Dental ontogeny of harp seals, Phoca groenlandica
Harp seal fetuses and neonates were examined to determine the development, resorption, and eruption characteristics of deciduous and permanent dentition. Early September fetuses had recently formed, deciduous teeth only. By early December the deciduous dentition was robust and enameled. Permanent te...
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Language: | English |
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/z87-225 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-225 |
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crcansciencepubl:10.1139/z87-225 2024-05-19T07:41:39+00:00 Dental ontogeny of harp seals, Phoca groenlandica Stewart, R. E. A. Stewart, B. E. 1987 http://dx.doi.org/10.1139/z87-225 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-225 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 6, page 1425-1434 ISSN 0008-4301 1480-3283 journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-225 2024-04-25T06:52:00Z Harp seal fetuses and neonates were examined to determine the development, resorption, and eruption characteristics of deciduous and permanent dentition. Early September fetuses had recently formed, deciduous teeth only. By early December the deciduous dentition was robust and enameled. Permanent teeth were also present. In late December the roots of the deciduous teeth were being resorbed and the permanent dentition was larger and better developed. About 80% of the deciduous teeth were resorbed by birth in March. The rest were resorbed or shed after birth. The pattern of permanent tooth eruption was not correlated with pup age but the total number of teeth erupted increased significantly with increasing pup age, from 38% in newborns to 100% in weaned pups about 3 weeks old. The neonatal line formed at birth rather than at weaning or the onset of moult. Article in Journal/Newspaper Harp Seal Phoca groenlandica Canadian Science Publishing Canadian Journal of Zoology 65 6 1425 1434 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Harp seal fetuses and neonates were examined to determine the development, resorption, and eruption characteristics of deciduous and permanent dentition. Early September fetuses had recently formed, deciduous teeth only. By early December the deciduous dentition was robust and enameled. Permanent teeth were also present. In late December the roots of the deciduous teeth were being resorbed and the permanent dentition was larger and better developed. About 80% of the deciduous teeth were resorbed by birth in March. The rest were resorbed or shed after birth. The pattern of permanent tooth eruption was not correlated with pup age but the total number of teeth erupted increased significantly with increasing pup age, from 38% in newborns to 100% in weaned pups about 3 weeks old. The neonatal line formed at birth rather than at weaning or the onset of moult. |
format |
Article in Journal/Newspaper |
author |
Stewart, R. E. A. Stewart, B. E. |
spellingShingle |
Stewart, R. E. A. Stewart, B. E. Dental ontogeny of harp seals, Phoca groenlandica |
author_facet |
Stewart, R. E. A. Stewart, B. E. |
author_sort |
Stewart, R. E. A. |
title |
Dental ontogeny of harp seals, Phoca groenlandica |
title_short |
Dental ontogeny of harp seals, Phoca groenlandica |
title_full |
Dental ontogeny of harp seals, Phoca groenlandica |
title_fullStr |
Dental ontogeny of harp seals, Phoca groenlandica |
title_full_unstemmed |
Dental ontogeny of harp seals, Phoca groenlandica |
title_sort |
dental ontogeny of harp seals, phoca groenlandica |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-225 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-225 |
genre |
Harp Seal Phoca groenlandica |
genre_facet |
Harp Seal Phoca groenlandica |
op_source |
Canadian Journal of Zoology volume 65, issue 6, page 1425-1434 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-225 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
6 |
container_start_page |
1425 |
op_container_end_page |
1434 |
_version_ |
1799481262620016640 |