Changes in stable isotope compositions during fasting in phocid seals
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...
Published in: | Rapid Communications in Mass Spectrometry |
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2019
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/changes-in-stable-isotope-compositions-during-fasting-in-phocid-seals(863fe73b-4887-44a1-81da-df935699fa3e).html https://doi.org/10.1002/rcm.8308 https://research-repository.st-andrews.ac.uk/bitstream/10023/19164/1/Habran_2018_RCMS_Fasting_AAM.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/863fe73b-4887-44a1-81da-df935699fa3e 2023-05-15T16:05:24+02:00 Changes in stable isotope compositions during fasting in phocid seals Habran, Sarah Damseaux, France Pomeroy, Patrick Debier, Cathy Crocker, Daniel Lepoint, Gilles Das, Krishna 2019-01-30 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/changes-in-stable-isotope-compositions-during-fasting-in-phocid-seals(863fe73b-4887-44a1-81da-df935699fa3e).html https://doi.org/10.1002/rcm.8308 https://research-repository.st-andrews.ac.uk/bitstream/10023/19164/1/Habran_2018_RCMS_Fasting_AAM.pdf eng eng info:eu-repo/semantics/openAccess Habran , S , Damseaux , F , Pomeroy , P , Debier , C , Crocker , D , Lepoint , G & Das , K 2019 , ' Changes in stable isotope compositions during fasting in phocid seals ' , Rapid Communications in Mass Spectrometry , vol. 33 , no. 2 , pp. 176-184 . https://doi.org/10.1002/rcm.8308 Stable isotopes Seal Lactation Post-weaning fast Reproduction article 2019 ftunstandrewcris https://doi.org/10.1002/rcm.8308 2021-12-26T14:32:30Z 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 that δ 13 C and δ 15 N values are affected by starvation, but the precise effects of fasting associated to lactation and post‐weaning fast in seals remain poorly understood. Methods: To examine the effect of lactation and post‐weaning fast on stable isotope ratios 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: Δ 15 N = 0.05‰, Δ 13 C = 0.02‰; NES: Δ 15 N = 0.1‰, Δ 13 C = 0.1‰). GS showed a 15 N discrimination factor between maternal and pup blood cells and milk, but not for 13 C. The strongest relationship between the isotopic compositions of the mother and the pup was observed in the blood cells. Conclusion: 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 St Andrews: Research Portal 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 St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Stable isotopes Seal Lactation Post-weaning fast Reproduction |
spellingShingle |
Stable isotopes Seal Lactation Post-weaning fast Reproduction Habran, Sarah Damseaux, France Pomeroy, Patrick Debier, Cathy Crocker, Daniel Lepoint, Gilles Das, Krishna Changes in stable isotope compositions during fasting in phocid seals |
topic_facet |
Stable isotopes Seal Lactation Post-weaning fast Reproduction |
description |
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 that δ 13 C and δ 15 N values are affected by starvation, but the precise effects of fasting associated to lactation and post‐weaning fast in seals remain poorly understood. Methods: To examine the effect of lactation and post‐weaning fast on stable isotope ratios 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: Δ 15 N = 0.05‰, Δ 13 C = 0.02‰; NES: Δ 15 N = 0.1‰, Δ 13 C = 0.1‰). GS showed a 15 N discrimination factor between maternal and pup blood cells and milk, but not for 13 C. The strongest relationship between the isotopic compositions of the mother and the pup was observed in the blood cells. Conclusion: 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. |
format |
Article in Journal/Newspaper |
author |
Habran, Sarah Damseaux, France Pomeroy, Patrick Debier, Cathy Crocker, Daniel Lepoint, Gilles Das, Krishna |
author_facet |
Habran, Sarah Damseaux, France Pomeroy, Patrick Debier, Cathy Crocker, Daniel 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 |
publishDate |
2019 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/changes-in-stable-isotope-compositions-during-fasting-in-phocid-seals(863fe73b-4887-44a1-81da-df935699fa3e).html https://doi.org/10.1002/rcm.8308 https://research-repository.st-andrews.ac.uk/bitstream/10023/19164/1/Habran_2018_RCMS_Fasting_AAM.pdf |
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 |
Habran , S , Damseaux , F , Pomeroy , P , Debier , C , Crocker , D , Lepoint , G & Das , K 2019 , ' Changes in stable isotope compositions during fasting in phocid seals ' , Rapid Communications in Mass Spectrometry , vol. 33 , no. 2 , pp. 176-184 . https://doi.org/10.1002/rcm.8308 |
op_rights |
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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1766401293250723840 |