Babbling behavior in the sac-winged bat (Saccopteryx bilineata) (original) (raw)

Abstract

Infant babbling in humans and a few other primates plays an important role in allowing the young to practice the adult vocal repertoire during early behavioral development. Vocalizations uttered during babbling resemble, to some degree, the acoustic structure of adult vocalizations and are often produced in long bouts independent of any social context. Similar behavior, termed subsong or plastic song, is known from a variety of songbirds. Here, we show that pups of the sac-winged bat (Saccopteryx bilineata), a species with an unusually large vocal repertoire, produce renditions of all known adult vocalization types during bouts of vocalizations, which appear to be independent of a distinct social context. Babbling occurs in pups of both sexes, even though only adult males, not females, utter all different vocalization types produced in infancy. To our knowledge, this is the first evidence of babbling in a nonprimate mammal and suggests that infant babbling may be necessary for the ontogeny of complex vocal repertoires.

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Acknowledgements

We want to thank Martina Nagy for participating in field data acquisition. Mark Bee, Thomas Friedl, Marc Holderied, Georg Klump, Ulrike Langemann, Frieder Mayer, and Christian Voigt made most helpful comments during discussions on the topic and the manuscript. We also want to thank Marc Holderied, Nic Kontratieff, Wolfram Schulze, Stefan Schuster, and Frieder Mayer for technical support and helpful suggestions. La Selva Biological Station and the Organization for Tropical Studies (OTS) provided sophisticated infrastructure for fieldwork. We also thank the Costa Rican authorities, especially Javier Guevara and the Parque Nacional Braulio Carillo, for support and research permissions. This study was supported by the University of Erlangen. All fieldwork complied with the current laws of Costa Rica.

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1. Institute for Zoology II, University of Erlangen-Nuernberg, Staudtstr. 5, 91058, Erlangen, Germany
   Mirjam Knörnschild, Oliver Behr & Otto von Helversen

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1. Mirjam Knörnschild
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2. Oliver Behr
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3. Otto von Helversen
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Correspondence toMirjam Knörnschild.

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Knörnschild, M., Behr, O. & von Helversen, O. Babbling behavior in the sac-winged bat (Saccopteryx bilineata).Naturwissenschaften 93, 451–454 (2006). https://doi.org/10.1007/s00114-006-0127-9

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• Received: 26 September 2005
• Accepted: 18 April 2006
• Published: 31 May 2006
• Issue Date: September 2006
• DOI: https://doi.org/10.1007/s00114-006-0127-9

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