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Cardiac reflexes in awarming world: thermal plasticity of barostatic control and autonomic tones in a temperate fish

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dc.contributor Univ Gothenburg
dc.contributor Univ Tasmania
dc.contributor Dept Biol
dc.contributor Swedish Univ Agr Sci
dc.contributor Dept Biol & Environm Sci
dc.contributor University Of Gothenburg
dc.contributor Norwegian University Of Science & Technology
dc.contributor Swedish University Of Agricultural Sciences
dc.contributor Norwegian Univ Sci & Technol
dc.contributor Inst Coastal Res
dc.contributor Commonwealth Scientific & Industrial Research Organisation (csiro)
dc.contributor Uppsala University
dc.contributor Dept Anim Ecol
dc.contributor Csiro Agr Flagship
dc.contributor Dept Aquat Resources
dc.contributor University Of Tasmania
dc.contributor Australian Inst Marine Sci
dc.contributor Norwegian University Of Science & Technology (ntnu)
dc.contributor Dept Anim Environm & Hlth
dc.contributor Uppsala Univ
dc.contributor Australian Institute Of Marine Science
dc.contributor Evolutionary Biol Ctr GRANS, ALBIN SANDBLOM, ERIK EKSTROM, ANDREAS BRIJS, JEROEN SUNDSTROM, L. FREDRIK JUTFELT, FREDRIK CLARK, TIMOTHY D. ADILL, ANDERS AHO, TEIJA 2017-03-21T01:05:14Z 2017-03-21T01:05:14Z 2017-01-13T00:48:41Z 2018-11-01T03:11:29Z 2017-03-21T01:05:14Z 2017-01-13T00:48:41Z 2017-01-13T00:48:41Z 2018-11-01T03:11:29Z 2016-09-15
dc.identifier.citation Sandblom E, Ekström A, Brijs J, Sundström LF, Jutfelt F, Clark TD, Adill A, Aho T, Gräns A (2016) Cardiac reflexes in a warming world: thermal plasticity of barostatic control and autonomic tones in a temperate fish. Journal of Experimental Biology 219(18): 2880-2887 en_US
dc.identifier.issn 0022-0949
dc.description.abstract 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 18-19 degrees C with conspecifics from the Biotest enclosure, a chronically heated ecosystem receiving warmed effluent water (24-25 degrees C) 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 (Q(10) = 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 18 degrees C 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.
dc.description.sponsorship This research was funded by the Swedish Research Council (Vetenskapsradet) and the Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning (Svenska Forskningsradet Formas).
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher The Company of Biologists Ltd en_US
dc.relation.ispartof Null
dc.subject Cyprinus-carpio L
dc.subject Autonomic Control
dc.subject Baroreflex
dc.subject Acclimation
dc.subject Tachycardia
dc.subject Biology
dc.subject Rainbow-trout
dc.subject Baroreflex Control
dc.subject Blood Pressure
dc.subject Heart Rate
dc.subject Bradycardia
dc.subject Baroreceptor Control
dc.subject Temperature Acclimation
dc.subject Heart-rate
dc.subject Life Sciences & Biomedicine - Other Topics
dc.subject Perch
dc.subject Circulation
dc.subject Arterial Blood-pressure
dc.subject Oncorhynchus-mykiss
dc.title Cardiac reflexes in awarming world: thermal plasticity of barostatic control and autonomic tones in a temperate fish
dc.type journal article en_US
dc.identifier.doi 10.1242/jeb.140319
dc.identifier.wos WOS:000384250600020

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