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Determinants of echolocation click frequency characteristics in small toothed whales: recent advances from anatomical information
| Title: | Determinants of echolocation click frequency characteristics in small toothed whales: recent advances from anatomical information |
| Authors: | KURODA, Mika1 Browse this author | | MIKI, Nobuhiro2 Browse this author →KAKEN DB | | MATSUISHI, Takashi3 Browse this author →KAKEN DB |
| Authors(alt): | 黒田, 実加1 | | 三木, 信弘2 | | 松石, 隆3 |
| Keywords: | anatomy | | CT scan | | dolphin | | echolocation clicks | | Odontoceti (toothed whales) | | porpoise | | vestibular sacs |
| Issue Date: | 10-Sep-2020 |
| Publisher: | Wiley |
| Journal Title: | Mammal Review |
| Volume: | 50 |
| Issue: | 4 |
| Start Page: | 413 |
| End Page: | 425 |
| Publisher DOI: | 10.1111/mam.12212 |
| Abstract: | 1. The pulse-like clicking sounds made by odontocetes for echolocation (biosonar) can be roughly classified by their frequency characteristics into narrow-band high-frequency (NBHF) clicks with a sharp peak at around 130 kHz and wide-band (WB) clicks with a moderate peak at 30–100 kHz. Structural differences in the sound-producing organs between NBHF species and WB species have not been comprehensively discussed, nor has the formation of NBHF and WB clicks.
2. A review of the sound-producing organs, including the latest findings, could lead to a new hypothesis about the sound production mechanisms. In the current review, data on echolocation click characteristics and on the anatomical structure of the sound-producing organs were compared in 33 species (14 NBHF species and 19 WB species).
3. We review interspecific information on the characteristics of click frequencies and data from computed tomography scans and morphology of the sound-producing organs, accumulated in conventional studies. The morphology of several characteristic structures, such as the melon, the dense connective tissue over the melon (the ‘porpoise capsule’), and the vestibular sacs, was compared interspecifically.
4. Interspecific comparisons suggest that the presence or absence of the porpoise capsule is unlikely to affect echolocation frequency. Folded structures in the vestibular sacs, features that have been overlooked until now, are present in most species with NBHF sound production and not in WB species; the vestibular sacs are therefore likely to be important in determining echolocation click frequency characteristics. The acoustical properties of the shape of the melon and vestibular sacs are important topics for future investigations about the relationship between anatomical structure and sound-producing mechanisms for echolocation clicks. |
| Rights: | This is the peer reviewed version of the following article: Kuroda, M., Miki, N. and Matsuishi, T.F. (2020), Determinants of echolocation click frequency characteristics in small toothed whales: recent advances from anatomical information. Mam Rev. doi:10.1111/mam.12212, which has been published in final form at https://doi.org/10.1111/mam.12212. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82837 |
| Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 松石 隆
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