Autonomic control of post-air-breathing tachycardia in Clarias gariepinus (Teleostei: Clariidae)
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| 024 | 7 | 0 | |a 10.1007/s00360-015-0910-z |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00360-015-0910-z | ||
| 245 | 0 | 0 | |a Autonomic control of post-air-breathing tachycardia in Clarias gariepinus (Teleostei: Clariidae) |h [Elektronische Daten] |c [Mariana Teixeira, Vinicius Armelin, Augusto Abe, Francisco Rantin, Luiz Florindo] |
| 520 | 3 | |a The African catfish (Clarias gariepinus) is a teleost with bimodal respiration that utilizes a paired suprabranchial chamber located in the gill cavity as an air-breathing organ. Like all air-breathing fishes studied to date, the African catfish exhibits pronounced changes in heart rate (f H) that are associated with air-breathing events. We acquired f H, gill-breathing frequency (f G) and air-breathing frequency (f AB) in situations that require or do not require air breathing (during normoxia and hypoxia), and we assessed the autonomic control of post-air-breathing tachycardia using an infusion of the β-adrenergic antagonist propranolol and the muscarinic cholinergic antagonist atropine. During normoxia, C. gariepinus presented low f AB (1.85±0.73 ABh−1) and a constant f G (43.16±1.74 breathsmin−1). During non-critical hypoxia (PO2=60mmHg), f AB in the African catfish increased to 5.42±1.19 ABh−1 and f G decreased to 39.12±1.58 breathsmin−1. During critical hypoxia (PO2=20mmHg), f AB increased to 7.4±1.39 ABh−1 and f G decreased to 34.97±1.78 breathsmin−1. These results were expected for a facultative air breather. Each air breath (AB) was followed by a brief but significant tachycardia, which in the critical hypoxia trials, reached a maximum of 143% of the pre-AB f H values of untreated animals. Pharmacological blockade allowed the calculation of cardiac autonomic tones, which showed that post-AB tachycardia is predominantly regulated by the parasympathetic subdivision of the autonomic nervous system. | |
| 540 | |a Springer-Verlag Berlin Heidelberg, 2015 | ||
| 690 | 7 | |a African catfish |2 nationallicence | |
| 690 | 7 | |a Autonomic control |2 nationallicence | |
| 690 | 7 | |a Air breathing |2 nationallicence | |
| 690 | 7 | |a Hypoxia |2 nationallicence | |
| 690 | 7 | |a Tachycardia |2 nationallicence | |
| 700 | 1 | |a Teixeira |D Mariana |u Department of Zoology and Botany, São Paulo State University (UNESP), Cristóvão Colombo Street, 2265, 15054-000, São José Do Rio Preto, SP, Brazil |4 aut | |
| 700 | 1 | |a Armelin |D Vinicius |u Department of Physiological Sciences, Federal University of São Carlos (UFSCar), Via Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil |4 aut | |
| 700 | 1 | |a Abe |D Augusto |u Department of Zoology, São Paulo State University (UNESP), 24A Avenue, 1515, 13506-900, Rio Claro, SP, Brazil |4 aut | |
| 700 | 1 | |a Rantin |D Francisco |u Department of Physiological Sciences, Federal University of São Carlos (UFSCar), Via Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil |4 aut | |
| 700 | 1 | |a Florindo |D Luiz |u Department of Zoology and Botany, São Paulo State University (UNESP), Cristóvão Colombo Street, 2265, 15054-000, São José Do Rio Preto, SP, Brazil |4 aut | |
| 773 | 0 | |t Journal of Comparative Physiology B |d Springer Berlin Heidelberg |g 185/6(2015-08-01), 669-676 |x 0174-1578 |q 185:6<669 |1 2015 |2 185 |o 360 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00360-015-0910-z |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00360-015-0910-z |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Teixeira |D Mariana |u Department of Zoology and Botany, São Paulo State University (UNESP), Cristóvão Colombo Street, 2265, 15054-000, São José Do Rio Preto, SP, Brazil |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Armelin |D Vinicius |u Department of Physiological Sciences, Federal University of São Carlos (UFSCar), Via Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Abe |D Augusto |u Department of Zoology, São Paulo State University (UNESP), 24A Avenue, 1515, 13506-900, Rio Claro, SP, Brazil |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Rantin |D Francisco |u Department of Physiological Sciences, Federal University of São Carlos (UFSCar), Via Washington Luiz, km 235, 13565-905, São Carlos, SP, Brazil |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Florindo |D Luiz |u Department of Zoology and Botany, São Paulo State University (UNESP), Cristóvão Colombo Street, 2265, 15054-000, São José Do Rio Preto, SP, Brazil |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Journal of Comparative Physiology B |d Springer Berlin Heidelberg |g 185/6(2015-08-01), 669-676 |x 0174-1578 |q 185:6<669 |1 2015 |2 185 |o 360 | ||