The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater
A high-level of free CO2 is a prevalent feature of intensive RAS and chronic exposure is common for most species during the production process. Currently, standard operating procedures, regulations and “safe” levels of CO2 are based on values that do not necessarily represent a point at, up to which...
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ftdtupubl:oai:pure.atira.dk:publications/bebb8db1-cad2-474a-9077-a1222d671a61 2024-09-15T17:56:06+00:00 The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater Khan, Javed Rafiq Johansen, D. Skov, Peter Vilhelm 2018 https://orbit.dtu.dk/en/publications/bebb8db1-cad2-474a-9077-a1222d671a61 https://doi.org/10.1016/j.aquaculture.2018.03.010 eng eng https://orbit.dtu.dk/en/publications/bebb8db1-cad2-474a-9077-a1222d671a61 info:eu-repo/semantics/closedAccess Khan , J R , Johansen , D & Skov , P V 2018 , ' The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater ' , Aquaculture , vol. 491 , pp. 20-27 . https://doi.org/10.1016/j.aquaculture.2018.03.010 Carbon dioxide Atlantic salmon Recirculating aquaculture systems Growth Metabolic rate article 2018 ftdtupubl https://doi.org/10.1016/j.aquaculture.2018.03.010 2024-08-13T00:03:05Z A high-level of free CO2 is a prevalent feature of intensive RAS and chronic exposure is common for most species during the production process. Currently, standard operating procedures, regulations and “safe” levels of CO2 are based on values that do not necessarily represent a point at, up to which, production and fish performance are unaffected. The high solubility of CO2 in water and the large input from fish respiration also means that current practices for the removal of CO2 are often inadequate for the scale of production. High CO2 levels can be addressed by the control of alkalinity, thereby creating a scenario where the majority of CO2 exists as carbonate and bicarbonate. Any acute reduction in pH can shift the equilibrium towards a large and sudden conversion of inorganic carbon to free CO2, which can have a detrimental effect on fish. The current investigations aimed to determine the effects of both; acute increases in dissolved CO2 on the physiological capacity of Atlantic salmon, as well the effects of chronic exposure to different CO2 concentrations on production in freshwater. Results show that acute exposure (up to 40 mg L−1) significantly reduces aerobic capacity and the rate of recovery from stress. They also show that these effects are driven primarily by CO2 exposure, and to a much lesser extent by the associated reduction in pH. Growth and feed conversion experiments during chronic exposure suggest that there is no CO2 concentration where production performance is unaffected. Article in Journal/Newspaper Atlantic salmon Salmo salar Technical University of Denmark: DTU Orbit Aquaculture 491 20 27 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Carbon dioxide Atlantic salmon Recirculating aquaculture systems Growth Metabolic rate |
spellingShingle |
Carbon dioxide Atlantic salmon Recirculating aquaculture systems Growth Metabolic rate Khan, Javed Rafiq Johansen, D. Skov, Peter Vilhelm The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
topic_facet |
Carbon dioxide Atlantic salmon Recirculating aquaculture systems Growth Metabolic rate |
description |
A high-level of free CO2 is a prevalent feature of intensive RAS and chronic exposure is common for most species during the production process. Currently, standard operating procedures, regulations and “safe” levels of CO2 are based on values that do not necessarily represent a point at, up to which, production and fish performance are unaffected. The high solubility of CO2 in water and the large input from fish respiration also means that current practices for the removal of CO2 are often inadequate for the scale of production. High CO2 levels can be addressed by the control of alkalinity, thereby creating a scenario where the majority of CO2 exists as carbonate and bicarbonate. Any acute reduction in pH can shift the equilibrium towards a large and sudden conversion of inorganic carbon to free CO2, which can have a detrimental effect on fish. The current investigations aimed to determine the effects of both; acute increases in dissolved CO2 on the physiological capacity of Atlantic salmon, as well the effects of chronic exposure to different CO2 concentrations on production in freshwater. Results show that acute exposure (up to 40 mg L−1) significantly reduces aerobic capacity and the rate of recovery from stress. They also show that these effects are driven primarily by CO2 exposure, and to a much lesser extent by the associated reduction in pH. Growth and feed conversion experiments during chronic exposure suggest that there is no CO2 concentration where production performance is unaffected. |
format |
Article in Journal/Newspaper |
author |
Khan, Javed Rafiq Johansen, D. Skov, Peter Vilhelm |
author_facet |
Khan, Javed Rafiq Johansen, D. Skov, Peter Vilhelm |
author_sort |
Khan, Javed Rafiq |
title |
The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
title_short |
The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
title_full |
The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
title_fullStr |
The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
title_full_unstemmed |
The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater |
title_sort |
effects of acute and long-term exposure to co 2 on the respiratory physiology and production performance of atlantic salmon ( salmo salar ) in freshwater |
publishDate |
2018 |
url |
https://orbit.dtu.dk/en/publications/bebb8db1-cad2-474a-9077-a1222d671a61 https://doi.org/10.1016/j.aquaculture.2018.03.010 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Khan , J R , Johansen , D & Skov , P V 2018 , ' The effects of acute and long-term exposure to CO 2 on the respiratory physiology and production performance of Atlantic salmon ( Salmo salar ) in freshwater ' , Aquaculture , vol. 491 , pp. 20-27 . https://doi.org/10.1016/j.aquaculture.2018.03.010 |
op_relation |
https://orbit.dtu.dk/en/publications/bebb8db1-cad2-474a-9077-a1222d671a61 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.aquaculture.2018.03.010 |
container_title |
Aquaculture |
container_volume |
491 |
container_start_page |
20 |
op_container_end_page |
27 |
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1810432307494912000 |