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  • Title: [Thyroid hormone levels in the peripheral blood of the ground squirrel Citellus parryi during winter hibernation].
    Author: Nevretdinova ZG, Shvareva NV.
    Journal: Zh Evol Biokhim Fiziol; 1987; 23(1):42-7. PubMed ID: 3564777.
    Abstract:
    In the Arctic ground squirrel Citellus parryi, thyroxine and triiodothyronine concentrations in the peripheral blood have been determined by RIA in various seasons and during a short hibernation period. It was shown that during hibernation (December-February), hormonal concentration is higher than during homoiothermal period (August-October). The highest concentration of the thyroid hormones was found in hibernating animals in January. The data obtained indicate that thyroid hormones are involved in control of hibernation of the species investigated.
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