Echolocation behaviour of Phyllops falcatus (Chiroptera: Phyllostomidae): unusual frequency range of the first harmonic

• Autorzy: Macias S. , Mora E. C. , Koch C. , von Helversen O.
• Języki publikacji: EN

Abstrakty

EN

We studied the echolocation calls emitted by Phyllops falcatus (Chiroptera: Phyllostomidae) during foraging, in the field and in the lab. Calls emitted in free flight, in a more or less uncluttered situation, were about 4.5 ms (up to 5.3 ms) long and characterized by a sweep of the first harmonic (= fundamental) from ca. 73 kHz down to about 23 kHz, which is unusually large for phyllostomid bats. A less intense second harmonic was always present. The intervals between pulses varied between 55 and 170 ms with a mean of about 110 ms. During approach to bushes or trees (or during flight in confined space between bushes), or in the flight room, calls became shorter (ca. 2 ms) and more energy was allocated to the second harmonic, sometimes also a third harmonic appeared. During approach to a fruit calls were further shortened (about 1 ms or less), and call frequency increased to about 5 calls/100 ms, calls often being grouped. The large bandwidth of the first harmonic separates Phyllops from all other Cuban bat species and allows identification in the field.

• Wydawca: -
• Czasopismo: Acta Chiropterologica
• Rocznik: 2005
• Tom: 07
• Numer: 2
• Opis fizyczny: p.275-283,fig.,ref.

Twórcy

autor

Macias S.

• Department of Animal and Human Biology, Faculty of Biology, Havana University, Havana, Cuba

autor

Mora E. C.

autor

Koch C.

autor

von Helversen O.

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