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Fig. 5. Bivariate plots for cumulative protein and carbohydrate consumption by
S. littoralis caterpillars over the successive days during their
final larval stadium. (A–D) Nutrient consumption of caterpillars
provided with the four equal-ratio 21:21 diets containing 0% (A), 20% (B), 50%
(C) and 80% (D) zein in their protein component, respectively. The two dotted
lines represent the protein:carbohydrate (P:C) ratio of the two choice foods
presented to the insects (21:21 and 35:7 diets). Values are means ± 1
s.e.m. (N=8–10).