The importance of asphyxia for the development of diving bradycardia in ducks.
Upon submersion, the domestic duck normally displays a prompt but modest cardiac retardation, which, after a short delay, is reinforced into a pronounced state of bradycardia. The present study has revealed that arterial asphyxia is a prerequisite for the reinforcement of the initial slight bradycardia.
D000818:Animals; D001237:Asphyxia; D001794:Blood Pressure; D002628:Chemoreceptor Cells; D004242:Diving; D004372:Ducks / Q000502:physiology*; D005260:Female; D006339:Heart Rate; D008297:Male; D012119:Respiration