Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution

International audience The estimation of milk consumption in free-ranging seals using tritium dilution techniques makes the key assumption that the animals drink no pre-formed water during the experimental period. However, frequent observations of unweaned Antarctic fur seal pups drinking water at I...

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Main Authors: Lea, Marie-Anne, Bonadonna, Francesco, Hindell, Mark, Guinet, Christophe, Goldsworthy, Simon D.
Other Authors: Antartic Wildlife Research Unit, School of Zoology, University of Tasmania, Centre d'Études Biologiques de Chizé (CEBC), Centre National de la Recherche Scientifique (CNRS), Sea Mammal Ecology Group, La Trobe University Melbourne
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2002
Subjects:
Online Access:https://hal.science/hal-00192081
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record_format openpolar
spelling ftunivnantes:oai:HAL:hal-00192081v1 2023-05-15T13:37:48+02:00 Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution Lea, Marie-Anne Bonadonna, Francesco Hindell, Mark Guinet, Christophe Goldsworthy, Simon D. Antartic Wildlife Research Unit School of Zoology, University of Tasmania Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Sea Mammal Ecology Group La Trobe University Melbourne 2002 https://hal.science/hal-00192081 en eng HAL CCSD Elsevier hal-00192081 https://hal.science/hal-00192081 ISSN: 1095-6433 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology https://hal.science/hal-00192081 Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 2002, 132, pp.321-331 Otariid Pinniped Water drinking Turnover Milk intake Metabolic water production [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2002 ftunivnantes 2023-02-08T08:15:25Z International audience The estimation of milk consumption in free-ranging seals using tritium dilution techniques makes the key assumption that the animals drink no pre-formed water during the experimental period. However, frequent observations of unweaned Antarctic fur seal pups drinking water at Iles Kerguelen necessitated the testing of this assumption. We estimated water flux rates of 30 pups (10.7"0.3 kg) in four experimental groups by isotopic dilution over 4 days. The groups were: (1) pups held in an open air enclosure without access to water to estimate fasting metabolic water production (MWP); (2) free-ranging pups not administered additional water; (3) pups held in an open air enclosure and given a total of 300 ml of fresh water to verify technique accuracy; and (4) free-ranging pups given 200 ml of fresh water. Pups without access to water exhibited water flux rates (20.5"0.8 ml kgy1dy1), which were significantly lower than those observed for the free-ranging group (33.0"1.7 ml kgy1 dy1). Mean estimated pre-formed water intake for the free-ranging experimental groups was 12.6 ml kgy1 dy1. Thus, MWP, measured as total water intake during fasting, may be significantly overestimated in free-ranging Antarctic fur seal pups at Iles Kerguelen and at other sites and subsequently milk intake rates may be underestimated. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Université de Nantes: HAL-UNIV-NANTES Antarctic Kerguelen
institution Open Polar
collection Université de Nantes: HAL-UNIV-NANTES
op_collection_id ftunivnantes
language English
topic Otariid
Pinniped
Water drinking
Turnover
Milk intake
Metabolic water production
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
[SDE.ES]Environmental Sciences/Environmental and Society
[SDE.MCG]Environmental Sciences/Global Changes
spellingShingle Otariid
Pinniped
Water drinking
Turnover
Milk intake
Metabolic water production
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
[SDE.ES]Environmental Sciences/Environmental and Society
[SDE.MCG]Environmental Sciences/Global Changes
Lea, Marie-Anne
Bonadonna, Francesco
Hindell, Mark
Guinet, Christophe
Goldsworthy, Simon D.
Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
topic_facet Otariid
Pinniped
Water drinking
Turnover
Milk intake
Metabolic water production
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
[SDE.ES]Environmental Sciences/Environmental and Society
[SDE.MCG]Environmental Sciences/Global Changes
description International audience The estimation of milk consumption in free-ranging seals using tritium dilution techniques makes the key assumption that the animals drink no pre-formed water during the experimental period. However, frequent observations of unweaned Antarctic fur seal pups drinking water at Iles Kerguelen necessitated the testing of this assumption. We estimated water flux rates of 30 pups (10.7"0.3 kg) in four experimental groups by isotopic dilution over 4 days. The groups were: (1) pups held in an open air enclosure without access to water to estimate fasting metabolic water production (MWP); (2) free-ranging pups not administered additional water; (3) pups held in an open air enclosure and given a total of 300 ml of fresh water to verify technique accuracy; and (4) free-ranging pups given 200 ml of fresh water. Pups without access to water exhibited water flux rates (20.5"0.8 ml kgy1dy1), which were significantly lower than those observed for the free-ranging group (33.0"1.7 ml kgy1 dy1). Mean estimated pre-formed water intake for the free-ranging experimental groups was 12.6 ml kgy1 dy1. Thus, MWP, measured as total water intake during fasting, may be significantly overestimated in free-ranging Antarctic fur seal pups at Iles Kerguelen and at other sites and subsequently milk intake rates may be underestimated.
author2 Antartic Wildlife Research Unit
School of Zoology, University of Tasmania
Centre d'Études Biologiques de Chizé (CEBC)
Centre National de la Recherche Scientifique (CNRS)
Sea Mammal Ecology Group
La Trobe University Melbourne
format Article in Journal/Newspaper
author Lea, Marie-Anne
Bonadonna, Francesco
Hindell, Mark
Guinet, Christophe
Goldsworthy, Simon D.
author_facet Lea, Marie-Anne
Bonadonna, Francesco
Hindell, Mark
Guinet, Christophe
Goldsworthy, Simon D.
author_sort Lea, Marie-Anne
title Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
title_short Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
title_full Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
title_fullStr Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
title_full_unstemmed Drinking behaviour and water turnover rates of Antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
title_sort drinking behaviour and water turnover rates of antarctic fur seal pups: implications for the estimation of milk intake by isotopic dilution
publisher HAL CCSD
publishDate 2002
url https://hal.science/hal-00192081
geographic Antarctic
Kerguelen
geographic_facet Antarctic
Kerguelen
genre Antarc*
Antarctic
Antarctic Fur Seal
genre_facet Antarc*
Antarctic
Antarctic Fur Seal
op_source ISSN: 1095-6433
Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology
https://hal.science/hal-00192081
Comparative Biochemistry and Physiology - Part A: Molecular and Integrative Physiology, 2002, 132, pp.321-331
op_relation hal-00192081
https://hal.science/hal-00192081
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