Measuring airborne components of seismic body vibrations in a Middle-Asian sand-dwelling Insectivora species, the piebald shrew (Diplomesodon pulchellum)статья

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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.

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[1] Measuring airborne components of seismic body vibrations in a middle-asian sand-dwelling insectivora species, the piebald shrew (diplomesodon pulchellum) / I. A. Volodin, A. S. Zaytseva, O. G. Ilchenko et al. // Journal of Experimental Biology. — 2012. — Vol. 215, no. 16. — P. 2849–2852. Self-produced seismic vibrations have been found for some subterranean rodents and not reported for any Insectivora species, although seismic sensitivity has been confirmed for blind sand-dwelling chrysochlorid golden moles. Studying vocal behaviour of captive piebald shrews Diplomesodon pulchellum, we documented vibrations, apparently generated by the whole-body wall muscles, from 11 (5 male, 6 female) of 19 animals, placed singly on a drum membrane. The airborne waves of the vibratory drumming were digitally recorded and then analyzed spectrographically. The mean frequency of vibration was 160.5 Hz. This frequency matched the periodicity of the deep sinusoidal frequency modulation (159.4 Hz), found in loud screech calls of the same subjects. The body vibration was not related to thermoregulation, hunger-related depletion of energy resources or fear, as it was produced by well-fed, calm animals, at warm ambient temperatures. We hypothesize, that in the solitary, nocturnal, digging desert piebald shrew, body vibrations may serve for seismic exploration of substrate density, to avoid energy-costly digging of packed sand for burrowing and foraging. At the same time, the piercing quality of screech calls due to the deep the sinusoidal frequency modulation, matching periodicity of body vibration, may be important for agonistic communication in this species. [ DOI ]

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