Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata
We studied the components of mass transfer from mother to pup during the lactation period and weight loss by fasting pups postweaning in the hooded seal, Cystophora cristata. Measurements were taken from 33 mother–pup pairs and 69 weaned pups. Mean body weight of mothers declined from an average of...
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Canadian Science Publishing
1987
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Online Access: | http://dx.doi.org/10.1139/z87-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-001 |
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crcansciencepubl:10.1139/z87-001 2024-04-28T08:16:51+00:00 Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata Bowen, W. D. Boness, D. J. Oftedal, O. T. 1987 http://dx.doi.org/10.1139/z87-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-001 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 65, issue 1, page 1-8 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1987 crcansciencepubl https://doi.org/10.1139/z87-001 2024-04-02T06:55:54Z We studied the components of mass transfer from mother to pup during the lactation period and weight loss by fasting pups postweaning in the hooded seal, Cystophora cristata. Measurements were taken from 33 mother–pup pairs and 69 weaned pups. Mean body weight of mothers declined from an average of 179 kg at the beginning of lactation to 150 kg for mothers nursing fat pups near the end of lactation. Over 80% of this weight loss was from the sculp (i.e., skin and blubber). Pup weight doubled during the 4 days of lactation, with about 70% of this weight gain in the form of blubber. Fasting pups lost 29% or 13 kg of their body weight between weaning and mid to late April when feeding begins. Sculp and core weight accounted for 51% and 49%, respectively, of total weight loss during this fasting period. Hooded seal mothers invest a smaller portion of their stored fat (33%) in their pup than do grey seals (85%) and northern elephant seals (58%). Our hooded seal data are consistent with the hypothesis that the abbreviation of lactation allows a reduction in overhead costs and more efficient transfer of nutrients from mother to pup. Article in Journal/Newspaper Cystophora cristata Elephant Seals hooded seal Canadian Science Publishing Canadian Journal of Zoology 65 1 1 8 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
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Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Bowen, W. D. Boness, D. J. Oftedal, O. T. Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We studied the components of mass transfer from mother to pup during the lactation period and weight loss by fasting pups postweaning in the hooded seal, Cystophora cristata. Measurements were taken from 33 mother–pup pairs and 69 weaned pups. Mean body weight of mothers declined from an average of 179 kg at the beginning of lactation to 150 kg for mothers nursing fat pups near the end of lactation. Over 80% of this weight loss was from the sculp (i.e., skin and blubber). Pup weight doubled during the 4 days of lactation, with about 70% of this weight gain in the form of blubber. Fasting pups lost 29% or 13 kg of their body weight between weaning and mid to late April when feeding begins. Sculp and core weight accounted for 51% and 49%, respectively, of total weight loss during this fasting period. Hooded seal mothers invest a smaller portion of their stored fat (33%) in their pup than do grey seals (85%) and northern elephant seals (58%). Our hooded seal data are consistent with the hypothesis that the abbreviation of lactation allows a reduction in overhead costs and more efficient transfer of nutrients from mother to pup. |
format |
Article in Journal/Newspaper |
author |
Bowen, W. D. Boness, D. J. Oftedal, O. T. |
author_facet |
Bowen, W. D. Boness, D. J. Oftedal, O. T. |
author_sort |
Bowen, W. D. |
title |
Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
title_short |
Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
title_full |
Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
title_fullStr |
Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
title_full_unstemmed |
Mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, Cystophora cristata |
title_sort |
mass transfer from mother to pup and subsequent mass loss by the weaned pup in the hooded seal, cystophora cristata |
publisher |
Canadian Science Publishing |
publishDate |
1987 |
url |
http://dx.doi.org/10.1139/z87-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/z87-001 |
genre |
Cystophora cristata Elephant Seals hooded seal |
genre_facet |
Cystophora cristata Elephant Seals hooded seal |
op_source |
Canadian Journal of Zoology volume 65, issue 1, page 1-8 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z87-001 |
container_title |
Canadian Journal of Zoology |
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65 |
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1 |
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1 |
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8 |
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1797581782182264832 |