Free And Total Calcium Concentrations in the Blood of Rainbow Trout, Salmo Gairdneri, During ‘Stress’ Conditions
Open Access
- 1 September 1985
- journal article
- Published by The Company of Biologists in Journal of Experimental Biology
- Vol. 118 (1) , 111-120
- https://doi.org/10.1242/jeb.118.1.111
Abstract
Measurements were made of the free and total calcium concentrations ([Ca2+] and Cat), acid-base status, haemoglobin concentration, haematocrit and plasma protein concentration in the blood of the rainbow trout, Salmo gairdneri. In isolated blood, [Ca2+] was proportional to Cat while log[Ca2+] was inversely proportional to pH. Similar findings have been reported from human blood. During intense activity, [Ca2+] increased by 16% without any significant change in Cat. Neither sustained exercise, hypercapnic acidosis nor hypoxia affected [Ca2+] or Cat. These data indicate that during common natural stress conditions [Ca2+] is maintained within a narrow range.Keywords
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