Changes of Fish Biota by Construction of Environment-Conscious Canals in Lowland Paddy Area

  • Mori Sumiko
    The United Graduate School of Agricultural Science, 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
  • 低平水田地帯における環境配慮型水路の施工による魚類相の変化
  • テイヘイスイデン チタイ ニ オケル カンキョウ ハイリョガタ スイロ ノ セコウ ニ ヨル ギョルイソウ ノ ヘンカ

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Abstract

The investigation was carried out for two years, to clarify which types of environment-conscious canals are suitable for freshwater fish habitation as an alternative environment for disappearing wetlands. It was found that freshwater fishes could inhabit the environment-conscious canals if vegetation zones are created at the water edges. Moreover, it was found that demersal fishes needed to be moved artificially because they could not move by themselves from the disappearing wetlands to the environment-conscious canals. However, the environment in the agricultural drainage canal changed drastically due to the significant changes in water depth; therefore the canal could not provide a stable habitat for freshwater fishes.

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