Fig. 2. Effects of dietary conditioning (A) and parasitism (B) by Cotesia congregata on diet consumption and growth of the host Manduca sexta, when given a dietary choice. Nutrient consumption is shown as a bivariate plot of protein diet and carbohydrate diet consumption. Values are indicated by mean ± least-squares S.E.M.; horizontal bars refer to protein diet and vertical bars to carbohydrate diet. Values followed by different letters are statistically different for the protein diet or carbohydrate diet, indicated by the directional error bar. Triangles and lower case letters, and circles and upper case letters, refer to the duplicate Experiments (Exp.) 1 and 2, respectively. Newly moulted normal and parasitized fifth-instar larvae were conditioned for 1 day on a synthetic artificial diet containing sucrose without casein, or casein without sucrose (both nutrients at 120 g l–1), and subsequently given a choice of the two diets for an additional 2 days. The effects of conditioning and parasitism on growth are shown in the insets. All values are g wet mass. Data were analyzed by two-way ANCOVA with initial mass as the covariate. No significant interaction between conditioning and parasitism was evident. For a statistical summary, see Table 2.
