Hearing, vocalization and the external ear of a marsupial, the Northern Quoll, Dasyurus hallucatus
- 15 November 1994
- journal article
- research article
- Published by Wiley in Journal of Comparative Neurology
- Vol. 349 (3) , 377-388
- https://doi.org/10.1002/cne.903490305
Abstract
As part of a continuing study of the development of the marsupial auditory system, auditory brainstem responses (ABR) were recorded and an ABR audiogram was constructed for five female Northern Quolls (Dasyurus hallucatus), which are nocturnal carnivores. The best frequency for hearing lies between 8 and 10 kHz, and at 50 dB SPL there is a range from about 0.5 to 40 kHz.Vocalizations of adult quolls and pouch‐young were recorded with a digital audio tape recorder, and the power spectra of representative calls were compared with the ABR audiogram. The common adult vocalization have most energy at the lower end of the hearing range, whereas frequencies that are dominant in the isolation calls of the pouch‐young lie close to the best frequency of hearing.Samples of nocturnal sounds of the habitat of the quoll were also recorded and analyzed. Power spectra have peak energy at frequencies between 2 and 5 kHz, with a smaller contribution above 10 kHz. The spectrum contains relatively little power at the best frequency of hearing.Measurements of the sound pressure level at the external ear canal as a function of stimulus frequency and location in space suggest that the directional amplifying properties of the pinna will operate most effectively on sound frequencies at the upper end of the quoll's hearing range, a region that may be important in prey detection.Comparisons are made with other mammalian nocturnal carnivores and with other marsupials. We speculate that, for nocturnal carnivores, one role of the low‐frequency part of the hearing range concerns the recognition of adult conspecifics, the mid‐frequency range is important for the detection of pouch‐young, and the upper range may be particularly concerned with prey/predator detect on.Keywords
This publication has 57 references indexed in Scilit:
- Neurogenesis in the brain auditory pathway of a marsupial, the northern native cat (dasyurus hallucatus)Journal of Comparative Neurology, 1991
- The auditory periphery of the ferret. I: Directional response properties and the pattern of interaural level differencesThe Journal of the Acoustical Society of America, 1990
- Paediatric Auditory Brainstem Response and Pure-Tone Audiometry: Threshold ComparisonsA Study of 142 Difficult-to-test ChildrenScandinavian Audiology, 1989
- Vocalizations of the Siberian Ferret (Mustela eversmanni) and Comparisons with Other MustelidsJournal of Mammalogy, 1987
- Hearing in Mammals: The Least WeaselJournal of Mammalogy, 1985
- Control of Pinna Movements and Sensorimotor Register in Cat Superior ColliculusBrain, Behavior and Evolution, 1981
- Hearing in Glires: Domestic rabbit, cotton rat, feral house mouse, and kangaroo ratThe Journal of the Acoustical Society of America, 1980
- The Behavior of Communicating: An Analysis of the 22 kHz Call of Rats (Rattus Norvegicus)American Zoologist, 1979
- Vocalization in the cat and kittenDevelopmental Psychobiology, 1978
- On the Sound Pressure Transformation by the Head and Auditory Meatus Op the CatActa Oto-Laryngologica, 1966