Fig. 6. Variation in for affects response to food quality. (A) Expression of forT2 was sufficient to increase developmental rate and survivorship in food-deprived sitter larvae raised on low nutrient media (25% or 15%) [development time: at 25% (F_(2,27)=17.78, P<0.0001) and at 100% (F_(2,26)=0.95, P=0.4); survivorship: at 15% (F_(2,29)=4.07, P<0.03) and at 100% (F_(2,28)=0.66, P=0.5)]. (B) PKG enzyme activity is inversely related to food intake. Rovers (for^R) had significantly higher PKG activity than sitters (for^s and for^s2) when reared on high food levels, but this difference diminished when larvae were food-deprived [two-way ANOVA: for strain (F_(2,63)=57.36, P<0.0001), food level (F_(2,63)=95.26, P<0.0001), strain-by-food level (F_(4,63)=11.67, P<0.0001); ANOVA: for 100% (F_(2,21)=87.9, P<0.0001), 25% (F_(2,21)=14.39, P<0.0001), 15% (F_(2,21)=0.70, P=0.5) food level]. (C) Sitter larvae expressing a forT2 transgene expressed a rover-like pattern of food [two-way ANOVA: for strain (F_(2,261)=3.78, P=0.02), food level (F_(2,261)=2.85, P=0.06), strain-by-food level (F_(4,261)=1.60, P=0.2); one-way ANOVA by strain: for 100% (F_(2,87)=6.87, P<0.002), 25% (F_(2,87)=0.32, P=0.7), 15% (F_(2,87)=0.42, P=0.7) food level].