Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska
We developed models to predict foraging habitat of adult female northern fur seals (Callorhinus ursinus) using stable carbon (δ13C) and nitrogen (δ15N) isotope values from plasma and red blood cells. Binomial generalized linear mixed models were developed using blood isotope samples collected from 3...
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ftpubmed:oai:pubmedcentral.nih.gov:4451762 2023-05-15T18:48:48+02:00 Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska Zeppelin, T. K. Johnson, D. S. Kuhn, C. E. Iverson, S. J. Ream, R. R. 2015-06-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451762/ http://www.ncbi.nlm.nih.gov/pubmed/26030280 https://doi.org/10.1371/journal.pone.0127615 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451762/ http://www.ncbi.nlm.nih.gov/pubmed/26030280 http://dx.doi.org/10.1371/journal.pone.0127615 https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication CC0 PDM Research Article Text 2015 ftpubmed https://doi.org/10.1371/journal.pone.0127615 2015-06-14T00:07:38Z We developed models to predict foraging habitat of adult female northern fur seals (Callorhinus ursinus) using stable carbon (δ13C) and nitrogen (δ15N) isotope values from plasma and red blood cells. Binomial generalized linear mixed models were developed using blood isotope samples collected from 35 adult female fur seals on three breeding colonies in Alaska during July-October 2006. Satellite location and dive data were used to define habitat use in terms of the proportion of time spent or dives made in different oceanographic/bathymetric domains. For both plasma and red blood cells, the models accurately predicted habitat use for animals that foraged exclusively off or on the continental shelf. The models did not perform as well in predicting habitat use for animals that foraged in both on- and off-shelf habitat; however, sample sizes for these animals were small. Concurrently collected scat, fatty acid, and dive data confirmed that the foraging differences predicted by isotopes were associated with diet differences. Stable isotope samples, dive data, and GPS location data collected from an additional 15 females during August-October 2008 validated the effective use of the models across years. Little within year variation in habitat use was indicated from the comparison between stable isotope values from plasma (representing 1-2 weeks) and red blood cells (representing the prior few months). Constructing predictive models using stable isotopes provides an effective means to assess habitat use at the population level, is inexpensive, and can be applied to other marine predators. Text Alaska Callorhinus ursinus PubMed Central (PMC) PLOS ONE 10 6 e0127615 |
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Research Article Zeppelin, T. K. Johnson, D. S. Kuhn, C. E. Iverson, S. J. Ream, R. R. Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
topic_facet |
Research Article |
description |
We developed models to predict foraging habitat of adult female northern fur seals (Callorhinus ursinus) using stable carbon (δ13C) and nitrogen (δ15N) isotope values from plasma and red blood cells. Binomial generalized linear mixed models were developed using blood isotope samples collected from 35 adult female fur seals on three breeding colonies in Alaska during July-October 2006. Satellite location and dive data were used to define habitat use in terms of the proportion of time spent or dives made in different oceanographic/bathymetric domains. For both plasma and red blood cells, the models accurately predicted habitat use for animals that foraged exclusively off or on the continental shelf. The models did not perform as well in predicting habitat use for animals that foraged in both on- and off-shelf habitat; however, sample sizes for these animals were small. Concurrently collected scat, fatty acid, and dive data confirmed that the foraging differences predicted by isotopes were associated with diet differences. Stable isotope samples, dive data, and GPS location data collected from an additional 15 females during August-October 2008 validated the effective use of the models across years. Little within year variation in habitat use was indicated from the comparison between stable isotope values from plasma (representing 1-2 weeks) and red blood cells (representing the prior few months). Constructing predictive models using stable isotopes provides an effective means to assess habitat use at the population level, is inexpensive, and can be applied to other marine predators. |
format |
Text |
author |
Zeppelin, T. K. Johnson, D. S. Kuhn, C. E. Iverson, S. J. Ream, R. R. |
author_facet |
Zeppelin, T. K. Johnson, D. S. Kuhn, C. E. Iverson, S. J. Ream, R. R. |
author_sort |
Zeppelin, T. K. |
title |
Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
title_short |
Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
title_full |
Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
title_fullStr |
Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
title_full_unstemmed |
Stable Isotope Models Predict Foraging Habitat of Northern Fur Seals (Callorhinus ursinus) in Alaska |
title_sort |
stable isotope models predict foraging habitat of northern fur seals (callorhinus ursinus) in alaska |
publisher |
Public Library of Science |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451762/ http://www.ncbi.nlm.nih.gov/pubmed/26030280 https://doi.org/10.1371/journal.pone.0127615 |
genre |
Alaska Callorhinus ursinus |
genre_facet |
Alaska Callorhinus ursinus |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4451762/ http://www.ncbi.nlm.nih.gov/pubmed/26030280 http://dx.doi.org/10.1371/journal.pone.0127615 |
op_rights |
https://creativecommons.org/publicdomain/zero/1.0/ This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 (https://creativecommons.org/publicdomain/zero/1.0/) public domain dedication |
op_rightsnorm |
CC0 PDM |
op_doi |
https://doi.org/10.1371/journal.pone.0127615 |
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PLOS ONE |
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10 |
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6 |
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e0127615 |
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