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Cardiac reflexes in...
Cardiac reflexes in awarming world: Thermal plasticity of barostatic control and autonomic tones in a temperate fish
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- Sandblom, Erik, 1978 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, Box 463, S-40530 Gothenburg, Sweden.
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- Ekström, Andreas, 1979 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, Box 463, S-40530 Gothenburg, Sweden.
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- Brijs, Jeroen (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Univ Gothenburg, Dept Biol & Environm Sci, Box 463, S-40530 Gothenburg, Sweden.,University of Gothenburg
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- Sundström, L. Fredrik (author)
- Uppsala universitet,Zooekologi
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- Jutfelt, F. (author)
- Norwegian Univ Sci & Technol, Dept Biol, NO-7491 Trondheim, Norway.
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- Clark, T. D. (author)
- Australian Inst Marine Sci, Townsville, Qld 4810, Australia.;Univ Tasmania, Hobart, Tas 7000, Australia.;CSIRO Agr Flagship, Hobart, Tas 7000, Australia.
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- Adill, Anders (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources
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- Aho, Teija (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources
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- Gräns, Albin (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för husdjurens miljö och hälsa (HMH),Department of Animal Environment and Health
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(creator_code:org_t)
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- The Company of Biologists, 2016
- 2016
- English.
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In: Journal of Experimental Biology. - : The Company of Biologists. - 0022-0949 .- 1477-9145. ; 219:18, s. 2880-2887
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Abstract
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- Thermal plasticity of cardiorespiratory function allows ectotherms like fish to cope with seasonal temperature changes and is critical for resilience to climate change. Yet, the chronic thermal effects on cardiovascular homeostatic reflexes in fish are little understood although this may have important implications for physiological performance and overall resilience to climate warming.We compared cardiac autonomic control and baroreflex regulation of heart rate in perch (Perca fluviatilis L.) from a reference area in the Baltic Sea at 18-19C with conspecifics from the Biotest enclosure, a chronically heated ecosystem receiving warmed effluent water (24-25C) from a nuclear power plant. Resting heart rate of Biotest fish displayed clear thermal compensation and was 58.3±2.3 beats min-1 compared with 52.4±2.6 beats min-1 in reference fish at their respective environmental temperatures (Q10=1.2). The thermally compensated heart rate of Biotest fish was a combined effect of elevated inhibitory cholinergic tone (105% in Biotest fish versus 70% in reference fish) and reduced intrinsic cardiac pacemaker rate. A barostatic response was evident in both groups, as pharmacologically induced increases and decreases in blood pressure resulted in atropine-sensitive bradycardia and tachycardia, respectively. Yet, the tachycardia in Biotest fish was significantly greater, presumably due to the larger scope for vagal release. Acclimation of Biotest fish to 18C for 3 weeks abolished differences in intrinsic heart rate and autonomic tone, suggesting considerable short-term thermal plasticity of cardiovascular control in this species. The heightened hypotensive tachycardia in Biotest perch may represent an important mechanism of ectothermic vertebrates that safeguards tissue perfusion pressure when tissue oxygen demand is elevated by environmental warming. © 2016. Published by The Company of Biologists Ltd.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Fisk- och akvakulturforskning (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Fish and Aquacultural Science (hsv//eng)
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- Autonomic control
- Baroreflex
- Blood pressure
- Bradycardia
- Heart rate
- Tachycardia
- Temperature acclimation
- Autonomic control
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Sandblom, Erik, ...
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Ekström, Andreas ...
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Brijs, Jeroen
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Sundström, L. Fr ...
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Jutfelt, F.
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Clark, T. D.
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Adill, Anders
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Aho, Teija
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Gräns, Albin
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- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Physiology
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Fish and Aquacul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Zoology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
- Articles in the publication
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Journal of Exper ...
- By the university
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University of Gothenburg
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Uppsala University
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Swedish University of Agricultural Sciences