缺水状态下的南极鸬鹚（Larus dominicanus）、海角塘鹅（Sula capensis）和斑嘴环企鹅（Spheniscus demersus）体内的血浆精氨酸血管催产素和血管紧张素II 。

Plasma arginine vasotocin and angiotensin II in the water deprived Kelp gull (Larus dominicanus), Cape gannet (Sula capensis) and Jackass penguin (Spheniscus demersus).

Gray D A, Erasmus T

Department of Zoology, University of Port Elizabeth, South Africa.

Comp Biochem Physiol A Comp Physiol. 1988;91(4):727-32. doi: 10.1016/0300-9629(88)90957-7.

Abstract

The basal levels of the osmoregulatory hormones, arginine vasotocin (AVT) and angiotensin II (AII) were measured (by radioimmunoassay) in the plasma of conscious Kelp gulls, Cape gannets and Jackass penguins. 2. The responses of the hormones to similar degrees of hypertonicity and hypovolemia caused by water deprivation have also been determined. 3. Dehydration elevated plasma AVT and plasma AII in all three species. 4. The AVT concentration was increased by 2-4 fold and although in each case the correlation between plasma osmolality and plasma AVT was highly significant (2P less than 0.01), the sensitivity of release was greater in the gull (1.13 pg/ml per mOsm/kg) than in the gannet (0.36 pg/ml per mOsm/kg) or penguin (0.44 pg/ml per mOsm/kg). 5. Dehydration increased plasma AII 3-fold in the three bird types.

摘要

通过放射免疫分析法测定了清醒状态下的南极鸬鹚、海角鲣鸟和斑嘴环企鹅血浆中渗透调节激素精氨酸血管加压素（AVT）和血管紧张素II（AII）的基础水平。2. 还测定了这些激素对因缺水导致的相似程度的高渗性和低血容量的反应。3. 脱水使所有这三个物种的血浆AVT和血浆AII升高。4. AVT浓度增加了2至4倍，尽管在每种情况下血浆渗透压与血浆AVT之间的相关性都非常显著（P<0.01），但鸬鹚（每mOsm/kg为1.13 pg/ml）释放AVT的敏感性高于鲣鸟（每mOsm/kg为0.36 pg/ml）或企鹅（每mOsm/kg为0.44 pg/ml）。5. 脱水使这三种鸟类的血浆AII增加了3倍。