Artificial burrow sizes for capturing the North American invasive crayfish <i>Procambarus clarkii</i>.

  • USHIMI Haruna
    Graduate School of Environmental and Life Science, Okayama University
  • MIYATAKE Yuta
    Graduate School of Environmental and Life Science, Okayama University
  • TSUTSUI Naoaki
    Ushimado Marine Institute, Faculty of Science, Okayama University
  • SAKAMOTO Tatsuya
    Ushimado Marine Institute, Faculty of Science, Okayama University
  • NAKATA Kazuyoshi
    Graduate School of Environmental and Life Science, Okayama University

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  • 外来種アメリカザリガニの駆除に用いる人工巣穴サイズ
  • ガイライシュ アメリカザリガニ ノ クジョ ニ モチイル ジンコウ スアナ サイズ

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Abstract

We conducted aquarium experiments of artificial burrow preference by the North American invasive crayfish Procambarus clarkii to clarify the artificial burrow sizes for capturing P. clarkii in invaded freshwater areas (e.g., paddy fields, agricultural channels, rivers, lakes, ponds, etc.). In the aquarium experiments, we observed the preference for internal diameters and lengths of artificial burrows by P. clarkii, which were made from straight polyvinyl chloride pipes. The relationship between the total length (TL)(X, mm) of P. clarkii and the preferred internal diameter (Y, mm) of artificial burrows was described by the significant linear regression: Y=0.58X+4.26( n=49, P<0.001). Among the artificial burrows of different lengths, TL×4 burrows were mainly preferred by P. clarkii. Based on these results, we propose artificial burrow sizes for use to eradicate P. clarkii.

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