Greenwood K, Armstrong S, Coleman G
Physiol Behav. 1980 Jun;24(6):1119-23. doi: 10.1016/0031-9384(80)90057-8.
Male laboratory rats were fed a highly palatable diet during the light phase of a 12:12 LD cycle. Nocturnality of feeding was reduced from approximately 77% of the total daily intake to 56%. Increase in diurnal feeding was attributable to the ingestion of a large meal at the beginning of the L phase. Reduction of nocturnal feeding was attributable to decreased ingestion in the first 3 hr of the D phase. Outside these times the daily feeding pattern was unmodified. These findings do not represent a reversal of the feeding rhythm as previously reported, but a modification which is not consistent with interpretation as a phase-shift. Throughout the testing period total daily food intake remained unchanged and body weight was defended despite the increase in calories ingested. Daily drinking patterns and total daily water intake were not significantly altered by the experimental manipulation.
在12:12光照-黑暗周期的光照阶段，给雄性实验大鼠喂食美味的食物。进食的夜行性从占每日总摄入量的约77%降至56%。日间进食的增加归因于在光照阶段开始时摄入了一顿大餐。夜间进食的减少归因于黑暗阶段开始的前3小时内摄入量减少。在这些时间之外，每日进食模式未改变。这些发现并不像之前报道的那样代表进食节律的逆转，而是一种与相移解释不一致的改变。在整个测试期间，尽管摄入的卡路里增加，但每日食物总摄入量保持不变，体重也得到了维持。实验操作并未显著改变每日饮水模式和每日总饮水量。
