Figure 2
Monthly changes for Sterechinus neumayeri in (A) gonad index for males (blue) and females (red); (B) mean equivalent circular diameter (ECD) of oocytes present in female gonads; (C) percentage (%) of gonad tissue in females composed of nutritive phagocytes; (D) percentage frequency (%) of male gonad maturity stages where frequencies are smoothed by the function y ~ x using the local regression smoother (LOESS) method. The smoothing span was chosen to reflect seasonal changes. Data as box plots are displayed with the central line in the boxes representing the median value, the upper and lower hinges representing the 25th and 75th percentiles, and the upper/lower whiskers representing the largest/smallest value, no further than 1.5 times the interquartile range from the hinge. All data outside these ranges are plotted as points.
