Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island
Growth in body mass in pups of the subantarctic fur seal Arctocephalus tropicalis was studied at Amsterdam Island, southern Indian Ocean during the rearing period between December 1995 and August 1996. We examined the change in the rates of mass gain and mass loss with pup age to explain the overall...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2000
|
Subjects: | |
Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/growth-in-pups-of-the-subantarctic-fur-seal-arctocephalus-tropicalis-on-amsterdam-island(6a412699-7086-4536-8504-182d935d9215).html |
id |
ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/6a412699-7086-4536-8504-182d935d9215 |
---|---|
record_format |
openpolar |
spelling |
ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/6a412699-7086-4536-8504-182d935d9215 2023-05-15T13:22:27+02:00 Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island Guinet, C Georges, Jean-Yves 2000-07 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/growth-in-pups-of-the-subantarctic-fur-seal-arctocephalus-tropicalis-on-amsterdam-island(6a412699-7086-4536-8504-182d935d9215).html eng eng info:eu-repo/semantics/restrictedAccess Guinet , C & Georges , J-Y 2000 , ' Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island ' , Journal of Zoology , vol. 251 , pp. 289-296 . subantarctic fur seal Arctocephalus tropicalis pup growth mass gain mass loss GAZELLA PUPS MATERNAL INVESTMENT SOUTH GEORGIA MASS EFFICIENCY SIZE article 2000 ftunstandrewcris 2021-12-26T14:10:34Z Growth in body mass in pups of the subantarctic fur seal Arctocephalus tropicalis was studied at Amsterdam Island, southern Indian Ocean during the rearing period between December 1995 and August 1996. We examined the change in the rates of mass gain and mass loss with pup age to explain the overall change in mass throughout the rearing period, when mothers alternate foraging trips at sea and attendance periods ashore. In the absence of their mothers, pups fast and lose mass. During the maternal attendance period ashore pups suck and gain mass. There was no significant difference in the rate of growth in mass between male and female pups. The rate of loss in mass during a fasting event was positively related to the initial body mass but negatively related to the age and duration of the fast of the pup. The rate of mass loss was best related to pup age by a quadratic relationship. The rate of mass loss increased until pups were 120 days old and then decreased until the end of the study period. The rate of gain in mass following a maternal foraging trip was positively related to the initial pup mass but negatively related to the foraging trip duration, and we found that the rate of mass gain decreased linearly with the age of the pup. The concomitant decrease in the rate of mass loss and mass gain for pups > 120 days old allowed pups to maintain a positive growth until they were 220 days old. After 220 days of age the rate of mass loss exceeded the rate of mass gain and the pups start to lose mass until weaning. Article in Journal/Newspaper Amsterdam Island University of St Andrews: Research Portal Indian |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
subantarctic fur seal Arctocephalus tropicalis pup growth mass gain mass loss GAZELLA PUPS MATERNAL INVESTMENT SOUTH GEORGIA MASS EFFICIENCY SIZE |
spellingShingle |
subantarctic fur seal Arctocephalus tropicalis pup growth mass gain mass loss GAZELLA PUPS MATERNAL INVESTMENT SOUTH GEORGIA MASS EFFICIENCY SIZE Guinet, C Georges, Jean-Yves Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
topic_facet |
subantarctic fur seal Arctocephalus tropicalis pup growth mass gain mass loss GAZELLA PUPS MATERNAL INVESTMENT SOUTH GEORGIA MASS EFFICIENCY SIZE |
description |
Growth in body mass in pups of the subantarctic fur seal Arctocephalus tropicalis was studied at Amsterdam Island, southern Indian Ocean during the rearing period between December 1995 and August 1996. We examined the change in the rates of mass gain and mass loss with pup age to explain the overall change in mass throughout the rearing period, when mothers alternate foraging trips at sea and attendance periods ashore. In the absence of their mothers, pups fast and lose mass. During the maternal attendance period ashore pups suck and gain mass. There was no significant difference in the rate of growth in mass between male and female pups. The rate of loss in mass during a fasting event was positively related to the initial body mass but negatively related to the age and duration of the fast of the pup. The rate of mass loss was best related to pup age by a quadratic relationship. The rate of mass loss increased until pups were 120 days old and then decreased until the end of the study period. The rate of gain in mass following a maternal foraging trip was positively related to the initial pup mass but negatively related to the foraging trip duration, and we found that the rate of mass gain decreased linearly with the age of the pup. The concomitant decrease in the rate of mass loss and mass gain for pups > 120 days old allowed pups to maintain a positive growth until they were 220 days old. After 220 days of age the rate of mass loss exceeded the rate of mass gain and the pups start to lose mass until weaning. |
format |
Article in Journal/Newspaper |
author |
Guinet, C Georges, Jean-Yves |
author_facet |
Guinet, C Georges, Jean-Yves |
author_sort |
Guinet, C |
title |
Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
title_short |
Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
title_full |
Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
title_fullStr |
Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
title_full_unstemmed |
Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island |
title_sort |
growth in pups of the subantarctic fur seal (arctocephalus tropicalis) on amsterdam island |
publishDate |
2000 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/growth-in-pups-of-the-subantarctic-fur-seal-arctocephalus-tropicalis-on-amsterdam-island(6a412699-7086-4536-8504-182d935d9215).html |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Amsterdam Island |
genre_facet |
Amsterdam Island |
op_source |
Guinet , C & Georges , J-Y 2000 , ' Growth in pups of the subantarctic fur seal (Arctocephalus tropicalis) on Amsterdam Island ' , Journal of Zoology , vol. 251 , pp. 289-296 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766365001535193088 |