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Echolocation in a Nocturnal Primate?

Sharon Gursky1

  • 1Department of Anthropology, Texas A&M University, College Station, Texas, USA, GURSKY@TAMU.EDU.

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|August 16, 2019
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Summary
This summary is machine-generated.

Gursky's spectral tarsiers may use ultrasonic calls for navigation. These high-frequency sounds, emitted before movement, suggest a role in spatial orientation, similar to echolocation in bats.

Keywords:
IndonesiaPrimateTarsiusUltrasonic callsVocalisation

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Area of Science:

  • Primatology
  • Bioacoustics
  • Animal Behavior

Background:

  • Gursky's spectral tarsiers produce ultrasonic vocalizations.
  • High-frequency sounds have limited travel distance, suggesting specialized functions.
  • Potential functions include navigation or communication over short distances.

Purpose of the Study:

  • To investigate the function of ultrasonic calls in Gursky's spectral tarsiers.
  • To determine if these calls are used for navigation during locomotion.
  • To analyze the types of ultrasonic calls emitted during different behaviors.

Main Methods:

  • Field study conducted at Tangkoko Nature Reserve, Indonesia.
  • Focal follows and ultrasonic vocalization recordings using a Wildlife Acoustics Ultrasonic Song Meter BAT3.
  • Analysis of call timing relative to locomotor activity and behavioral context.

Main Results:

  • Approximately 42% of ultrasonic calls preceded locomotor activity.
  • Ultrasonic calls were significantly more frequent during locomotion than other behaviors.
  • Specific call types (trills, frequency-modulated) were exclusively associated with locomotion, particularly leaping.

Conclusions:

  • Preliminary evidence suggests Gursky's spectral tarsiers utilize ultrasonic calls for navigation.
  • The findings contribute to understanding the evolution of echolocation in mammals.
  • Further research on echolocation in non-bat primates is crucial.