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Acoustic emissions of Sorex unguiculatus (Mammalia: Soricidae): Assessing the echo‐based orientation hypothesis

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Title: Acoustic emissions of Sorex unguiculatus (Mammalia: Soricidae): Assessing the echo‐based orientation hypothesis
Other Titles: Ecol Evol
Authors: Sanchez, Lida Browse this author
Ohdachi, Satoshi D Browse this author →KAKEN DB
Kawahara, Atsushi Browse this author
Echenique‐Diaz, Lazaro M. Browse this author
Maruyama, Shinichiro Browse this author
Kawata, Masakado Browse this author
Keywords: echolocation
habitat acoustics
the long‐clawed shrew
vocal behavior
Issue Date: 15-Feb-2019
Journal Title: Ecology and evolution
Volume: 9
Issue: 5
Start Page: 2629
End Page: 2639
Publisher DOI: 10.1002/ece3.4930
Abstract: Shrew species have been proposed to utilize an echo‐based orientation system to obtain additional acoustic information while surveying their environments. This system has been supported by changes in vocal emission rates when shrews encounter different habitats of varying complexity, although detailed acoustic features in this system have not been reported. In this study, behavioral experiments were conducted using the long‐clawed shrew (Sorex unguiculatus) to assess this orientation system. Three experimental conditions were set, two of which contained obstacles. Short‐click, noisy, and different types of tonal calls in the audible‐to‐ultrasonic frequency range were recorded under all experimental conditions. The results indicated that shrews emit calls more frequently when they are facing obstacles or exploring the experimental environment. Shrews emitted clicks and several different types of tonal calls while exploring, and modified the use of different types of calls for varying behavior. Furthermore, shrews modified the dominant frequency and duration of squeak calls for different types of obstacles, that is, plants and acrylic barriers. The vocalizations emitted at short inter‐pulse intervals could not be observed when shrews approached these obstacles. These results are consistent with the echobased orientation hypothesis according to which shrews use a simple echo‐orientation system to obtain information from their surrounding environments, although further studies are needed to confirm this hypothesis.
Rights: Sanchez L, Ohdachi SD, Kawahara A, Echenique‐Diaz LM, Maruyama S, Kawata M. Acoustic emissions of Sorex unguiculatus (Mammalia: Soricidae): Assessing the echo‐based orientation hypothesis. Ecol Evol. 2019;9(5):2629–2639. © 2019 The Authors.
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 大舘 智志

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