Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica
We examined 2267 harp seal mandibles to determine the frequency of extra, missing, and malformed teeth; to examine the effect of these anomalies on longevity; and to assess the usefulness of anomalies in identifying stocks of seals. Supernumerary teeth occurred in 1.7% of the seals, 0.5% of the seal...
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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/z87-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-121 |
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crcansciencepubl:10.1139/z87-121 2023-12-17T10:31:18+01:00 Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica Stewart, R. E. A. Stewart, B. E. 1987 http://dx.doi.org/10.1139/z87-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-121 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 3, page 769-771 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-121 2023-11-19T13:38:52Z We examined 2267 harp seal mandibles to determine the frequency of extra, missing, and malformed teeth; to examine the effect of these anomalies on longevity; and to assess the usefulness of anomalies in identifying stocks of seals. Supernumerary teeth occurred in 1.7% of the seals, 0.5% of the seals were missing teeth (none because of trauma), and 0.6% had morphologically deviant teeth. Only 0.2% of the seals had more than one type of anomaly and none had all three. Average age and age–frequency distributions for anomalous and normal seals were not different. Anomalies were probably too rare and combined too much genetic variation to be useful in stock delineation. Article in Journal/Newspaper Harp Seal Northwest Atlantic Phoca groenlandica Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 65 3 769 771 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Stewart, R. E. A. Stewart, B. E. Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We examined 2267 harp seal mandibles to determine the frequency of extra, missing, and malformed teeth; to examine the effect of these anomalies on longevity; and to assess the usefulness of anomalies in identifying stocks of seals. Supernumerary teeth occurred in 1.7% of the seals, 0.5% of the seals were missing teeth (none because of trauma), and 0.6% had morphologically deviant teeth. Only 0.2% of the seals had more than one type of anomaly and none had all three. Average age and age–frequency distributions for anomalous and normal seals were not different. Anomalies were probably too rare and combined too much genetic variation to be useful in stock delineation. |
format |
Article in Journal/Newspaper |
author |
Stewart, R. E. A. Stewart, B. E. |
author_facet |
Stewart, R. E. A. Stewart, B. E. |
author_sort |
Stewart, R. E. A. |
title |
Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
title_short |
Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
title_full |
Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
title_fullStr |
Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
title_full_unstemmed |
Mandibular dental anomalies of Northwest Atlantic harp seals, Phoca groenlandica |
title_sort |
mandibular dental anomalies of northwest atlantic harp seals, phoca groenlandica |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-121 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-121 |
genre |
Harp Seal Northwest Atlantic Phoca groenlandica |
genre_facet |
Harp Seal Northwest Atlantic Phoca groenlandica |
op_source |
Canadian Journal of Zoology volume 65, issue 3, page 769-771 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-121 |
container_title |
Canadian Journal of Zoology |
container_volume |
65 |
container_issue |
3 |
container_start_page |
769 |
op_container_end_page |
771 |
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1785584521345761280 |