| Abstract: | 1. Changes in plasma calcium levels, in response to salmon calcitonin injections, were studied in freshwater and sea-water adapted trout (Salmo gairdnerii) and in grey mullet (Chelon labrosus). 2. Low doses (0.1 ng sCT/100 g body weight) elicited hypercalcemia in the two species studied. 3. High doses (0.5 microgram) provoked hypocalcemia only in freshwater and sea-water adapted trout. 4. An hypercalcemic response appears as the primordial effects of CT injections, higher doses of CT leading to hypocalcemic effects. |
