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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fttriple:oai:gotriple.eu:50|dedup_wf_001::c6de762130ec720c181670a956e0f169 2023-05-15T16:58:57+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. 2015-01-01 https://doi.org/10.5061/dryad.885hk undefined unknown http://dx.doi.org/10.5061/dryad.885hk https://dx.doi.org/10.5061/dryad.885hk lic_creative-commons oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:89247 oai:easy.dans.knaw.nl:easy-dataset:89247 10.5061/dryad.885hk 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c Life sciences medicine and health care Steller sea lion Survival vital rates mark-recapture western stock Commander Islands Eastern Kamchatka Kuril Islands Eumetopias jubatus archeo demo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2015 fttriple https://doi.org/10.5061/dryad.885hk 2023-01-22T16:51:19Z 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 EastData file contains annual resight history of Steller sea lions branded as pups between 1989 and 2008 and resighted between ... Dataset Kamchatka Unknown |
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Open Polar |
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Unknown |
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fttriple |
language |
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topic |
Life sciences medicine and health care Steller sea lion Survival vital rates mark-recapture western stock Commander Islands Eastern Kamchatka Kuril Islands Eumetopias jubatus archeo demo |
spellingShingle |
Life sciences medicine and health care Steller sea lion Survival vital rates mark-recapture western stock Commander Islands Eastern Kamchatka Kuril Islands Eumetopias jubatus archeo demo 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 Steller sea lion Survival vital rates mark-recapture western stock Commander Islands Eastern Kamchatka Kuril Islands Eumetopias jubatus archeo demo |
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 EastData file contains annual resight history of Steller sea lions branded as pups between 1989 and 2008 and resighted between ... |
format |
Dataset |
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 |
https://doi.org/10.5061/dryad.885hk |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
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op_relation |
http://dx.doi.org/10.5061/dryad.885hk https://dx.doi.org/10.5061/dryad.885hk |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.885hk |
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1766051086306639872 |