Additional file 2.

Alternative chemotaxis performance analyses. Figure with two panels showing alternative analyses of chemotaxis performance for different strategies. Panel A: Chemotaxis performance (as defined in Figure 2) for bacteria with linear (blue) and adaptive (red) responses, as a function of attractant drift velocity d, for infinite τ. Response parameters are optimized for each value of d. Panel B: Average attractant concentration, normalized by maximum attractant concentration, experienced by bacteria with linear (blue) and adaptive (red) responses, as a function of τ for d = 0. Response parameters are optimized for each value of τ. Both plots indicate that linear responses can work effectively for longer τ and smaller d, but that the adaptive response provides superior performance, can find the attractant faster, and is much less sensitive to attractant motion.

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Soyer and Goldstein BMC Evolutionary Biology 2011 11:240   doi:10.1186/1471-2148-11-240