Changes in stable isotope compositions during fasting in phocid seals
peer reviewed RATIONALE: The grey seal, Halichoerus grypus (GS), and the northern elephant seal, Mirounga angustirostris (NES), come ashore for reproduction. This period involves intense physiological processes such as lactation in females and a developmental post-weaning fast in juveniles. Previous...
Published in: | Rapid Communications in Mass Spectrometry |
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Format: | Article in Journal/Newspaper |
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2019
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Online Access: | https://orbi.uliege.be/handle/2268/228898 https://orbi.uliege.be/bitstream/2268/228898/1/Habran_Damseaux_2019_RCMS.pdf https://doi.org/10.1002/rcm.8308 |
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ftorbi:oai:orbi.ulg.ac.be:2268/228898 2024-10-13T14:06:56+00:00 Changes in stable isotope compositions during fasting in phocid seals Habran, Sarah Damseaux, France Pomeroy, Paddy Debier, Cathy Crocker, David Lepoint, Gilles Das, Krishna MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2019 https://orbi.uliege.be/handle/2268/228898 https://orbi.uliege.be/bitstream/2268/228898/1/Habran_Damseaux_2019_RCMS.pdf https://doi.org/10.1002/rcm.8308 en eng John Wiley & Sons urn:issn:0951-4198 urn:issn:1097-0231 https://orbi.uliege.be/handle/2268/228898 info:hdl:2268/228898 https://orbi.uliege.be/bitstream/2268/228898/1/Habran_Damseaux_2019_RCMS.pdf doi:10.1002/rcm.8308 info:pmid:30367531 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Rapid Communications in Mass Spectrometry, 33, 176-184 (2019) stable isotopes seal lactation post-weaning fast reproduction Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2019 ftorbi https://doi.org/10.1002/rcm.8308 2024-09-27T07:01:50Z peer reviewed RATIONALE: The grey seal, Halichoerus grypus (GS), and the northern elephant seal, Mirounga angustirostris (NES), come ashore for reproduction. This period involves intense physiological processes such as lactation in females and a developmental post-weaning fast in juveniles. Previous studies have shown δ13C and δ15N values are affected by starvation, but the precise effects of fasting associated to lactation and post-weaning fast in seals remains poorly understood. METHODS: To examine the effect of lactation and post-weaning fast on stable isotopes in GS and NES, blood and hair were sampled from twenty-one GS mother-pup pairs on the Isle of May and on twenty-two weaned NES pups at Año Nuevo State Reserve during their respective breeding seasons. Milk samples were also collected from GS mothers. Stable isotope measurements were performed with an isotope ratio mass spectrometer coupled to an N-C elemental analyser. RESULTS: Changes in stable isotope ratios in blood components during fasting were similar and weak between GS and NES mothers especially in blood cells (GS: Δ15N = 0.05‰, Δ13C = 0.02‰; NES: Δ15N = 0.1‰, Δ13C = 0.1‰). GS showed a 15N discrimination factor between maternal and pup blood cells and milk, but not for 13C. The strongest relationship between the isotopic compositions of the mother and the pup was observed in the blood cells. CONCLUSIONS: Isotopic consequences of lactation, fasting, and growth seem limited in NES and GS, especially in medium-term integrator tissues of feeding activity such as blood cells. Stable isotope ratios in the blood of pups and mothers are correlated. We observed a subtle mother-to-pup fractionation factor. Our results suggest that pup blood cells are mostly relevant for exploring the ecology of female seals. Article in Journal/Newspaper Elephant Seal University of Liège: ORBi (Open Repository and Bibliography) Nes ENVELOPE(7.634,7.634,62.795,62.795) Nes’ ENVELOPE(44.681,44.681,66.600,66.600) Rapid Communications in Mass Spectrometry 33 2 176 184 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
stable isotopes seal lactation post-weaning fast reproduction Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
spellingShingle |
