Figure 4.

Historical effective population sizes for six species of sharks inferred using PSMC

(A) Three apex predators (top to bottom silhouettes): shortfin mako, great hammerhead, and white shark.

(B) Cloudy catshark.

(C) Brownbanded bamboo shark.

(D) Whale shark. Most ancient, highest peak of Ne (including region of greatest bootstrap variability) was truncated in order to alter the scale of the Y axis sufficiently to depict the slight difference in trajectory that was apparent between these two whale shark individuals—one from near Taiwan²³ and the other from the Korea aquarium²² (original sample location not provided).

(E) Harmonic mean effective population size for each species trajectory using different time cutoffs; recent time cutoffs: 10,000 years ago; ancient cutoffs: 2e6 years ago.