Eocene evolution of whale hearing
The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates. As the earliest whales became obligately marine, all of their organ systems adapted to the new environment. The fossil record indicates that this evolutionary transition took less...
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ftindianacasci:oai:repository.ias.ac.in:4644 2023-05-15T18:33:30+02:00 Eocene evolution of whale hearing Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor 2004-08-12 application/pdf http://repository.ias.ac.in/4644/ http://repository.ias.ac.in/4644/1/318.pdf http://www.nature.com/nature/journal/v430/n7001/full/nature02720.html unknown Nature Publishing Group http://repository.ias.ac.in/4644/1/318.pdf Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor (2004) Eocene evolution of whale hearing Nature, 430 (7001). pp. 776-778. ISSN 0028-0836 Article PeerReviewed 2004 ftindianacasci 2013-01-20T09:37:47Z The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates. As the earliest whales became obligately marine, all of their organ systems adapted to the new environment. The fossil record indicates that this evolutionary transition took less than 15 million years, and that different organ systems followed different evolutionary trajectories. Here we document the evolutionary changes that took place in the sound transmission mechanism of the outer and middle ear in early whales. Sound transmission mechanisms change early on in whale evolution and pass through a stage (in pakicetids) in which hearing in both air and water is unsophisticated. This intermediate stage is soon abandoned and is replaced (in remingtonocetids and protocetids) by a sound transmission mechanism similar to that in modern toothed whales. The mechanism of these fossil whales lacks sophistication, and still retains some of the key elements that land mammals use to hear airborne sound. Article in Journal/Newspaper toothed whales Indian Academy of Sciences: Publication of Fellows |
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Indian Academy of Sciences: Publication of Fellows |
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The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates. As the earliest whales became obligately marine, all of their organ systems adapted to the new environment. The fossil record indicates that this evolutionary transition took less than 15 million years, and that different organ systems followed different evolutionary trajectories. Here we document the evolutionary changes that took place in the sound transmission mechanism of the outer and middle ear in early whales. Sound transmission mechanisms change early on in whale evolution and pass through a stage (in pakicetids) in which hearing in both air and water is unsophisticated. This intermediate stage is soon abandoned and is replaced (in remingtonocetids and protocetids) by a sound transmission mechanism similar to that in modern toothed whales. The mechanism of these fossil whales lacks sophistication, and still retains some of the key elements that land mammals use to hear airborne sound. |
format |
Article in Journal/Newspaper |
author |
Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor |
spellingShingle |
Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor Eocene evolution of whale hearing |
author_facet |
Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor |
author_sort |
Nummela, Sirpa |
title |
Eocene evolution of whale hearing |
title_short |
Eocene evolution of whale hearing |
title_full |
Eocene evolution of whale hearing |
title_fullStr |
Eocene evolution of whale hearing |
title_full_unstemmed |
Eocene evolution of whale hearing |
title_sort |
eocene evolution of whale hearing |
publisher |
Nature Publishing Group |
publishDate |
2004 |
url |
http://repository.ias.ac.in/4644/ http://repository.ias.ac.in/4644/1/318.pdf http://www.nature.com/nature/journal/v430/n7001/full/nature02720.html |
genre |
toothed whales |
genre_facet |
toothed whales |
op_relation |
http://repository.ias.ac.in/4644/1/318.pdf Nummela, Sirpa Thewissen, J. G. M. Bajpai, Sunil Hussain, S. Taseer Kumar, Kishor (2004) Eocene evolution of whale hearing Nature, 430 (7001). pp. 776-778. ISSN 0028-0836 |
_version_ |
1766218116384161792 |