THE EFFECT OF ADRENOCORTICAL STEROIDS ON THE RENAL AND EXTRA-RENAL RESPONSES OF THE DOMESTIC DUCK (<i>ANAS PLATYRHYN-CHUS</i>) AFTER HYPERTONIC SALINE LOADING¹

Abstract

All ducks showed an initial diuresis during the first hour after saline loading and at varying times during this phase the onset of nasal secretion occurred. The total extra-renal secretion of sodium and potassium in response to a saline load was increased after treatment with adrenocortical steroids. The most potent hormone in this respect was aldosterone. In the presence of exogenous adrenocortical steroids and ACTH the extrarenal response was independent of the rise in serum sodium as a result of the saline load. The results are discussed in relation to similar studies with teleost fish.