Acute heat stress induces jumping escape behavior in mice.

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  • 急性熱ストレスに伴うマウスの跳躍逃避行動

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A new heat escape behavior was revealed in mice under acute heat stress condition. Mice were exposed to each condition of 24, 34, 37 and 38.5°C for 60 min. Rectal temperature increased under the 34°C condition, and under 37 and 38.5°C conditions serum osmolality and body weight loss also increased. A large number of mice exposed to above 37°C attempted to escape from the partially covered cage, and so exhibited jumping behavior during the 60 min. But, mice exposed to 24 and 34°C did not. These results indicated that acute heat stress above 37°C induced evaporative water loss and jumping escape behavior in mice. [Jpn J Physiol 54 Suppl:S243 (2004)]

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