Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella)
Plasma leptin levels were determined in 8 lactating female and 20 pup Antarctic fur seals (Arctocephalus ga:ella) during fasting periods of normal duration. Plasma leptin levels ranged from 1.35-3.19 ng.ml(-1) in lactating females and 1.79-4.80 ng.ml(-1) in pups and were not positively correlated wi...
Published in: | Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology |
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2002
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Online Access: | http://nora.nerc.ac.uk/id/eprint/13107/ |
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ftnerc:oai:nora.nerc.ac.uk:13107 2023-05-15T13:45:11+02:00 Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) Arnould, J.P.Y. Morris, M.J. Rawlins, D.R. Boyd, I.L. 2002 http://nora.nerc.ac.uk/id/eprint/13107/ unknown Springer-Verlag Arnould, J.P.Y.; Morris, M.J.; Rawlins, D.R.; Boyd, I.L. 2002 Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella). Journal of Comparative Physiology B, 172 (1). 27-34. https://doi.org/10.1007/s003600100224 <https://doi.org/10.1007/s003600100224> Marine Sciences Biology and Microbiology Publication - Article PeerReviewed 2002 ftnerc https://doi.org/10.1007/s003600100224 2023-02-04T19:28:26Z Plasma leptin levels were determined in 8 lactating female and 20 pup Antarctic fur seals (Arctocephalus ga:ella) during fasting periods of normal duration. Plasma leptin levels ranged from 1.35-3.19 ng.ml(-1) in lactating females and 1.79-4.80 ng.ml(-1) in pups and were not positively correlated with body mass or condition. A negative trend, however, was observed between plasma leptin levels and body condition in lactating females upon their arrival at the colony following a foraging trip (beginning of fast). In accordance with findings in other species, plasma leptin levels dropped significantly (P <0.02) in response to the 17-19% drop in body mass experienced by pups during fasting. In contrast, plasma leptin levels in lactating females increased during the first 24 h of fasting before decreasing throughout the remaining 48 h of the fast. This unexpected result could be due to the high level of energy expenditure by seals as they swim back to the colony (i.e. post-exercise response) or may be influenced by the intense suckling activity experienced by females during the onshore fasting periods. The results of this study support recent findings in other carnivore species which suggest the primary physiological role of leptin in these species may not necessarily be as a signal of the magnitude of body energy reserves. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Natural Environment Research Council: NERC Open Research Archive 20 Pup ENVELOPE(-139.146,-139.146,64.023,64.023) Antarctic Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology 172 1 27 34 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Marine Sciences Biology and Microbiology |
spellingShingle |
Marine Sciences Biology and Microbiology Arnould, J.P.Y. Morris, M.J. Rawlins, D.R. Boyd, I.L. Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
topic_facet |
Marine Sciences Biology and Microbiology |
description |
Plasma leptin levels were determined in 8 lactating female and 20 pup Antarctic fur seals (Arctocephalus ga:ella) during fasting periods of normal duration. Plasma leptin levels ranged from 1.35-3.19 ng.ml(-1) in lactating females and 1.79-4.80 ng.ml(-1) in pups and were not positively correlated with body mass or condition. A negative trend, however, was observed between plasma leptin levels and body condition in lactating females upon their arrival at the colony following a foraging trip (beginning of fast). In accordance with findings in other species, plasma leptin levels dropped significantly (P <0.02) in response to the 17-19% drop in body mass experienced by pups during fasting. In contrast, plasma leptin levels in lactating females increased during the first 24 h of fasting before decreasing throughout the remaining 48 h of the fast. This unexpected result could be due to the high level of energy expenditure by seals as they swim back to the colony (i.e. post-exercise response) or may be influenced by the intense suckling activity experienced by females during the onshore fasting periods. The results of this study support recent findings in other carnivore species which suggest the primary physiological role of leptin in these species may not necessarily be as a signal of the magnitude of body energy reserves. |
format |
Article in Journal/Newspaper |
author |
Arnould, J.P.Y. Morris, M.J. Rawlins, D.R. Boyd, I.L. |
author_facet |
Arnould, J.P.Y. Morris, M.J. Rawlins, D.R. Boyd, I.L. |
author_sort |
Arnould, J.P.Y. |
title |
Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
title_short |
Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
title_full |
Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
title_fullStr |
Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
title_full_unstemmed |
Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella) |
title_sort |
variation in plasma leptin levels in response to fasting in antarctic fur seals (arctocephalus gazella) |
publisher |
Springer-Verlag |
publishDate |
2002 |
url |
http://nora.nerc.ac.uk/id/eprint/13107/ |
long_lat |
ENVELOPE(-139.146,-139.146,64.023,64.023) |
geographic |
20 Pup Antarctic |
geographic_facet |
20 Pup Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
op_relation |
Arnould, J.P.Y.; Morris, M.J.; Rawlins, D.R.; Boyd, I.L. 2002 Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella). Journal of Comparative Physiology B, 172 (1). 27-34. https://doi.org/10.1007/s003600100224 <https://doi.org/10.1007/s003600100224> |
op_doi |
https://doi.org/10.1007/s003600100224 |
container_title |
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology |
container_volume |
172 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
34 |
_version_ |
1766215376074440704 |