spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

First published online November 19, 2007
Journal of Experimental Biology 210, 4224-4232 (2007)
Published by The Company of Biologists 2007
doi: 10.1242/jeb.009266
This Article
Right arrow Summary Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by McKenzie, D. J.
Right arrow Articles by Abe, A. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by McKenzie, D. J.
Right arrow Articles by Abe, A. S.
Social Bookmarking
Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

The autonomic control and functional significance of the changes in heart rate associated with air breathing in the jeju, Hoplerythrinus unitaeniatus

D. J. McKenzie1,*, H. A. Campbell2, E. W. Taylor3, M. Micheli4, F. T. Rantin4 and A. S. Abe5

1 Institut des Sciences de l'Evolution de Montpellier, UMR 5554 CNRS-Université Montpellier II, Station Méditerranéenne de l'Environnement Littoral, 1 quai de la Daurade, 34200 Sète, France
2 School of Integrative Biology, University of Queensland, Brisbane, QL 4072, Australia
3 School of Biosciences, University of Birmingham, Birmingham, B15 2TT, UK
4 Department of Physiological Sciences, Federal University of São Carlos, São Carlos, Brazil
5 Departamento de Zoologia, Centro de Aquicultura, UNESP, Rio Claro, São Paulo, Brazil


Figure 1
View larger version (23K):
[in this window]
[in a new window]

  		Fig. 1. Mean (±s.e.m.) rates of instantaneous oxygen uptake (MO2) from water and air, and in total, as a function of water PO2 (PwO2) in seven jeju. The black arrows show the point at which either propranolol (left arrow) or atropine (right arrow) was injected (see text for details). The labelled red horizontal lines denote the periods when data were analysed for the comparisons shown in Table 1.

 

Figure 2
View larger version (10K):
[in this window]
[in a new window]

  		Fig. 2. Mean (±s.e.m.) instantaneous heart rate for 21 observations on seven jeju, as calculated per R–R interval over 20 heartbeats prior to and succeeding an air breath (see text for details). Each panel shows the fish under (A) hypoxia, (B) hypoxia following adrenergic receptor blockade, and (C) hypoxia following adrenergic and cholinergic receptor blockade. The black arrow denotes when exhalation was completed and inhalation initiated.

 

Figure 3
View larger version (47K):
[in this window]
[in a new window]

  		Fig. 3. The pattern of heart rate variability (HRV) within 250 consecutive heartbeat intervals (R–R interval) of a single H. unitaeniatus in (A) normoxia, (B) hypoxia, (C) hypoxia and blockade of adrenergic receptors, and (D) hypoxia and total (adrenergic and cholinergic receptor) blockade. The 250 consecutive R–R intervals are displayed as (i) a tachogram plot, (ii) a frequency histogram in 5 ms bins, and (iii) a power spectrum of the Fourier transform that shows the frequency and power of oscillatory components of the R–R interval tachogram.

 

Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?



© The Company of Biologists Ltd 2007