Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula
Examination of a sample of 94 female crabeater seals collected in November, 1977, indicated that, for the past 7 years, the average age at sexual maturity was 3.8 years. Reproductive performance as evidenced by uterine scars and ovarian corpora is discussed. No females inseminated at age 4 or less s...
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Language: | English |
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1981
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crcansciencepubl:10.1139/z81-015 2023-12-17T10:20:19+01:00 Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula Bengtson, John L. Siniff, Donald B. 1981 http://dx.doi.org/10.1139/z81-015 http://www.nrcresearchpress.com/doi/pdf/10.1139/z81-015 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 59, issue 1, page 92-102 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1981 crcansciencepubl https://doi.org/10.1139/z81-015 2023-11-19T13:39:41Z Examination of a sample of 94 female crabeater seals collected in November, 1977, indicated that, for the past 7 years, the average age at sexual maturity was 3.8 years. Reproductive performance as evidenced by uterine scars and ovarian corpora is discussed. No females inseminated at age 4 or less successfully carried a fetus full term. Timing of ovulation was affected by both age and social category. Younger seals ovulate later in the season than older seals. No females ovulated prior to weaning their pups. Ovulation in experienced females occurred sometimes while still in a mated pair, but mostly at or after dissolution of the pair bond. Comparison of recent age of sexual maturity with earlier reports shows an increase in this age since 1967. This trend may reflect geographical differences or changes in the Antarctic marine ecosystem following a slowdown in Antarctic whaling. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Crabeater Seals Lobodon carcinophagus Canadian Science Publishing (via Crossref) Antarctic The Antarctic Antarctic Peninsula Canadian Journal of Zoology 59 1 92 102 |
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 Bengtson, John L. Siniff, Donald B. Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Examination of a sample of 94 female crabeater seals collected in November, 1977, indicated that, for the past 7 years, the average age at sexual maturity was 3.8 years. Reproductive performance as evidenced by uterine scars and ovarian corpora is discussed. No females inseminated at age 4 or less successfully carried a fetus full term. Timing of ovulation was affected by both age and social category. Younger seals ovulate later in the season than older seals. No females ovulated prior to weaning their pups. Ovulation in experienced females occurred sometimes while still in a mated pair, but mostly at or after dissolution of the pair bond. Comparison of recent age of sexual maturity with earlier reports shows an increase in this age since 1967. This trend may reflect geographical differences or changes in the Antarctic marine ecosystem following a slowdown in Antarctic whaling. |
format |
Article in Journal/Newspaper |
author |
Bengtson, John L. Siniff, Donald B. |
author_facet |
Bengtson, John L. Siniff, Donald B. |
author_sort |
Bengtson, John L. |
title |
Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
title_short |
Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
title_full |
Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
title_fullStr |
Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
title_full_unstemmed |
Reproductive aspects of female crabeater seals ( Lobodon carcinophagus ) along the Antarctic Peninsula |
title_sort |
reproductive aspects of female crabeater seals ( lobodon carcinophagus ) along the antarctic peninsula |
publisher |
Canadian Science Publishing |
publishDate |
1981 |
url |
http://dx.doi.org/10.1139/z81-015 http://www.nrcresearchpress.com/doi/pdf/10.1139/z81-015 |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula Crabeater Seals Lobodon carcinophagus |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Crabeater Seals Lobodon carcinophagus |
op_source |
Canadian Journal of Zoology volume 59, issue 1, page 92-102 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z81-015 |
container_title |
Canadian Journal of Zoology |
container_volume |
59 |
container_issue |
1 |
container_start_page |
92 |
op_container_end_page |
102 |
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1785590894621097984 |