Aspects of cardioventilatory control in the adriatic sturgeon (Acipenser naccarii)
Identifieur interne : 000599 ( PascalFrancis/Curation ); précédent : 000598; suivant : 000600Aspects of cardioventilatory control in the adriatic sturgeon (Acipenser naccarii)
Auteurs : D. J. Mckenzie [Royaume-Uni] ; E. W. Taylor [Royaume-Uni] ; P. Bronzi ; C. L. BolisSource :
- Respiration physiology [ 0034-5687 ] ; 1995.
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- Pascal (Inist)
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Abstract
Cardioventilatory responses to hypoxia, the O2 chemoreceptor stimulant sodium cyanide (NaCN), and intra-arterial injection of atropine, noradrenaline and DL-propranolol were investigated in the adriatic sturgeon. Hypoxia elicited a bradycardia and hyperventilation. 1 mg NaCN added to water entering the buccal cavity stimulated a transient bradycardia but intra-arterial infusion of 150 μg NaCN did not, indicating that hypoxic bradycardia is controlled by chemoreceptors sensitive only to water O2 levels. NaCN stimulated hyperventilation both when added to the water and when infused intra-arterially, indicating that hypoxic hyperventilation is controlled by chemoreceptors sensitive to both internal and external milieux. Atropine abolished the hypoxic bradycardia and returned heart rate to normoxic values indicating that this species has no inhibitory vagal tone in normoxia. Noradrenaline stimulated ventilation, an effect abolished by DL-propranolol. Propranolol blocked ventilatory responses to intra-arterial infusion of NaCN whereas responses to NaCN added to the water remained unaffected, indicating that propranolol may inhibit internally-oriented O2-chemoreceptor activity or that ventilatory responses to intra-arterial NaCN are stimulated by a release of circulating catecholamines. Cardioventilatory control systems in sturgeon are similar to those of other actinopterygians but also show some characteristics of the system described for elasmobranchs
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Aspects of cardioventilatory control in the adriatic sturgeon (Acipenser naccarii)</title><author><name sortKey="Mckenzie, D J" sort="Mckenzie, D J" uniqKey="Mckenzie D" first="D. J." last="Mckenzie">D. J. Mckenzie</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Univ. Birmingham, school biological sci.</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Taylor, E W" sort="Taylor, E W" uniqKey="Taylor E" first="E. W." last="Taylor">E. W. Taylor</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Univ. Birmingham, school biological sci.</s1><s2>Birmingham B15 2TT</s2><s3>GBR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country></affiliation></author><author><name sortKey="Bronzi, P" sort="Bronzi, P" uniqKey="Bronzi P" first="P." last="Bronzi">P. Bronzi</name></author><author><name sortKey="Bolis, C L" sort="Bolis, C L" uniqKey="Bolis C" first="C. L." last="Bolis">C. L. Bolis</name></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">95-0231347</idno><date when="1995">1995</date><idno type="stanalyst">PASCAL 95-0231347 INIST</idno><idno type="RBID">Pascal:95-0231347</idno><idno type="wicri:Area/PascalFrancis/Corpus">000512</idno><idno type="wicri:Area/PascalFrancis/Curation">000599</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Aspects of cardioventilatory control in the adriatic sturgeon (Acipenser naccarii)</title><author><name sortKey="Mckenzie, D J" sort="Mckenzie, D J" uniqKey="Mckenzie D" first="D. J." last="Mckenzie">D. J. Mckenzie</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Univ. 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Bolis</name></author></analytic><series><title level="j" type="main">Respiration physiology</title><title level="j" type="abbreviated">Respir. physiol.</title><idno type="ISSN">0034-5687</idno><imprint><date when="1995">1995</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Respiration physiology</title><title level="j" type="abbreviated">Respir. physiol.</title><idno type="ISSN">0034-5687</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cardiorespiratory control</term><term>Chemoreception</term><term>Chemoreceptor</term><term>Heart rate</term><term>Hypoxia</term><term>Pisces</term><term>Pulmonary ventilation</term><term>Respiratory control</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Hypoxie</term><term>Contrôle respiratoire</term><term>Contrôle cardiorespiratoire</term><term>Chimioréception</term><term>Chimiorécepteur</term><term>Ventilation pulmonaire</term><term>Rythme cardiaque</term><term>Pisces</term><term>Acipenser naccarii</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Cardioventilatory responses to hypoxia, the O<sub>2</sub> chemoreceptor stimulant sodium cyanide (NaCN), and intra-arterial injection of atropine, noradrenaline and DL-propranolol were investigated in the adriatic sturgeon. 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Propranolol blocked ventilatory responses to intra-arterial infusion of NaCN whereas responses to NaCN added to the water remained unaffected, indicating that propranolol may inhibit internally-oriented O<sub>2</sub>-chemoreceptor activity or that ventilatory responses to intra-arterial NaCN are stimulated by a release of circulating catecholamines. Cardioventilatory control systems in sturgeon are similar to those of other actinopterygians but also show some characteristics of the system described for elasmobranchs</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0034-5687</s0></fA01><fA02 i1="01"><s0>RSPYAK</s0></fA02><fA03 i2="1"><s0>Respir. physiol.</s0></fA03><fA05><s2>100</s2></fA05><fA06><s2>1</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Aspects of cardioventilatory control in the adriatic sturgeon (Acipenser naccarii)</s1></fA08><fA11 i1="01" i2="1"><s1>MCKENZIE (D. J.)</s1></fA11><fA11 i1="02" i2="1"><s1>TAYLOR (E. 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