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Stomach stones in king penguin chicks

机译：企鹅王小鸡的胃结石

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摘要

Many animals that possess a gizzard swallow stones or sandy grit, supposedly to aid in the mechanical breakdown of food. While this has been well documented in the literature, our study is the first to report the presence of stones in the gizzard of king penguin chicks. We found stones, so called 'gastroliths', in the pyloric region of the gizzard, the part of the digestive tract that is specialised for the mechanical breakdown of food. Stones were already present in the gizzard of chicks and, hence, during the first year of the life of king penguins, which is spent on land. Some chicks were found to have more than 130 stones (0.5-22 mm in size) in their gizzard. The gastroliths we found in king penguins are of the same geological origin as rocks present at the colony, which suggests that birds swallowed them there. The functional role of gastroliths in penguin chicks and adults is still unknown. We discuss the potential roles that these gastroliths might play in kingrnpenguins (i.e. aid in digestion, buoyancy control during foraging at sea, adaptation to fasting).
机译：许多拥有的动物会吞下石块或沙粒，据认为有助于食物的机械分解。尽管这已经在文献中得到了很好的记录，但我们的研究是第一个报道金企鹅幼鸟的izz中存在结石的研究。我们在the的幽门区域发现了所谓的“胃石”，这是消化道中专门用于食品机械分解的部分。小鸡的izz中已经有石头，因此，在土地上度过的帝王企鹅生命的第一年中。发现一些小鸡的g中有130多块石头（大小为0.5-22毫米）。我们在帝王企鹅中发现的胃石与该殖民地存在的岩石具有相同的地质起源，这表明鸟类在那里吞噬了它们。胃石在企鹅雏鸡和成年鸡中的功能作用仍然未知。我们讨论了这些胃石可能在金企鹅中扮演的潜在角色（即帮助消化，在海上觅食时控制浮力，适应禁食）。

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  • 来源
    《Polar biology》 |2009年第4期|593-597|共5页
  • 作者

    David Beaune; Celine Le Bohec; Fabrice Lucas; Michel Gauthier-Clerc; Yvon Le Maho;

  • 作者单位

    Departement d'Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scicntifique. UMR 7178, 23 rue Becquerel, 67087 Strasbourg Cedex 02, France;

    Departement d'Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scicntifique. UMR 7178, 23 rue Becquerel, 67087 Strasbourg Cedex 02, France Department of Biology, Centre for Ecological and Evolutionary Synthesis (CEES), University of Oslo, PO Box 1066, 0316 Blindern, Norway;

    Ecole et Observatoire des Sciences de la Terre, 5 rue Rene Descartes, 67084 Strasbourg, France;

    Centre de Recherche de la Tour du Valat, Le Sambuc, 13200 Aries, France;

    Departement d'Ecologie, Physiologie et Ethologie, Institut Pluridisciplinaire Hubert Curien (IPHC), Centre National de la Recherche Scicntifique. UMR 7178, 23 rue Becquerel, 67087 Strasbourg Cedex 02, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gastrolith; grit; seabird; digestion; adaptive behaviour;

    机译：胃石砂砾;海鸟消化;适应行为;

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