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首页> 外文期刊>Physiology & behavior >Individual variability and photic entrainment of circadian rhythms in golden spiny mice.
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Individual variability and photic entrainment of circadian rhythms in golden spiny mice.

机译：金色多刺小鼠的昼夜节律的个体变异性和光合性。

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摘要

Golden spiny mice are diurnally active in most of their natural habitat. Their diurnal activity is ascribed to non-photic cues: competitive exclusion from the nocturnal niche, or thermoregulatory considerations. Here we studied the entrainment of golden spiny mice to light. In the laboratory, golden spiny mice were primarily nocturnal and displayed an unusual variety of rhythm patterns, with activity bursts occurring during both activity and rest periods. Spontaneous shifts of activity rhythms between light phases were sometimes recorded. In all cases but one, body temperature shifted in parallel with activity. Under DD conditions, the free running period (tau) of all individuals but one was shorter than 24 h, and in all individuals but the same one it was shorter than tau under LL conditions. In response to a 6 h phase delay, all individuals entrained to the new LD cycle in a relatively uniform way. During phase advance four out of the twelve individuals further delayed their activity and body temperature rhythms, and eight individuals advanced their activity rhythm, but the re-entrainment took them over twice as long as to re-entrain to the phase delay. We suggest that the golden spiny mouse is a nocturnal rodent whose circadian system developed the flexibility to be nocturnal or diurnal according to environmental conditions, or a nocturnal rodent in the process of turning diurnal, and that it has low sensitivity to the immediate masking effect of light on activity.
机译：金刺鼠在大多数自然栖息地中都具有昼夜活跃性。它们的昼夜活动归因于非光的线索：从夜间生态位竞争性排斥或温度调节的考虑。在这里，我们研究了金色多刺小鼠对光的夹带。在实验室中，金色的多刺小鼠主要是夜间活动的，并且表现出不同寻常的节奏模式，在活动和休息期间都会出现活动爆发。有时记录光相之间的活动节奏的自发变化。除一种情况外，在所有情况下，体温都与活动同时发生变化。在DD条件下，除一个人外，所有个体的自由奔跑期（tau）均短于24小时，而在LL条件下，除同一个人外，所有个体的自由奔跑期（tau）均短于tau。为了响应6小时的相位延迟，所有个人都以相对统一的方式被带入了新的LD周期。在阶段前进过程中，十二个人中有四个个体进一步延迟了他们的活动和体温节律，而八个个体前进了他们的活动节奏，但是重新训练使他们重新陷入阶段延迟的时间超过了两倍。我们建议金黄色多刺小鼠是夜间啮齿类动物，其昼夜节律系统根据环境条件发展为夜间或昼夜性的灵活性，或者是在昼夜转向过程中的夜间啮齿类动物，并且对速效遮盖剂的敏感性较低。活动轻。

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