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Acta Theriologica

, Volume 52, Issue 1, pp 55–64 | Cite as

Temporal and spatial differences in the emission of calls by pipistrelle batsPipistrellus pipistrellus andP. pygmaeus

  • Nick C. Downs
  • Paul A. Racey
Article

Abstract

The number of orientation, feeding and social calls emitted by pipistrelle batsPipistrellus pipistrellus Schreber, 1774 andP. pygmaeus Leach, 1825 was recorded throughout the night at eight different sites. Social calls were unaffected by weather variables, whereas orientation calls and feeding buzzes were both significantly affected by cloud and temperature conditions. The number of emissions of each call type was significantly different between sites, indicating that the bats used different sites for different activities. Significant positive correlations between all three combinations of call types occurred only during the middle of the night, corresponding with the nadir of flying insects. This suggests that bats were engaged in activities other than feeding at this time, such as territory protection or mate attraction.

Key words

Pipistrelle bats social echolocation 

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Copyright information

© Mammal Research Institute, Bialowieza, Poland 2007

Authors and Affiliations

  1. 1.School of Biological Sciences, Tillydrone AvenueUniversity of AberdeenAberdeenUK

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