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Vocalization of the shrew Suncus etruscus and Crocidura during normothermia and torpor
The vocalization of the shrews Suncus etruscus and Crocidura russula during normothermia and torpor is investigated. While frequency and call duration are independent of body temperature, the tremolo structure shows a spreading correlated with falling body temperature. The particular calls emitted during torpor are defence calls, modified by merely physiological factors. Their main function might be of intraspecific nature
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