Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata
A brief lactation period with rapid neonatal weight gain may be adaptive for seals breeding on unstable pack ice. We studied the duration of lactation and growth of known-age pups of the hooded seal, Cystophora cristata, on the pack ice off Labrador. Mean body weight of pups increased from 22.0 kg a...
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Language: | English |
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Canadian Science Publishing
1985
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Online Access: | http://dx.doi.org/10.1139/z85-424 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-424 |
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crcansciencepubl:10.1139/z85-424 2024-09-15T18:03:27+00:00 Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata Bowen, W. D. Oftedal, O. T. Boness, D. J. 1985 http://dx.doi.org/10.1139/z85-424 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-424 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 63, issue 12, page 2841-2846 ISSN 0008-4301 1480-3283 journal-article 1985 crcansciencepubl https://doi.org/10.1139/z85-424 2024-09-05T04:11:13Z A brief lactation period with rapid neonatal weight gain may be adaptive for seals breeding on unstable pack ice. We studied the duration of lactation and growth of known-age pups of the hooded seal, Cystophora cristata, on the pack ice off Labrador. Mean body weight of pups increased from 22.0 kg at birth (n = 21) to a maximum of 42.6 kg on day 4 (n = 11) and then declined. On the basis of maternal absence, weight change, gastric contents, and clarity of blood serum, we conclude that pups are weaned 4 days after birth (range, 3–5 days). This is the shortest lactation period known for any mammal. Tagged pups captured on sequential days gained on average 7.1 kg per 24 h from the day after birth to weaning. Maternal effort supported a relative rate of weight gain (145 g∙kg maternal weight −0.75 ∙day −1 ) that is 2.5–6 times that of other phocids. By combining a large birth weight with rapid neonatal weight gain, hooded seals achieve a weaning weight comparable to other phocids in one-third to one-tenth the amount of time after birth. Article in Journal/Newspaper Cystophora cristata hooded seal Canadian Science Publishing Canadian Journal of Zoology 63 12 2841 2846 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
A brief lactation period with rapid neonatal weight gain may be adaptive for seals breeding on unstable pack ice. We studied the duration of lactation and growth of known-age pups of the hooded seal, Cystophora cristata, on the pack ice off Labrador. Mean body weight of pups increased from 22.0 kg at birth (n = 21) to a maximum of 42.6 kg on day 4 (n = 11) and then declined. On the basis of maternal absence, weight change, gastric contents, and clarity of blood serum, we conclude that pups are weaned 4 days after birth (range, 3–5 days). This is the shortest lactation period known for any mammal. Tagged pups captured on sequential days gained on average 7.1 kg per 24 h from the day after birth to weaning. Maternal effort supported a relative rate of weight gain (145 g∙kg maternal weight −0.75 ∙day −1 ) that is 2.5–6 times that of other phocids. By combining a large birth weight with rapid neonatal weight gain, hooded seals achieve a weaning weight comparable to other phocids in one-third to one-tenth the amount of time after birth. |
format |
Article in Journal/Newspaper |
author |
Bowen, W. D. Oftedal, O. T. Boness, D. J. |
spellingShingle |
Bowen, W. D. Oftedal, O. T. Boness, D. J. Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
author_facet |
Bowen, W. D. Oftedal, O. T. Boness, D. J. |
author_sort |
Bowen, W. D. |
title |
Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
title_short |
Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
title_full |
Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
title_fullStr |
Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
title_full_unstemmed |
Birth to weaning in 4 days: remarkable growth in the hooded seal, Cystophora cristata |
title_sort |
birth to weaning in 4 days: remarkable growth in the hooded seal, cystophora cristata |
publisher |
Canadian Science Publishing |
publishDate |
1985 |
url |
http://dx.doi.org/10.1139/z85-424 http://www.nrcresearchpress.com/doi/pdf/10.1139/z85-424 |
genre |
Cystophora cristata hooded seal |
genre_facet |
Cystophora cristata hooded seal |
op_source |
Canadian Journal of Zoology volume 63, issue 12, page 2841-2846 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z85-424 |
container_title |
Canadian Journal of Zoology |
container_volume |
63 |
container_issue |
12 |
container_start_page |
2841 |
op_container_end_page |
2846 |
_version_ |
1810440940837404672 |