Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins
Hypoxia is common in aquatic environments and has substantial effects on development, metabolism and survival of aquatic organisms. To understand the physiological effects of hypoxia and its dependence on temperature, metabolic rate (ṀO 2 ) and cardiorespiratory function were studied in response to...
Published in: | Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
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Online Access: | https://doi.org/10.1016/j.cbpa.2017.08.011 http://www.ncbi.nlm.nih.gov/pubmed/28864081 http://ecite.utas.edu.au/122378 |
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ftunivtasecite:oai:ecite.utas.edu.au:122378 2023-05-15T15:32:47+02:00 Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins Polymeropoulos, ET Elliott, NG Frappell, PB 2017 https://doi.org/10.1016/j.cbpa.2017.08.011 http://www.ncbi.nlm.nih.gov/pubmed/28864081 http://ecite.utas.edu.au/122378 en eng Elsevier Science Inc http://dx.doi.org/10.1016/j.cbpa.2017.08.011 Polymeropoulos, ET and Elliott, NG and Frappell, PB, Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins, Comparative Biochemistry and Physiology. Part A, 213 pp. 28-35. ISSN 1095-6433 (2017) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/28864081 http://ecite.utas.edu.au/122378 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1016/j.cbpa.2017.08.011 2019-12-13T22:21:11Z Hypoxia is common in aquatic environments and has substantial effects on development, metabolism and survival of aquatic organisms. To understand the physiological effects of hypoxia and its dependence on temperature, metabolic rate (ṀO 2 ) and cardiorespiratory function were studied in response to acute hypoxia (21 → 5 kPa) at different measurement temperatures (Ta; 4, 8 and 12 C) in Salmo salar alevins that were incubated under normoxic conditions (PO 2 = 21 kPa) or following hypoxic acclimation (PO 2 = 10 kPa) as well as two different temperatures (4 C or 8 C). Hypoxic acclimation lead to a developmental delay manifested through slower yolk absorption. The general response to acute hypoxia was metabolic depression (~ 60%). Hypoxia acclimated alevins had higher ṀO 2 s when measured in normoxia than alevins acclimated to normoxia. ṀO 2 s were elevated to the same degree (~ 30% per 4 C change) irrespective of Ta. Under severe, acute hypoxia (~ 5 kPa) and irrespective of Ta or acclimation, ṀO 2 s were similar between most groups. This suggests that despite different acclimation regimes, O 2 transport was limited to the same degree. While cardiorespiratory function (heart-, ventilation rate) was unchanged in response to acute hypoxia after normoxic acclimation, hypoxic acclimation led to cardiorespiratory changes predominantly in severe hypoxia, indicating earlier onset and plasticity of cardiorespiratory control mechanisms. Although ṀO 2 in normoxia was higher after hypoxic acclimation, at the respective acclimation PO 2 , ṀO 2 was similar in normoxia and hypoxia acclimated alevins. This is indicative of metabolic compensation to an intrinsic ṀO2 at the acclimation condition in hypoxia-acclimated alevins after re-exposure to normoxia. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology 213 28 35 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
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Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Polymeropoulos, ET Elliott, NG Frappell, PB Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
Hypoxia is common in aquatic environments and has substantial effects on development, metabolism and survival of aquatic organisms. To understand the physiological effects of hypoxia and its dependence on temperature, metabolic rate (ṀO 2 ) and cardiorespiratory function were studied in response to acute hypoxia (21 → 5 kPa) at different measurement temperatures (Ta; 4, 8 and 12 C) in Salmo salar alevins that were incubated under normoxic conditions (PO 2 = 21 kPa) or following hypoxic acclimation (PO 2 = 10 kPa) as well as two different temperatures (4 C or 8 C). Hypoxic acclimation lead to a developmental delay manifested through slower yolk absorption. The general response to acute hypoxia was metabolic depression (~ 60%). Hypoxia acclimated alevins had higher ṀO 2 s when measured in normoxia than alevins acclimated to normoxia. ṀO 2 s were elevated to the same degree (~ 30% per 4 C change) irrespective of Ta. Under severe, acute hypoxia (~ 5 kPa) and irrespective of Ta or acclimation, ṀO 2 s were similar between most groups. This suggests that despite different acclimation regimes, O 2 transport was limited to the same degree. While cardiorespiratory function (heart-, ventilation rate) was unchanged in response to acute hypoxia after normoxic acclimation, hypoxic acclimation led to cardiorespiratory changes predominantly in severe hypoxia, indicating earlier onset and plasticity of cardiorespiratory control mechanisms. Although ṀO 2 in normoxia was higher after hypoxic acclimation, at the respective acclimation PO 2 , ṀO 2 was similar in normoxia and hypoxia acclimated alevins. This is indicative of metabolic compensation to an intrinsic ṀO2 at the acclimation condition in hypoxia-acclimated alevins after re-exposure to normoxia. |
format |
Article in Journal/Newspaper |
author |
Polymeropoulos, ET Elliott, NG Frappell, PB |
author_facet |
Polymeropoulos, ET Elliott, NG Frappell, PB |
author_sort |
Polymeropoulos, ET |
title |
Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
title_short |
Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
title_full |
Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
title_fullStr |
Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
title_full_unstemmed |
Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins |
title_sort |
hypoxic acclimation leads to metabolic compensation after reoxygenation in atlantic salmon yolk-sac alevins |
publisher |
Elsevier Science Inc |
publishDate |
2017 |
url |
https://doi.org/10.1016/j.cbpa.2017.08.011 http://www.ncbi.nlm.nih.gov/pubmed/28864081 http://ecite.utas.edu.au/122378 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.1016/j.cbpa.2017.08.011 Polymeropoulos, ET and Elliott, NG and Frappell, PB, Hypoxic acclimation leads to metabolic compensation after reoxygenation in Atlantic salmon yolk-sac alevins, Comparative Biochemistry and Physiology. Part A, 213 pp. 28-35. ISSN 1095-6433 (2017) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/28864081 http://ecite.utas.edu.au/122378 |
op_doi |
https://doi.org/10.1016/j.cbpa.2017.08.011 |
container_title |
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology |
container_volume |
213 |
container_start_page |
28 |
op_container_end_page |
35 |
_version_ |
1766363271441416192 |