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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ftzenodo:oai:zenodo.org:4962053 2024-09-09T19:49:23+00:00 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. 2016-04-30 https://doi.org/10.5061/dryad.885hk unknown Zenodo https://doi.org/10.1371/journal.pone.0127292 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.885hk oai:zenodo.org:4962053 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode vital rates western stock Steller sea lion Eumetopias jubatus info:eu-repo/semantics/other 2016 ftzenodo https://doi.org/10.5061/dryad.885hk10.1371/journal.pone.0127292 2024-07-25T12:33:40Z 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. Resight history of Steller sea lions in the Russian Far East Data file contains annual resight history of Steller sea lions branded as pups between 1989 and 2008 and resighted ... Other/Unknown Material Kamchatka Zenodo |
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vital rates western stock Steller sea lion Eumetopias jubatus |
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vital rates western stock Steller sea lion Eumetopias jubatus 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 |
vital rates western stock Steller sea lion Eumetopias jubatus |
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. Resight history of Steller sea lions in the Russian Far East Data file contains annual resight history of Steller sea lions branded as pups between 1989 and 2008 and resighted ... |
format |
Other/Unknown Material |
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 |
publisher |
Zenodo |
publishDate |
2016 |
url |
https://doi.org/10.5061/dryad.885hk |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
https://doi.org/10.1371/journal.pone.0127292 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.885hk oai:zenodo.org:4962053 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.885hk10.1371/journal.pone.0127292 |
_version_ |
1809918781881843712 |