Geographic variation in adult body size and voltinism in the kleptoparasitic spider, Argyrodes kumadai (Araneae: Theridiidae)

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  • Baba Yuki G.
    Laboratory of Biodiversity Science, School of Agriculture and Life Sciences, The University of Tokyo
  • Miyashita Tadashi
    Laboratory of Biodiversity Science, School of Agriculture and Life Sciences, The University of Tokyo

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Other Title
  • 盗み寄生者チリイソウロウグモにおける成体サイズと生活環の地理的変異
  • ヌスミ キセイシャ チリイソウロウグモ ニ オケル セイタイ サイズ ト セイカツカン ノ チリテキ ヘンイ

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Abstract

This study examined geographic variation of adult body size and voltinism in the kleptoparasitic spider Argyrodes kumadai in three regions (Boso peninsula in Japan mainland, Amami-oshima Island, and Okinawa Islands) to see how climatic conditions and host use affect life history of this spider. Adult body size differed significantly between populations; Amami-oshima population was larger than the other populations. Voltinism also differed between populations; Boso population was univoltine, Amami-oshima population was probably univoltine with partial bivoltine, Okinawa population seemed to be bivoltine or multi-voltine. The variation of body size appeared to have been created by the combination of the differences in developmental period, food availability in different hosts, and voltinism.

Journal

  • Acta Arachnologica

    Acta Arachnologica 57 (1), 51-54, 2008

    Arachnological Society of Japan

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