Modulation rate transfer functions from four species of stranded odontocete (Stenella longirostris, Feresa attenuata, Globicephala melas, and Mesoplodon densirostris)
| Autor: | Adam B. Smith, Aude F. Pacini, Paul E. Nachtigall |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
030110 physiology
0301 basic medicine Male Physiology Dolphins Zoology Human echolocation 01 natural sciences Pilot whale 03 medical and health sciences Behavioral Neuroscience Beaked whale biology.animal 0103 physical sciences Animals 010301 acoustics Ecology Evolution Behavior and Systematics biology Whale Whales Signal Processing Computer-Assisted biology.organism_classification Globicephala melas Mesoplodon densirostris Feresa attenuata Stenella longirostris Auditory Perception Evoked Potentials Auditory Animal Science and Zoology |
| Zdroj: | Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology. 204(4) |
| ISSN: | 1432-1351 |
| Popis: | Odontocete marine mammals explore the environment by rapidly producing echolocation signals and receiving the corresponding echoes, which likewise return at very rapid rates. Thus, it is important that the auditory system has a high temporal resolution to effectively process and extract relevant information from click echoes. This study used auditory evoked potential methods to investigate auditory temporal resolution of individuals from four different odontocete species, including a spinner dolphin (Stenella longirostris), pygmy killer whale (Feresa attenuata), long-finned pilot whale (Globicephala melas), and Blainville’s beaked whale (Mesoplodon densirostris). Each individual had previously stranded and was undergoing rehabilitation. Auditory Brainstem Responses (ABRs) were elicited via acoustic stimuli consisting of a train of broadband tone pulses presented at rates between 300 and 2000 Hz. Similar to other studied species, modulation rate transfer functions (MRTFs) of the studied individuals followed the shape of a low-pass filter, with the ability to process acoustic stimuli at presentation rates up to and exceeding 1250 Hz. Auditory integration times estimated from the bandwidths of the MRTFs ranged between 250 and 333 µs. The results support the hypothesis that high temporal resolution is conserved throughout the diverse range of odontocete species. |
| Databáze: | OpenAIRE |
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