Okawara Y, Karakida T, Yamaguchi K, Kobayashi H
Gen Comp Endocrinol. 1985 Apr;58(1):89-92. doi: 10.1016/0016-6480(85)90139-x.
A diurnal rhythm was noted in the hourly water intake of the Japanese quail exposed to a 12L:12D photoperiod. Two peaks for the water intake were observed: from 07:00 to 08:00, 1 hr after turning on the light source, and from 18:00 to 19:00, 1 hr before termination of the light source. The plasma angiotensin II (AII) concentration also showed two peaks: one at 06:00, 1 hr before the light source was turned on, and another at 18:00, 1 hr before the light was turned off. The two plasma AII peaks each occurred 1 hr before those for the water intake, respectively. The drinking rate was reduced by Captopril (SQ14225) administered at 07:05 and 18:14, when the plasma AII concentration and drinking rate were highest. The hematocrit was significantly higher during the dark period than the light period.
在暴露于12小时光照：12小时黑暗光周期的日本鹌鹑中，观察到每小时饮水量存在昼夜节律。观察到饮水量有两个峰值：一个在07:00至08:00，即光源打开后1小时；另一个在18:00至19:00，即光源关闭前1小时。血浆血管紧张素II（AII）浓度也显示出两个峰值：一个在06:00，即光源打开前1小时；另一个在18:00，即光源关闭前1小时。血浆AII的两个峰值分别比饮水量的峰值提前1小时出现。在血浆AII浓度和饮水量最高的07:05和18:14给予卡托普利（SQ14225），饮水率降低。红细胞压积在黑暗期显著高于光照期。
