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Active space of grasshopper mouse vocalizations (Onychomys) in relation to woody plant encroachment.

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Title: Active space of grasshopper mouse vocalizations (Onychomys) in relation to woody plant encroachment.
Authors: Green, Dana M. (AUTHOR), Mull, Nathaniel (AUTHOR), Scolman, Tucker (AUTHOR), Griffiths, Grace (AUTHOR), Pasch, Bret (AUTHOR)
Source: Behaviour. Nov2020, Vol. 157 Issue 14/15, p1211-1229. 19p.
Subjects: Sounds, Grasshoppers, Transmission of sound, Acoustic wave propagation, Animal communication, Woody plants
Geographic Terms: United States
Abstract: The efficacy of animal acoustic communication depends on signal transmission through an oft-cluttered environment. Anthropogenic-induced changes in vegetation may affect sound propagation and thus habitat quality, but few studies have explored this hypothesis. In the southwestern United States, fire suppression and cattle grazing have facilitated displacement of grasslands by pinyon-juniper woodlands. Northern grasshopper mice (Onychomys leucogaster) inhabit regions impacted by juniper encroachment and produce long-distance vocalizations to advertise their presence to conspecifics. In this study, we coupled acoustic recordings and electrophysiological measurements of hearing sensitivity from wild mice in the laboratory with sound transmission experiments of synthesized calls in the field to estimate the active space (maximum distance that stimuli are detected) of grasshopper mouse vocalizations. We found that mice can detect loud (85 dB SPL at 1 m) 11.6 kHz vocalizations at 28 dB SPL. Sound transmission experiments revealed that signal active space is approximately 50 m. However, we found no effect of woody plant encroachment on call propagation because juniper and woody plant density were inversely associated and both present barriers to a 9 cm mouse advertising at ground level. Our data indicate that woody plant encroachment does not directly impact the efficacy of grasshopper mouse communication, but vegetation shifts may negatively impact mice via alternative mechanisms. Identifying the maximum distance that vocalizations function provides an important metric to understand the ecological context of species-specific signalling and potential responses to environmental change. [ABSTRACT FROM AUTHOR]
Copyright of Behaviour is the property of Brill Academic Publishers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Active space of grasshopper mouse vocalizations (Onychomys) in relation to woody plant encroachment.
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  Data: <searchLink fieldCode="JN" term="%22Behaviour%22">Behaviour</searchLink>. Nov2020, Vol. 157 Issue 14/15, p1211-1229. 19p.
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  Data: <searchLink fieldCode="DE" term="%22United+States%22">United States</searchLink>
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  Data: The efficacy of animal acoustic communication depends on signal transmission through an oft-cluttered environment. Anthropogenic-induced changes in vegetation may affect sound propagation and thus habitat quality, but few studies have explored this hypothesis. In the southwestern United States, fire suppression and cattle grazing have facilitated displacement of grasslands by pinyon-juniper woodlands. Northern grasshopper mice (Onychomys leucogaster) inhabit regions impacted by juniper encroachment and produce long-distance vocalizations to advertise their presence to conspecifics. In this study, we coupled acoustic recordings and electrophysiological measurements of hearing sensitivity from wild mice in the laboratory with sound transmission experiments of synthesized calls in the field to estimate the active space (maximum distance that stimuli are detected) of grasshopper mouse vocalizations. We found that mice can detect loud (85 dB SPL at 1 m) 11.6 kHz vocalizations at 28 dB SPL. Sound transmission experiments revealed that signal active space is approximately 50 m. However, we found no effect of woody plant encroachment on call propagation because juniper and woody plant density were inversely associated and both present barriers to a 9 cm mouse advertising at ground level. Our data indicate that woody plant encroachment does not directly impact the efficacy of grasshopper mouse communication, but vegetation shifts may negatively impact mice via alternative mechanisms. Identifying the maximum distance that vocalizations function provides an important metric to understand the ecological context of species-specific signalling and potential responses to environmental change. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Behaviour is the property of Brill Academic Publishers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1163/1568539X-bja10046
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      – Code: eng
        Text: English
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      – SubjectFull: Acoustic wave propagation
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      – SubjectFull: Animal communication
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      – SubjectFull: Woody plants
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      – SubjectFull: United States
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      – TitleFull: Active space of grasshopper mouse vocalizations (Onychomys) in relation to woody plant encroachment.
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            NameFull: Green, Dana M.
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            NameFull: Mull, Nathaniel
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            NameFull: Scolman, Tucker
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            – D: 01
              M: 11
              Text: Nov2020
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              Value: 157
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