Abstract
Previously, in male Greenfinch, we have described ultradian rhythms of body temperature with periods of 3–6, 8–10, 12–20, and 40–60 min. There are individual variations in this rhythmicity. Rhythms with a period of 3–7 min are more characteristic of some males but not for the others. These males had small values of the ratio of the harmonic spectral density in the range of 12–20 min to the harmonic spectral density in the range of 3–7 min. In this study, we hypothesized that ultradian rhythmicity of body temperature fluctuations is related to the nervous system activity in general and to temperament in particular. We have conducted two sets of experiments for estimating the aggression level (n = 12 males) and reaction to novelty (n = 17). Individuals with predominant rhythms with a period of 3–7 min are less aggressive and more slowly adapt to new conditions. Thus, the ultradian body temperature rhythmicity in Greenfinch is related to their behavioral features and temperament.
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Funding
The study was carried out in the framework of the State Contract of the Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, no. 0089-2021-0004 “Ecological and evolutionary aspects of animal behavior and communication.”
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All procedures performed in studies involving experimental animals When working with experimental were in accordance with the European Convention for the Protection of Vertebrate Animals Used for Experiments or Other Scientific Purposes (Strasbourg, 1986). For the experimental work, a positive conclusion was received from the Ethical Commission of the Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences no. 14 dated January 15, 2018.
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The authors declare that they have no conflicts of interest.
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Translated by T. Kuznetsova
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Diatroptov, M.E., Opaev, A.S. & Surov, A.V. Ultradian Rhythms of Body Temperature Are Associated with Temperament in Greenfinch (Chloris chloris, Fringillidae, Aves). Dokl Biol Sci 499, 93–96 (2021). https://doi.org/10.1134/S0012496621040025
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DOI: https://doi.org/10.1134/S0012496621040025