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oai:repository.naro.go.jp:02001291 2026-01-30T04:56:08Z 1706970004180:1 87:661:1727312983899:1727312636636:1741912923055

農業水路の生息場評価に向けたタモロコの環境選好性の定式化 Formulation of Preference Intensity of Field Gudgeon to Environmental Factors for Habitat Assessment of Agricultural Canals OKUSHIMA, Shuji 奥島, 修二 オクシマ, シュウジ 田中, 雄一 タナカ, ユウイチ TANAKA, Yuichi KOIZUMI, Noriyuki 小出水, 規行 コイズミ, ノリユキ TAKEMURA, Takeshi 竹村, 武士 タケムラ, タケシ It is essential to give an environmental consideration into industrial or engineering techniques in farm land consolidation for the ecosystem conservation and for understanding the excellent native habitat for fishes around rice fields． However，the accumulation of knowledge on these issues is not enough．The present study aims to formulate preference intensity of field gudgeon with different growth stages of fry and adult by using laboratory open-channel experiments considering the four environmental factors of depth，Velocity，cover and vegetation．We employed the patterns of preference level with modified weighted product equation proposed by Sekine et.al1994）for the formulation． As a result，the present models well represented the preference intensities of the fish in different growth stages．The preference weight of cover factor was found to be high in the fry and that of velocity and vegetation were high in the adult fish．It is suggested that the habitats with cover and vegetation are necessary for the field gudgeon and that lowvelocity is the essential habitat especially for the fry． 独立行政法人 農業・食品産業技術総合研究機構 農村工学研究所 National Agriculture and Food Research Organization, National Institute for Rural Engineering 2007-03-30 jpn departmental bulletin paper https://doi.org/10.24514/0002001291 https://repository.naro.go.jp/records/2001291 10.24514/0002001291 1882-3289 農村工学研究所技報 Technical report of the National Institute for Rural Engineering 206 175 186 https://repository.naro.go.jp/record/2001291/files/TRNIRE206_p175-186.pdf application/pdf 726.1 KB 2025-03-28