粘菌の行動パターン形成のシミュレーション

概要

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In order to make a model of pattern formation for food, we investigated the basic parameters of formation in the plasmodium Physarum polycephalum. This paper presents simulation algorithm of the pattern formation of plasmodium for food. A plasmodium was isolated in the oatmeal agar culture. It changes the shape as it crawls over a plain agar gel culture and, if oatmeal is place at one point, it will put out pseudopodia to the oatmeal source. The number, length of the branch and shape of the pseudopodium were different in distance between plasmodium and food. Initially plasmodium positioned on the agar was spread at non-direction. After that, it spread the branches of pseudopodium for food. After its branch reaches to the food, all branches and stem of plasmodium moved to the same direction for food. Our program which have three algorithms of the selection of the direction for food, distance selection and of the angle selection, needed 2 B (int type), 8 B (double type) parameters, 26 B for a branch and about 100 kB for memories. It is confirmed that simulation program with 11 parameters shows basic features in the shape of the plasmodium pseudopodia for food. These parameters, however, are not enough to present the stem moving of plasmodium after branch reaching to food.
帝京平成大学の論文
2001-12-25