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首页> 外文期刊>Polar biology >Under-ice distribution of polar cod Boreogadus saida in the central Arctic Ocean and their association with sea-ice habitat properties
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Under-ice distribution of polar cod Boreogadus saida in the central Arctic Ocean and their association with sea-ice habitat properties

机译：北极中部极地鳕鳕的冰eo分布及其与海冰栖息地特性的关系

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摘要

In the Arctic Ocean, sea-ice habitats are undergoing rapid environmental change. Polar cod (Boreogadus saida) is the most abundant fish known to reside under the pack-ice. The under-ice distribution, association with sea-ice habitat properties and origins of polar cod in the central Arctic Ocean, however, are largely unknown. During the RV Polarstern expedition ARK XXVII/3 in the Eurasian Basin in 2012, we used for the first time in Arctic waters a Surface and Under Ice Trawl with an integrated bio-environmental sensor array. Polar cod was ubiquitous throughout the Eurasian Basin with a median abundance of 5000 ind. km(-2). The under-ice population consisted of young specimens with a total length between 52 and 140 mm, dominated by 1-year-old fish. Higher fish abundance was associated with thicker ice, higher ice coverage and lower surface salinity, or with higher densities of the ice-amphipod Apherusa glacialis. The fish were in good condition and well fed according to various indices. Back-tracking of the sea-ice indicated that sea-ice sampled in the Amundsen Basin originated from the Laptev Sea coast, while sea-ice sampled in the Nansen Basin originated from the Kara Sea. Assuming that fish were following the ice drift, this suggests that under-ice polar cod distribution in the Eurasian Basin is dependent on the coastal populations where the sea-ice originates. The omnipresence of polar cod in the Eurasian Basin, in a good body condition, suggests that the central Arctic under-ice habitats may constitute a favourable environment for this species survival, a potential vector of genetic exchange and a recruitment source for coastal populations around the Arctic Ocean.
机译：在北冰洋，海冰栖息地正在经历快速的环境变化。极地鳕鱼（Boreogadus saida）是已知居住在the冰下的最丰富的鱼类。然而，在北冰洋中部，冰下分布，与海冰栖息地的特性以及极地鳕鱼的起源有关。在2012年欧亚盆地的RV Polarstern探险队ARK XXVII / 3中，我们首次在北极水域中使用了集成了生物环境传感器阵列的“地表和冰拖网”。极地鳕鱼在整个欧亚盆地普遍存在，中位数为5000 ind。 km（-2）。冰下种群由年轻标本组成，总长在52至140毫米之间，以1岁大的鱼类为主。鱼的丰度越高，冰就越厚，冰的覆盖率越高，地表盐度越低，或者说冰两栖动物Apherusa glacialis的密度越高。这些鱼状况良好，并根据各种指标进行了良好的喂养。海冰的回溯表明，在阿蒙森盆地采样的海冰起源于拉普捷夫海沿岸，而在南森盆地采样的海冰则起源于卡拉海。假设鱼跟随冰漂，这表明欧亚盆地中冰下极鳕鱼的分布取决于海冰起源的沿海种群。欧亚大陆鳕鱼无处不在，身体状况良好，这说明北极中部冰下生境可能为该物种的生存提供了有利的环境，成为了潜在的遗传交流载体，并为该地区周围的沿海种群提供了征募来源。北冰洋。

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  • 来源
    《Polar biology》 |2016年第6期|981-994|共14页
  • 作者

    David Carmen; Lange Benjamin; Krumpen Thomas; Schaafsma Fokje; van Franeker Jan Andries; Flores Hauke;

  • 作者单位

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany|Univ Hamburg, Ctr Nat Hist CeNak, Zool Museum, Martin Luther King Pl 3, D-20146 Hamburg, Germany;

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany|Univ Hamburg, Ctr Nat Hist CeNak, Zool Museum, Martin Luther King Pl 3, D-20146 Hamburg, Germany;

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany;

    IMARES Wageningen UR, POB 167, NL-1790 AD Den Burg, Texel, Netherlands;

    IMARES Wageningen UR, POB 167, NL-1790 AD Den Burg, Texel, Netherlands;

    Helmholtz Zentrum Polar & Meeresforsch, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany|Univ Hamburg, Ctr Nat Hist CeNak, Zool Museum, Martin Luther King Pl 3, D-20146 Hamburg, Germany;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Polar cod; Under-ice habitats; Ice drift; Sea-ice properties; Apherusa glacialis; GLM;

    机译：极鳕鱼;冰下栖息地;冰漂移;海冰特性;冰单球菌;GLM;

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