The Reproductive Success of the Steller Sea Lion Eumetopias jubatus (Schreber, 1776) on Brat Chirpoev and Medny Islands in 2001-2011

Permyakov P. A.; Ryazanov S. D.; Trukhin A. M.; Mamaev E. G.; Burkanov V. N.

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The Reproductive Success of the Steller Sea Lion Eumetopias jubatus (Schreber, 1776) on Brat Chirpoev and Medny Islands in 2001-2011

机译：2001-2011年，斯特勒海狮Eumetopias jubatus（Schreber，1776）在布拉特·奇波耶夫和梅德尼群岛的繁殖成功

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The reproductive success of the Steller sea lion was estimated based on monitoring the breeding performance of known-age branded females on Brat Chirpoev and Medny islands in 2001-2011. First pup birth occurred at 4 years of age, but the majority of females gave birth to their first pup at the age of 5 years on both islands. The period of the highest realization of female initial reproductive capacity on Medny Island was 4-5 years shorter compared to Brat Chirpoev Island. The differences were caused by a lower number of middle-aged females and a higher proportion of non-pregnant females on Medny Island. The low reproductive success of females is probably the main reason for the depression of the Steller sea lion population on Medny Island.

机译：斯特勒海狮的繁殖成功是根据2001-2011年在布拉特·奇波耶夫（Brat Chirpoev）和梅德尼（Medny）岛上监测已知年龄的雌性雌性繁殖性能估算的。首次幼崽的出生年龄为4岁，但在两个岛屿上，大多数雌性都在5岁时首次生下幼崽。与布拉特·奇尔波夫岛相比，梅德尼岛女性实现最高初始生殖能力的时期短了4-5年。造成这种差异的原因是，梅德尼岛上的中年女性人数较少，非怀孕女性人数比例较高。雌性繁殖能力差可能是梅德尼岛斯特勒海狮种群减少的主要原因。

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来源
《Russian journal of marine biology》 |2014年第6期|440-446|共7页
作者
Permyakov P. A.; Ryazanov S. D.; Trukhin A. M.; Mamaev E. G.; Burkanov V. N.;
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作者单位

Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok 690041, Russia;

Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok 690041, Russia|Russian Acad Sci, Pacific Inst Geog, Kamchatka Branch, Far Eastern Branch, Petropavlovsk Kamchatski 683083, Russia;

Russian Acad Sci, Ilichev Pacific Oceanol Inst, Far Eastern Branch, Vladivostok 690041, Russia;

Komandorsky State Nat Biosphere Reserve, Nikolskoye 684500, Russia;

Russian Acad Sci, Pacific Inst Geog, Kamchatka Branch, Far Eastern Branch, Petropavlovsk Kamchatski 683083, Russia|NOAA, Natl Marine Mammal Lab, AFSC, NMFS, Seattle, WA 98115 USA;

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正文语种 eng
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关键词
Steller sea lion; Commander Islands; Kuril Islands; reproductive success;

机译：斯特勒海狮;司令群岛;库里尔群岛;生殖成功;

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The Reproductive Success of the Steller Sea Lion Eumetopias jubatus (Schreber, 1776) on Brat Chirpoev and Medny Islands in 2001-2011

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