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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2013 Vol.32 No.5

The Influence of Temperature and Humidity on the Physiological Function in Toads
Author of the article:LI Xiuguo, LI Hongyan, LI Haidong, JIN Wen, MENG Fan, CHENG Zhongjiao, PANG Miao
Author's Workplace:(College of Medicine, Yanbian University, Yanji, Jilin Province 133002, China)
Key Words:temperature; humidity; survival time; physiological function; toad
Abstract:

The effects of temperature and humidity on survival time and physiological function of toads were investigated in this study. Toads were randomly divided into four groups: room temperature low humidity, room temperature high humidity, low temperature high humidity, and low temperature hibernation to monitor the life states, body weights, cardiac activity, gastrocnemius muscle contractility and electrophysiological characteristics of the sciatic nerve. Compared to the pretreatment group, body weight of the group in room temperature low humidity decreased significantly (P<0.01) since day 1 of the experiment, while no significant change was observed in other groups. The cumulative mortality of toads reached to 100% (day 6), 45.83% (day 27), 16.67% (day 36) and 0% in room temperature low humidity, room temperature high humidity, low temperature high humidity, and low temperature hibernation, respectively. No significant change was observed in the force and heart beating rates of all groups except the force in the room temperature high humidity group since day 20 (P<0.05). Contractility of gastrocnemius muscle was significantly decreased (P<0.05) in room temperature low humidity group since day 4, while no significant change was observed in other groups. The changes of electrophysilological characteristics of sciatic nerves were not significant in all groups. The survival time and maintaining time of normal physiological function of fasting toads could be prolonged by sufficient humidity and appropriate low temperature, especially in the state of hibernation.

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