(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307
Changing patterns of sea-ice distribution and extent have measurable effects on polar marine systems. Beyond the obvious impacts of key-habitat loss, it is unclear how such changes will influence ice-associated marine mammals in part because of the logistical difficulties of studying foraging behavi...
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PANGAEA - Data Publisher for Earth & Environmental Science
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Online Access: | https://dx.doi.org/10.1594/pangaea.811213 https://doi.pangaea.de/10.1594/PANGAEA.811213 |
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ftdatacite:10.1594/pangaea.811213 2023-05-15T15:19:25+02:00 (Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 Hindell, Mark A Lydersen, Christian Hop, Haakon Kovacs, Kit Maureen 2012 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.811213 https://doi.pangaea.de/10.1594/PANGAEA.811213 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1371/journal.pone.0038307 https://dx.doi.org/10.1371/journal.pone.0038307.t001 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Species Taxon/taxa Habitat δ15N δ15N, standard deviation δ13C δ13C, standard deviation Sample amount Biological sample Isotope ratio mass spectrometry International Polar Year 2007-2008 IPY Supplementary Dataset dataset Dataset 2012 ftdatacite https://doi.org/10.1594/pangaea.811213 https://doi.org/10.1371/journal.pone.0038307 https://doi.org/10.1371/journal.pone.0038307.t001 2021-11-05T12:55:41Z Changing patterns of sea-ice distribution and extent have measurable effects on polar marine systems. Beyond the obvious impacts of key-habitat loss, it is unclear how such changes will influence ice-associated marine mammals in part because of the logistical difficulties of studying foraging behaviour or other aspects of the ecology of large, mobile animals at sea during the polar winter. This study investigated the diet of pregnant bearded seals (Erignathus barbatus) during three spring breeding periods (2005, 2006 and 2007) with markedly contrasting ice conditions in Svalbard using stable isotopes (d13C and d15N) measured in whiskers collected from their newborn pups. The d15N values in the whiskers of individual seals ranged from 11.95 to 17.45 per mil, spanning almost 2 full trophic levels. Some seals were clearly dietary specialists, despite the species being characterised overall as a generalist predator. This may buffer bearded seal populations from the changes in prey distributions lower in the marine food web which seems to accompany continued changes in temperature and ice cover. Comparisons with isotopic signatures of known prey, suggested that benthic gastropods and decapods were the most common prey. Bayesian isotopic mixing models indicated that diet varied considerably among years. In the year with most fast-ice (2005), the seals had the greatest proportion of pelagic fish and lowest benthic invertebrate content, and during the year with the least ice (2006), the seals ate more benthic invertebrates and less pelagic fish. This suggests that the seals fed further offshore in years with greater ice cover, but moved in to the fjords when ice-cover was minimal, giving them access to different types of prey. Long-term trends of sea ice decline, earlier ice melt, and increased water temperatures in the Arctic are likely to have ecosystem-wide effects, including impacts on the forage bases of pagophilic seals. : Prey species were obtained in Kongsfjorden with trawling (fishes) or by SCUBA diving during the open water season from late April to early September, in 1997 and 2006. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 Dataset Arctic bearded seal Erignathus barbatus International Polar Year IPY Kongsfjord* Kongsfjorden Sea ice Svalbard DataCite Metadata Store (German National Library of Science and Technology) Arctic Svalbard |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Species Taxon/taxa Habitat δ15N δ15N, standard deviation δ13C δ13C, standard deviation Sample amount Biological sample Isotope ratio mass spectrometry International Polar Year 2007-2008 IPY |
spellingShingle |
Species Taxon/taxa Habitat δ15N δ15N, standard deviation δ13C δ13C, standard deviation Sample amount Biological sample Isotope ratio mass spectrometry International Polar Year 2007-2008 IPY Hindell, Mark A Lydersen, Christian Hop, Haakon Kovacs, Kit Maureen (Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
topic_facet |
Species Taxon/taxa Habitat δ15N δ15N, standard deviation δ13C δ13C, standard deviation Sample amount Biological sample Isotope ratio mass spectrometry International Polar Year 2007-2008 IPY |
description |
Changing patterns of sea-ice distribution and extent have measurable effects on polar marine systems. Beyond the obvious impacts of key-habitat loss, it is unclear how such changes will influence ice-associated marine mammals in part because of the logistical difficulties of studying foraging behaviour or other aspects of the ecology of large, mobile animals at sea during the polar winter. This study investigated the diet of pregnant bearded seals (Erignathus barbatus) during three spring breeding periods (2005, 2006 and 2007) with markedly contrasting ice conditions in Svalbard using stable isotopes (d13C and d15N) measured in whiskers collected from their newborn pups. The d15N values in the whiskers of individual seals ranged from 11.95 to 17.45 per mil, spanning almost 2 full trophic levels. Some seals were clearly dietary specialists, despite the species being characterised overall as a generalist predator. This may buffer bearded seal populations from the changes in prey distributions lower in the marine food web which seems to accompany continued changes in temperature and ice cover. Comparisons with isotopic signatures of known prey, suggested that benthic gastropods and decapods were the most common prey. Bayesian isotopic mixing models indicated that diet varied considerably among years. In the year with most fast-ice (2005), the seals had the greatest proportion of pelagic fish and lowest benthic invertebrate content, and during the year with the least ice (2006), the seals ate more benthic invertebrates and less pelagic fish. This suggests that the seals fed further offshore in years with greater ice cover, but moved in to the fjords when ice-cover was minimal, giving them access to different types of prey. Long-term trends of sea ice decline, earlier ice melt, and increased water temperatures in the Arctic are likely to have ecosystem-wide effects, including impacts on the forage bases of pagophilic seals. : Prey species were obtained in Kongsfjorden with trawling (fishes) or by SCUBA diving during the open water season from late April to early September, in 1997 and 2006. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 |
format |
Dataset |
author |
Hindell, Mark A Lydersen, Christian Hop, Haakon Kovacs, Kit Maureen |
author_facet |
Hindell, Mark A Lydersen, Christian Hop, Haakon Kovacs, Kit Maureen |
author_sort |
Hindell, Mark A |
title |
(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
title_short |
(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
title_full |
(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
title_fullStr |
(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
title_full_unstemmed |
(Table 1) Stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (Erignathus barbatus), Svalbard, supplement to: Hindell, Mark A; Lydersen, Christian; Hop, Haakon; Kovacs, Kit Maureen (2012): Pre-Partum Diet of Adult Female Bearded Seals in Years of Contrasting Ice Conditions. PLoS ONE, 7(5), e38307 |
title_sort |
(table 1) stable carbon and nitrogen isotopic ratios of potential prey species of bearded seals (erignathus barbatus), svalbard, supplement to: hindell, mark a; lydersen, christian; hop, haakon; kovacs, kit maureen (2012): pre-partum diet of adult female bearded seals in years of contrasting ice conditions. plos one, 7(5), e38307 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2012 |
url |
https://dx.doi.org/10.1594/pangaea.811213 https://doi.pangaea.de/10.1594/PANGAEA.811213 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic bearded seal Erignathus barbatus International Polar Year IPY Kongsfjord* Kongsfjorden Sea ice Svalbard |
genre_facet |
Arctic bearded seal Erignathus barbatus International Polar Year IPY Kongsfjord* Kongsfjorden Sea ice Svalbard |
op_relation |
https://dx.doi.org/10.1371/journal.pone.0038307 https://dx.doi.org/10.1371/journal.pone.0038307.t001 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.811213 https://doi.org/10.1371/journal.pone.0038307 https://doi.org/10.1371/journal.pone.0038307.t001 |
_version_ |
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