Endocranial Volume of Mid-Late Eocene Archaeocetes (Order: Cetacea) Revealed by Computed Tomography: Implications for Cetacean Brain Evolution
dc.contributor.author | Marino, Lori | en_US |
dc.contributor.author | Frohlich, Bruno | en_US |
dc.contributor.author | Blane, Caroline E. | en_US |
dc.contributor.author | Aldag, John Matthew | en_US |
dc.contributor.author | Uhen, Mark D. | en_US |
dc.contributor.author | Bohaska, David | en_US |
dc.contributor.author | Whitmore, Frank C. | en_US |
dc.date.accessioned | 2006-09-11T15:30:59Z | |
dc.date.available | 2006-09-11T15:30:59Z | |
dc.date.issued | 2000-06 | en_US |
dc.identifier.citation | Marino, Lori; Uhen, Mark D.; Frohlich, Bruno; Aldag, John Matthew; Blane, Caroline; Bohaska, David; Whitmore, Frank C.; (2000). "Endocranial Volume of Mid-Late Eocene Archaeocetes (Order: Cetacea) Revealed by Computed Tomography: Implications for Cetacean Brain Evolution." Journal of Mammalian Evolution 7(2): 81-94. <http://hdl.handle.net/2027.42/44975> | en_US |
dc.identifier.issn | 1573-7055 | en_US |
dc.identifier.issn | 1064-7554 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/44975 | |
dc.description.abstract | The large brain of modern cetaceans has engendered much hypothesizing about both the intelligence of cetaceans (dolphins, whales, and porpoises) and the factors related to the evolution of such large brains. Despite much interest in cetacean brain evolution, until recently there have been few estimates of brain mass and/or brain–body weight ratios in fossil cetaceans. In the present study, computed tomography (CT) was used to visualize and estimate endocranial volume, as well as to calculate level of encephalization, for two fully aquatic mid-late Eocene archaeocete species, Dorudon atrox and Zygorhiza kochii. The specific objective was to address more accurately and more conclusively the question of whether relative brain size in fully aquatic archaeocetes was greater than that of their hypothesized sister taxon Mesonychia. The findings suggest that there was no increase in encephalization between Mesonychia and these archaeocete species. | en_US |
dc.format.extent | 331183 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media | en_US |
dc.subject.other | Encephalization | en_US |
dc.subject.other | Cetacea | en_US |
dc.subject.other | Human Genetics | en_US |
dc.subject.other | Life Sciences | en_US |
dc.subject.other | Evolutionary Biology | en_US |
dc.subject.other | Archaeocete | en_US |
dc.subject.other | Endocranial Volume | en_US |
dc.subject.other | Computed Tomography | en_US |
dc.title | Endocranial Volume of Mid-Late Eocene Archaeocetes (Order: Cetacea) Revealed by Computed Tomography: Implications for Cetacean Brain Evolution | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Radiology, University of Michigan, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationother | Department of Paleobiology, Smithsonian Institution, Washington, D.C | en_US |
dc.contributor.affiliationother | U.S. Geological Survey and Department of Paleobiology, Smithsonian Institution, Washington, D.C | en_US |
dc.contributor.affiliationother | Neuroscience and Behavioral Biology Program, Psychology Building, Emory University, Atlanta, Georgia, 30322 | en_US |
dc.contributor.affiliationother | Department of Paleontology and Zoology, Cranbrook Institute of Science, Bloomfield Hills, Michigan | en_US |
dc.contributor.affiliationother | Department of Anthropology, Smithsonian Institution, Washington, D.C | en_US |
dc.contributor.affiliationother | Neuroscience and Behavioral Biology Program, Psychology Building, Emory University, Atlanta, Georgia, 30322 | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/44975/1/10914_2004_Article_223701.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1023/A:1009417831601 | en_US |
dc.identifier.source | Journal of Mammalian Evolution | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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