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Journal of Experimental Biology, Vol 84, Issue 1 289-302, Copyright © 1980 by Company of Biologists

JOURNAL ARTICLES

The effects of enforced activity on ventilation, circulation and blood acid-base balance in the aquatic gill-less urodele, Cryptobranchus alleganiensis; a comparison with the semi-terrestrial anuran, Bufo marinus

RG Boutilier, DG McDonald and DP Toews

A combined respiratory and metabolic acidosis occurs in the arterial blood immediately following 30 min of strenuous activity in the predominantly skin-breathing urodele, Cryptobranchus alleganiensis, and in the bimodal-breathing anuran, Bufo marinus, at 25 degrees C. In Bufo, the bulk of the post-exercise acidosis is metabolic in origin (principally lactic acid) and recovery is complete within 4-8 h. In the salamander, a lower magnitude, longer duration, metabolic acid component and a more pronounced respiratory acidosis prolong the recovery period for up to 22 h post-exercise. It is suggested that fundamental differences between the dominant sites for gas exchange (pulmonary versus cutaneous), and thus in the control of respiratory acid-base balance, may underline the dissimilar patterns of recovery from exercise in these two species.


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G. Tattersall and R. Boutilier
Does behavioural hypothermia promote post-exercise recovery in cold-submerged frogs?
J. Exp. Biol., January 3, 1999; 202(5): 609 - 622.
[Abstract] [PDF]


© The Company of Biologists Ltd 1980