Ontogenic changes in the feeding ecology of the early life stages of the Antarctic silverfish (Pleuragramma antarcticum) documented by stable isotopes and diet analysis in the Dumont d'Urville Sea (East Antarctica)

  • Giraldo Carolina
    UPMC Universite Paris 06, UMR 7093, Laboratoire d'Oceanographie de Villefranche, BP28, 06234 Villefranche-sur-Mer, France
  • Cherel Yves
    Centre d'Etudes Biologiques de Chize, UPR 1934 du CNRS, BP 14, 79360 Villiers-en-Bois, France
  • Vallet Carole
    Laboratoire d'Oceanologie et de Geosciences, UMR 8187, Universite du Littoral Cote d'Opale, 32 avenue Foch, 62930 Wimereux, France
  • Mayzaud Patrick
    UPMC Universite Paris 06, UMR 7093, Laboratoire d'Oceanographie de Villefranche, BP28, 06234 Villefranche-sur-Mer, France
  • Tavernier Eric
    Universite Lille Nord de France, F-59000 Lille, France
  • Moteki Masato
    Faculty of Marine Science, Tokyo University of Marine Sciences and Technology, 4-5-7 Konan, Minato, Tokyo 108-8477, Japan
  • Hosie Graham
    Australian Antarctic Division, Department of Sustainability, Environment, Water, Population and Communities, 203 Channel Highway, Kingston, Tasmania 7050, Austra
  • Koubbi Philippe
    UPMC Universite Paris 06, UMR 7093, Laboratoire d'Oceanographie de Villefranche, BP28, 06234 Villefranche-sur-Mer, France

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説明

The feeding ecology of the notothenioid fish Pleuragramma antarcticum was studied in the Dumont d'Urville Sea (East Antarctica) near the French Antarctic station. Stable isotopes (δ13C and δ15N) and diet contents were used in order to study dietary shifts between fish larvae and juveniles. All specimens had low δ13C values (<−24‰), a main characteristic of high-Antarctic pelagic species. Fish larvae showed differences in both carbon and nitrogen ratios when compared with juveniles. Muscle δ15N values showed a difference of one trophic level ( 3‰) between larvae (6.7‰) and juveniles (9.7–10.0‰) and a trophic position of tertiary consumers. Diet content analyses (stereomicroscope and scanning electron microscopes) indicated that larvae are omnivorous, feeding on phytoplankton (mainly diatoms) as well as on zooplankton species. A positive relationship between δ15N values and size was found and indicated a carnivorous diet for older specimens.

収録刊行物

  • Polar science

    Polar science 5 (2), 252-263, 2011-08

    国立極地研究所

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詳細情報 詳細情報について

  • CRID
    1573105976874038272
  • NII論文ID
    110008608352
  • NII書誌ID
    AA12240481
  • ISSN
    18739652
  • 本文言語コード
    en
  • データソース種別
    • CiNii Articles

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