So I have been trying to find an answer to this question in the literature but to no avail. I am looking at the Tero and other articles on the slime mold Physarum polycephalum. I understand the models for simple mold adaptation when presented with food sources, etc. However, I was trying to understand the behavior of these Physarum when they are starved. In the pictures, the starved mold always seems like it has a very dense network of tubes distributed around the entire agar plate or film. I wanted to understand if there are any particular rules that govern how Physarum goes from having the shortest path for getting nutrition from a food source to having a big network of tubes when starved. Any clues on this one?