:00 Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) Höglund, Erik Folkedal, Ole Aerts, Johan Hvas, Malthe Øverli, Øyvind Mangor-Jensen, Anders Vindas, Marco A. Nilsson, Jonatan Kristiansen, Tore 2023 application/pdf https://hdl.handle.net/11250/3062879 https://doi.org/10.1016/j.aquaculture.2023.739512 eng eng Elsevier Norges forskningsråd: 267788/E40 Höglund, E., Folkedal, O., Aerts, J., Hvas, M., Øverli, Ø., Mangor-Jensen, A., Vindas, M. A., Nilsson, J. & Kristiansen, T. (2023). Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar). Aquaculture, 572, 1-9. doi: urn:issn:0044-8486 https://hdl.handle.net/11250/3062879 https://doi.org/10.1016/j.aquaculture.2023.739512 cristin:2140389 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Author(s) 9 572 Aquaculture 739512 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Peer reviewed Journal article 2023 ftagderuniv https://doi.org/10.1016/j.aquaculture.2023.739512 2023-04-19T22:44:17Z Water supply is a limited resource in most salmon hatcheries, which is compensated by reduced water flow and oxygenation. However, reduced water exchange can lead to accumulation of CO2, resulting in environmental hypercapnia, which may have negative impacts on fish welfare. Thus, environmental hypercapnia can be a common welfare problem for salmon in hatcheries, and particularly in recirculating systems (RAS). In this experiment, Atlantic salmon were exposed to chronic environmental hypercapnia during the last 68 days of the freshwater phase, whereupon effects on physiological stress coping mechanisms and morphological welfare indicators were investigated. Effects on stress coping mechanisms were quantified by measuring changes in brain serotonergic chemistry and plasma cortisol at basal levels and in response to a standardized acute stress test. The results show that exposure to elevated CO2 saturation in the water compromised stress responsiveness of brainstem serotonergic activity, altered osmotic homeostasis, and suppressed growth indicating that fish experience allostatic overload. However, no effects on morphological welfare indicators were observed. This accentuates the need for physiological measures, including physiological responses to controlled challenges to activate the stress axis, when investigating the welfare status of fish reared in systems with potential high CO2. publishedVersion Paid open access Article in Journal/Newspaper Atlantic salmon Salmo salar Unvieristy of Agder: AURA (Brage) Aquaculture 572 739512 |
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Open Polar |
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Unvieristy of Agder: AURA (Brage) |
op_collection_id |
ftagderuniv |
language |
English |
topic |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Höglund, Erik Folkedal, Ole Aerts, Johan Hvas, Malthe Øverli, Øyvind Mangor-Jensen, Anders Vindas, Marco A. Nilsson, Jonatan Kristiansen, Tore Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
topic_facet |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
Water supply is a limited resource in most salmon hatcheries, which is compensated by reduced water flow and oxygenation. However, reduced water exchange can lead to accumulation of CO2, resulting in environmental hypercapnia, which may have negative impacts on fish welfare. Thus, environmental hypercapnia can be a common welfare problem for salmon in hatcheries, and particularly in recirculating systems (RAS). In this experiment, Atlantic salmon were exposed to chronic environmental hypercapnia during the last 68 days of the freshwater phase, whereupon effects on physiological stress coping mechanisms and morphological welfare indicators were investigated. Effects on stress coping mechanisms were quantified by measuring changes in brain serotonergic chemistry and plasma cortisol at basal levels and in response to a standardized acute stress test. The results show that exposure to elevated CO2 saturation in the water compromised stress responsiveness of brainstem serotonergic activity, altered osmotic homeostasis, and suppressed growth indicating that fish experience allostatic overload. However, no effects on morphological welfare indicators were observed. This accentuates the need for physiological measures, including physiological responses to controlled challenges to activate the stress axis, when investigating the welfare status of fish reared in systems with potential high CO2. publishedVersion Paid open access |
format |
Article in Journal/Newspaper |
author |
Höglund, Erik Folkedal, Ole Aerts, Johan Hvas, Malthe Øverli, Øyvind Mangor-Jensen, Anders Vindas, Marco A. Nilsson, Jonatan Kristiansen, Tore |
author_facet |
Höglund, Erik Folkedal, Ole Aerts, Johan Hvas, Malthe Øverli, Øyvind Mangor-Jensen, Anders Vindas, Marco A. Nilsson, Jonatan Kristiansen, Tore |
author_sort |
Höglund, Erik |
title |
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
title_short |
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
title_full |
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
title_fullStr |
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar) |
title_sort |
welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in atlantic salmon (salmo salar) |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3062879 https://doi.org/10.1016/j.aquaculture.2023.739512 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
9 572 Aquaculture 739512 |
op_relation |
Norges forskningsråd: 267788/E40 Höglund, E., Folkedal, O., Aerts, J., Hvas, M., Øverli, Ø., Mangor-Jensen, A., Vindas, M. A., Nilsson, J. & Kristiansen, T. (2023). Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar). Aquaculture, 572, 1-9. doi: urn:issn:0044-8486 https://hdl.handle.net/11250/3062879 https://doi.org/10.1016/j.aquaculture.2023.739512 cristin:2140389 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2023 The Author(s) |
op_doi |
https://doi.org/10.1016/j.aquaculture.2023.739512 |
container_title |
Aquaculture |
container_volume |
572 |
container_start_page |
739512 |
_version_ |
1768384601075482624 |