Individuals of Tapirus polkensis from the Gray Fossil Site exhibit an excellent level of preservation. Intact skulls collected from the site were arranged in a rough age class system separated into 7 categories based on the teeth present and amount of dental wear. Such an eruption series is useful for general comparisons amongst the individual tapirs; however, the classes do not represent an age in years due to a lack of data on living tapirs. Consequently, it is possible that some age classes may contain several years of a tapirs life, or comparatively only a few months. In this study I placed ages on individuals of T. polkensis from the Gray Fossil Site based on age data taken from The Baird's Tapir Project of Costa Rica (Baird's Tapirs, T. bairdii) ranging from several months to 7 years in age. As eruption data is only useful for aging tapirs up to 7 years, this study also took dental wear into account for adult tapirs. After aging all possible individuals in the sample, the sample was compared to other studies on perissodactyl population structure. Interestingly, the T. polkensis sample is remarkably similar to modern populations of Diceros bicornis.
","abstract_html":"<p>Individuals of <em>Tapirus polkensis</em> from the Gray Fossil Site exhibit an excellent level of preservation. Intact skulls collected from the site were arranged in a rough age class system separated into 7 categories based on the teeth present and amount of dental wear. Such an eruption series is useful for general comparisons amongst the individual tapirs; however, the classes do not represent an age in years due to a lack of data on living tapirs. Consequently, it is possible that some age classes may contain several years of a tapirs life, or comparatively only a few months. In this study I placed ages on individuals of <em>T. polkensis</em> from the Gray Fossil Site based on age data taken from The Baird's Tapir Project of Costa Rica (Baird's Tapirs, <em>T. bairdii</em>) ranging from several months to 7 years in age. As eruption data is only useful for aging tapirs up to 7 years, this study also took dental wear into account for adult tapirs. After aging all possible individuals in the sample, the sample was compared to other studies on perissodactyl population structure. Interestingly, the <em>T. polkensis</em> sample is remarkably similar to modern populations of <em>Diceros bicornis</em>.</p>","abstract_has_math":false,"creators":["Gibson, Matthew L"],"institution":null,"degree_name":"MS (Master of Science)","degree_level":"Thesis - unrestricted","degree_discipline":"Biology","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-01T07:00:00Z","date_published":"2011-05-01T07:00:00Z","updated_at":"2026-07-24T02:20:06Z","subjects":["tapirs","population","gray fossil site","buccal teeth","age","Earth Sciences","Paleobiology","Paleontology","Physical Sciences and Mathematics"],"languages":[],"rights":["Copyright by the authors."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://dc.etsu.edu/etd/1267","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Gibson, Matthew L"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["1990-01-01T08:00:00Z"]},{"key":"dc:date.issued","label":"Date","values":["2011-05-01T07:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Biology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis - unrestricted"]},{"key":"thesis:degree_name","label":"Degree Name","values":["MS (Master of Science)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["tapirs","population","gray fossil site","buccal teeth","age","Earth Sciences","Paleobiology","Paleontology","Physical Sciences and Mathematics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["Copyright by the authors."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://dc.etsu.edu/context/etd/article/2458/viewcontent/GibsonM042511f.pdf","https://dc.etsu.edu/etd/1267"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Individuals of Tapirus polkensis from the Gray Fossil Site exhibit an excellent level of preservation. Intact skulls collected from the site were arranged in a rough age class system separated into 7 categories based on the teeth present and amount of dental wear. Such an eruption series is useful for general comparisons amongst the individual tapirs; however, the classes do not represent an age in years due to a lack of data on living tapirs. Consequently, it is possible that some age classes may contain several years of a tapirs life, or comparatively only a few months. In this study I placed ages on individuals of T. polkensis from the Gray Fossil Site based on age data taken from The Baird's Tapir Project of Costa Rica (Baird's Tapirs, T. bairdii) ranging from several months to 7 years in age. As eruption data is only useful for aging tapirs up to 7 years, this study also took dental wear into account for adult tapirs. After aging all possible individuals in the sample, the sample was compared to other studies on perissodactyl population structure. Interestingly, the T. polkensis sample is remarkably similar to modern populations of Diceros bicornis.
"]},{"key":"dc:title","label":"Title","values":["Population Structure Based on Age-Class Distribution of Tapirus polkensis from the Gray Fossil Site Tennessee."]}]}],"canonical_facts":{"dc:creator":["Gibson, Matthew L"],"dc:date.available":["1990-01-01T08:00:00Z"],"dc:date.issued":["2011-05-01T07:00:00Z"],"dc:description.abstract":["Individuals of Tapirus polkensis from the Gray Fossil Site exhibit an excellent level of preservation. Intact skulls collected from the site were arranged in a rough age class system separated into 7 categories based on the teeth present and amount of dental wear. Such an eruption series is useful for general comparisons amongst the individual tapirs; however, the classes do not represent an age in years due to a lack of data on living tapirs. Consequently, it is possible that some age classes may contain several years of a tapirs life, or comparatively only a few months. In this study I placed ages on individuals of T. polkensis from the Gray Fossil Site based on age data taken from The Baird's Tapir Project of Costa Rica (Baird's Tapirs, T. bairdii) ranging from several months to 7 years in age. As eruption data is only useful for aging tapirs up to 7 years, this study also took dental wear into account for adult tapirs. After aging all possible individuals in the sample, the sample was compared to other studies on perissodactyl population structure. Interestingly, the T. polkensis sample is remarkably similar to modern populations of Diceros bicornis.
"],"dc:identifier":["https://dc.etsu.edu/context/etd/article/2458/viewcontent/GibsonM042511f.pdf","https://dc.etsu.edu/etd/1267"],"dc:rights":["Copyright by the authors."],"dc:subject":["tapirs","population","gray fossil site","buccal teeth","age","Earth Sciences","Paleobiology","Paleontology","Physical Sciences and Mathematics"],"dc:title":["Population Structure Based on Age-Class Distribution of Tapirus polkensis from the Gray Fossil Site Tennessee."],"thesis:degree_discipline":["Biology"],"thesis:degree_level":["Thesis - unrestricted"],"thesis:degree_name":["MS (Master of Science)"]},"updated_at":"2026-07-24T02:20:06Z"}