title: 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.
mesh_terms: D000136:Acid-Base Equilibrium; D000818:Animals; D001772:Blood Cell Count; D001784:Blood Gas Analysis; D002245:Carbon Dioxide / Q000378:metabolism; D005399:Fishes / Q000097:blood / Q000378:metabolism*; D010100:Oxygen / Q000097:blood*; D012119:Respiration
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen