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首页> 外文期刊>Journal of Comparative Physiology, B. Biochemical, Systemic, and Environmental Physiology >Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
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Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards

机译：黑白特古蜥蜴的温度调节行为和心肺生理的每日和年度循环

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摘要

This study was designed to determine the manner in which metabolism is suppressed during dormancy in black and white tegu lizards (Tupinambis merianae). To this end, heart rate (f (H)), respiration rate (f (R)), and deep body temperature (T (b)) were continuously monitored in outdoor enclosures by radio-telemetry for nine months. There was a continuous decline in nighttime breathing and heart rate, at constant T (b), throughout the late summer and fall suggestive of an active metabolic suppression that developed progressively at night preceding the entrance into dormancy. During the day, however, the tegus still emerged to bask. In May, when the tegus made a behavioural commitment to dormancy, T (b) (day and night) fell to match burrow temperature, accompanied by a further reduction in f (H) and f (R). Tegus, under the conditions of this study, did arouse periodically during dormancy. There was a complex interplay between changes in f (H) and T (b) associated with the direct effects of temperature and the indirect effects of thermoregulation, activity, and changes in metabolism. This interplay gave rise to a daily hysteresis in the f (H)/T (b) relationship reflective of the physiological changes associated with warming and cooling as preferred T (b) alternated between daytime and nighttime levels. The shape of the hysteresis curve varied with season along with changes in metabolic state and daytime and nighttime body temperature preferences.
机译：本研究旨在确定黑白特固蜥蜴（Tupinambis merianae）休眠期间抑制代谢的方式。为此，通过无线电遥测法连续九个月对室外围场中的心率（f（H）），呼吸频率（f（R））和深层体温（T（b））进行监测。在整个夏末和秋季，夜间呼吸和心率在T（b）不变的情况下持续下降，这表明主动的代谢抑制在进入休眠之前的晚上逐渐发展。然而，白天，提格斯仍然浮出水面。 5月，当假眼对休眠做出行为承诺时，T（b）（白天和黑夜）下降到与洞穴温度相符的水平，同时f（H）和f（R）进一步降低。在这项研究的条件下，Tegus在睡眠期间确实会定期唤醒。在f（H）和T（b）的变化之间存在复杂的相互作用，这与温度的直接影响以及温度调节，活性和代谢变化的间接影响有关。这种相互作用会引起f（H）/ T（b）关系的每日滞后现象，反映出与升温和降温相关的生理变化，因为优选的T（b）在白天和夜间水平之间交替。磁滞曲线的形状随季节以及新陈代谢状态以及白天和晚上的体温偏好的变化而变化。

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