Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod
Physiological mechanisms determining thermal limits in fishes are debated but remain elusive. It has been hypothesised that motor function loss, observed as loss of equilibrium during acute warming, is due to direct thermal effects on brain neuronal function. To test this, we mounted cooling plates...
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ftdeakinunifig:oai:figshare.com:article/20739280 2024-06-23T07:51:03+00:00 Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod F Jutfelt DG Roche Timothy Clark T Norin SA Binning B Speers-Roesch M Amcoff R Morgan AH Andreassen J Sundin 2019-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30130494 https://figshare.com/articles/journal_contribution/Brain_cooling_marginally_increases_acute_upper_thermal_tolerance_in_Atlantic_cod/20739280 unknown http://hdl.handle.net/10536/DRO/DU:30130494 https://figshare.com/articles/journal_contribution/Brain_cooling_marginally_increases_acute_upper_thermal_tolerance_in_Atlantic_cod/20739280 All Rights Reserved Fisheries sciences not elsewhere classified Science & Technology Life Sciences & Biomedicine Biology Life Sciences & Biomedicine - Other Topics Climate change Fish Global warming Oxygen- and capacity-limited thermal tolerance OCLTT Critical thermal maximum CTmax Loss of equilibrium LOE Thermal ramping OXYGEN LIMITATION TEMPERATURE FISHES BEHAVIOR MAXIMUM 3103 Ecology 3109 Zoology Text Journal contribution 2019 ftdeakinunifig 2024-06-06T01:30:02Z Physiological mechanisms determining thermal limits in fishes are debated but remain elusive. It has been hypothesised that motor function loss, observed as loss of equilibrium during acute warming, is due to direct thermal effects on brain neuronal function. To test this, we mounted cooling plates on the heads of Atlantic cod (Gadus morhua) and quantified whether local brain cooling increased whole-organism acute upper thermal tolerance. Brain cooling reduced brain temperature by 2-6°C below ambient water and increased thermal tolerance by 0.5 and 0.6°C on average relative to instrumented and uninstrumented controls, respectively, suggesting that direct thermal effects on brain neurons may contribute to setting upper thermal limits in fish. However, the improvement in thermal tolerance with brain cooling was small relative to the difference in brain temperature, demonstrating that other mechanisms (e.g., failure of spinal and peripheral neurons, or muscle) may also contribute to controlling acute thermal tolerance. Article in Journal/Newspaper atlantic cod Gadus morhua DRO - Deakin Research Online |
institution |
Open Polar |
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DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Fisheries sciences not elsewhere classified Science & Technology Life Sciences & Biomedicine Biology Life Sciences & Biomedicine - Other Topics Climate change Fish Global warming Oxygen- and capacity-limited thermal tolerance OCLTT Critical thermal maximum CTmax Loss of equilibrium LOE Thermal ramping OXYGEN LIMITATION TEMPERATURE FISHES BEHAVIOR MAXIMUM 3103 Ecology 3109 Zoology |
spellingShingle |
Fisheries sciences not elsewhere classified Science & Technology Life Sciences & Biomedicine Biology Life Sciences & Biomedicine - Other Topics Climate change Fish Global warming Oxygen- and capacity-limited thermal tolerance OCLTT Critical thermal maximum CTmax Loss of equilibrium LOE Thermal ramping OXYGEN LIMITATION TEMPERATURE FISHES BEHAVIOR MAXIMUM 3103 Ecology 3109 Zoology F Jutfelt DG Roche Timothy Clark T Norin SA Binning B Speers-Roesch M Amcoff R Morgan AH Andreassen J Sundin Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
topic_facet |
Fisheries sciences not elsewhere classified Science & Technology Life Sciences & Biomedicine Biology Life Sciences & Biomedicine - Other Topics Climate change Fish Global warming Oxygen- and capacity-limited thermal tolerance OCLTT Critical thermal maximum CTmax Loss of equilibrium LOE Thermal ramping OXYGEN LIMITATION TEMPERATURE FISHES BEHAVIOR MAXIMUM 3103 Ecology 3109 Zoology |
description |
Physiological mechanisms determining thermal limits in fishes are debated but remain elusive. It has been hypothesised that motor function loss, observed as loss of equilibrium during acute warming, is due to direct thermal effects on brain neuronal function. To test this, we mounted cooling plates on the heads of Atlantic cod (Gadus morhua) and quantified whether local brain cooling increased whole-organism acute upper thermal tolerance. Brain cooling reduced brain temperature by 2-6°C below ambient water and increased thermal tolerance by 0.5 and 0.6°C on average relative to instrumented and uninstrumented controls, respectively, suggesting that direct thermal effects on brain neurons may contribute to setting upper thermal limits in fish. However, the improvement in thermal tolerance with brain cooling was small relative to the difference in brain temperature, demonstrating that other mechanisms (e.g., failure of spinal and peripheral neurons, or muscle) may also contribute to controlling acute thermal tolerance. |
format |
Article in Journal/Newspaper |
author |
F Jutfelt DG Roche Timothy Clark T Norin SA Binning B Speers-Roesch M Amcoff R Morgan AH Andreassen J Sundin |
author_facet |
F Jutfelt DG Roche Timothy Clark T Norin SA Binning B Speers-Roesch M Amcoff R Morgan AH Andreassen J Sundin |
author_sort |
F Jutfelt |
title |
Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
title_short |
Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
title_full |
Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
title_fullStr |
Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
title_full_unstemmed |
Brain cooling marginally increases acute upper thermal tolerance in Atlantic cod |
title_sort |
brain cooling marginally increases acute upper thermal tolerance in atlantic cod |
publishDate |
2019 |
url |
http://hdl.handle.net/10536/DRO/DU:30130494 https://figshare.com/articles/journal_contribution/Brain_cooling_marginally_increases_acute_upper_thermal_tolerance_in_Atlantic_cod/20739280 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30130494 https://figshare.com/articles/journal_contribution/Brain_cooling_marginally_increases_acute_upper_thermal_tolerance_in_Atlantic_cod/20739280 |
op_rights |
All Rights Reserved |
_version_ |
1802642053152112640 |