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      Spatial difference in genetic variation for fenitrothion tolerance between local populations of Daphnia galeata in Lake Kasumigaura, Japan.

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          Abstract

          This study examines the spatial difference in genetic variation for tolerance to a pesticide, fenitrothion, in Daphnia galeata at field sites in Lake Kasumigaura, Japan. We estimated genetic values of isofemale lines established from dormant eggs of D. galeata collected from field sampling sites with the toxicant threshold model applied using acute toxicity. We compared genetic values and variances and broad-sense heritability across different sites in the lake. Results showed that the mean tolerance values to fenitrothion did not differ spatially. The variance in genetic value and heritability of fenitrothion tolerance significantly differed between sampling sites, revealing that long-term ecological risk of fenitrothion may differ between local populations in the lake. These results have implications for aquatic toxicology research, suggesting that differences in genetic variation of tolerance to a chemical among local populations must be considered for understanding the long-term ecological risks of the chemical over a large geographic area.

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          Author and article information

          Journal
          Ecotoxicology
          Ecotoxicology (London, England)
          Springer Science and Business Media LLC
          1573-3017
          0963-9292
          Dec 2017
          : 26
          : 10
          Affiliations
          [1 ] Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, 305-8506, Japan. hiroyuki.mano.pwri@gmail.com.
          [2 ] Water Environmental Research Group, Public Works Research Institute, Minamihara 1-6, Tsukuba, 305-8516, Japan. hiroyuki.mano.pwri@gmail.com.
          [3 ] Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, 305-8506, Japan.
          [4 ] Graduate School of Global Environmental Studies, Sophia University, Kioicho 7-1, Chiyoda-ku, 120-8554, Japan.
          Article
          10.1007/s10646-017-1860-x
          10.1007/s10646-017-1860-x
          28951989

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