SLIDING SET POINTS FOR BODY WEIGHT IN GROUND SQUIRRELS DURING HIBERNATION SEASON
SLIDING SET POINTS FOR BODY WEIGHT IN GROUND SQUIRRELS DURING HIBERNATION SEASON
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DOI：
10.1139/z70-040
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发表时间：
1970-01-01
期刊：
影响因子：
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通讯作者：
FISHER, KC
中科院分区：
文献类型：
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作者：
MROSOVSKY, N;FISHER, KC
13系地松鼠Citellus tridecemlineatus在冬季反复被唤醒，其冬眠季节的持续时间仅略短于未受干扰的动物。被唤醒的动物在冬眠季节中期吃掉了八倍多的食物。这表明，地松鼠通过增加食物摄入量来补偿因反复兴奋而被迫消耗的额外能量。被剥夺食物的兴奋动物比未受干扰的动物体重减轻的速度更快。当食物返回时，它们的体重迅速增加。然而，体重并没有恢复到剥夺前的水平，而仅恢复到适合返回食物时的周期阶段的水平。这些发现表明，即使地松鼠在冬季体重减轻，它们也会调节体重，但体重会逐渐下降。潜在的机制可能取决于下丘脑内侧和外侧区域之间平衡的调整。
The duration of the hibernation season of 13-lined ground squirrels,Citellus tridecemlineatus, repeatedly aroused over the winter, was only slightly less than that of undisturbed animals. The aroused animals ate more than eight times as much food during the middle of their hibernation season. This suggests that ground squirrels compensate by increased food intake for extra energy expenditure forced on them by repeated arousals. Aroused animals deprived of food lost weight at a greater rate than undisturbed animals. When food was returned they gained weight rapidly. However, weights did not return to predeprivation levels, but only to levels appropriate for the stage of the cycle at the time food was returned. These findings suggest that, even when ground squirrels are losing weight over the winter, they regulate their weight, but at a level that progressively declines. The underlying mechanisms probably depend on adjustments to the balance between medial and lateral hypothalamic areas.