CO2 induced seawater acidification impacts survival and development of European eel embryos
Fish embryos may be vulnerable to seawater acidification resulting from anthropogenic carbon dioxide (CO 2 ) emissions or from excessive biological CO 2 production in aquaculture systems. This study investigated CO 2 effects on embryos of the European eel ( Anguilla anguilla ), a catadromous fish th...
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crplos:10.1371/journal.pone.0267228 2024-05-19T07:28:35+00:00 CO2 induced seawater acidification impacts survival and development of European eel embryos Sganga, Daniela E. Dahlke, Flemming T. Sørensen, Sune R. Butts, Ian A. E. Tomkiewicz, Jonna Mazurais, David Servili, Arianna Bertolini, Francesca Politis, Sebastian N. Dam, Hans G. 2022 http://dx.doi.org/10.1371/journal.pone.0267228 https://dx.plos.org/10.1371/journal.pone.0267228 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 17, issue 4, page e0267228 ISSN 1932-6203 journal-article 2022 crplos https://doi.org/10.1371/journal.pone.0267228 2024-05-01T06:56:49Z Fish embryos may be vulnerable to seawater acidification resulting from anthropogenic carbon dioxide (CO 2 ) emissions or from excessive biological CO 2 production in aquaculture systems. This study investigated CO 2 effects on embryos of the European eel ( Anguilla anguilla ), a catadromous fish that is considered at risk from climate change and that is targeted for hatchery production to sustain aquaculture of the species. Eel embryos were reared in three independent recirculation systems with different pH/CO 2 levels representing “control” (pH 8.1, 300 μatm CO 2 ), end-of-century climate change (“intermediate”, pH 7.6, 900 μatm CO 2 ) and “extreme” aquaculture conditions (pH 7.1, 3000 μatm CO 2 ). Sensitivity analyses were conducted at 4, 24, and 48 hours post-fertilization (hpf) by focusing on development, survival, and expression of genes related to acute stress response ( crhr1 , crfr2 ), stress/repair response ( hsp70 , hsp90 ), water and solute transport ( aqp1 , aqp3 ), acid-base regulation ( nkcc1a , ncc , car15 ), and inhibitory neurotransmission ( GABAAα6b , Gabra1 ). Results revealed that embryos developing at intermediate pH showed similar survival rates to the control, but egg swelling was impaired, resulting in a reduction in egg size with decreasing pH. Embryos exposed to extreme pH had 0.6-fold decrease in survival at 24 hpf and a 0.3-fold change at 48 compared to the control. These observed effects of acidification were not reflected by changes in expression of any of the here studied genes. On the contrary, differential expression was observed along embryonic development independent of treatment, indicating that the underlying regulating systems are under development and that embryos are limited in their ability to regulate molecular responses to acidification. In conclusion, exposure to predicted end-of-century ocean pCO 2 conditions may affect normal development of this species in nature during sensitive early life history stages with limited physiological response capacities, while extreme ... Article in Journal/Newspaper Anguilla anguilla European eel PLOS PLOS ONE 17 4 e0267228 |
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PLOS |
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language |
English |
description |
Fish embryos may be vulnerable to seawater acidification resulting from anthropogenic carbon dioxide (CO 2 ) emissions or from excessive biological CO 2 production in aquaculture systems. This study investigated CO 2 effects on embryos of the European eel ( Anguilla anguilla ), a catadromous fish that is considered at risk from climate change and that is targeted for hatchery production to sustain aquaculture of the species. Eel embryos were reared in three independent recirculation systems with different pH/CO 2 levels representing “control” (pH 8.1, 300 μatm CO 2 ), end-of-century climate change (“intermediate”, pH 7.6, 900 μatm CO 2 ) and “extreme” aquaculture conditions (pH 7.1, 3000 μatm CO 2 ). Sensitivity analyses were conducted at 4, 24, and 48 hours post-fertilization (hpf) by focusing on development, survival, and expression of genes related to acute stress response ( crhr1 , crfr2 ), stress/repair response ( hsp70 , hsp90 ), water and solute transport ( aqp1 , aqp3 ), acid-base regulation ( nkcc1a , ncc , car15 ), and inhibitory neurotransmission ( GABAAα6b , Gabra1 ). Results revealed that embryos developing at intermediate pH showed similar survival rates to the control, but egg swelling was impaired, resulting in a reduction in egg size with decreasing pH. Embryos exposed to extreme pH had 0.6-fold decrease in survival at 24 hpf and a 0.3-fold change at 48 compared to the control. These observed effects of acidification were not reflected by changes in expression of any of the here studied genes. On the contrary, differential expression was observed along embryonic development independent of treatment, indicating that the underlying regulating systems are under development and that embryos are limited in their ability to regulate molecular responses to acidification. In conclusion, exposure to predicted end-of-century ocean pCO 2 conditions may affect normal development of this species in nature during sensitive early life history stages with limited physiological response capacities, while extreme ... |
author2 |
Dam, Hans G. |
format |
Article in Journal/Newspaper |
author |
Sganga, Daniela E. Dahlke, Flemming T. Sørensen, Sune R. Butts, Ian A. E. Tomkiewicz, Jonna Mazurais, David Servili, Arianna Bertolini, Francesca Politis, Sebastian N. |
spellingShingle |
Sganga, Daniela E. Dahlke, Flemming T. Sørensen, Sune R. Butts, Ian A. E. Tomkiewicz, Jonna Mazurais, David Servili, Arianna Bertolini, Francesca Politis, Sebastian N. CO2 induced seawater acidification impacts survival and development of European eel embryos |
author_facet |
Sganga, Daniela E. Dahlke, Flemming T. Sørensen, Sune R. Butts, Ian A. E. Tomkiewicz, Jonna Mazurais, David Servili, Arianna Bertolini, Francesca Politis, Sebastian N. |
author_sort |
Sganga, Daniela E. |
title |
CO2 induced seawater acidification impacts survival and development of European eel embryos |
title_short |
CO2 induced seawater acidification impacts survival and development of European eel embryos |
title_full |
CO2 induced seawater acidification impacts survival and development of European eel embryos |
title_fullStr |
CO2 induced seawater acidification impacts survival and development of European eel embryos |
title_full_unstemmed |
CO2 induced seawater acidification impacts survival and development of European eel embryos |
title_sort |
co2 induced seawater acidification impacts survival and development of european eel embryos |
publisher |
Public Library of Science (PLoS) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1371/journal.pone.0267228 https://dx.plos.org/10.1371/journal.pone.0267228 |
genre |
Anguilla anguilla European eel |
genre_facet |
Anguilla anguilla European eel |
op_source |
PLOS ONE volume 17, issue 4, page e0267228 ISSN 1932-6203 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0267228 |
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PLOS ONE |
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17 |
container_issue |
4 |
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e0267228 |
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1799474705737973760 |