Figure 4:

Offspring sex ratios show much higher level of variability for zebrafish (PSD) than Nile tilapia (CSD). (A) Crossing a single zebrafish male with four different female partners yielded offspring groups with very different sex ratios (13.1–81.8% males; data are from [26]). (B) Crossing a Nile tilapia male (XY) with four different female partners (XX) yielded offspring groups with very similar sex ratios (data are from [116]). Checkered bars indicate males, and solid bars indicate females.