Panel A: variation of the effective population size (Ne) through time and its 75% confidence interval estimated by the stairwayplot. Panel B: normalized SFS computed as in (Lapierre et al., 2017). Carcharhinus amblyrhynchos is represented in red, Carcharhinus limbatus in green, Carcharhinus melanopterus in blue, and Galeocerdo cuvier in purple.