| Autonomic regulation of the heart during digestion and aerobic swimming in the European sea bass (Dicentrarchus labrax). | |
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MedLine Citation:
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PMID: 20362690 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The autonomic regulation of the heart was studied in European sea bass (Dicentrarchus labrax) during digestion and aerobic exercise by measuring cardiac output (Q), heart rate (f(H)), stroke volume (V(s)) and oxygen consumption (MO(2)) before and after pharmacological blockade by intraperitoneal injections of atropine and propranolol. The significant rise in MO(2) (134+/-14 to 174+/-14 mg kg(-)(1)h(-)(1)) 6h after feeding (3% body mass) caused a significant tachycardia (47.7+/-10.9 to 72.6+/-7.2 beats min(-)(1)), but only a small elevation of Q. MO(2) of fasting fish increased progressively with swimming speed (0.7-2.1BLs(-)(1)) causing a significant tachycardia (43+/-6 to 61+/-4 mL min(-)(1)kg(-)(1)) and increased Q but V(s) did not change. Inactive fish were characterized by a high vagal tone (98.3+/-21.7%), and the tachycardia during digestion and exercise was exclusively due to a reduction of vagal tone, while the adrenergic tone remained low during all conditions. Intrinsic f(H), revealed after double autonomic blockade, was not affected by digestion (71+/-4 and 70+/-6 min(-)(1), respectively), indicating that non-adrenergic, non-cholinergic (NANC) factors do not contribute to the tachycardia during digestion in sea bass. |
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Authors:
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Nina K Iversen; Aurélie Dupont-Prinet; Inge Findorf; David J McKenzie; Tobias Wang |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-04-01 |
Journal Detail:
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Title: Comparative biochemistry and physiology. Part A, Molecular & integrative physiology Volume: 156 ISSN: 1531-4332 ISO Abbreviation: Comp. Biochem. Physiol., Part A Mol. Integr. Physiol. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-06-23 Completed Date: 2011-01-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9806096 Medline TA: Comp Biochem Physiol A Mol Integr Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 463-8 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Zoophysiology, Department of Biological Sciences, University of Aarhus, Denmark. nina.iversen@biology.au.dk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Physiological
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drug effects,
physiology Animals Atropine / administration & dosage Autonomic Nervous System / drug effects, physiology* Bass / physiology* Cardiac Output / drug effects, physiology Digestion / drug effects, physiology* Fasting Heart / drug effects, innervation*, physiology* Heart Rate / drug effects, physiology Oxygen Consumption / drug effects, physiology Physical Conditioning, Animal / physiology Propranolol / administration & dosage Swimming / physiology* |
| Chemical | |
Reg. No./Substance:
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51-55-8/Atropine; 525-66-6/Propranolol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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