Lactation in the Ringed Seal ( Phoca hispida)
Length of lactation, pup growth rate, and female weight loss in ringed seals (Phoca hispida) were estimated using cross-sectional data from the Canadian and Norwegian Arctic. At birth the pups had a standard length of 63.4 cm (SE = 1.3, N = 11) and weighed 5.4 kg (SE = 0.4, N = 6). Weaning occurred...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Canadian Science Publishing
1991
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Online Access: | http://dx.doi.org/10.1139/f91-288 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-288 |
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crcansciencepubl:10.1139/f91-288 2024-06-23T07:50:25+00:00 Lactation in the Ringed Seal ( Phoca hispida) Hammill, M. O. Lydersen, C. Ryg, M. Smith, T. G. 1991 http://dx.doi.org/10.1139/f91-288 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-288 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 12, page 2471-2476 ISSN 0706-652X 1205-7533 journal-article 1991 crcansciencepubl https://doi.org/10.1139/f91-288 2024-06-06T04:11:17Z Length of lactation, pup growth rate, and female weight loss in ringed seals (Phoca hispida) were estimated using cross-sectional data from the Canadian and Norwegian Arctic. At birth the pups had a standard length of 63.4 cm (SE = 1.3, N = 11) and weighed 5.4 kg (SE = 0.4, N = 6). Weaning occurred approximately 39 d (range 36–41 d) after birth at an estimated length of 88.4 cm (SE = 0.65, N = 96) and an estimated weight of 22.1 kg, resulting in an increase in length of 0.64 cm∙d −1 and a weight change of 0.43 kg∙d −1 . Regression of female weight on the number of days after the nominal date of birth for each region indicated that the postpartum female weighed 81.2 kg and lost 0.64 kg∙d −1 (95% CI = ±0.20). During lactation, female weight declined by an estimated 32%, with much of the loss occurring from the blubber. Analyses of stomachs indicated that ringed seals supplemented stored energy reserves by feeding during lactation. Article in Journal/Newspaper Arctic Phoca hispida ringed seal Canadian Science Publishing Arctic Canadian Journal of Fisheries and Aquatic Sciences 48 12 2471 2476 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Length of lactation, pup growth rate, and female weight loss in ringed seals (Phoca hispida) were estimated using cross-sectional data from the Canadian and Norwegian Arctic. At birth the pups had a standard length of 63.4 cm (SE = 1.3, N = 11) and weighed 5.4 kg (SE = 0.4, N = 6). Weaning occurred approximately 39 d (range 36–41 d) after birth at an estimated length of 88.4 cm (SE = 0.65, N = 96) and an estimated weight of 22.1 kg, resulting in an increase in length of 0.64 cm∙d −1 and a weight change of 0.43 kg∙d −1 . Regression of female weight on the number of days after the nominal date of birth for each region indicated that the postpartum female weighed 81.2 kg and lost 0.64 kg∙d −1 (95% CI = ±0.20). During lactation, female weight declined by an estimated 32%, with much of the loss occurring from the blubber. Analyses of stomachs indicated that ringed seals supplemented stored energy reserves by feeding during lactation. |
format |
Article in Journal/Newspaper |
author |
Hammill, M. O. Lydersen, C. Ryg, M. Smith, T. G. |
spellingShingle |
Hammill, M. O. Lydersen, C. Ryg, M. Smith, T. G. Lactation in the Ringed Seal ( Phoca hispida) |
author_facet |
Hammill, M. O. Lydersen, C. Ryg, M. Smith, T. G. |
author_sort |
Hammill, M. O. |
title |
Lactation in the Ringed Seal ( Phoca hispida) |
title_short |
Lactation in the Ringed Seal ( Phoca hispida) |
title_full |
Lactation in the Ringed Seal ( Phoca hispida) |
title_fullStr |
Lactation in the Ringed Seal ( Phoca hispida) |
title_full_unstemmed |
Lactation in the Ringed Seal ( Phoca hispida) |
title_sort |
lactation in the ringed seal ( phoca hispida) |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/f91-288 http://www.nrcresearchpress.com/doi/pdf/10.1139/f91-288 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Phoca hispida ringed seal |
genre_facet |
Arctic Phoca hispida ringed seal |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 48, issue 12, page 2471-2476 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f91-288 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
48 |
container_issue |
12 |
container_start_page |
2471 |
op_container_end_page |
2476 |
_version_ |
1802641315247161344 |