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Research at St Andrews

A 2.6-gram sound and movement tag for studying the acoustic scene and kinematics of echolocating bats

Research output: Contribution to journalArticle

DOI

Open Access Status

  • Embargoed (until 11/11/19)

Author(s)

Laura Stidsholt, Mark Johnson, Kristian Beedholm, Lasse Jakobsen, Kathrin Kugler, Signe Brinkløv, Angeles Salles, Cynthia F. Moss, Peter Teglberg Madsen

School/Research organisations

Abstract

1. To study sensorimotor behaviour in wild animals, it is necessary to synchronously record the sensory inputs available to the animal, and its movements. To do this, we have developed a biologging device that can record the primary sensory information and the associated movements during foraging and navigating in echolocating bats.

2. This 2.6 -gram tag records the sonar calls and echoes from an ultrasonic microphone, while simultaneously sampling fine-scale movement in three dimensions from wideband accelerometers and magnetometers. In this study, we tested the tag on an European noctula (Nyctalus noctula) during target approaches and on four big brown bats (Eptesicus fuscus) during prey interception in a flight room.

3. We show that the tag records both the outgoing calls and echoes returning from objects at biologically relevant distances. Inertial sensor data enables the detection of behavioural events such as flying, turning, and resting. In addition, individual wing-beats can be tracked and synchronized to the bat's sound emissions to study the coordination of different motor events.

4. By recording the primary acoustic flow of bats concomitant with associated behaviours on a very fine time-scale, this type of biologging method will foster a deeper understanding of how sensory inputs guide feeding behaviours in the wild.
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Details

Original languageEnglish
Number of pages11
JournalMethods in Ecology and Evolution
VolumeEarly View
Early online date11 Nov 2018
DOIs
StateE-pub ahead of print - 11 Nov 2018

    Research areas

  • Archival tag, Auditory scene, Bat echolocation, Biologging, Echogram, Echoic scene, Flight kinematics, Inertial sensors

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