Figure 3. Effect of female age on mating duration of Propylea dissecta. 10 day-old males (green; Y = 12.7 + 22.7 x - 0.542 x2; r2 = 0.623; P < 0.001). 20 day-old males (blue; Y = 59.4 + 23.8 x - 0.583 x2; r2 0.51; P < 0.001). 30 day-old males (pink; Y = 11.6 + 34.4 x - 0.836 x2; r2 = 0.75; P < 0.001). Best fit lines..