Figure 2From: Cooperative social clusters are not destroyed by dispersal in a ciliateExample of a digital picture of Tetrahymena thermophila used to quantify aggregation behavior. The circle indicates limits of the study area, corresponding to the viewing field through the microscope. The magnified portion illustrates the point location (grey dots) of cells as computed by ImageJ analysis software, and the grid approximation used to compute the point pattern statistics via the Programita software (see text for details).Back to article page