Pastukhov Iu F, Nevretdinova Z G, Slovikov B I
Zh Evol Biokhim Fiziol. 1995 Jul-Aug;31(4):475-82.
Under uninterrupted (during 10 days) temperature registration from 4 nest boxes ("thermogradient" plant) clear-cut changes were determined: in preferable temperature (PT, degrees C, in 24 hrs at an average)--21.0 +/- 0.5 (spring), 22.7 +/- 0.3 (summer), 18.8 +/- 0.7 (autumn), 11.5 +/- 0.5 (period before hibernation-PBH), 7.5 +/- 7.9 (hibernation season); in locomotor activity duration (LA, per cent from 24 hrs) which has decreased from 29.6% in spring to 20.3% at PBH (p < 0.001), and approximately to 2-3% during hibernation season; and in body mass which has varied from 350 g in spring to 750 at PBH. An increase in LA circadian rhythm amplitude was revealed in autumn, and the appearance and a rapid increase in PT circadian rhythm amplitude were observed at the beginning of PBH. A stage-to-stage "upswinging" of activity/rest circadian rhythms (stage I) and of thermoregulatory behavior (stage II) are supposed to occur at the end of euthermy season, which promotes synchronizing of the physiological processes and extending of the thermoneutra zone before the entrance into torpor and hibernation.
在对4个巢箱（“温度梯度”装置）进行连续10天的温度记录过程中，确定了明显的变化：适宜温度（PT，摄氏度，24小时平均）——春季为21.0±0.5，夏季为22.7±0.3，秋季为18.8±0.7，冬眠前时期（PBH）为11.5±0.5，冬眠季节为7.5±7.9；运动活动持续时间（LA，占24小时的百分比）从春季的29.6%降至PBH时的20.3%（p<0.001），在冬眠季节约降至2 - 3%；体重从春季的350克变化至PBH时的750克。秋季发现LA昼夜节律振幅增加，在PBH开始时观察到PT昼夜节律振幅出现并迅速增加。在常温季节结束时，活动/休息昼夜节律（第一阶段）和体温调节行为（第二阶段）可能会逐阶段“上升”，这有助于生理过程的同步，并在进入蛰伏和冬眠之前扩展热中性区。
