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Effects of amount of food on path selection in the transport network of an amoeboid organsim 中垣, 俊之 83 70300887 Saigusa, Tetsu 7543 Tero, Atsushi 7544 Kobayashi, Ryo 7545 We studied the effect of the size of food sources (FSs) presented to the true slime mould Physarum polycephalum on the tubular networks formed by the organism to absorb nutrient. The amount of plasmodium gathering at an FS was shown to be proportional to both the concentration of nutrient and the surface area of the FS. We presented two FSs to test which connection the organism selected in response to varying amounts of food and derived a simple rule for connection persistence: the longer connection collapses earlier. A mathematical model for tube selection in response to amount of food was derived and predicted our experimental findings regarding the choice of connection. When three FSs were presented to the organism, the longer tubes were also the first to collapse, explained by the relative probability of disconnection. The size of the FS is thus a key parameter determining network formation. 査読付原著論文 インパクトファクター(-) 被引用回数(-) 責任著者 Toshiyuki Nakagaki journal article World Scientific Publishing Co. 2007 Proceedings of Int. Symp. On Topological Aspects of Critical Systems and Networks 94 100 http://hdl.handle.net/10445/4406 https://fun.repo.nii.ac.jp/records/4173 eng metadata only access