Measuring changes in juvenile grey seal body composition
Determining body composition in gray seals (Halichoerus grypus) is important when studying their physiology and life history. In this study we investigated the predictability of total body fat (TBF) and protein (TBP) in postweaned gray seal pups from morphometric measurements, blubber thickness usin...
Published in: | Marine Mammal Science |
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Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2007
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/measuring-changes-in-juvenile-grey-seal-body-composition(2f06bd13-ba1f-436c-8b9b-f3bda357d1bb).html https://doi.org/10.1111/j.1748-7692.2007.00132.x http://www.scopus.com/inward/record.url?scp=34250332280&partnerID=8YFLogxK |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/2f06bd13-ba1f-436c-8b9b-f3bda357d1bb 2023-05-15T13:47:48+02:00 Measuring changes in juvenile grey seal body composition Hall, Ailsa Jane McConnell, Bernie J 2007-07 https://risweb.st-andrews.ac.uk/portal/en/researchoutput/measuring-changes-in-juvenile-grey-seal-body-composition(2f06bd13-ba1f-436c-8b9b-f3bda357d1bb).html https://doi.org/10.1111/j.1748-7692.2007.00132.x http://www.scopus.com/inward/record.url?scp=34250332280&partnerID=8YFLogxK eng eng info:eu-repo/semantics/restrictedAccess Hall , A J & McConnell , B J 2007 , ' Measuring changes in juvenile grey seal body composition ' , Marine Mammal Science , vol. 23 , no. 3 , pp. 650-665 . https://doi.org/doi:10.1111/j.1748-7692.2007.00132.x gray seal Halichoerus grypus total body fat total body protein isotope dilution ultrasound BIA survival BIOELECTRICAL-IMPEDANCE ANALYSIS SOUTHERN ELEPHANT SEAL ANTARCTIC FUR SEALS MIROUNGA-LEONINA BLUBBER THICKNESS HARBOR SEAL PHOCA-VITULINA WEANING MASS GREY SEALS PUPS article 2007 ftunstandrewcris https://doi.org/10.1111/j.1748-7692.2007.00132.x 2021-12-26T14:14:10Z Determining body composition in gray seals (Halichoerus grypus) is important when studying their physiology and life history. In this study we investigated the predictability of total body fat (TBF) and protein (TBP) in postweaned gray seal pups from morphometric measurements, blubber thickness using ultrasonographs and bioelectrical impedance analysis (BIA). In postweaned pups, TBF (kg) could be estimated from girth measurements and sex (n = 45, r(2) = 0.878) using hydrogen isotope dilution methods as the reference. However, TBP could not be reliably estimated from morphometric data. TBF (kg) in yearlings was best predicted from mass (n = 6, r(2) = 0.776) and TBP (kg) from mass/length (r(2) = 0.949). Dorsal blubber thickness using B-mode ultrasound was also a significant predictor of TBF (kg) in postweaned pups (r(2) = 0.725) but BIA was not. Marked pups were recaptured during their first few months of life (n = 48) and body composition changes investigated. Animals lost mass and TBF after leaving the breeding beach, largely during the first 5-6 mo of life. Postweaned pups were similar to 40% TBF and similar to 13% TBP whereas yearlings were similar to 12% TBF and similar to 20% TBP. Pups that survived beyond 6 mo of age then regained mass as protein. Morphometric measurements are a useful field indication of body condition when isotope dilution is impractical. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Elephant Seal harbor seal Mirounga leonina Phoca vitulina Southern Elephant Seal University of St Andrews: Research Portal Antarctic Bia ENVELOPE(22.891,22.891,70.317,70.317) Marine Mammal Science 23 3 650 665 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
gray seal Halichoerus grypus total body fat total body protein isotope dilution ultrasound BIA survival BIOELECTRICAL-IMPEDANCE ANALYSIS SOUTHERN ELEPHANT SEAL ANTARCTIC FUR SEALS MIROUNGA-LEONINA BLUBBER THICKNESS HARBOR SEAL PHOCA-VITULINA WEANING MASS GREY SEALS PUPS |
