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A Connection between Episodes of Normothermic Levels of Body Temperature in Animals during Hibernation and Secondary Cosmic Ray Fluctuation Intensity

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Abstract

Episodes of normothermic levels of body temperature over a short time during hibernation were compared in hedgehogs living in the Moscow region and ground squirrels inhabiting Yakutsk. The results of superposed epoch analysis showed that although the distance between the observation sites was about 5000 km and hedgehogs and ground squirrels lived in different places, there was a connection between episodes of normothermic levels of body temperature in the animals studied: the maximum number of short-term normothermia episodes in hedgehogs  was observed on the same days that ground squirrels woke up. A 4-h biorhythm was established in the diurnal dynamics of wakefulness: the largest number of returns to normothermia was recorded both in hedgehogs and ground squirrels, according to local solar time within the time intervals 0–1 a.m, 4–5 a.m., 8–9 a.m., 12 a.m.–1 p.m., 4–5 p.m., and 8–9 p.m. It was shown that the episodes of normothermia were associated with the intensity fluctuations of secondary cosmic rays recorded by a neutron monitor. The noise intensity of silicon transistor and temperature sensors, which is small enough to be directly affected by extremely low variations in cosmic rays, correlated with the expressiveness of fluctuations in the neutron count. We believe that the magnitude of fluctuations in neutron monitor count rate is only a marker of a biotopic agent that has not yet been identified.

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ACKNOWLEDGMENTS

Experiments with hedgehogs were conducted in the Live Collection of Wild Mammals Center for Collective Use of Chernogolovka Scientific and Experimental Base of Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences (Noginsky district, Moscow oblast).

Funding

The study was performed under the state assignment on Ecological and Evolutionary Aspects of Animal Behavior and Communication of Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, no. 0089-2021-0004.

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Correspondence to M. E. Diatroptov.

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Conflict of interests. The authors declare that they have no conflicts of interests.

Statement on the welfare of animals. All experiments were conducted in accordance with the European Convention for the Protection of Vertebrate Animals Used for Experimental and Other Scientific Purposes (Strasburg, 1986). Experiments were approved by the Ethics Committee of Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, no. 14, January 14, 2018.

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Translated by E. Sherstyuk

Abbreviations: NM, neutron monitor.

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Diatroptov, M.E., Anufriev, A.I. & Rutovskaya, M.V. A Connection between Episodes of Normothermic Levels of Body Temperature in Animals during Hibernation and Secondary Cosmic Ray Fluctuation Intensity. BIOPHYSICS 67, 477–484 (2022). https://doi.org/10.1134/S0006350922030046

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  • DOI: https://doi.org/10.1134/S0006350922030046

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