1
40
4
-
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/10.1093/icb/icw119" target="_blank" rel="noreferrer noopener">http://doi.org/10.1093/icb/icw119</a>
Pages
1370–1384
Issue
6
Volume
56
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
Aquatic Habits of Cetacean Ancestors: Integrating Bone Microanatomy and Stable Isotopes.
Publisher
An entity responsible for making the resource available
Integrative and comparative biology
Date
A point or period of time associated with an event in the lifecycle of the resource
2016
2016-12
Subject
The topic of the resource
*Ecosystem; Animals; Bone and Bones/anatomy & histology/metabolism; Cetacea/*physiology; Isotope Labeling; Isotopes/metabolism
Creator
An entity primarily responsible for making the resource
Cooper Lisa Noelle; Clementz Mark T; Usip Sharon; Bajpai Sunil; Hussain S Taseer; Hieronymus Tobin L
Description
An account of the resource
The earliest cetaceans were interpreted as semi-aquatic based on the presence of thickened bones and stable oxygen isotopes in tooth enamel. However, the origin of aquatic behaviors in cetacean relatives (e.g., raoellids, anthracotheres) remains unclear. This study reconstructs the origins of aquatic behaviors based on long bone microanatomy and stable oxygen isotopes of tooth enamel in modern and extinct cetartiodactylans. Our findings are congruent with published accounts that microanatomy can be a reliable indicator of aquatic behaviors in taxa that are obligatorily aquatic, and also highlight that some "semi-aquatic" behaviors (fleeing into the water to escape predation) may have a stronger relationship to bone microanatomy than others (herbivory in near-shore aquatic settings). Bone microanatomy is best considered with other lines of information in the land-to-sea transition of cetaceans, such as stable isotopes. This study extends our understanding of the progression of skeletal phenotypes associated with habitat shifts in the relatives of cetaceans.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1093/icb/icw119" target="_blank" rel="noreferrer noopener">10.1093/icb/icw119</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Ecosystem
2016
Animals
Bajpai Sunil
Bone and Bones/anatomy & histology/metabolism
Cetacea/*physiology
Clementz Mark T
Cooper Lisa Noelle
Department of Anatomy & Neurobiology
Hieronymus Tobin L
Hussain S Taseer
Integrative and comparative biology
Isotope Labeling
Isotopes/metabolism
NEOMED College of Medicine
Usip Sharon
-
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/10.1086/676309" target="_blank" rel="noreferrer noopener">http://doi.org/10.1086/676309</a>
Pages
576–584
Issue
4
Volume
87
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
Unique biochemical and mineral composition of whale ear bones.
Publisher
An entity responsible for making the resource available
Physiological and biochemical zoology : PBZ
Date
A point or period of time associated with an event in the lifecycle of the resource
2014
2014-08
Subject
The topic of the resource
Amino Acids; Animals; Apatites; Artiodactyla/*anatomy & histology/*physiology; Bone and Bones/*chemistry; Ear/*anatomy & histology/*physiology; Minerals; Phylogeny; Trichechus/*anatomy & histology/*physiology; Whales/*anatomy & histology/*physiology
Creator
An entity primarily responsible for making the resource
Kim Sora L; Thewissen J G M; Churchill Morgan M; Suydam Robert S; Ketten Darlene R; Clementz Mark T
Description
An account of the resource
Abstract Cetaceans are obligate aquatic mammals derived from terrestrial artiodactyls. The defining characteristic of cetaceans is a thick and dense lip (pachyosteosclerotic involucrum) of an ear bone (the tympanic). This unique feature is absent in modern terrestrial artiodactyls and is suggested to be important in underwater hearing. Here, we investigate the mineralogical and biochemical properties of the involucrum, as these may hold clues to the aquatic adaptations of cetaceans. We compared bioapatites (enamel, dentine, cementum, and skeletal bone) of cetaceans with those of terrestrial artiodactyls and pachyosteosclerotic ribs of manatees (Sirenia). We investigated organic, carbonate, and mineral composition as well as crystal size and crystallinity index. In all studied variables, bioapatites of the cetacean involucrum were intermediate in composition and structure between those of tooth enamel on the one hand and those of dentine, cementum, and skeletal bone on the other. We also studied the amino acid composition of the cetacean involucrum relative to that of other skeletal bone. The central involucrum had low glycine and hydroxyproline concentrations but high concentrations of nonessential amino acids, unlike most bone samples but similar to the tympanic of hippos and the (pachyosteosclerotic) ribs of manatees. These amino acid results are evidence of rapid bone development. We hypothesize that the mineralogical and amino acid composition of cetacean bullae differs from that of other bone because of (1) functional modifications for underwater sound reception and (2) structural adaptations related to rapid ossification.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1086/676309" target="_blank" rel="noreferrer noopener">10.1086/676309</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2014
Amino Acids
Animals
Apatites
Artiodactyla/*anatomy & histology/*physiology
Bone and Bones/*chemistry
Churchill Morgan M
Clementz Mark T
Department of Anatomy & Neurobiology
Ear/*anatomy & histology/*physiology
Ketten Darlene R
Kim Sora L
Minerals
NEOMED College of Medicine
Phylogeny
Physiological and biochemical zoology : PBZ
Suydam Robert S
Thewissen J G M
Trichechus/*anatomy & histology/*physiology
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/10.1038/nature06343" target="_blank" rel="noreferrer noopener">http://doi.org/10.1038/nature06343</a>
Pages
1190–1194
Issue
7173
Volume
450
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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Whales originated from aquatic artiodactyls in the Eocene epoch of India.
