ADRENOCORTICAL SECRETION IN THE WOMBAT, VOMBATUS HIRSUTUS PERRY

Abstract
As part of the systematic investigation of adrenal function in marsupials, the following data were obtained from the common wombat (Vombatus hirsutus), a bear-like burrowing marsupial restricted to south-eastern Australia (see Troughton, 1957). Four wombats, three males and one female weighing 25–30 kg., were anaesthetized with ether, followed by i.v. sodium pentobarbitone. The left adrenal gland, which has a single vein draining into the left renal vein, was exposed through a midline incision. The procedures for collecting adrenal venous blood and steroid assay have been described previously (Weiss & McDonald, 1965). The quantitative estimates were confirmed by measurement of absorbance in u.v. light and Porter-Silber chromogens (Silber & Porter, 1954) for cortisol, and u.v. light absorbance only for corticosterone. To assay tetrahydrocortisol and cortisone, the deproteinized watery fraction of plasma was hydrolysed with β-glucuronidase/aryl sulphatase (Boehringer and Soehne, Mannheim, Germany). The purified extract was chromatographed in system B/50 and the

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