Abstract
The purpose of this study is to clarify the mutual relationships between the Yatoda environmental factors and the Luciola lateralis population. This research was conducted in a hilly land located at Nobi district in the Miura Peninsula. It was found that Yatoda used as paddy field have given close relationships between the human impacts and L. lateralis population density. Multiple regression analysis indicates a significant relationships between the population density of L. lateralis and the environmental factors. The factors that influenced the population density at Yato having narrow and steep geographical features are relative light intensity on the irrigation canal, depth of stream, height of the open space between the stream surface and the river bank line, width of irrigation canal, minimum flow velocity, soil moisture and length of plot. While the factors that influenced the population density at Yato having wide geographical features are relative light intensity on the irrigation canal, depth of stream, height of the open space between the stream surface and the river bank line, width of irrigation canal, ratio of the width of irrigation canal to the width of stream, flow velocity change, width of plot.
