Echolocation calls of the long-tailed bat: A quantitative analysis of types of calls

S Parsons; C. W Thorpe; S. M Dawson

doi:10.2307/1382956

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Echolocation calls of the long-tailed bat: A quantitative analysis of types of calls

Journal article

Peer reviewed

Echolocation calls of the long-tailed bat: A quantitative analysis of types of calls

S Parsons, C. W Thorpe and S. M Dawson

Journal of Mammalogy, Vol.78(3), pp.964-976

1997

DOI: https://doi.org/10.2307/1382956

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Abstract

Chalinolobus tuberculatus

echolocation

type of call

multivariate analysis

ambiguity

The echolocation calls of long-tailed bats (Chalinolobus tuberculatus) were recorded in the Eglinton Valley, Fiordland, New Zealand, and digitized for analysis with signal-processing software. Univariate and multivariate analyses of measured features facilitated a quantitative classification of the calls. Cluster analysis was used to categorize calls into two groups equating to search and terminal-buzz calls described qualitatively for other species. When moving from search to tenninal phases, the calls decrease in bandwidth, maximum and minimum frequency of call. and duration. Search calls begin with a steep-downward FM sweep followed by a short. less-modulated component. Buzz calls are FM sweeps. Although not found quantitatively, a broadband pre-buzz group of calls also was identified. Ambiguity analysis of calls from the three groups shows that search-phase calls are well suited to resolving the velocity of targets, and hence. identifying moving targets in stationary clutter. Pre-buzz and buzz calls are better suited to resolving range, a feature that may aid the bats in capture of evasive prey after it has been identified.

Details

Title: Echolocation calls of the long-tailed bat: A quantitative analysis of types of calls
Authors: S Parsons (Author) - University of Otago
C. W Thorpe (Author) - McGill University
S. M Dawson (Author) - University of Otago
Publication details: Journal of Mammalogy, Vol.78(3), pp.964-976
Publisher: Oxford University Press
DOI: 10.2307/1382956
ISSN: 1545-1542
Organisation Unit: School of Science, Technology and Engineering; University of the Sunshine Coast, Queensland
Language: English
Record Identifier: 99576106402621
Output Type: Journal article

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Web Of Science research areas: Zoology

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