Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores
© 2005 by The University of Chicago Growing juvenile animals undergo many morphological, physiological, and behavioural changes that influence their energetic requirements, patterns of energy use, and ultimately, their survival and reproductive success. We examined changes in mass loss and body comp...
Published in: | Physiological and Biochemical Zoology |
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Language: | English |
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Univ Chicago Press
2005
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Online Access: | http://hdl.handle.net/2440/48224 https://doi.org/10.1086/430227 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/48224 2023-05-15T13:31:58+02:00 Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores Field, I. Bradshaw, C. Burton, H. Hindell, M. 2005 http://hdl.handle.net/2440/48224 https://doi.org/10.1086/430227 en eng Univ Chicago Press Physiological and Biochemical Zoology, 2005; 78(4):491-504 1522-2152 1537-5293 http://hdl.handle.net/2440/48224 doi:10.1086/430227 Bradshaw, C. [0000-0002-5328-7741] Adipose Tissue Animals Seals Earless Proteins Ultrasonography Body Weights and Measures Linear Models Seasons Sex Factors Body Composition Energy Metabolism Antarctic Regions Female Male Lipid Metabolism Journal article 2005 ftunivadelaidedl https://doi.org/10.1086/430227 2023-02-06T07:18:22Z © 2005 by The University of Chicago Growing juvenile animals undergo many morphological, physiological, and behavioural changes that influence their energetic requirements, patterns of energy use, and ultimately, their survival and reproductive success. We examined changes in mass loss and body composition of juvenile southern elephant seals (1- and 2-yr-olds) during their two annual haul-outs. At the start and end of the midyear and molt haul-outs, we caught, weighed, and measured 41 and 14 seals, respectively. We measured blubber depth using ultrasound to estimate body composition (lean and adipose tissue mass). Using energy densities of the adipose and lean tissue, we calculated total, lean, and adipose mass changes and energy expenditure. While molting, juvenile seals used more energy than during the midyear, which is related to the increased use of lean tissue for hair and skin regeneration. The amount of energy used increases with mass as individuals mature. We found sexual differences in energy use where females retained greater fat reserves than males by utilizing more lean tissue. These differences are most likely related to haul-out function and behavior, growth, and earlier development of females toward sexual maturity. Iain C. Field, Corey J. A. Bradshaw, Harry R. Burton, Mark A. Hindell Article in Journal/Newspaper Antarc* Antarctic Elephant Seals Southern Elephant Seals The University of Adelaide: Digital Library Antarctic Bradshaw ENVELOPE(163.867,163.867,-71.467,-71.467) Burton ENVELOPE(166.733,166.733,-72.550,-72.550) Corey ENVELOPE(-145.133,-145.133,-76.667,-76.667) Physiological and Biochemical Zoology 78 4 491 504 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Adipose Tissue Animals Seals Earless Proteins Ultrasonography Body Weights and Measures Linear Models Seasons Sex Factors Body Composition Energy Metabolism Antarctic Regions Female Male Lipid Metabolism |
spellingShingle |
Adipose Tissue Animals Seals Earless Proteins Ultrasonography Body Weights and Measures Linear Models Seasons Sex Factors Body Composition Energy Metabolism Antarctic Regions Female Male Lipid Metabolism Field, I. Bradshaw, C. Burton, H. Hindell, M. Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
topic_facet |
Adipose Tissue Animals Seals Earless Proteins Ultrasonography Body Weights and Measures Linear Models Seasons Sex Factors Body Composition Energy Metabolism Antarctic Regions Female Male Lipid Metabolism |
description |
© 2005 by The University of Chicago Growing juvenile animals undergo many morphological, physiological, and behavioural changes that influence their energetic requirements, patterns of energy use, and ultimately, their survival and reproductive success. We examined changes in mass loss and body composition of juvenile southern elephant seals (1- and 2-yr-olds) during their two annual haul-outs. At the start and end of the midyear and molt haul-outs, we caught, weighed, and measured 41 and 14 seals, respectively. We measured blubber depth using ultrasound to estimate body composition (lean and adipose tissue mass). Using energy densities of the adipose and lean tissue, we calculated total, lean, and adipose mass changes and energy expenditure. While molting, juvenile seals used more energy than during the midyear, which is related to the increased use of lean tissue for hair and skin regeneration. The amount of energy used increases with mass as individuals mature. We found sexual differences in energy use where females retained greater fat reserves than males by utilizing more lean tissue. These differences are most likely related to haul-out function and behavior, growth, and earlier development of females toward sexual maturity. Iain C. Field, Corey J. A. Bradshaw, Harry R. Burton, Mark A. Hindell |
format |
Article in Journal/Newspaper |
author |
Field, I. Bradshaw, C. Burton, H. Hindell, M. |
author_facet |
Field, I. Bradshaw, C. Burton, H. Hindell, M. |
author_sort |
Field, I. |
title |
Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
title_short |
Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
title_full |
Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
title_fullStr |
Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
title_full_unstemmed |
Juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
title_sort |
juvenile southern elephant seals exhibit seasonal differences in energetic requirements and use of lipids and protein stores |
publisher |
Univ Chicago Press |
publishDate |
2005 |
url |
http://hdl.handle.net/2440/48224 https://doi.org/10.1086/430227 |
long_lat |
ENVELOPE(163.867,163.867,-71.467,-71.467) ENVELOPE(166.733,166.733,-72.550,-72.550) ENVELOPE(-145.133,-145.133,-76.667,-76.667) |
geographic |
Antarctic Bradshaw Burton Corey |
geographic_facet |
Antarctic Bradshaw Burton Corey |
genre |
Antarc* Antarctic Elephant Seals Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seals Southern Elephant Seals |
op_relation |
Physiological and Biochemical Zoology, 2005; 78(4):491-504 1522-2152 1537-5293 http://hdl.handle.net/2440/48224 doi:10.1086/430227 Bradshaw, C. [0000-0002-5328-7741] |
op_doi |
https://doi.org/10.1086/430227 |
container_title |
Physiological and Biochemical Zoology |
container_volume |
78 |
container_issue |
4 |
container_start_page |
491 |
op_container_end_page |
504 |
_version_ |
1766023284016545792 |