New records of nonnative signal crayfish <i>Pacifastacus leniusculus</i> in Nagano Prefecture with implications for multiple translocation pathways

DOI

Bibliographic Information

Other Title
  • 長野県における特定外来生物シグナルザリガニの新産地および移入起源推定

Abstract

<p>The North American signal crayfish Pacifastacus leniusculus was newly found in six waterbodies of Nagano Prefecture, central Japan, from 2011 to 2020. The waterbodies with new introductions included reservoirs, farm ponds and low-gradient streams within the altitude range of 670 - 1300 m. Analyses of ectosymbiotic branchiobdellidan (Annelida: Clitellata) species composition and mitochondrial DNA sequences of the crayfish suggest that the new invasions arose due to translocation via multiple pathways from inside and outside of Nagano Prefecture. Efforts to eradicate the newly established signal crayfish populations should be undertaken. At the same time, further efforts to stop illegal stocking are needed to prevent range expansions of signal crayfish.</p>

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Keywords

Details 詳細情報について

  • CRID
    1390292561165887488
  • DOI
    10.18960/hozen.2126
  • ISSN
    24241431
    13424327
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Allowed

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