Volta

Body temperature and locomotor activity of social subterranean mole voles (Ellobius talpinus) in winter

To find out whether a social subterranean rodent—the northern mole vole ( Ellobius talpinus )—hibernates in winter, nine individuals from Southern Siberia were captured in late autumn and implanted with loggers [that constantly recorded body temperature (T b ) and locomotor activity] and then released. Eight of them were recaptured the following spring. From October to April, the animals’ T b never dropped below 33 °C, although cosinor analysis revealed a decrease in mesor values and in the amplitude of daily fluctuations of T b and activity in winter months. Spectral density of circadian rhythms of both indexes also diminished in winter. The magnitude of T b and fluctuations of activity differed between the two studied familial groups, probably due …

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