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Blood oxygen levels and acid-base status following air exposure in an air-breathing fish, Channa argus: the role of air ventilation.

Abstract

1. Acute air exposure of an air-breathing fish Channa argus immediately induced hypercapnic acidemia while total CO2 content of blood remained unchanged. Upon reimmersion, paco2 and pHa quickly restored to pre-exposure levels followed by gradual rise of [HCO-3]. 2. Artificial air ventilation of air-exposed fish restored acid-base status and greatly depressed voluntary air ventilatory movements. We conclude that the major cause of acid-base disturbances occurring during air exposure is the reduced air convection.

PMID:
6132723
DOI:
10.1016/0300-9629(83)90348-1
[Indexed for MEDLINE]

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