Moving Distance of <i>Nipponocypris sieboldii</i>, the Host Fish Species of Unionid Mussels

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  • KONDO Mio
    Graduate School of Applied Biological Sciences, Gifu University
  • ITO Kengo
    Faculty of Applied Biological Science, Gifu University
  • SENGE Masateru
    Faculty of Applied Biological Science, Gifu University

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Other Title
  • イシガイ科二枚貝の宿主ヌマムツ<i>Nipponocypris sieboldii</i>の移動距離
  • イシガイ科二枚貝の宿主ヌマムツNipponocypris sieboldiiの移動距離
  • イシガイカ ニマイガイ ノ シュクシュ ヌマムツ Nipponocypris sieboldii ノ イドウ キョリ

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Abstract

Unionid mussels have very low mobility. Therefore, expansion of their habitat and gene flow between their local habitats are dependent on movement of their host fishes. In this study, moving distance of Nipponocypris sieboldii, which is host fish species of unionid mussels, was investigated in Kudase River and a drainage canal of the paddy fields in Gifu Prefecture. Moving distance of N. sieboldii is described by the formula: y=exp(6.50+0.06x). Explanatory variable is days until recapture. If the duration of glochidial infection is 7days, moving distance of N. sieboldii estimated by this formula is 1,040m. Therefore, in this investigation area, if the local habitats of Unionidae are located within about 1,000m, it will be effective for the expansion of habitat and the gene flow between local habitats.

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