1
40
2
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Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1038/nature02720" target="_blank" rel="noreferrer noopener">http://doi.org/10.1038/nature02720</a>
Pages
776–778
Issue
7001
Volume
430
Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
A name given to the resource
Eocene evolution of whale hearing.
Publisher
An entity responsible for making the resource available
Nature
Date
A point or period of time associated with an event in the lifecycle of the resource
2004
2004-08
Subject
The topic of the resource
*Biological Evolution; *Fossils; Air; Animals; Ear/*anatomy & histology/*physiology; EVOLUTION (Biology); FOSSILS; HEARING; Hearing/*physiology; MAMMALS; Mammals/anatomy & histology/physiology; Phylogeny; SOUND; Water; WHALES; Whales/*anatomy & histology/*physiology
Creator
An entity primarily responsible for making the resource
Nummela Sirpa; Thewissen J G M; Bajpai Sunil; Hussain S Taseer; Kumar Kishor
Description
An account of the resource
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.
Identifier
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<a href="http://doi.org/10.1038/nature02720" target="_blank" rel="noreferrer noopener">10.1038/nature02720</a>
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Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Biological Evolution
*Fossils
2004
Air
Animals
Bajpai Sunil
Department of Anatomy & Neurobiology
Ear/*anatomy & histology/*physiology
EVOLUTION (Biology)
Fossils
Hearing
Hearing/*physiology
Hussain S Taseer
Kumar Kishor
Mammals
Mammals/anatomy & histology/physiology
Nature
NEOMED College of Medicine
Nummela Sirpa
Phylogeny
Sound
Thewissen J G M
Water
WHALES
Whales/*anatomy & histology/*physiology
-
Text
A resource consisting primarily of words for reading. Examples include books, letters, dissertations, poems, newspapers, articles, archives of mailing lists. Note that facsimiles or images of texts are still of the genre Text.
URL Address
<a href="http://doi.org/10.1121/1.2372712" target="_blank" rel="noreferrer noopener">http://doi.org/10.1121/1.2372712</a>
Rights
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
Pages
3463-3466
Issue
6
Volume
120
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Dublin Core
The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/.
Title
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High-frequency Hearing In Phocid And Otariid Pinnipeds: An Interpretation Based On Inertial And Cochlear Constraints (l)
Publisher
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Journal of the Acoustical Society of America
Date
A point or period of time associated with an event in the lifecycle of the resource
2006
2006-12
Subject
The topic of the resource
Acoustics; air; Audiology & Speech-Language Pathology; harp seal; middle-ear; pagophilus-groenlandicus erxleben; sensitivity; underwater audiogram
Creator
An entity primarily responsible for making the resource
Hemila S; Nummela S; Berta A; Reuter T
Description
An account of the resource
Audiograms in air and underwater, determined by previous workers for four pinniped species, two eared seals '(Otariidae) and two phocids (Phocidae), are supplemented here by measurements on their middle ear ossicular mass, enabling mechanistic interpretations of high-frequency hearing and audiogram differences. Otariid hearing is not largely affected by the medium (air/water). This indicates that cochlear constraints limit high-frequency hearing in otariids. Phocids, however, have massive middle ear ossicles, and underwater hearing has radically shifted towards higher frequencies. This suggests that the high-frequency hearing of phocids in air is constrained by ossicle inertia. (c) 2006 Acoustical Society of America.
Identifier
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<a href="http://doi.org/10.1121/1.2372712" target="_blank" rel="noreferrer noopener">10.1121/1.2372712</a>
Format
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Journal Article or Conference Abstract Publication
2006
Acoustics
Air
Audiology & Speech-Language Pathology
Berta A
harp seal
Hemila S
Journal Article or Conference Abstract Publication
Journal of the Acoustical Society of America
middle-ear
Nummela S
pagophilus-groenlandicus erxleben
Reuter T
sensitivity
underwater audiogram