Changes in stable isotope compositions during fasting in phocid seals
This study was supported by NSF grant #0213095 and by FRFC grant #2.4502.07 (F.R.S.-FNRS). 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 lact...
Published in: | Rapid Communications in Mass Spectrometry |
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Online Access: | https://hdl.handle.net/10023/19164 https://doi.org/10.1002/rcm.8308 |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/19164 2024-04-21T08:01:27+00:00 Changes in stable isotope compositions during fasting in phocid seals Habran, Sarah Damseaux, France Pomeroy, Patrick Debier, Cathy Crocker, Daniel Lepoint, Gilles Das, Krishna NERC University of St Andrews. School of Biology University of St Andrews. Sea Mammal Research Unit University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute University of St Andrews. Centre for Research into Ecological & Environmental Modelling 2019-12-19 9 694854 application/pdf https://hdl.handle.net/10023/19164 https://doi.org/10.1002/rcm.8308 eng eng Rapid Communications in Mass Spectrometry 255222209 863fe73b-4887-44a1-81da-df935699fa3e 85058794411 000453685100003 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 0951-4198 ORCID: /0000-0003-1603-5630/work/51943792 https://hdl.handle.net/10023/19164 doi:10.1002/rcm.8308 NE/R015007/1 Stable isotopes Seal Lactation Post-weaning fast Reproduction GC Oceanography QH301 Biology NDAS NERC GC QH301 Journal article 2019 ftstandrewserep https://doi.org/10.1002/rcm.8308 2024-03-27T15:07:39Z This study was supported by NSF grant #0213095 and by FRFC grant #2.4502.07 (F.R.S.-FNRS). 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 δ13C and δ15N 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: 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. 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. Peer reviewed Article in Journal/Newspaper Elephant Seal University of St Andrews: Digital Research Repository Rapid Communications in Mass Spectrometry 33 2 176 184 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
Stable isotopes Seal Lactation Post-weaning fast Reproduction GC Oceanography QH301 Biology NDAS NERC GC QH301 |
spellingShingle |
Stable isotopes Seal Lactation Post-weaning fast Reproduction GC Oceanography QH301 Biology NDAS NERC GC QH301 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 GC Oceanography QH301 Biology NDAS NERC GC QH301 |
description |
This study was supported by NSF grant #0213095 and by FRFC grant #2.4502.07 (F.R.S.-FNRS). 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 δ13C and δ15N 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: 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. 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. Peer reviewed |
author2 |
NERC University of St Andrews. School of Biology University of St Andrews. Sea Mammal Research Unit University of St Andrews. Marine Alliance for Science & Technology Scotland University of St Andrews. Scottish Oceans Institute University of St Andrews. Centre for Research into Ecological & Environmental Modelling |
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://hdl.handle.net/10023/19164 https://doi.org/10.1002/rcm.8308 |
genre |
Elephant Seal |
genre_facet |
Elephant Seal |
op_relation |
Rapid Communications in Mass Spectrometry 255222209 863fe73b-4887-44a1-81da-df935699fa3e 85058794411 000453685100003 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 0951-4198 ORCID: /0000-0003-1603-5630/work/51943792 https://hdl.handle.net/10023/19164 doi:10.1002/rcm.8308 NE/R015007/1 |
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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1796941619988004864 |