Free and Total Calcium Concentrations in the Blood of Rainbow Trout, Salmo Gairdneri, during 'stress' Conditions
نویسندگان
چکیده
Measurements were made of the free and total calcium concentrations ([Ca] and Cat), acid-base status, haemoglobin concentration, haematocrit and plasma protein concentration in the blood of the rainbow trout, Salmo gairdneri. In isolated blood, [Ca] was proportional to Cat while log[Ca] was inversely proportional to pH. Similar findings have been reported from human blood. During intense activity, [Ca] increased by 16% without any significant change in Cat. Neither sustained exercise, hypercapnic acidosis nor hypoxia affected [Ca] or Cat. These data indicate that during common natural stress conditions [Ca] is maintained within a narrow range.
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