Fig. 5. Different Drosophila strains and species show different egg-laying rates in the same environment.

(A to C) Mean egg-laying rate during the search period on a substrate as a function of time since visiting another substrate. The 90% confidence interval is shaded. (A) Ninety percent confidence intervals of 0 and 200 mM egg-laying rate curves for CS flies in a 0 mM versus 200 mM chamber in light and medium gray, respectively, for comparison [reproduced from (16)]. P values are calculated using the two-sided Wilcoxon rank sum test (Materials and Methods) and are comparing 0 and 200 mM for the indicated bin. Filled arrows indicate first bin past 5 s for which P > 0.05 (i.e., a quantitative estimate of when the curves merge). Filled arrow for CS flies is marked with a star because the 0 and 200 mM egg-laying rate curves do not merge within the plotted interval. (D) Fraction of eggs on 0 mM with 95% confidence interval. Each dot represents one fly. (E) Fraction of time spent on 0 mM per fly. Each dot represents one fly. (F) Eggs laid per fly. Each dot represents one fly. (G and H) Mean locomotor speed aligned to egg deposition. In total, 214, 1184, 766, and 1862 eggs for D. suzukii, TUT, DL, and CS, respectively. In (D) to (H), CS data are from (16).