stable isotopes seal lactation post-weaning fast reproduction Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie Habran, Sarah Damseaux, France Pomeroy, Paddy Debier, Cathy Crocker, David Lepoint, Gilles Das, Krishna Changes in stable isotope compositions during fasting in phocid seals |
topic_facet |
stable isotopes seal lactation post-weaning fast reproduction Life sciences Environmental sciences & ecology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Sciences aquatiques & océanologie |
description |
peer reviewed RATIONALE: The grey seal, Halichoerus grypus (GS), and the northern elephant seal, Mirounga angustirostris (NES), come ashore for reproduction. This period involves intense physiological processes such as lactation in females and a developmental post-weaning fast in juveniles. Previous studies have shown δ13C and δ15N values are affected by starvation, but the precise effects of fasting associated to lactation and post-weaning fast in seals remains poorly understood. METHODS: To examine the effect of lactation and post-weaning fast on stable isotopes in GS and NES, blood and hair were sampled from twenty-one GS mother-pup pairs on the Isle of May and on twenty-two weaned NES pups at Año Nuevo State Reserve during their respective breeding seasons. Milk samples were also collected from GS mothers. Stable isotope measurements were performed with an isotope ratio mass spectrometer coupled to an N-C elemental analyser. RESULTS: Changes in stable isotope ratios in blood components during fasting were similar and weak between GS and NES mothers especially in blood cells (GS: Δ15N = 0.05‰, Δ13C = 0.02‰; NES: Δ15N = 0.1‰, Δ13C = 0.1‰). GS showed a 15N discrimination factor between maternal and pup blood cells and milk, but not for 13C. The strongest relationship between the isotopic compositions of the mother and the pup was observed in the blood cells. CONCLUSIONS: Isotopic consequences of lactation, fasting, and growth seem limited in NES and GS, especially in medium-term integrator tissues of feeding activity such as blood cells. Stable isotope ratios in the blood of pups and mothers are correlated. We observed a subtle mother-to-pup fractionation factor. Our results suggest that pup blood cells are mostly relevant for exploring the ecology of female seals. |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Article in Journal/Newspaper |
author |
Habran, Sarah Damseaux, France Pomeroy, Paddy Debier, Cathy Crocker, David Lepoint, Gilles Das, Krishna |
author_facet |
Habran, Sarah Damseaux, France Pomeroy, Paddy Debier, Cathy Crocker, David Lepoint, Gilles Das, Krishna |
author_sort |
Habran, Sarah |
title |
Changes in stable isotope compositions during fasting in phocid seals |
title_short |
Changes in stable isotope compositions during fasting in phocid seals |
title_full |
Changes in stable isotope compositions during fasting in phocid seals |
title_fullStr |
Changes in stable isotope compositions during fasting in phocid seals |
title_full_unstemmed |
Changes in stable isotope compositions during fasting in phocid seals |
title_sort |
changes in stable isotope compositions during fasting in phocid seals |
publisher |
John Wiley & Sons |
publishDate |
2019 |
url |
https://orbi.uliege.be/handle/2268/228898 https://orbi.uliege.be/bitstream/2268/228898/1/Habran_Damseaux_2019_RCMS.pdf https://doi.org/10.1002/rcm.8308 |
long_lat |
ENVELOPE(7.634,7.634,62.795,62.795) ENVELOPE(44.681,44.681,66.600,66.600) |
geographic |
Nes Nes’ |
geographic_facet |
Nes Nes’ |
genre |
Elephant Seal |
genre_facet |
Elephant Seal |
op_source |
Rapid Communications in Mass Spectrometry, 33, 176-184 (2019) |
op_relation |
urn:issn:0951-4198 urn:issn:1097-0231 https://orbi.uliege.be/handle/2268/228898 info:hdl:2268/228898 https://orbi.uliege.be/bitstream/2268/228898/1/Habran_Damseaux_2019_RCMS.pdf doi:10.1002/rcm.8308 info:pmid:30367531 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/rcm.8308 |
container_title |
Rapid Communications in Mass Spectrometry |
container_volume |
33 |
container_issue |
2 |
container_start_page |
176 |
op_container_end_page |
184 |
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1812813176550457344 |