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
2007
2007-12
Subject
The topic of the resource
*Phylogeny; *Whales/anatomy & histology/classification/physiology; Animals; ARTIODACTYLA; BICUSPIDS; CETACEA; EOCENE stratigraphic geology; India; INDIA; MAMMALOGICAL research; Pakistan; Time Factors; UNGULATES; WHALES
Creator
An entity primarily responsible for making the resource
Thewissen J G M; Cooper Lisa Noelle; Clementz Mark T; Bajpai Sunil; Tiwari B N
Description
An account of the resource
Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of cetaceans has been missing. It was known that whales are related to even-toed ungulates (artiodactyls), but until now no artiodactyls were morphologically close to early whales. Here we show that the Eocene south Asian raoellid artiodactyls are the sister group to whales. The raoellid Indohyus is similar to whales, and unlike other artiodactyls, in the structure of its ears and premolars, in the density of its limb bones and in the stable-oxygen-isotope composition of its teeth. We also show that a major dietary change occurred during the transition from artiodactyls to whales and that raoellids were aquatic waders. This indicates that aquatic life in this lineage occurred before the origin of the order Cetacea.
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1038/nature06343" target="_blank" rel="noreferrer noopener">10.1038/nature06343</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
*Phylogeny
*Whales/anatomy & histology/classification/physiology
2007
Animals
Artiodactyla
Bajpai Sunil
BICUSPIDS
Cetacea
Clementz Mark T
Cooper Lisa Noelle
Department of Anatomy & Neurobiology
EOCENE stratigraphic geology
India
MAMMALOGICAL research
Nature
NEOMED College of Medicine
Pakistan
Thewissen J G M
Time Factors
Tiwari B N
UNGULATES
WHALES
-
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/nature07775" target="_blank" rel="noreferrer noopener">http://doi.org/10.1038/nature07775</a>
Pages
E5–E5
Issue
7236
Volume
458
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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Thewissen et al. reply.
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
2009
2009-03-19
Subject
The topic of the resource
LETTERS to the editor; WHALES
Creator
An entity primarily responsible for making the resource
Thewissen J G M; Cooper Lisa Noelle; Clementz Mark T; Bajpai Sunil; Tiwari B N
Description
An account of the resource
Replying to: J. H. Geisler & J. M. Theodor 458, 10.1038/nature07776 (2009)The analysis of Geisler and Theodor confirms our main phylogenetic result, that raoellids are, or include, the sister group to cetaceans. Their study expands on our findings by inferring that hippopotamids are the sister group to the combined raoellid–cetacean clade, whereas our paper had explicitly stated that our data could not address the position of the extant artiodactyl families. [ABSTRACT FROM AUTHOR]
Identifier
An unambiguous reference to the resource within a given context
<a href="http://doi.org/10.1038/nature07775" target="_blank" rel="noreferrer noopener">10.1038/nature07775</a>
Rights
Information about rights held in and over the resource
Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).
2009
Bajpai Sunil
Clementz Mark T
Cooper Lisa Noelle
Department of Anatomy & Neurobiology
LETTERS to the editor
Nature
NEOMED College of Medicine
Thewissen J G M
Tiwari B N
WHALES