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首页> 外文期刊>Polar biology >Lipid characterization of Pleuragramma antarcticum(Nothoteniidae) larvae off East Antarctica (139°E-145.10°E)during summer
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Lipid characterization of Pleuragramma antarcticum(Nothoteniidae) larvae off East Antarctica (139°E-145.10°E)during summer

机译：夏季南极东部（139°E-145.10°E）南极侧耳蝠le幼虫的脂质特征

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摘要

Pleuragramma antarcticum (Antarctic silver-fish) larvae are a key component of the neritic assemblages in the Antarctic coastal waters and can be considered as an indicator of the future changes that may occur in this area. Lipid class and fatty acid composition was studied to assess the nutritional status and evaluate the type of dominant trophic interactions of P. antarcticum larvae collected between Terre Adelie and the Mertz Glacier Tongue (139°E-145.10°E) during summer 2007. P. antarcticum larvae exhibit moderate lipid levels (11.9-15.0% dry weight). Lipid class analyses showed a similar pattern over the study area consisting mainly of polar lipids (61-75% of total lipids). During their first summer, larvae started to accumulate small amount of lipid reserves in the form of triacylglycerols (10-16% of total lipids). Polar lipids were dominated by phosphatidylcholine (55-59%) followed by phosphatidylethanolamine (19-21%). Fatty acid signature of triacylglycerols indicates (1) a dominance of copepod of the Oithona type in the trophic pattern of P. antarcticum larvae and (2) a significant contribution of phytoplankton. In the same way, the analysis of gut content shows that 70% of larvae fed on various assemblages of phytoplankton and zooplankton (mainly copepods) and 30% of larvae fed exclusively on phytoplankton. Although a carnivorous diet is commonly described, our results suggest that P. ant-arcticum larvae showed an opportunistic feeding strategy (i.e. high degree of omnivory) and that dietary energy seems to be mainly directed towards fast growth rather than energy storage for periods of starvation.
机译：南极珍宝鱼（南极银鱼）的幼虫是南极沿海水域中鱼群的重要组成部分，可以被视为该地区未来变化的指示。研究了类脂和脂肪酸组成，以评估2007年夏季在Terre Adelie和Mertz冰川舌头（139°E-145.10°E）之间收集的南极疟原虫幼虫的营养状况和主要营养相互作用的类型。南极幼虫的脂质水平中等（干重为11.9-15.0％）。脂类分析在整个研究领域显示出相似的模式，主要由极性脂质组成（占总脂质的61-75％）。在他们的第一个夏天，幼虫开始以三酰甘油的形式积累少量的脂质储备（占总脂质的10-16％）。极性脂质的主要成分是磷脂酰胆碱（55-59％），其次是磷脂酰乙醇胺（19-21％）。三酰基甘油的脂肪酸特征表明：（1）在南极疟原虫幼虫的营养模式中，Oithona型co足类占主导地位；（2）浮游植物的重要贡献。同样，对肠道含量的分析表明，以各种浮游植物和浮游动物（主要是co足类）为食的幼虫占70％，仅以浮游植物为食的幼体占30％。尽管通常描述肉食性饮食，但我们的结果表明，P。ant-arcticum幼虫表现出机会性的喂养策略（即高度杂食），并且饮食能量似乎主要用于快速生长，而不是饥饿期间的能量存储。

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  • 来源
    《Polar biology》 |2012年第6期|p.829-840|共12页
  • 作者

    Eric Tavernier; Patrick Mayzaud; Marc Boutoute; Carole Vallet; Philippe Koubbi;

  • 作者单位

    Univ Lille Nord de France, 59000 Lille, France,Departement Genie Biologique, ULCO, BP 120,62327 Boulogne sur Mer, France;

    Laboratoire d'Oceanographie de Villefranche,UMR 7093 CNRS, Universite Pierre et Marie Curie-Paris 6,BP 28, 06234 Villefranche-sur-Mer, France;

    Laboratoire d'Oceanographie de Villefranche,UMR 7093 CNRS, Universite Pierre et Marie Curie-Paris 6,BP 28, 06234 Villefranche-sur-Mer, France;

    Univ Lille Nord de France, 59000 Lille, France,Laboratoire d'Oceanologie et de Geosciences,UMR 8187, Universite du Littoral Cote d'Opale,62930 Wimereux, France Universite d'Artois, IUFM Nord-Pas de Calais,Centre d'Outreau, 62230 Outreau, France;

    Laboratoire d'Oceanographie de Villefranche,UMR 7093 CNRS, Universite Pierre et Marie Curie-Paris 6,BP 28, 06234 Villefranche-sur-Mer, France;

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  • 关键词

    pleuragramma antarcticum; larvae; lipid composition; fatty acid markers; nutritional status; antarctic;

    机译：南极胸膜;幼虫脂质成分脂肪酸标记营养状况;南极;

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