Fig. 2.

C. elegans feeding is a stochastic process. (A) Pumping rate as a function of food level. Error bars denote 5th and 95th percentiles. The boxes show the upper and lower quartiles. $N=14$, 12, and 14 for food levels of ${\text{OD}}_{600}$ 0, 2, and 4, respectively. (B) Duty ratio (fraction of rapid pumping) as a function of food level. The duty ratio was defined as the fraction of time during which consecutive pumps were $\le$500 ms apart. Error bars show $5$th and $95$th percentiles. (C and D) Duration of bursts ${\tau }_{\text{on}}$ and pauses ${\tau }_{\text{off}}$ for the three food levels. Bursts are defined as series of continuous pumps $\le$500 ms apart. Colors are the same as in A and B. A and B are reproduced from data presented in ref. 4.