Auditory-vocal coupling in the naked mole-rat, a mammal with poor auditory thresholds
| Autor: | Thomas J. Park, Robert J. Dooling, Daniel T. Applegate, Shigeto Yosida, Catherine M. Barone, Kazuo Okanoya, Elizabeth F. Brittan-Powell |
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| Rok vydání: | 2018 |
| Předmět: |
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medicine.medical_specialty Sound Spectrography Vocal communication Physiology Biology Audiology Alarm signal 01 natural sciences 03 medical and health sciences Behavioral Neuroscience 0302 clinical medicine 0103 physical sciences Evoked Potentials Auditory Brain Stem otorhinolaryngologic diseases medicine Animals Auditory threshold Social Behavior 010301 acoustics Auditory thresholds Ecology Evolution Behavior and Systematics Naked mole-rat Original Paper Mole Rats Signature call Auditory brainstem response Acoustics Audiogram biology.organism_classification Coupling (electronics) Auditory Perception Female Animal Science and Zoology Mammal Vocalization Animal Alarm call Gerbillinae 030217 neurology & neurosurgery Brain Stem |
| Zdroj: | Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology |
| ISSN: | 1432-1351 0340-7594 |
| DOI: | 10.1007/s00359-018-1287-8 |
| Popis: | Naked mole-rats are extremely social and extremely vocal rodents, displaying a wide range of functionally distinct call types and vocalizing almost continuously. Their vocalizations are low frequency, and a behavioral audiogram has shown that naked mole-rats, like other subterranean mammals, hear only low frequencies. Hence, the frequency range of their hearing and vocalizations appears to be well matched. However, even at low frequencies, naked mole-rats show very poor auditory thresholds, suggesting vocal communication may be effective only over short distances. However, in a tunnel environment where low frequency sounds propagate well and background noise is low, it may be that vocalizations travel considerable distances at suprathreshold intensities. Here, we confirmed hearing sensitivity using the auditory brainstem response; we characterized signature and alarm calls in intensity and frequency domains and we measured the effects of propagation through tubes with the diameter of naked mole-rat tunnels. Signature calls-used for intimate communication-could travel 3-8 m at suprathreshold intensities, and alarm calls (lower frequency and higher intensity), could travel up to 15 m. Despite this species' poor hearing sensitivity, the naked mole-rat displays a functional, coupled auditory-vocal communication system-a hallmark principle of acoustic communication systems across taxa. |
| Databáze: | OpenAIRE |
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