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. 2013 Sep 10;8(9):e74681. doi: 10.1371/journal.pone.0074681

Figure 3. Norms of reaction of wild-derived Drosophila populations.

Figure 3

Lifespan and fecundity showed different shapes of response to yeast concentration. The effect of yeast concentration on lifespan best fitted a third-order polynomial equation (non-linear regression) and on fecundity a linear equation (linear regression). Goodness of fit is high in both models, as represented by R2 values: For mean lifespans: 0.88, 0.74, 0.80, 0.88, 0.79 for WDah, FRA, GRE, GER, NETH strains respectively. For fecundity: 0.90, 0.87, 0.87, 0.89, 0.91 for WDah, FRA, GRE, GER, NETH strains respectively. For mean lifespans, best-fit values ranged for B0: 6.6 to 28, for B1: 86.5 to 176, for B2: -81.6 to -151, for B3: 20.9 to 36.8. Linear regression analysis for fecundity: for WDah: F = 484.2, DFn = 1, DFd = 48, p<1×10−4, for FRA: F = 335.7, DFn = 1, DFd = 48, p<1×10−4, for GRE: F = 309.9, DFn = 1, DFd = 48, p<1×10−4, for GER: F = 373.6, DFn = 1, DFd = 48, p<1×10−4, for NETH: F = 508.2, DFn = 1, DFd = 48, p<1×10−4. Lifespan curves and fecundity slopes differed significantly among strains (for lifespan curves: F = 63.23, DFn = 16, DFd = 230, p<1×10−4, for fecundity slopes: F = 27.10, DFn = 4, DFd = 240, p<1×10−4).