Implications of chronic hypoxia during development in red drum.
Respiratory plasticity is a beneficial response to chronic hypoxia in fish. Red drum, a teleost that commonly experiences hypoxia in the Gulf of Mexico, have shown respiratory plasticity following sublethal hypoxia exposure as juveniles, but implications of hypoxia exposure during development are un...
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Online Access: | https://doi.org/10.1242/jeb.247618 https://pubmed.ncbi.nlm.nih.gov/39092456 |
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ftpubmed:39092456 2024-09-30T14:41:50+00:00 Implications of chronic hypoxia during development in red drum. Negrete, Benjamin Ackerly, Kerri Lynn Esbaugh, Andrew J 2024 Aug 15 https://doi.org/10.1242/jeb.247618 https://pubmed.ncbi.nlm.nih.gov/39092456 eng eng Silverchair Information Systems https://doi.org/10.1242/jeb.247618 https://pubmed.ncbi.nlm.nih.gov/39092456 © 2024. Published by The Company of Biologists Ltd. J Exp Biol ISSN:1477-9145 Volume:227 Issue:16 Metabolic rate Oxygen Phenotypic plasticity Respiratory physiology Swim performance Journal Article 2024 ftpubmed https://doi.org/10.1242/jeb.247618 2024-08-31T16:02:00Z Respiratory plasticity is a beneficial response to chronic hypoxia in fish. Red drum, a teleost that commonly experiences hypoxia in the Gulf of Mexico, have shown respiratory plasticity following sublethal hypoxia exposure as juveniles, but implications of hypoxia exposure during development are unknown. We exposed red drum embryos to hypoxia (40% air saturation) or normoxia (100% air saturation) for 3 days post fertilization (dpf). This time frame encompasses hatch and exogenous feeding. At 3 dpf, there was no difference in survival or changes in size. After the 3-day hypoxia exposure, all larvae were moved and reared in common normoxic conditions. Fish were reared for ∼3 months and effects of the developmental hypoxia exposure on swim performance and whole-animal aerobic metabolism were measured. We used a cross design wherein fish from normoxia (N=24) were exercised in swim tunnels in both hypoxia (40%, n=12) and normoxia (100%, n=12) conditions, and likewise for hypoxia-exposed fish (n=10 in each group). Oxygen consumption, critical swim speed (Ucrit), critical oxygen threshold (Pcrit) and mitochondrial respiration were measured. Hypoxia-exposed fish had higher aerobic scope, maximum metabolic rate, and higher liver mitochondrial efficiency relative to control fish in normoxia. Interestingly, hypoxia-exposed fish showed increased hypoxia sensitivity (higher Pcrit) and recruited burst swimming at lower swim speeds relative to control fish. These data provide evidence that early hypoxia exposure leads to a complex response in later life. Article in Journal/Newspaper Red drum PubMed Central (PMC) Journal of Experimental Biology 227 16 |
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PubMed Central (PMC) |
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language |
English |
topic |
Metabolic rate Oxygen Phenotypic plasticity Respiratory physiology Swim performance |
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Metabolic rate Oxygen Phenotypic plasticity Respiratory physiology Swim performance Negrete, Benjamin Ackerly, Kerri Lynn Esbaugh, Andrew J Implications of chronic hypoxia during development in red drum. |
topic_facet |
Metabolic rate Oxygen Phenotypic plasticity Respiratory physiology Swim performance |
description |
Respiratory plasticity is a beneficial response to chronic hypoxia in fish. Red drum, a teleost that commonly experiences hypoxia in the Gulf of Mexico, have shown respiratory plasticity following sublethal hypoxia exposure as juveniles, but implications of hypoxia exposure during development are unknown. We exposed red drum embryos to hypoxia (40% air saturation) or normoxia (100% air saturation) for 3 days post fertilization (dpf). This time frame encompasses hatch and exogenous feeding. At 3 dpf, there was no difference in survival or changes in size. After the 3-day hypoxia exposure, all larvae were moved and reared in common normoxic conditions. Fish were reared for ∼3 months and effects of the developmental hypoxia exposure on swim performance and whole-animal aerobic metabolism were measured. We used a cross design wherein fish from normoxia (N=24) were exercised in swim tunnels in both hypoxia (40%, n=12) and normoxia (100%, n=12) conditions, and likewise for hypoxia-exposed fish (n=10 in each group). Oxygen consumption, critical swim speed (Ucrit), critical oxygen threshold (Pcrit) and mitochondrial respiration were measured. Hypoxia-exposed fish had higher aerobic scope, maximum metabolic rate, and higher liver mitochondrial efficiency relative to control fish in normoxia. Interestingly, hypoxia-exposed fish showed increased hypoxia sensitivity (higher Pcrit) and recruited burst swimming at lower swim speeds relative to control fish. These data provide evidence that early hypoxia exposure leads to a complex response in later life. |
format |
Article in Journal/Newspaper |
author |
Negrete, Benjamin Ackerly, Kerri Lynn Esbaugh, Andrew J |
author_facet |
Negrete, Benjamin Ackerly, Kerri Lynn Esbaugh, Andrew J |
author_sort |
Negrete, Benjamin |
title |
Implications of chronic hypoxia during development in red drum. |
title_short |
Implications of chronic hypoxia during development in red drum. |
title_full |
Implications of chronic hypoxia during development in red drum. |
title_fullStr |
Implications of chronic hypoxia during development in red drum. |
title_full_unstemmed |
Implications of chronic hypoxia during development in red drum. |
title_sort |
implications of chronic hypoxia during development in red drum. |
publisher |
Silverchair Information Systems |
publishDate |
2024 |
url |
https://doi.org/10.1242/jeb.247618 https://pubmed.ncbi.nlm.nih.gov/39092456 |
genre |
Red drum |
genre_facet |
Red drum |
op_source |
J Exp Biol ISSN:1477-9145 Volume:227 Issue:16 |
op_relation |
https://doi.org/10.1242/jeb.247618 https://pubmed.ncbi.nlm.nih.gov/39092456 |
op_rights |
© 2024. Published by The Company of Biologists Ltd. |
op_doi |
https://doi.org/10.1242/jeb.247618 |
container_title |
Journal of Experimental Biology |
container_volume |
227 |
container_issue |
16 |
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1811644237401292800 |