Aphid-attending Ants Increase the Number of Emerging Adults of the Aphid's Primary Parasitoid and Hyperparasitoids by Repelling Intraguild Predators(Behavior and Ecology)

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抄録

The impact of the ant Lasius niger attending the cotton aphid, Aphis gossypii, on the number of emerging adults of this aphid's primary parasitoid, Lysiphlebus japonicus, and its hyperparasitoids in the presence of predators was assessed experimentally at a no-pesticide mandarin grove. Aphid colonies were artificially initiated on young citrus shoots in spring. Attending ants drove away large predators, such as the coccinellid Harmonia axyridis, from aphid colonies through aggressive behavior, so that the aphid numbers were consistently greater in ant-attended colonies than in colonies where ants were excluded using tanglefoot. L. japonicus females were observed foraging more frequently in ant-attended colonies. They were often attacked by ants, but oviposited successfully by avoiding encounters with approaching ants. In ant-excluded colonies, L. japonicus parasitized a small number of aphids, with most of them being subject to intraguild predation. Ants disregarded parasitized aphids, thereby incidentally protecting them against large predators. Consequently, L. japonicus-mummies were abundant in ant-attended colonies, but scarce in ant-excluded ones. In addition, significantly more adults of both L. japonicus and hyperparasitoids emerged in ant-attended colonies. The larvae of a small coccinellid, Scymnus posticalis, foraged in ant-attended colonies, but were ignored by ants. The number of mummies in ant-attended colonies was reduced when S. posticalis larvae were abundant, but the difference was insignificant. Ant-exclusion after mummy formation revealed that ants reduced intraguild predation and hyperparasitism on immature L. japonicus within mummies. Thus, L. niger attending A. gossypii increases the number of emerging adults of this aphid's primary parasitoid and hyperparasitoids by repelling large predators, although ants do disturb ovipositing parasitoids.

収録刊行物

  • Entomological science

    Entomological science 5(2), 131-146, 2002-06-25

    Entomological Society of Japan

参考文献:  47件中 1-47件 を表示

被引用文献:  9件中 1-9件 を表示

各種コード

  • NII論文ID(NAID)
    110007339527
  • NII書誌ID(NCID)
    AA11217633
  • 本文言語コード
    ENG
  • 資料種別
    Journal Article
  • ISSN
    13438786
  • NDL 記事登録ID
    6212495
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z54-J320
  • データ提供元
    CJP書誌  CJP引用  NDL  NII-ELS  IR 
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