globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0127292
论文题名:
Age Specific Survival Rates of Steller Sea Lions at Rookeries with Divergent Population Trends in the Russian Far East
作者: Alexey V. Altukhov; Russel D. Andrews; Donald G. Calkins; Thomas S. Gelatt; Eliezer D. Gurarie; Thomas R. Loughlin; Evgeny G. Mamaev; Victor S. Nikulin; Peter A. Permyakov; Sergey D. Ryazanov; Vladimir V. Vertyankin; Vladimir N. Burkanov
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-5-27
卷: 10, 期:5
语种: 英语
英文关键词: Sea lions ; Age groups ; Gulf of Alaska ; Russia ; Predation ; Population dynamics ; Alaska ; Birth rates
英文摘要: 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.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0127292&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/21952
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: University of Alaska Fairbanks, Fairbanks, Alaska, USA;Kamchatka Branch of the Pacific Geographical Institute FEB RAS, Petropavlovsk-Kamchatsky, Kamchatsky Kray, Russia;University of Alaska Fairbanks, Fairbanks, Alaska, USA;Alaska SeaLife Center, Seward, Alaska, USA;North Pacific Wildlife Consulting LLC, Anchorage, Alaska, USA;National Marine Mammal Laboratory (AFSC, NMFS, NOAA), Seattle, Washington, USA;Department of Biology, University of Maryland, College Park, Maryland, USA;School of Environmental and Forest Sciences, University of Washington, Seattle, Washington, USA;TRL Wildlife Consulting (NMML retired), Seattle, Washington, USA;State Nature Reserve “Komandorsky”, Nikolskoe, Kamchatsky Kray, Russia;Kamchatka Research Institute of Fisheries and Oceanography, Petropavlovsk-Kamchatsky, Kamchatsky Kray, Russia;V.I.Il‘ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Primorsky Kray, Russia;Kamchatka Branch of the Pacific Geographical Institute FEB RAS, Petropavlovsk-Kamchatsky, Kamchatsky Kray, Russia;V.I.Il‘ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Primorsky Kray, Russia;Kronotsky Reserve, Yelizovo, Kamchatsky Kray, Russia;Kamchatka Branch of the Pacific Geographical Institute FEB RAS, Petropavlovsk-Kamchatsky, Kamchatsky Kray, Russia;North Pacific Wildlife Consulting LLC, Anchorage, Alaska, USA;National Marine Mammal Laboratory (AFSC, NMFS, NOAA), Seattle, Washington, USA

Recommended Citation:
Alexey V. Altukhov,Russel D. Andrews,Donald G. Calkins,et al. Age Specific Survival Rates of Steller Sea Lions at Rookeries with Divergent Population Trends in the Russian Far East[J]. PLOS ONE,2015-01-01,10(5)
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