Basic research on development of experimental animal model for weak heat tolerance and bbehavioral thermoregulation

(1)野外遥测蒙古鼠兔体温的研究鼠兔生活在寒冷地区或高山地区，对寒冷和高海拔环境具有一定的适应性。鼠兔的体温高（39.6 ℃），代谢快，散热能力差，如热流涎不足。在本研究中，我们用遥测装置测量了蒙古国野生达乌尔鼠兔（Ochotona daurica）的体温。在Under Dov捕获的两只鼠兔在麻醉下被植入腹腔内的发射器，并被送回自己的栖息地。帕卡的平均体温分别为39.65摄氏度和39.96摄氏度，尽管数据仅限于不到一天的短时间内。本研究结果支持了前人研究中鼠兔体温较高的观点。(2)鼠兔的解剖学观察与热耐受性胸、腹部皮肤的隔热性不如背部和腰部。对于鼠兔来说，趴着是一种行为上的热损失反应。高原鼠兔对寒冷环境的适应是由于其具有不同于冬眠动物低温耐寒性的储热和产热作用。

(1) A Field Study of Telemetry-Recording of the Body Temperature in Wild Mongolian PikaThe pika inhabiting in cold zone or in high mountains is thought to be adapted to cold as well as high-altitude environment. We have reported pika's high body temperature (39.6ﾟC), high metabolism and poor heat loss ability such as poor lack of thermal salivation. In this study, we measured the body temperature of wild pikas (Ochotona daurica) with a telemetry device in their natural borrows in Mongolia. Two pikas captured at Under Dov were implanted with transmitters in the abdominal cavity under anesthesia, and were returned to the own habitat. The mean body temperatures of the pakas were 39.65ﾟC and and 39.96ﾟC,though the data were limited to a short period of less than one day. The present results in wild pikas support pika's high body temperature in our previous studies.(2) Anatomical observations and thermal tolerance in pika (Ochotona curzoniae)The heat insulations of chest and abdomen skin were inferior to back and waist. For pikas lying on their belly is a behavioral heat loss response. The high altitude adaptation of Pika in cold environment is due to heat conservation and heat production to be different from cold tolerance in hypothermia like as hibernator.