Preweaning mortality of Weddell seal pups
We examined mortality prior to weaning of Weddell seal pups (Leptonychotes weddellii), using resighting data collected from 1984 to 1993 on the annual ice of McMurdo Sound, Antarctica. Mortality rates were estimated using counts of dead pups found on the surface and mark–recapture techniques. The st...
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1996
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crcansciencepubl:10.1139/z96-195 2023-12-17T10:21:29+01:00 Preweaning mortality of Weddell seal pups Schreer, Jason F. Hastings, Kelly K. Testa, J. Ward 1996 http://dx.doi.org/10.1139/z96-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-195 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 74, issue 9, page 1775-1778 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1996 crcansciencepubl https://doi.org/10.1139/z96-195 2023-11-19T13:39:38Z We examined mortality prior to weaning of Weddell seal pups (Leptonychotes weddellii), using resighting data collected from 1984 to 1993 on the annual ice of McMurdo Sound, Antarctica. Mortality rates were estimated using counts of dead pups found on the surface and mark–recapture techniques. The standard Jolly–Seber model for open populations fit the recapture data best and corresponded well to the known biology of these animals. Yearly mortality rates estimated by mark–recapture techniques ranged from 6 to 22%, with a mean across years of 13%. These values are twice as high as those previously reported for Weddell seals and those calculated from counts of dead pups in this study. This suggests that there is significant unseen mortality due either to undiscovered fatalities on the ice surface or to significant mortality occurring in the water. Article in Journal/Newspaper Antarc* Antarctica McMurdo Sound Weddell Seal Weddell Seals Canadian Science Publishing (via Crossref) McMurdo Sound Weddell Canadian Journal of Zoology 74 9 1775 1778 |
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 Schreer, Jason F. Hastings, Kelly K. Testa, J. Ward Preweaning mortality of Weddell seal pups |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We examined mortality prior to weaning of Weddell seal pups (Leptonychotes weddellii), using resighting data collected from 1984 to 1993 on the annual ice of McMurdo Sound, Antarctica. Mortality rates were estimated using counts of dead pups found on the surface and mark–recapture techniques. The standard Jolly–Seber model for open populations fit the recapture data best and corresponded well to the known biology of these animals. Yearly mortality rates estimated by mark–recapture techniques ranged from 6 to 22%, with a mean across years of 13%. These values are twice as high as those previously reported for Weddell seals and those calculated from counts of dead pups in this study. This suggests that there is significant unseen mortality due either to undiscovered fatalities on the ice surface or to significant mortality occurring in the water. |
format |
Article in Journal/Newspaper |
author |
Schreer, Jason F. Hastings, Kelly K. Testa, J. Ward |
author_facet |
Schreer, Jason F. Hastings, Kelly K. Testa, J. Ward |
author_sort |
Schreer, Jason F. |
title |
Preweaning mortality of Weddell seal pups |
title_short |
Preweaning mortality of Weddell seal pups |
title_full |
Preweaning mortality of Weddell seal pups |
title_fullStr |
Preweaning mortality of Weddell seal pups |
title_full_unstemmed |
Preweaning mortality of Weddell seal pups |
title_sort |
preweaning mortality of weddell seal pups |
publisher |
Canadian Science Publishing |
publishDate |
1996 |
url |
http://dx.doi.org/10.1139/z96-195 http://www.nrcresearchpress.com/doi/pdf/10.1139/z96-195 |
geographic |
McMurdo Sound Weddell |
geographic_facet |
McMurdo Sound Weddell |
genre |
Antarc* Antarctica McMurdo Sound Weddell Seal Weddell Seals |
genre_facet |
Antarc* Antarctica McMurdo Sound Weddell Seal Weddell Seals |
op_source |
Canadian Journal of Zoology volume 74, issue 9, page 1775-1778 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z96-195 |
container_title |
Canadian Journal of Zoology |
container_volume |
74 |
container_issue |
9 |
container_start_page |
1775 |
op_container_end_page |
1778 |
_version_ |
1785535138720907264 |