Ontogeny of body size and shape of Antarctic and subantactic fur seals
International audience Pre and postweaning functional demands on body size and shape of mammals are often in conflict, especially in species where weaning involves a change of habitat. Compared with long lactations, brief lactations are expected to be associated with fast rates of development and...
Published in: | Canadian Journal of Zoology |
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ftccsdartic:oai:HAL:hal-00325826v1 2024-02-27T08:33:30+00:00 Ontogeny of body size and shape of Antarctic and subantactic fur seals Luque, Sebastian P. Miller, Edward H. Arnould, John P.Y. Chambellant, Magaly Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Department of Biology Memorial University School of Life and Environmental Sciences Deakin University Burwood 2007-12-21 https://hal.science/hal-00325826 https://doi.org/10.1139/Z07-092 en eng HAL CCSD NRC Research Press info:eu-repo/semantics/altIdentifier/doi/10.1139/Z07-092 hal-00325826 https://hal.science/hal-00325826 doi:10.1139/Z07-092 ISSN: 0008-4301 EISSN: 1480-3283 Canadian Journal of Zoology https://hal.science/hal-00325826 Canadian Journal of Zoology, 2007, 85, pp.1275-1285. ⟨10.1139/Z07-092⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2007 ftccsdartic https://doi.org/10.1139/Z07-092 2024-01-28T01:52:44Z International audience Pre and postweaning functional demands on body size and shape of mammals are often in conflict, especially in species where weaning involves a change of habitat. Compared with long lactations, brief lactations are expected to be associated with fast rates of development and attainment of adult traits. We describe allometry and growth for several morphological traits in two closely related fur seal species with large differences in lactation duration at a sympatric site. Longitudinal data were collected from Antarctic (Arctocephalus gazella (Peters, 1875); 120 d lactation) and subantarctic (Arctocephalus tropicalis (Gray, 1872); 300 d lactation) fur seals. Body mass was similar in neonates of both species, but A. gazella neonates were longer, less voluminous, and had larger foreflippers. The species were similar in rate of prewean ing growth in body mass, but growth rates of linear variables were faster for A. gazella pups. Consequently, neonatal differ ences in body shape increased over lactation, and A. gazella pups approached adult body shape faster than did A. tropicalis pups. Our results indicate that preweaning growth is associated with significant changes in body shape, involving the acquis ition of a longer, more slender body with larger foreflippers in A. gazella. These differences suggest that A. gazella pups are physically more mature at approximately 100 d of age (close to weaning age) than A. tropicalis pups of the same age. Article in Journal/Newspaper Antarc* Antarctic Arctocephalus gazella Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Canadian Journal of Zoology 85 12 1275 1285 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes Luque, Sebastian P. Miller, Edward H. Arnould, John P.Y. Chambellant, Magaly Guinet, Christophe Ontogeny of body size and shape of Antarctic and subantactic fur seals |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environment and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Pre and postweaning functional demands on body size and shape of mammals are often in conflict, especially in species where weaning involves a change of habitat. Compared with long lactations, brief lactations are expected to be associated with fast rates of development and attainment of adult traits. We describe allometry and growth for several morphological traits in two closely related fur seal species with large differences in lactation duration at a sympatric site. Longitudinal data were collected from Antarctic (Arctocephalus gazella (Peters, 1875); 120 d lactation) and subantarctic (Arctocephalus tropicalis (Gray, 1872); 300 d lactation) fur seals. Body mass was similar in neonates of both species, but A. gazella neonates were longer, less voluminous, and had larger foreflippers. The species were similar in rate of prewean ing growth in body mass, but growth rates of linear variables were faster for A. gazella pups. Consequently, neonatal differ ences in body shape increased over lactation, and A. gazella pups approached adult body shape faster than did A. tropicalis pups. Our results indicate that preweaning growth is associated with significant changes in body shape, involving the acquis ition of a longer, more slender body with larger foreflippers in A. gazella. These differences suggest that A. gazella pups are physically more mature at approximately 100 d of age (close to weaning age) than A. tropicalis pups of the same age. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Department of Biology Memorial University School of Life and Environmental Sciences Deakin University Burwood |
format |
Article in Journal/Newspaper |
author |
Luque, Sebastian P. Miller, Edward H. Arnould, John P.Y. Chambellant, Magaly Guinet, Christophe |
author_facet |
Luque, Sebastian P. Miller, Edward H. Arnould, John P.Y. Chambellant, Magaly Guinet, Christophe |
author_sort |
Luque, Sebastian P. |
title |
Ontogeny of body size and shape of Antarctic and subantactic fur seals |
title_short |
Ontogeny of body size and shape of Antarctic and subantactic fur seals |
title_full |
Ontogeny of body size and shape of Antarctic and subantactic fur seals |
title_fullStr |
Ontogeny of body size and shape of Antarctic and subantactic fur seals |
title_full_unstemmed |
Ontogeny of body size and shape of Antarctic and subantactic fur seals |
title_sort |
ontogeny of body size and shape of antarctic and subantactic fur seals |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00325826 https://doi.org/10.1139/Z07-092 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Arctocephalus gazella |
op_source |
ISSN: 0008-4301 EISSN: 1480-3283 Canadian Journal of Zoology https://hal.science/hal-00325826 Canadian Journal of Zoology, 2007, 85, pp.1275-1285. ⟨10.1139/Z07-092⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1139/Z07-092 hal-00325826 https://hal.science/hal-00325826 doi:10.1139/Z07-092 |
op_doi |
https://doi.org/10.1139/Z07-092 |
container_title |
Canadian Journal of Zoology |
container_volume |
85 |
container_issue |
12 |
container_start_page |
1275 |
op_container_end_page |
1285 |
_version_ |
1792045979694792704 |