spacer gif spacer gif spacer gif spacer gif Propose a Workshop for 2011 spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
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 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 Wells, R.
Right arrow Articles by Satchell, G.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Wells, R.
Right arrow Articles by Satchell, G.
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?

Journal of Experimental Biology, Vol 123, Issue 1 43-53, Copyright © 1986 by Company of Biologists

JOURNAL ARTICLES

Blood oxygen transport in the free-swimming hagfish, Eptatretus cirrhatus

RM Wells, ME Forster, W Davison, HH Taylor, PS Davie and GH Satchell

Arterial and mixed venous blood were sampled through chronically implanted cannulae from rested and swimming hagfish. PaO2 remained high when hagfish were swum for 15 min at a velocity of 20 cm s-1. PvO2 fell from 17.2 mmHg at rest to 3.5 mmHg after swimming, and the arteriovenous pH difference increased from 0.15 to 0.25 pH units. Whole blood oxygen equilibrium curves were essentially hyperbolic (Hill's n value = 1.38) and gave a half-saturation PO2 (P50) value of 12.3 mmHg at pH 7.8 and 16 degrees C. A CO2-Bohr factor (phi = delta logP50/delta pH) of -0.43 and a limited buffering capacity of the blood, amounting to approx. 4 slykes, were observed. The role of the blood in transporting oxygen and carbon dioxide both at rest and after swimming is established by in vivo blood gas measurements and in vitro oxygen-binding data. The low internal PvO2 at rest is close to the P50 measured under similar conditions and the hyperbolic equilibrium curve permits further oxygen unloading when PvO2 falls during swimming.
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?


This article has been cited by other articles:


Home page
 J. Exp. Biol.Home page
G. Muller, A. Fago, and R. E. Weber
Water regulates oxygen binding in hagfish (Myxine glutinosa) hemoglobin
J. Exp. Biol., April 15, 2003; 206(8): 1389 - 1395.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
R. F. Burton
Evolutionary determinants of normal arterial plasma pH in ectothermic vertebrates
J. Exp. Biol., March 1, 2002; 205(5): 641 - 650.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
K. R. Olson, M. J. Russell, and M. E. Forster
Hypoxic vasoconstriction of cyclostome systemic vessels: the antecedent of hypoxic pulmonary vasoconstriction?
Am J Physiol Regulatory Integrative Comp Physiol, January 1, 2001; 280(1): R198 - R206.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
T Peters, R. Forster, and G Gros
Hagfish (Myxine glutinosa) red cell membrane exhibits no bicarbonate permeability as detected by (18)O exchange
J. Exp. Biol., January 5, 2000; 203(10): 1551 - 1560.
[Abstract] [PDF]

Home page
 J. Biol. Chem.Home page
A. Fago, L. Giangiacomo, R. D'Avino, V. Carratore, M. Romano, A. Boffi, and E. Chiancone
Hagfish Hemoglobins. STRUCTURE, FUNCTION, AND OXYGEN-LINKED ASSOCIATION
J. Biol. Chem., July 13, 2001; 276(29): 27415 - 27423.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1986