Individual variation in milk composition over lactation in harbour seals (Phoca vitulina) and the potential consequences of intermittent attendance S.L.C. Lang, S.J. Iverson, and W.D. Bowen Abstract: We studied milk composition over the course of lactation in 21 harbour seal (Phoca vitulina L., 1758...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.655.6630 2023-05-15T16:33:38+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.655.6630 http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.655.6630 http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf text ftciteseerx 2016-01-08T16:35:55Z Individual variation in milk composition over lactation in harbour seals (Phoca vitulina) and the potential consequences of intermittent attendance S.L.C. Lang, S.J. Iverson, and W.D. Bowen Abstract: We studied milk composition over the course of lactation in 21 harbour seal (Phoca vitulina L., 1758) females on Sable Island, Nova Scotia. Milk fat content increased significantly from 40.8 % ± 1.01 % at parturition to 50.2 % ± 1.39 % at day 7 and then remained relatively constant throughout the remainder of lactation. Changes in dry matter mirrored changes in fat content. Protein content averaged about 9 % over mid to late lactation. There was con-siderable between-individual variation in the composition of milk and how it changed over lactation, particularly in milk fat content (CV 9.1%–11.4%). In three females that were separated from their pups for 4–6 days, milk fat content declined by 20%–23 % and milk protein content increased by 6%–11%. These changes in milk composition indicate that changes in mammary gland function occur rapidly following the onset of milk stasis in harbour seals. The rapid response of the mammary glands to separation suggests that, in direct contrast to the glands of otariids, the glands of harbour seals rely on regular evacuation to maintain normal function. These results suggest that there may be a signifi- Text harbour seal Phoca vitulina Unknown |
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English |
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Individual variation in milk composition over lactation in harbour seals (Phoca vitulina) and the potential consequences of intermittent attendance S.L.C. Lang, S.J. Iverson, and W.D. Bowen Abstract: We studied milk composition over the course of lactation in 21 harbour seal (Phoca vitulina L., 1758) females on Sable Island, Nova Scotia. Milk fat content increased significantly from 40.8 % ± 1.01 % at parturition to 50.2 % ± 1.39 % at day 7 and then remained relatively constant throughout the remainder of lactation. Changes in dry matter mirrored changes in fat content. Protein content averaged about 9 % over mid to late lactation. There was con-siderable between-individual variation in the composition of milk and how it changed over lactation, particularly in milk fat content (CV 9.1%–11.4%). In three females that were separated from their pups for 4–6 days, milk fat content declined by 20%–23 % and milk protein content increased by 6%–11%. These changes in milk composition indicate that changes in mammary gland function occur rapidly following the onset of milk stasis in harbour seals. The rapid response of the mammary glands to separation suggests that, in direct contrast to the glands of otariids, the glands of harbour seals rely on regular evacuation to maintain normal function. These results suggest that there may be a signifi- |
author2 |
The Pennsylvania State University CiteSeerX Archives |
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Text |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.655.6630 http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf |
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harbour seal Phoca vitulina |
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harbour seal Phoca vitulina |
op_source |
http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.655.6630 http://fatlab.biology.dal.ca/wp-content/uploads/2013/06/LangCJZ_2005.pdf |
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1766023316115554304 |