FUNCTIONAL EVALUATION AS HABITAT OF THE FLOODPLAIN-DEPENDENT FISH SPECIES BY THE CATEGORICAL WATERBODIES AT THE KIKUCHI RIVER

Abstract

 The floodplain-dependent fish species such as Bitterling subfamily Acheilognathinae are decreasing at the Kikuchi river. Accordingly, it has been required taking countermeasure for the preservation of these fish. In this study, in order to obtain the knowledge for the floodplain-dependent fish species, classified waterbodies and evaluated each of the function as habitat of the floodplain-dependent fish. As a result, many floodplain-dependent fish spices were confirmed in the floodponds on the fixed sandbar and large waterbodies on the fixed sandbar. Especially, it was suggested that waterbodies on the fixed sandbar is important for the conservation of the three species (Acheilognathinae, Oryzias latipes, Abbottina rivularis). On the other hand, waterbodies on the sandbar were functioning as habitat of fry of the Zacco platypus, Zacco temminckii.