摘要
鼠兔生活在高山和寒冷地带，是４０００万年前的冰河时代遗留下来的最古老兔种。本研究的目的是与大鼠对照，观察在高温环境下鼠兔的温热性唾液分泌能力。在２６℃室温下，鼠兔（Ｎ＝９）的直肠温是３９５８℃，比大鼠（Ｎ＝８）的直肠温明显地高。蒸散量两种动物几乎相同。在４０℃环境下，鼠兔平均加温１２２２ｍｉｎ，大鼠平均加温２６ｍｉｎ，直肠温都上升３．２℃左右。大鼠的蒸散量为２６℃时的６５倍，可观察到明显的唾液分泌和涂布现象。鼠兔的蒸散量为２６℃时的３倍，未观察到唾液分泌现象。
he pika, whistle rabbit. is an old-fashioned rabbit whichhad survived the Age of Ice,and lives in cold zone and high mountains.In our present study,thermal salivation of the pika was examined to compare with that of rats,in which thermal salivation is one of the major heat load responses.Initail rectal temperature of pikas (n=9) was 39.58℃ in average at 26℃ of ambient temperature,and was significantly higher than that of rats(n=8).Mean perspiration rate of pikas and rats are almost same at 26℃.Mean duration of heating at 40℃ was 1222 min in pikas and 26 min in rats.Mean data increase in rectal temperature after 40℃ heat heat load.However,it was about 2℃ in both animals. After 40℃ heat load for each duration, 3 times and 65 times of increase in perspiration rate during heating and the skin werewet after the heat load. In pikas, however,saliva spreading behavior was seldomly observed during heating.
出处
《实验动物科学与管理》
1998年第1期18-20,共3页
Laboratory Animal Science & Administration
关键词
阿富汗鼠兔
热负荷
唾液分泌
Afghan pika
Heat load
Perspiration rate
Thermal salivation.
