Figure 7From: Dynamics of a delayed phytoplankton-zooplankton system with Crowley-Martin functional response The effects of different time delays on the existence of periodic solutions. We take the same parameters as in Figure 5. The black line is for \(\tau=0.59\), the red dashed line for \(\tau =0.75\), and the green line for \(\tau=0.95\). (a) The time series of the phytoplankton. (b) The time series of the zooplankton.Back to article page