A multi-scaling approach showing a transient metabolic mismatch in a freshwater fish (Zingel asper) during an acute heat stress
(2025) In Journal of Experimental Biology 228(10).- Abstract
Heat stress events will be more frequent and intense in the future. These events will challenge the capacity of organisms to exhibit sufficient metabolic flexibility to adapt to such variations. To better understand the acclimation processes implemented in response to acute warming, with an integrative approach we examined in vivo metabolic rate and cardiac mitochondrial respiration in the Rhône streber, during and after a heat stress on a precise time line. The temperature was raised from 13°C to 18°C (+1°C per hour) and maintained at 18°C for 5 days, before returning to 13°C at the same rate. We repeatedly measured, during the heat stress and 5 days after the end of the event, in vivo metabolic rate in the same individuals and cardiac... (More)
Heat stress events will be more frequent and intense in the future. These events will challenge the capacity of organisms to exhibit sufficient metabolic flexibility to adapt to such variations. To better understand the acclimation processes implemented in response to acute warming, with an integrative approach we examined in vivo metabolic rate and cardiac mitochondrial respiration in the Rhône streber, during and after a heat stress on a precise time line. The temperature was raised from 13°C to 18°C (+1°C per hour) and maintained at 18°C for 5 days, before returning to 13°C at the same rate. We repeatedly measured, during the heat stress and 5 days after the end of the event, in vivo metabolic rate in the same individuals and cardiac mitochondrial respiration from different individuals. At the organismal level, oxygen consumption increased in line with warming, and was followed by a return to pre-acclimated levels just after the end of the heat stress. Conversely, cardiac mitochondrial respiration decreased during the heat stress, especially 24 h in, and recovered at the end of the event. Our results suggest that the heat stress was responsible for a metabolic mismatch in the strebers. Indeed, we observed (i) a strong thermodynamic effect without any acclimation process, suggesting that the range of temperatures chosen was not stressful for the fish, and (ii) the establishment of a transitory energy saving process. Our results underline the need for more integrative studies to understand how organisms will adapt to climate change.
(Less)
- author
- organization
- publishing date
- 2025-05
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Acute warming, Ectotherms, Heart, Metabolic rate, Mitochondrial respiration, Oxygen consumption
- in
- Journal of Experimental Biology
- volume
- 228
- issue
- 10
- article number
- jeb250202
- publisher
- The Company of Biologists Ltd
- external identifiers
-
- pmid:40309901
- scopus:105007178723
- ISSN
- 0022-0949
- DOI
- 10.1242/jeb.250202
- language
- English
- LU publication?
- yes
- id
- 194193f4-d9cb-4d6e-a0a4-c8e0453afb8a
- date added to LUP
- 2025-08-05 10:31:12
- date last changed
- 2025-08-05 10:31:26
@article{194193f4-d9cb-4d6e-a0a4-c8e0453afb8a,
abstract = {{<p>Heat stress events will be more frequent and intense in the future. These events will challenge the capacity of organisms to exhibit sufficient metabolic flexibility to adapt to such variations. To better understand the acclimation processes implemented in response to acute warming, with an integrative approach we examined in vivo metabolic rate and cardiac mitochondrial respiration in the Rhône streber, during and after a heat stress on a precise time line. The temperature was raised from 13°C to 18°C (+1°C per hour) and maintained at 18°C for 5 days, before returning to 13°C at the same rate. We repeatedly measured, during the heat stress and 5 days after the end of the event, in vivo metabolic rate in the same individuals and cardiac mitochondrial respiration from different individuals. At the organismal level, oxygen consumption increased in line with warming, and was followed by a return to pre-acclimated levels just after the end of the heat stress. Conversely, cardiac mitochondrial respiration decreased during the heat stress, especially 24 h in, and recovered at the end of the event. Our results suggest that the heat stress was responsible for a metabolic mismatch in the strebers. Indeed, we observed (i) a strong thermodynamic effect without any acclimation process, suggesting that the range of temperatures chosen was not stressful for the fish, and (ii) the establishment of a transitory energy saving process. Our results underline the need for more integrative studies to understand how organisms will adapt to climate change.</p>}},
author = {{Watson, Julia and Souques, Chloé and Dechaume-Moncharmont, François Xavier and Roussel, Damien and Le Guyader, Julie and Lassus, Rémy and Guillard, Ludovic and Clair, Angeline and Averty, Laétitia and Bastianini, Candice and Redon, Lilian and Morales-Montaron, Anne and Voituron, Yann and Daufresne, Martin and Thoral, Elisa and Teulier, Loïc}},
issn = {{0022-0949}},
keywords = {{Acute warming; Ectotherms; Heart; Metabolic rate; Mitochondrial respiration; Oxygen consumption}},
language = {{eng}},
number = {{10}},
publisher = {{The Company of Biologists Ltd}},
series = {{Journal of Experimental Biology}},
title = {{A multi-scaling approach showing a transient metabolic mismatch in a freshwater fish (Zingel asper) during an acute heat stress}},
url = {{http://dx.doi.org/10.1242/jeb.250202}},
doi = {{10.1242/jeb.250202}},
volume = {{228}},
year = {{2025}},
}