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Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish

Acute heat shock has previously been shown to improve subsequent low O(2) (hypoxia) tolerance in an intertidal fish species, a process known as cross-tolerance, but it is not known whether this is a widespread phenomenon. This study examined whether a rock pool specialist, the triplefin fish Bellapi...

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Detalles Bibliográficos
Autores principales: McArley, Tristan J., Hickey, Anthony J. R., Herbert, Neill A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7117701/
https://www.ncbi.nlm.nih.gov/pubmed/32240240
http://dx.doi.org/10.1371/journal.pone.0231091
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author McArley, Tristan J.
Hickey, Anthony J. R.
Herbert, Neill A.
author_facet McArley, Tristan J.
Hickey, Anthony J. R.
Herbert, Neill A.
author_sort McArley, Tristan J.
collection PubMed
description Acute heat shock has previously been shown to improve subsequent low O(2) (hypoxia) tolerance in an intertidal fish species, a process known as cross-tolerance, but it is not known whether this is a widespread phenomenon. This study examined whether a rock pool specialist, the triplefin fish Bellapiscis medius, exhibits heat shock induced cross-tolerance to hypoxia, i.e., longer time to loss of equilibrium (LOE) and lower critical O(2) saturation (S(crit)) after recovering from an acute heat challenge. Non-heat shock controls had a median time to loss of equilibrium (LOE(50)) of 54.4 min under severe hypoxia (7% of air saturation) and a S(crit) of 15.8% air saturation. Contrary to expectations, however, treatments that received an 8 or 10°C heat shock showed a significantly shorter LOE(50) in hypoxia (+8°C = 41.5 min; +10°C = 28.7 min) and no significant change in S(crit) (+8°C = 17.0% air saturation; +10°C = 18.3% of air saturation). Thus, there was no evidence of heat shock induced cross-tolerance to hypoxia in B. medius because exposure to acute heat shock impaired hypoxia tolerance.
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spelling pubmed-71177012020-04-09 Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish McArley, Tristan J. Hickey, Anthony J. R. Herbert, Neill A. PLoS One Research Article Acute heat shock has previously been shown to improve subsequent low O(2) (hypoxia) tolerance in an intertidal fish species, a process known as cross-tolerance, but it is not known whether this is a widespread phenomenon. This study examined whether a rock pool specialist, the triplefin fish Bellapiscis medius, exhibits heat shock induced cross-tolerance to hypoxia, i.e., longer time to loss of equilibrium (LOE) and lower critical O(2) saturation (S(crit)) after recovering from an acute heat challenge. Non-heat shock controls had a median time to loss of equilibrium (LOE(50)) of 54.4 min under severe hypoxia (7% of air saturation) and a S(crit) of 15.8% air saturation. Contrary to expectations, however, treatments that received an 8 or 10°C heat shock showed a significantly shorter LOE(50) in hypoxia (+8°C = 41.5 min; +10°C = 28.7 min) and no significant change in S(crit) (+8°C = 17.0% air saturation; +10°C = 18.3% of air saturation). Thus, there was no evidence of heat shock induced cross-tolerance to hypoxia in B. medius because exposure to acute heat shock impaired hypoxia tolerance. Public Library of Science 2020-04-02 /pmc/articles/PMC7117701/ /pubmed/32240240 http://dx.doi.org/10.1371/journal.pone.0231091 Text en © 2020 McArley et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
McArley, Tristan J.
Hickey, Anthony J. R.
Herbert, Neill A.
Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title_full Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title_fullStr Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title_full_unstemmed Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title_short Acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
title_sort acute high temperature exposure impairs hypoxia tolerance in an intertidal fish
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7117701/
https://www.ncbi.nlm.nih.gov/pubmed/32240240
http://dx.doi.org/10.1371/journal.pone.0231091
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