spellingShingle |
gray seal Halichoerus grypus total body fat total body protein isotope dilution ultrasound BIA survival BIOELECTRICAL-IMPEDANCE ANALYSIS SOUTHERN ELEPHANT SEAL ANTARCTIC FUR SEALS MIROUNGA-LEONINA BLUBBER THICKNESS HARBOR SEAL PHOCA-VITULINA WEANING MASS GREY SEALS PUPS Hall, Ailsa Jane McConnell, Bernie J Measuring changes in juvenile grey seal body composition |
topic_facet |
gray seal Halichoerus grypus total body fat total body protein isotope dilution ultrasound BIA survival BIOELECTRICAL-IMPEDANCE ANALYSIS SOUTHERN ELEPHANT SEAL ANTARCTIC FUR SEALS MIROUNGA-LEONINA BLUBBER THICKNESS HARBOR SEAL PHOCA-VITULINA WEANING MASS GREY SEALS PUPS |
description |
Determining body composition in gray seals (Halichoerus grypus) is important when studying their physiology and life history. In this study we investigated the predictability of total body fat (TBF) and protein (TBP) in postweaned gray seal pups from morphometric measurements, blubber thickness using ultrasonographs and bioelectrical impedance analysis (BIA). In postweaned pups, TBF (kg) could be estimated from girth measurements and sex (n = 45, r(2) = 0.878) using hydrogen isotope dilution methods as the reference. However, TBP could not be reliably estimated from morphometric data. TBF (kg) in yearlings was best predicted from mass (n = 6, r(2) = 0.776) and TBP (kg) from mass/length (r(2) = 0.949). Dorsal blubber thickness using B-mode ultrasound was also a significant predictor of TBF (kg) in postweaned pups (r(2) = 0.725) but BIA was not. Marked pups were recaptured during their first few months of life (n = 48) and body composition changes investigated. Animals lost mass and TBF after leaving the breeding beach, largely during the first 5-6 mo of life. Postweaned pups were similar to 40% TBF and similar to 13% TBP whereas yearlings were similar to 12% TBF and similar to 20% TBP. Pups that survived beyond 6 mo of age then regained mass as protein. Morphometric measurements are a useful field indication of body condition when isotope dilution is impractical. |
format |
Article in Journal/Newspaper |
author |
Hall, Ailsa Jane McConnell, Bernie J |
author_facet |
Hall, Ailsa Jane McConnell, Bernie J |
author_sort |
Hall, Ailsa Jane |
title |
Measuring changes in juvenile grey seal body composition |
title_short |
Measuring changes in juvenile grey seal body composition |
title_full |
Measuring changes in juvenile grey seal body composition |
title_fullStr |
Measuring changes in juvenile grey seal body composition |
title_full_unstemmed |
Measuring changes in juvenile grey seal body composition |
title_sort |
measuring changes in juvenile grey seal body composition |
publishDate |
2007 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/measuring-changes-in-juvenile-grey-seal-body-composition(2f06bd13-ba1f-436c-8b9b-f3bda357d1bb).html https://doi.org/10.1111/j.1748-7692.2007.00132.x http://www.scopus.com/inward/record.url?scp=34250332280&partnerID=8YFLogxK |
long_lat |
ENVELOPE(22.891,22.891,70.317,70.317) |
geographic |
Antarctic Bia |
geographic_facet |
Antarctic Bia |
genre |
Antarc* Antarctic Antarctic Fur Seals Elephant Seal harbor seal Mirounga leonina Phoca vitulina Southern Elephant Seal |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Elephant Seal harbor seal Mirounga leonina Phoca vitulina Southern Elephant Seal |
op_source |
Hall , A J & McConnell , B J 2007 , ' Measuring changes in juvenile grey seal body composition ' , Marine Mammal Science , vol. 23 , no. 3 , pp. 650-665 . https://doi.org/doi:10.1111/j.1748-7692.2007.00132.x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1748-7692.2007.00132.x |
container_title |
Marine Mammal Science |
container_volume |
23 |
container_issue |
3 |
container_start_page |
650 |
op_container_end_page |
665 |
_version_ |
1766247901054369792 |