Response of serum calcium to administration of an extract from Stannius corpuscles in the anurans

Summary The effect of i.p. injection of an aqueous extract of Stannius corpuscles (10 mg/ml/100 g b.wt) on serum calcium levels was investigated inRana cyanophlyctis andBufo andersonii. This treatment evokes in both species hypocalcemia over a period of 1–4 h, followed by hypercalcemia at 6 h, with a return to control at 8 h.