Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults
In species exhibiting differential migration by sex and age, understanding what differences exist, and the adaptive reasons for these differences is critical for determining how demographic groups will respond to environmental variability and anthropogenic perturbations. We used satellite-telemetere...
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ftunivtasecite:oai:ecite.utas.edu.au:135119 2023-05-15T18:49:37+02:00 Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults Zeppelin, T Pelland, N Sterling, J Brost, B Melin, S Johnson, D Lea, M-A Ream, R 2019 application/pdf https://doi.org/10.1038/s41598-019-50230-z http://www.ncbi.nlm.nih.gov/pubmed/31558737 http://ecite.utas.edu.au/135119 en eng Nature Publishing Group http://ecite.utas.edu.au/135119/1/135119 - Migratory strategies of juvenile northern fur seals.pdf http://dx.doi.org/10.1038/s41598-019-50230-z Zeppelin, T and Pelland, N and Sterling, J and Brost, B and Melin, S and Johnson, D and Lea, M-A and Ream, R, Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults, Scientific Reports, 9 Article 13921. ISSN 2045-2322 (2019) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/31558737 http://ecite.utas.edu.au/135119 Biological Sciences Ecology Behavioural Ecology Refereed Article PeerReviewed 2019 ftunivtasecite https://doi.org/10.1038/s41598-019-50230-z 2020-01-13T23:16:16Z In species exhibiting differential migration by sex and age, understanding what differences exist, and the adaptive reasons for these differences is critical for determining how demographic groups will respond to environmental variability and anthropogenic perturbations. We used satellite-telemetered movement and diving data to investigate differential migration and its ontogeny in a highly migratory North Pacific Ocean predator, the northern fur seal ( Callorhinus ursinus NFS), with a focus on understudied juvenile (1- to 2-year-old) animals. We instrumented 71 juvenile NFS in two years (200607 and 200708) at three major North American breeding sites and compared their migratory strategies with pups and adults. Although sexual dimorphism is strong in adult NFS, only weak differences in body mass between sexes were found in juveniles, which had similar body mass to pups (~34 months). However, unlike widely-dispersed pups, juvenile male and female NFS dispersed in different directions, and used different habitats characterized by distinct hydrography and prey assemblages during migration, similar to breeding adults. Juvenile diving behavior differed only modestly among habitats and between sexes, consistent with weak differences in body mass. Evidence of habitat sexual segregation by juvenile NFS contradicts previous hypotheses that physiological differences predominantly drive the ontogeny of differential migration. Article in Journal/Newspaper Callorhinus ursinus Northern fur seal eCite UTAS (University of Tasmania) Pacific Scientific Reports 9 1 |
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eCite UTAS (University of Tasmania) |
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English |
topic |
Biological Sciences Ecology Behavioural Ecology |
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Biological Sciences Ecology Behavioural Ecology Zeppelin, T Pelland, N Sterling, J Brost, B Melin, S Johnson, D Lea, M-A Ream, R Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
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Biological Sciences Ecology Behavioural Ecology |
description |
In species exhibiting differential migration by sex and age, understanding what differences exist, and the adaptive reasons for these differences is critical for determining how demographic groups will respond to environmental variability and anthropogenic perturbations. We used satellite-telemetered movement and diving data to investigate differential migration and its ontogeny in a highly migratory North Pacific Ocean predator, the northern fur seal ( Callorhinus ursinus NFS), with a focus on understudied juvenile (1- to 2-year-old) animals. We instrumented 71 juvenile NFS in two years (200607 and 200708) at three major North American breeding sites and compared their migratory strategies with pups and adults. Although sexual dimorphism is strong in adult NFS, only weak differences in body mass between sexes were found in juveniles, which had similar body mass to pups (~34 months). However, unlike widely-dispersed pups, juvenile male and female NFS dispersed in different directions, and used different habitats characterized by distinct hydrography and prey assemblages during migration, similar to breeding adults. Juvenile diving behavior differed only modestly among habitats and between sexes, consistent with weak differences in body mass. Evidence of habitat sexual segregation by juvenile NFS contradicts previous hypotheses that physiological differences predominantly drive the ontogeny of differential migration. |
format |
Article in Journal/Newspaper |
author |
Zeppelin, T Pelland, N Sterling, J Brost, B Melin, S Johnson, D Lea, M-A Ream, R |
author_facet |
Zeppelin, T Pelland, N Sterling, J Brost, B Melin, S Johnson, D Lea, M-A Ream, R |
author_sort |
Zeppelin, T |
title |
Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
title_short |
Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
title_full |
Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
title_fullStr |
Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
title_full_unstemmed |
Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults |
title_sort |
migratory strategies of juvenile northern fur seals ( callorhinus ursinus ): bridging the gap between pups and adults |
publisher |
Nature Publishing Group |
publishDate |
2019 |
url |
https://doi.org/10.1038/s41598-019-50230-z http://www.ncbi.nlm.nih.gov/pubmed/31558737 http://ecite.utas.edu.au/135119 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Callorhinus ursinus Northern fur seal |
genre_facet |
Callorhinus ursinus Northern fur seal |
op_relation |
http://ecite.utas.edu.au/135119/1/135119 - Migratory strategies of juvenile northern fur seals.pdf http://dx.doi.org/10.1038/s41598-019-50230-z Zeppelin, T and Pelland, N and Sterling, J and Brost, B and Melin, S and Johnson, D and Lea, M-A and Ream, R, Migratory strategies of juvenile northern fur seals ( Callorhinus ursinus ): bridging the gap between pups and adults, Scientific Reports, 9 Article 13921. ISSN 2045-2322 (2019) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/31558737 http://ecite.utas.edu.au/135119 |
op_doi |
https://doi.org/10.1038/s41598-019-50230-z |
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Scientific Reports |
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9 |
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1 |
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1766243229666115584 |