Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti
Baleen whales (Mysticeti) are known to use low frequencies (LF; 200 Hz and below) and infrasound (< 20 Hz) for communication. The lowest hearing limits of toothed whales (Odontoceti), which are able to produce ultrasound (> 20 kHz), reach low frequencies. Researchers have tried to understand t...
Published in: | Fossil Record |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Pensoft Publishers
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/fr-21-33-2018 https://doaj.org/article/f33bc2ba732243a8bdc031ab31c99e71 |
id |
ftdoajarticles:oai:doaj.org/article:f33bc2ba732243a8bdc031ab31c99e71 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:f33bc2ba732243a8bdc031ab31c99e71 2024-02-04T09:59:08+01:00 Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti I. S. Ritsche J. M. Fahlke F. Wieder A. Hilger I. Manke O. Hampe 2018-01-01T00:00:00Z https://doi.org/10.5194/fr-21-33-2018 https://doaj.org/article/f33bc2ba732243a8bdc031ab31c99e71 EN eng Pensoft Publishers https://www.foss-rec.net/21/33/2018/fr-21-33-2018.pdf https://doaj.org/toc/2193-0066 https://doaj.org/toc/2193-0074 doi:10.5194/fr-21-33-2018 2193-0066 2193-0074 https://doaj.org/article/f33bc2ba732243a8bdc031ab31c99e71 Fossil Record, Vol 21, Pp 33-45 (2018) Paleontology QE701-760 article 2018 ftdoajarticles https://doi.org/10.5194/fr-21-33-2018 2024-01-07T01:45:56Z Baleen whales (Mysticeti) are known to use low frequencies (LF; 200 Hz and below) and infrasound (< 20 Hz) for communication. The lowest hearing limits of toothed whales (Odontoceti), which are able to produce ultrasound (> 20 kHz), reach low frequencies. Researchers have tried to understand the evolution of LF and infrasonic hearing in mysticetes by linking the shape of the inner ear cochlea or individual cochlear measurements to known hearing frequencies and making inferences to extinct species. Using landmark-based shape analysis of complete cochlear coiling, we show that cochlear coiling shape correlates with LF and high-frequency (HF; > 10 kHz) hearing limits in cetaceans. Very LF ( ≤ 50 Hz) and infrasonic hearing are associated with, for example, a protruding second turn, a descending apex, and a high number of turns. Correlations between cochlear and cranial variables and cochlear and cranial shape indicate that low LF hearing limits are furthermore connected to longer cochleae and relatively larger cranial widths. Very LF hearing in Mysticeti appeared in the middle Miocene, and mysticete infrasonic hearing had evolved by the late Miocene. Complete cochlear coiling is suitable for estimating hearing limits in cetaceans, closely approximated by cochlear length times number of cochlear turns. Article in Journal/Newspaper baleen whales toothed whales Directory of Open Access Journals: DOAJ Articles Fossil Record 21 1 33 45 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Paleontology QE701-760 |
spellingShingle |
Paleontology QE701-760 I. S. Ritsche J. M. Fahlke F. Wieder A. Hilger I. Manke O. Hampe Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
topic_facet |
Paleontology QE701-760 |
description |
Baleen whales (Mysticeti) are known to use low frequencies (LF; 200 Hz and below) and infrasound (< 20 Hz) for communication. The lowest hearing limits of toothed whales (Odontoceti), which are able to produce ultrasound (> 20 kHz), reach low frequencies. Researchers have tried to understand the evolution of LF and infrasonic hearing in mysticetes by linking the shape of the inner ear cochlea or individual cochlear measurements to known hearing frequencies and making inferences to extinct species. Using landmark-based shape analysis of complete cochlear coiling, we show that cochlear coiling shape correlates with LF and high-frequency (HF; > 10 kHz) hearing limits in cetaceans. Very LF ( ≤ 50 Hz) and infrasonic hearing are associated with, for example, a protruding second turn, a descending apex, and a high number of turns. Correlations between cochlear and cranial variables and cochlear and cranial shape indicate that low LF hearing limits are furthermore connected to longer cochleae and relatively larger cranial widths. Very LF hearing in Mysticeti appeared in the middle Miocene, and mysticete infrasonic hearing had evolved by the late Miocene. Complete cochlear coiling is suitable for estimating hearing limits in cetaceans, closely approximated by cochlear length times number of cochlear turns. |
format |
Article in Journal/Newspaper |
author |
I. S. Ritsche J. M. Fahlke F. Wieder A. Hilger I. Manke O. Hampe |
author_facet |
I. S. Ritsche J. M. Fahlke F. Wieder A. Hilger I. Manke O. Hampe |
author_sort |
I. S. Ritsche |
title |
Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
title_short |
Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
title_full |
Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
title_fullStr |
Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
title_full_unstemmed |
Relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in Miocene Mysticeti |
title_sort |
relationships of cochlear coiling shape and hearing frequencies in cetaceans, and the occurrence of infrasonic hearing in miocene mysticeti |
publisher |
Pensoft Publishers |
publishDate |
2018 |
url |
https://doi.org/10.5194/fr-21-33-2018 https://doaj.org/article/f33bc2ba732243a8bdc031ab31c99e71 |
genre |
baleen whales toothed whales |
genre_facet |
baleen whales toothed whales |
op_source |
Fossil Record, Vol 21, Pp 33-45 (2018) |
op_relation |
https://www.foss-rec.net/21/33/2018/fr-21-33-2018.pdf https://doaj.org/toc/2193-0066 https://doaj.org/toc/2193-0074 doi:10.5194/fr-21-33-2018 2193-0066 2193-0074 https://doaj.org/article/f33bc2ba732243a8bdc031ab31c99e71 |
op_doi |
https://doi.org/10.5194/fr-21-33-2018 |
container_title |
Fossil Record |
container_volume |
21 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
45 |
_version_ |
1789963796422328320 |