Development of vocalizations in the flat-headed bats, Tylonycteris pachypus and T. robustula (Chiroptera : Vespertilionidae)

Zhang, LB, Jones, G, Parsons, Stuart, Liang, B, & Zhang, SY (2005) Development of vocalizations in the flat-headed bats, Tylonycteris pachypus and T. robustula (Chiroptera : Vespertilionidae). ACTA CHIROPTEROLOGICA, 7, pp. 91-99.

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Abstract

The development of vocalizations during postnatal growth in the flat-headed bats, Tylonycteris pachypus and T. robustula in South China is described. Females of both species gave birth to twins at the end of May, and the infants flew in the last ten days of June. Vocalizations served as precursors to echolocation calls and as isolation calls (i-calls) used to attract mothers. As the infants grew, the frequency of i-calls and precursor calls increased. The duration of i-calls increased little before 6-day old and then decreased. At the same time, the duration of echolocation precursor calls decreased. The directive calls that the mother or the infant emitted when searching for each other are also described. Female directive calls are lower in frequency and longer in duration than their echolocation calls, and the duration of infant directive calls is longer than those of the i-calls and precursor calls.

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ID Code: 79777
Item Type: Journal Article
Refereed: Yes
DOI: 10.3161/1733-5329(2005)7[91:DOVITF]2.0.CO;2
Copyright Owner: BioOne
Deposited On: 21 Jan 2015 22:52
Last Modified: 06 Feb 2015 02:12

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