光照黑暗循环条件下达乌尔黄鼠的冬眠模式和能量消耗  

Hibernation and energy consumption of Daurian ground squirrels(Spermophilus dauricus) under light-dark cycle conditions

作　　者：吕铮[1] 蔡鲁纳[1] 宋士一[1] 刘新宇[1] 彭霞[2] 杨明[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,沈阳110034 [2]沈阳师范大学实验中心,沈阳110034

出　　处：《兽类学报》2015年第4期398-404,共7页Acta Theriologica Sinica

基　　金：国家自然科学基金项目(30770337;31170380);沈阳师范大学生态与环境中心主任基金(EERC-K-201402)

摘　　要：为研究冬眠季节的光照条件对贮脂类冬眠动物入眠的影响,在达乌尔黄鼠腹腔埋植体温记录元件i Button,在体重高峰后的下降阶段置于5℃和12L∶12D的光照条件下,观察测定其冬眠模式和能量消耗。达乌尔黄鼠冬眠模式出现深冬眠型、少冬眠型和不冬眠型,蛰眠阵包括深冬眠阵、短冬眠阵和日眠阵。不同冬眠阵中最低体温、冬眠阵的持续时间、阵间产热的持续时间、冷却速率和复温速率差异显著;阵间产热的最高体温基本相同。平均每日能量消耗在日眠阵中最高、短冬眠阵中居中、深冬眠阵中最低。入眠时间多集中于黑暗时相,觉醒时间多集中于光照时相。本研究结果提示,在冬眠季节施加光照黑暗循环条件可减少达乌尔黄鼠冬眠的时间,升高阵间最低体温,缩短冬眠阵与阵间产热的持续时间,降低复温速率;增加冬眠期间能量消耗。入眠与觉醒受光照条件影响,具有明显的光暗节律。To understand the influence of photoperiod on hibernation in fat-storing hibernators,Daurian ground squirrels（Spermophilus dauricus） were implanted with i Buttons and then moved into 5℃ with 12 h light∶ 12 h dark（12L∶ 12D） after reaching maximum body mass. Three kinds of status were detected in Daurian ground squirrels,deep hibernation,less hibernation and no hibernation. Torpor bout patterns included deep hibernation bouts（DHB）,short hibernation bouts（SHB） and daily torpor bouts（DTB）. Tbminduring hibernation bouts,bout duration,duration of inter-bout euthermia,cooling rate and warming rate displayed significant differences in different torpor bout patterns. There were no significant differences in Tbmaxduring inter-bout euthermia. Daily energy consumption in animals with DTBs was the highest,less in animals with SHB and the lowest in animals with DHBs. The time at which torpor was entered usually happened in the dark phase,while awakening from hibernation occurred mostly during the light phase. The results indicate that compared with animals under constant darkness during hibernation,duration of hibernation in daurian ground squirrels was reduced under light-dark cycle conditions. Also torpor bouts were influenced by showing elevated Tbminduring torpor bouts,reduced bout duration and duration of inter-bout euthermia and increased energy consumption during hibernation. Hibernating and awakening times showed obvious light-dark rhythm under Light-dark cycle.

关 键 词：光照周期 冬眠模式 蛰眠阵 能量消耗 光暗节律 

分 类 号：Q494[生物学—生理学]