WHEEL RUNNING OF KANGAROO RATS, DIPODOMYS-MERRIAMI, AS RELATED TO FOOD-DEPRIVATION AND BODY-COMPOSITION
WHEEL RUNNING OF KANGAROO RATS, DIPODOMYS-MERRIAMI, AS RELATED TO FOOD-DEPRIVATION AND BODY-COMPOSITION
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DOI：
10.1152/jappl.1978.44.1.17
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发表时间：
1978-01-01
影响因子：
3.3
通讯作者：
MORRIS, JD
中科院分区：
文献类型：
--
作者：
DILL, DB;SOHOLT, LF;MORRIS, JD
在轮笼中，被剥夺食物的袋鼠大鼠在48 h内自行死亡。尽管体重减轻了14.5%，但运行后水与蛋白质的比例与对照大鼠相同。在休息和在运行轮和重量损失在48小时运行的代谢测量被用来估计所使用的燃料和水的消耗。三分之二的脂肪和9%的蛋白质被代谢掉。最终平均体脂百分比约为1967年春季捕获的大鼠中观察到的两倍，当时种子产量较低：48小时内的死亡不可能仅仅是由于体脂耗尽。在匈牙利袋鼠鼠身上看到的强大的活动驱动力大概是在干旱的年份食物稀缺时加强的，可能会耗尽它们的储备，导致饥饿死亡。
Kangaroo rats deprived of food ran themselves to death in 48 h in wheel cages. Despite the loss of 14.5% of body weight the ratio of water to protein was the same after the run as it was in control rats. Metabolic measurements at rest and in the running wheel and weight loss in the 48 h run were used to estimate fuels used and water expended. Two-thirds of the initial amount of fat and 9% of the protein were metabolized. The terminal mean percentage of body fat was about twice that observed in rats trapped in the spring of 1967, when seed production was low: death in the 48 h run could not have been due to depletion of body fat alone. The powerful activity drive seen in hungary kangaroo rats presumably is intensified in dry years when food is scarce and may deplete their reseves enough to result in death from starvation.