Abstract
It is well established that in mammals ethanol is a potent chemical inhibitor of the release of the antidiuretic hormone (ADH), including the antidiuresis that follows the administration of hypertonic saline (see Kleeman & Cutler, 1963; Heller & Ginsburg, 1966). Ethanol also inhibits histological changes in the mammalian hypothalamic neurosecretory system (HNS) that normally follow treatment with hypertonic saline (Raiha, 1960; Kulshreshtha & Dominic, 1972). However, very few studies are available on the effect of ethanol on the neurohypophysis of birds and other non-mammalian vertebrates. The present report deals with the effect of ethanol on the HNS of the spotted owlet after treatment with hypertonic saline. Birds weighing 120–140 g were divided into four groups with 25 individuals of either sex in each group, and were given the following treatments, Group 1: 3% NaCl solution (1 ml/animal/day) for 3–5 days; Group 2:3% NaCl solution (1 ml/animal/day), and 15% ethanol
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