| Population distribution,structure and growth condition of Antarctic krill （Euphausia superba Dana） during the austral summer in the Southern Ocean |
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| 作者姓名： | SHI Yongqiang ;SUN Song ;LI Chaolun ;TAO Zhencheng |
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| 作者单位： | [1]Key Laboratory of Marine Ecology and Environment Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; [2]University of Chinese Academy of Sciences, Beijing 100049, China; [3]Jiaozhou Bay Marine Ecosystem Research Station, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| 基金项目： | Acknowledgments We are grateful to the captain and crew of the R/V XUE LONG icebreaker for their assistance during the cruises. We also thank Zhang Y S and Dr. Wang M X who provided support during our sampling efforts. This study was supported by the Polar Research Strategy Foundation of China，the Chinese Polar Environment ，Comprehensive Investigation &Assessment Programmes |
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| 摘 要： | Antarctic krill （Euphausia superba Dana） was collected using a High Speed Collector and an Isaac-Kidd midwater trawl （IKMT） net during the austral summer of 2007/2008 and 2008/2009 in the circumpolar and Prydz Bay regions of the Southern Ocean, respectively. Combined with the simultaneous recording of environmental factors, spatial distribution, population structure and growth condition of E. superba were studied. The abundance of E. superba in the Weddell Sea was higher than in Prydz Bay. However, the abundance of E. superba in both the Weddell Sea and Prydz Bay was lower than figures reported in previous krill surveys for the same time period. With respect to the total study area, E. superba displayed a normal growing state during the two expeditions. E. superba grew relatively poorly in some stations, which may be due to the late retreat of sea ice or lower chlorophyll a concentrations. The number of juvenile E. superba collected using the High Speed Collector was proportionally greater in stations located at the edge of the sea ice, while adults dominated in long-term non-ice regions. This phenomenon reflects the different distribution pattern between juvenile and adult krill. The population structure of E. superba differed between sea regions, which may affect recruitment.
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| 关 键 词： | 南极磷虾 种群结构 南半球 南大洋 人口分布 生长条件 夏季 普里兹湾 |
Population distribution,structure and growth condition of Antarctic krill (Euphausia superba Dana) during the austral summer in the Southern Ocean |
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| SHI Yongqiang,;SUN Song,;LI Chaolun,;TAO Zhencheng.Population distribution,structure and growth condition of Antarctic krill (Euphausia superba Dana) during the austral summer in the Southern Ocean[J].Chinese Journal of Polar Science,2014(3):183-191. |
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| Authors: | SHI Yongqiang SUN Song LI Chaolun TAO Zhencheng |
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| Institution: | Key Laboratory of Marine Ecology and Environment Sciences, Institute of 0ceanology, Chinese Academy of Sciences, Qingdao 266071, China |
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| Abstract: | Euphausia superba, population distribution, growing state, sea ice, WeddeH Sea, Prydz Bay |
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| Keywords: | Euphausia superba population distribution growing state sea ice Weddell Sea Prydz Bay |
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