Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering
Online ISSN : 1884-7242
Print ISSN : 1882-2789
ISSN-L : 1882-2789
Research Papers
Moving Distance of Nipponocypris sieboldii, the Host Fish Species of Unionid Mussels
Mio KONDOKengo ITOMasateru SENGE
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2012 Volume 80 Issue 6 Pages 515-521

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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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© 2012 The Japanese Society of Irrigation, Drainage and Rural Engineering
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