Fig. 3.

Host preferences of conditioned parasitoids and periodic dynamics. (A) The number of successful ovipositions on C. maculatus (green) and C. chinensis (blue) over time (mean ± SEM). Parasitoids were conditioned for C. maculatus or C. chinensis, and not conditioned (sample sizes ranged from 20 to 30). (B–D) Summary measures of temporal patterns in host population dynamics and parasitoid's preference. (B) The autocorrelation function (ACF) of C. chinensis and C. maculatus. (C) Cross-correlation functions between C. chinensis density at time t + L and C. maculatus density at time t as a function of time lag L (black lines were calculated by the time series with BR = 0.8, and gray lines were calculated with BR = 0.5). (D) Cross-correlation functions between host preference of the parasitoid at time t and the adult population density of C. chinensis (blue line) or C. maculatus (green line) at time t + L as a function of time lag L. Solid lines, the cross-correlation function of the time series at BR = 0.2 (Fig. 1D); dotted lines, the cross-correlation function of the time series at BR = 0.5 (Fig. 1F).