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Ramsier, Marissa A.; Cunningham, Andrew J.; Moritz, Gillian L.; Finneran, James J.; Williams, Cathy V.; Ong, Perry S.; Gursky-Doyen, Sharon L.; Dominy, Nathaniel J.
Biology letters (2005), 08/2012, Letnik: 8, Številka: 4Journal Article
Few mammals—cetaceans, domestic cats and select bats and rodents—can send and receive vocal signals contained within the ultrasonic domain, or pure ultrasound (greater than 20 kHz). Here, we use the auditory brainstem response (ABR) method to demonstrate that a species of nocturnal primate, the Philippine tarsier (Tarsius syrichta), has a high-frequency limit of auditory sensitivity of ca 91 kHz. We also recorded a vocalization with a dominant frequency of 70 kHz. Such values are among the highest recorded for any terrestrial mammal, and a relatively extreme example of ultrasonic communication. For Philippine tarsiers, ultrasonic vocalizations might represent a private channel of communication that subverts detection by predators, prey and competitors, enhances energetic efficiency, or improves detection against low-frequency background noise.
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