Abstract
In this case study in mountainous area, Ryujin-mura, Wakayama Prefecture, invading path of wild boar from forest into a unit of paddy fields is researched by the tracks of wild boar, as well as land-use situation by each lot.
As a result of total analysis, features of the invading path related to the land-use situation and the spatial structure of paddy field are pointed out as followed:
1) Under the Rice Production Adjustment System (Seisan-chosei of rice), much of paddy field located parallel to the ravine has been converted into forest. That field has been not managed properly, resulting in forming the wider ravine buffer. It means, converted paddy field into forest has become a corridor of wild boar to invade into a unit of paddy field.
2) Soil ridges between rice fields are much more used than stone one by wild boar as the invading path. It is able for wild boar to climb over about 2m soil ridge. Wild boar tends to pass the same point continuously.
