Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East
After a dramatic population decline, Steller sea lions have begun to recover throughout most of their range. However, Steller sea lions in the Western Aleutians and Commander Islands are continuing to decline. Comparing survival rates between regions with different population trends may provide insi...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:89247 2023-07-02T03:32:48+02:00 Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East Altukhov, Alexey V. Andrews, Russel D. Calkins, Donald G. Gelatt, Thomas S. Gurarie, Eliezer D. Loughlin, Thomas R. Mamaev, Evgeny G. Nikulin, Victor S. Permyakov, Peter A. Ryazanov, Sergey D. Vertyankin, Vladimir V. Burkanov, Vladimir N. 2015-06-02T21:54:45.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-ws-gv1l https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:89247 unknown doi:10.5061/dryad.885hk/1 doi:10.1371/journal.pone.0127292 PMID:26016772 http://nbn-resolving.org/urn:nbn:nl:ui:13-ws-gv1l doi:10.5061/dryad.885hk https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:89247 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2015 ftdans https://doi.org/10.5061/dryad.885hk/110.1371/journal.pone.012729210.5061/dryad.885hk 2023-06-13T13:19:13Z After a dramatic population decline, Steller sea lions have begun to recover throughout most of their range. However, Steller sea lions in the Western Aleutians and Commander Islands are continuing to decline. Comparing survival rates between regions with different population trends may provide insights into the factors driving the dynamics, but published data on vital rates have been extremely scarce, especially in regions where the populations are still declining. Fortunately, an unprecedented dataset of marked Steller sea lions at rookeries in the Russian Far East is available, allowing us to determine age and sex specific survival in sea lions up to 22 years old. We focused on survival rates in three areas in the Russian range with differing population trends: the Commander Islands (Medny Island rookery), Eastern Kamchatka (Kozlov Cape rookery) and the Kuril Islands (four rookeries). Survival rates differed between these three regions, though not necessarily as predicted by population trends. Pup survival was higher where the populations were declining (Medny Island) or not recovering (Kozlov Cape) than in all Kuril Island rookeries. The lowest adult (> 3 years old) female survival was found on Medny Island and this may be responsible for the continued population decline there. However, the highest adult survival was found at Kozlov Cape, not in the Kuril Islands where the population is increasing, so we suggest that differences in birth rates might be an important driver of these divergent population trends. High pup survival on the Commander Islands and Kamchatka Coast may be a consequence of less frequent (e.g. biennial) reproduction there, which may permit females that skip birth years to invest more in their offspring, leading to higher pup survival, but this hypothesis awaits measurement of birth rates in these areas. Other/Unknown Material Kamchatka Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
institution |
Open Polar |
collection |
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Altukhov, Alexey V. Andrews, Russel D. Calkins, Donald G. Gelatt, Thomas S. Gurarie, Eliezer D. Loughlin, Thomas R. Mamaev, Evgeny G. Nikulin, Victor S. Permyakov, Peter A. Ryazanov, Sergey D. Vertyankin, Vladimir V. Burkanov, Vladimir N. Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
topic_facet |
Life sciences medicine and health care |
description |
After a dramatic population decline, Steller sea lions have begun to recover throughout most of their range. However, Steller sea lions in the Western Aleutians and Commander Islands are continuing to decline. Comparing survival rates between regions with different population trends may provide insights into the factors driving the dynamics, but published data on vital rates have been extremely scarce, especially in regions where the populations are still declining. Fortunately, an unprecedented dataset of marked Steller sea lions at rookeries in the Russian Far East is available, allowing us to determine age and sex specific survival in sea lions up to 22 years old. We focused on survival rates in three areas in the Russian range with differing population trends: the Commander Islands (Medny Island rookery), Eastern Kamchatka (Kozlov Cape rookery) and the Kuril Islands (four rookeries). Survival rates differed between these three regions, though not necessarily as predicted by population trends. Pup survival was higher where the populations were declining (Medny Island) or not recovering (Kozlov Cape) than in all Kuril Island rookeries. The lowest adult (> 3 years old) female survival was found on Medny Island and this may be responsible for the continued population decline there. However, the highest adult survival was found at Kozlov Cape, not in the Kuril Islands where the population is increasing, so we suggest that differences in birth rates might be an important driver of these divergent population trends. High pup survival on the Commander Islands and Kamchatka Coast may be a consequence of less frequent (e.g. biennial) reproduction there, which may permit females that skip birth years to invest more in their offspring, leading to higher pup survival, but this hypothesis awaits measurement of birth rates in these areas. |
author |
Altukhov, Alexey V. Andrews, Russel D. Calkins, Donald G. Gelatt, Thomas S. Gurarie, Eliezer D. Loughlin, Thomas R. Mamaev, Evgeny G. Nikulin, Victor S. Permyakov, Peter A. Ryazanov, Sergey D. Vertyankin, Vladimir V. Burkanov, Vladimir N. |
author_facet |
Altukhov, Alexey V. Andrews, Russel D. Calkins, Donald G. Gelatt, Thomas S. Gurarie, Eliezer D. Loughlin, Thomas R. Mamaev, Evgeny G. Nikulin, Victor S. Permyakov, Peter A. Ryazanov, Sergey D. Vertyankin, Vladimir V. Burkanov, Vladimir N. |
author_sort |
Altukhov, Alexey V. |
title |
Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
title_short |
Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
title_full |
Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
title_fullStr |
Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
title_full_unstemmed |
Data from: Age specific survival rates of Steller sea lions at rookeries with divergent population trends in the Russian Far East |
title_sort |
data from: age specific survival rates of steller sea lions at rookeries with divergent population trends in the russian far east |
publishDate |
2015 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-ws-gv1l https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:89247 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
doi:10.5061/dryad.885hk/1 doi:10.1371/journal.pone.0127292 PMID:26016772 http://nbn-resolving.org/urn:nbn:nl:ui:13-ws-gv1l doi:10.5061/dryad.885hk https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:89247 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.885hk/110.1371/journal.pone.012729210.5061/dryad.885hk |
_version_ |
1770272487073906688 |